MOUNTING AND
OPERATING INSTRUCTIONSEB 31a-22

Translation of the original manual

Pneumatic rotary actuator Edition 2020+
Single and double-acting piston actuator,
type DAP and SRP
December 2021 edition

PFEIFFER Chemie-Armaturenbau GmbH · Hooghe Weg 41 · 47906 Kempen · Germany
Phone: +49 2152 2005-0 · Fax: +49 2152 1580
sales-pfeiffer-de@samsongroup.com · www.pfeiffer-armaturen.com

Note regarding this installation and operating manualThis Installation and Operating Manual (EB) provides guidance
for safe assembly and operation.
The notes and instructions in this EB are binding when handling
PFEIFFER devices. The figures and illustrations in this EB are
examples and must therefore be considered as such.
Ö For safe and correct use, read this EB carefully prior to use
and keep it for later reference.
Ö In the case of questions that go beyond the scope of this EB,
please contact the After Sales Service at PFEIFFER ChemieArmaturenbau GmbH.
Ö This manual only applies to the rotary actuator itself, therespective additional manual applies for the installed valve.

Definition of signal words
DANGER
Hazardous situations that lead to death or serious injuries

WARNING
Situations that can lead to death or serious injuries

NOTE
Property damage and malfunctions

Info
Additional information

Tip
Recommended action

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Content

Content
1

Safety instructions and safety measures

1-1

1.1

Notes regarding possible severe personnel injury

1-2

1.2

Notes regarding possible personnel injury

1-2

1.3

Notes regarding possible property damage

1-3

2Markings on the device

2-1

2.1

Actuator type plate

2-1

3

Design and principle of operation

3-1

3.1

Function

3-1

3.2

Technical data

3-1

3.3

Variants

3-1

3.4

Rotation and travel limit

3-1

3.5

Fail-safe position and direction of action

3-1

3.5.1

Single acting rotary actuator (SRP)

3-1

3.5.2

Double-acting rotary actuator (DAP)

3-2

3.5.3

Changing the fail-safe position

3-2

3.6

Actuation

3-2

3.7

Attachments

3-2

3.8

Control pressure

3-2

3.9

Operating media

3-2

3.10

Operating temperature

3-4

3.11

Lubrication

3-4

3.12

Coating and corrosion protection

3-4

3.13

Response time

3-4

3.14

Rotary actuator assembly

3-4

3.14.1

Shaft assembly

3-4

3.14.2Assembly of the adjusting screws,

3-5

3.14.3

Cam assembly

3-5

3.14.4End cap assembly

3-6

3.14.5Adjusting the end position on the standard actuator

3-7

3.14.6

Mounting the position indicator

3-7

4

Shipment and on-site transport

4-1

4.1

Accepting delivery

4-1

4.2

Unpacking the actuator

4-1

4.3

Transporting and lifting the actuator

4-1

4.3.1

Transporting the actuator

4-1

4.3.2

Lifting the actuator

4-1

4.4
5

Storing the actuator
Installation

4-3
5-1

5.1

Installation conditions

5-1

5.2

Preparing for assembly

5-1

5.3

Assembling the device

5-1

5.3.1

Controls and connections

5-2

5.3.2

Assembling the valve and actuator

5-2

Assembling accessories

5-3

5.3.3
5.4

Establishing the pneumatic connection

EB 31a-22_EN
December 2021 edition
Subject to technical changes

5-3Content

6

Start-up

7

Operation

7.1
8Actuator operation
Malfunction

6-1
7-1
7-1
8-1

8.1

Detecting and rectifying errors

8-1

8.2

Carrying out emergency measures

8-2

9Servicing

9-1

9.1

Periodic tests

9-1

9.2

Preparing for maintenance and conversion work

9-1

9.3

Assembling the valve after maintenance and conversion work

9-2

9.4

Maintenance work

9-2

9.5

Conversion work

9-2

9.6

Ordering spare parts and consumables

9-4

10 Decommissioning

10-1

11 Removal

11-1

11.1

Releasing the spring tension in the actuator

11-1

11.2

Disassembling the actuator

11-2

12 Repairs

12-1

12.1

Replacement of defective components

12-1

12.1.1

Removing the position indicator

12-1

12.1.2

Remove the adjusting screws

12-1

12.1.3End cap disassembly

12-1

12.1.4

Piston disassembly

12-2

12.1.5

Shaft disassembly

12-4

12.2

Additional repairs

12-4

12.3

Sending devices to PFEIFFER

12-4

13 Disposal

13-1

14 Certificates

14-1

15 Annex

15-1

15.1

15-1

Tightening torques, lubricant and tools

15.1.1

Tightening torques

15-1

15.1.2

Lubricant15-2

15.1.3

Tools

15-2

15.2

Spare and wear parts

15-2

15.2.1

Spare parts for rotary actuator DAP/SRP 00060 to 01200 (rotation angle 0° to 90)

15-3

15.2.2

Wear part sets for rotary actuator DAP/SRP 00060 to 01200

15-4

15.2.3

Springs Edition 2020+

15-4

15.3

Service15-4

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Safety instructions and safety measures

1

Safety instructions and safety measures

Intended use
The PFEIFFER-rotary actuator BR|31a Edition|2020+ is intended
for the actuation of an installed control valve, ball valve or otheractuation with a rotating throttle housing. Together with the valve,
the rotary actuator is used to cut off fluid, gaseous or vaporous
media in pipes. The rotary actuator is suitable for control tasks or
ON/OFF operation. The rotary actuator can be used in process
technology and industrial plants.
Due to an attachment according to VDI/VDE 3847 a special interface is provided. The interface permits a pipeless mounting of
positioners, solenoid valves and other accessories.
Conventional automation according to VDI/VDE 3845 is still
possible.
The rotary actuator is designed for precisely defined conditions(e.g. signal pressure, torque, opening angle, direction of turningand action). Therefore the operator must make sure that the rotary actuator is only used when the conditions of use comply withthe design criteria defined in the order. If the operator would liketo use the actuator in other applications or environments, theymust contact PFEIFFER.
PFEIFFER shall not be held liable for damage that result from
non-compliance with the intended use, as well as for damage
that results from external forces or external influences.
Ö Limits of use, areas of use and possible uses can be found in
the technical data and on the type plate.
Reasonably foreseeable erroneous use and unintended use
The rotary actuator is not suited for the following areas of use:
− Use outside of the technical data and the limits defined by thedesign.
− Use outside of the limited defined by the attachments installedon the rotary actuator.
− Use in a corrosive environment with unsuitable protection.
Furthermore, the following activities are considered unintendeduse:− Use of third-party spare parts.
− Disassembly of individual spring cartridges.
− Performance of maintenance and repair work that is not described.

Qualification of operating personnel
The rotary actuator may only be disassembled, dismantled, assembled and commissioned by specialist personnel who are familiar with the assembly, commissioning and operation of thisproduct.
− Specialist personnel in terms of this installation and operating
manual are persons who, on the basis of their vocational education, knowledge and experience and knowledge of therelevant standards, are capable of evaluating the assigned
tasks and identifying possible hazards.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Personal protective equipment
PFEIFFER recommends the following protective equipment whenhandling the pneumatic rotary actuator BR|31a:− Protective gloves and safety shoes during assembly and disassembly of the actuator.
− Eye protection and hearing protection when operating the rotary actuator.
Ö Request additional protective equipment from the plant operator.
Changes and other modifications
Changes, conversions and other modifications to the product are
not permitted without consulting PFEIFFER. Non-compliance invalidates the product guarantee. PFEIFFER shall not be held liable
for any resulting property damage or personal injury.
Protective devices
In the case of a power supply failure, the rotary actuator automatically switches to a certain fail-safe position.
− The fail-safe position corresponds to the direction of action
and is indicated on the type plate of PFEIFFER rotary actuators, see chapter “2.1 Type plate of the actuator”.
Warning of residual risks
To prevent personal injury or property damage, the operator andoperating personnel must use suitable measures to prevent thehazards that can result from the signal pressure, tension energyof the springs and moving parts of the rotary actuator.
− Therefore, the operator and operating personnel must observe all the hazard information, warning information andinformation in this installation and operating manual.
Obligation of the operator to exercise diligence
The operator is responsible for proper operation as well as compliance with the safety regulations.
− The operator is responsible for providing operating personnel
with this installation and operating manual as well as the applicable documents and to provide instructions on proper operation.
− Furthermore, the operator must ensure that operating personnel and third parties are not endangered.
− It is not the responsibility of PFEIFFER and therefore when using the rotary actuator make sure that the rotary actuator isonly used as intended as described in this chapter.
− These instructions do not replace the safety and work instructions provided by the operator. In the case of conflicts between these instructions and the procedure defined by the operator, the differences shall be clarified in writing between an
authorised representative of the operator and an authorised
representative of PFEIFFER.
Obligation of operating personnel to exercise diligence
Operating personnel must be familiar with this installation andoperating manual and the applicable documents and comply
with the indicated hazard information, warning information and

1-1

Safety instructions and safety measuresother information. Furthermore, operating personnel must be familiar with the applicable regulations concerning occupationalsafety and accident prevention and observe them.

1.2 Notes regarding possible personnel injury

Applicable standards and directives

Danger of crushing due to moving parts!

− In reference to the Machinery Directive 2006/46/EU, the actuators can be classified as a “part of a machine”. The commissioning of the actuator is also prohibited until the machine
and/or the final system in which the actuator is installed fulfils the requirements of directive 2006/46/EU and withwhich compliance is declared.

The rotary actuator contains moving parts (actuator stem,
switching shaft, etc.) that can lead to crushing if reaching into it.

− The non-electrical actuators are designed, built and classified
in compliance with ATEX Directive 2014/68/EU. Use inzones with a potentially explosive atmosphere must comply
with the classification of the actuator and the ATEX safety
regulations.
− PFEIFFER pneumatic rotary actuators are not considered pressure equipment according to Directive 2014/68/EU.
− The rotary actuators comply with TR CU 10/2011 and TR CU
12/2011.

1.1 Notes regarding possible severe personnel injury
DANGER
Hazards and ineffectiveness of the warranty!
In the case of non-compliance with the following hazard andwarning information, hazards may arise and the warranty provided by PFEIFFER may become invalid.
Ö Observe the following hazards and warning information.
Ö Contact PFEIFFER in the case of questions.
Risk of bursting of the rotary actuator!
Rotary actuators are pressurised. Improper opening can cause
the bursting of actuator components.
Ö Before working on the actuator, depressurise the concernedplant parts and the actuator.

WARNINGÖ Do not reach into or under the switching shaft as long as thepneumatic power is connected to the actuator.
Ö When working on the rotary actuator, interrupt and lockpneumatic energy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects in the yoke to hinder theoperation of the switching shaft.
Ö If the actuator- and switching shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see chapter “11.1 Releasing the spring
tension in the actuator”.
Danger of injury due to venting the actuator!
The rotary actuator is pneumatically operated, therefore exhaust
air escapes after it is controlled.
Ö Install the valve such that at the operator level (unless otherwise described in the valve documentation, the operator level
for the valve is the front view of all operating elements of thevalve including the attachments from the perspective of operating personnel) there are no are no vent holes at eye level orvalve holes that ventilate towards their eyes.
Ö Use suitable silencers and plugs.
Ö When working near the actuator, wear eye and hearing protection.
Danger of injury due to preloaded springs!
The end caps are tensioned due to the compressed springs. Furthermore, improper disassembly of the spring cartridge can leadto serious injuries.
Ö Before starting work on the rotary actuator, disconnect all
pneumatic, hydraulic and electrical supply lines and release
the pressure from the rotary actuator.
Ö When disassembling the end cap, bring the rotary actuatorto the “closed” (0°) position and remove the fastening screws
correctly.
Ö Do not disassemble an individual spring cartridge.
Ö Contact PFEIFFER to service the spring cartridges.
Danger of injury due to incorrect operation, use or installation
caused by illegible information on the actuator!
Over time, imprints or impressions on the actuator can soil theadhesives and signs or make them illegible for other reasons sothat dangers are not recognised and necessary operational messages cannot be followed. Danger of injury can occur.
Ö Keep all relevant markings on the device legible at all times.
Ö Damaged, missing or faulty signs or adhesives must be replaced immediately.

1-2

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Safety instructions and safety measures

1.3 Notes regarding possible property
damageNOTE
Damage to the rotary actuator due to improper fastening of thesling!
Ö Do not fasten load-carrying fastening equipment to the travel
limit or the optional hand wheel (emergency manual gear).
Damage to the rotary actuator due to excessively high or low
tightening torques!
The rotary actuator components must be tightened with specifictorques.
Ö Excessively tightened components are subject to increased
wear. Components that are not sufficiently tightened cancause the components to release, see Chapter “15.1.1 Tightening torques”.
Damage to the rotary actuator due to unsuitable tools!
Unsuitable tools can damage the actuator.
Ö Suitable tools are required to work on the actuator, see Figure15-1 and Table 15-8 in Chapter “15.1.3 Tools“.
Damage to the rotary actuator due to unsuitable lubricants!
Unsuitable lubricants can corrode and damage the surface.
Ö The actuator material requires suitable lubricants, see Table
15-7 in Chapter “15.1.2 Lubricants”.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

1-3Safety instructions and safety measures

1-4

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Markings on the device

2Markings on the device

2.1 Actuator type plate
The actuator type, size, operating pressure, torque, rotation direction, spring effective direction, operating temperature and connection
type are specified by the actuator designation.
The type plate is glued onto the actuator housing. The type plate contains all data required for device identification.

Fig.|2-1:

Type plate for double-acting rotary actuators (DAP)

Fig.|2-2:

Type plate for single-acting rotary actuators (SRP)InfoMarkings on the housing and the type plate must be permanent so that the valve remains identifiable.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

2-1Markings on the device

Table|2-1: Marking on the actuator type plate
Information
Distinctive marking: (variable)

Pos.

Remark1

Order number

2

Item number from the order

3

Serial number (automatic assignment)

Accessory connection: (fixed, depending on theactuator size)

4

AA1 to AA4 (according to VDE/VDI size 1 to 4)

Air connection: (fixed, depending on the actuator
size)

5

PC1 = size 1/8“PC2 = size 1/4“PC3 = size 3/8“PC4 = size 1/2“Max. permissible pressure: (fixed)

6With BR 31a, always 10 bar

Mode of operation: (variable)

7

Actuator function:

single-acting / double-acting

8

Direction of action:

CW = Clockwise (spring closes)
CCW = Counterclockwise (spring opens)

9

Schematic representation:

Rotation direction to springs and air connection.
Namur interface with marking of ports “2” and “4”10Series:BR 31a11

Type:

SRP / DAP

12

Actuator size:

00060 to 01200

13

Spring designation:

2.5 to 6 (bar)140-90° +5/-15°
0-120°+/+5/-15°
0-180° +5/-15°

Exact type designation: (variable)

Swing angle: (fixed, depending on the actuator size)

Item number: (variable)

15

Pfeiffer – item number

Version according to EN: (fixed, depending on theactuator size)
Example:F07-Y-D-17

16

Flange F07

17

Spigot ( Y )18

Diagonal square drive ( D )19Square drive SW 17

20

Specification of actuator torque depending on the supply air pressure

Torques: (variable)

2-2

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Design and principle of operation

3

Design and principle of operation

The PFEIFFER-rotary actuator BR 31a Edition 2020+ is suitablefor use in closed or open environments and is installed on− Control valves− Ball valves− Rotary plug valves− Sampling taps
− Pig valves− Rotary actuator with spring-centred mid-position, see data
sheet  DB 31a-07.
− Fast closing rotary actuator, see data sheet  DB 31a-13.
− Rotary actuator for the low temperature range, see data sheet DB 31a-11.
− Rotary actuator for “water” control medium, see data sheet DB 31a-14.
− Rotary actuator with additional travel limit, see data sheet DB 31a-15.

− Additional actuators installed with a rotating throttle housing.

− Rotary actuator with adjustable hydraulic damping, see data
sheet  DB 31a-23.

3.1 Function− Addition variations possible upon request.

− Stainless steel actuator, see data sheet  DB 31a-06.

The actuator is a pneumatic component for the remote control ofvalves.
The signal pressure generates a force on the piston surface bymeans of springs installed in the actuator in the single-acting
version (SRP) and by a counterpressure in the double-acting
version that can be compensated for.
The force generated on the pistons is transformed by the piston
shaft into a rotary movement.
In the single-acting version, the number of springs determines thespring return torque and the required signal pressure.

3.2 Technical data
The type plates of the rotary actuator offer information about thevalve version, see Chapter “2 Markings on the device”.

3.4 Rotation and travel limit− Standard actuator: 90° rotation angle with end position
adjustment at 0° and 90°, +5/-15°
adjustable.
− 120° actuator:

120° rotation angle with end position
adjustment at 0° and 120°, +5/-15°
adjustable.

− 180° actuator:

180° rotation angle with end position
adjustment at 0° and 180°, +5/-15°
adjustable.

Adjustable end positions for the OPEN/CLOSED position permit
the fine adjustment of the end stops of between +5° / -15°.
Refer to the respective data sheet for the travel of the rotaryactuator, see chapter “3.3 Variants”.

Info
Detailed information is available on the data sheet  TB 31a-22.

3.5 Fail-safe position and direction of action
3.3 Variants
Info
Only the PFEIFFER rotary actuator BR 31a Edition 2020+ is prepared for automation according to VDI/VDE 3845 and
VDI/VDE 3847. The other actuators listed are only automatedaccording to VDI/VDI 3845.

3.5.1

Single acting rotary actuator (SRP)

Two different rotary movements are possible that become effective when the piston pressure is released or if there is a power
supply failure.
Fail-close:
CW spring closing, the actuator turns clockwise.

− Edition 2010 automation according to VDI/VDE 3845, seedata sheet  TB 31a.
− Double-acting rotary actuator for 120°, 135°, 180°, see data sheet  DB 31a-08.
− Single-acting rotary actuator for 180°, see data sheet DB 31a-12.
− Rotary actuator with hydraulic damping, see data sheet DB 31a-05.
− 3-position actuator, see data sheet  DB 31a-09.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Fig.|3-1:

Spring closing

3-1

Design and principle of operation

The standard version of the BR 31a rotary actuator is installed
along the valve flow direction.

3.6 Actuation

When actuated at port “2”, the shaft rotates counterclockwisefrom the start position “CLOSED” to the end position “OPEN”.

There are different options for the actuation (90°, 120° or 180°
rotation angle):

In pressure is lost at port “2”, the shaft turns clockwise to the start
position “CLOSED”.

− Direct mounting of a solenoid valve (5/2 or 5/3 for double
acting, 3/2 for single acting) for connecting to ports “2” and“4”.

The actuator is delivered in the start position.

− Hook-up (to ports “2” and “4”) with separate control unit.
Info
If mounted diagonally to the valve flow direction (turn 90°), makesure that the position indicator is set correctly, see chapter “5 Assembly”.

3.7 Attachments
The following accessories are available for the actuator, either individually or in combination:

Fail-open:
CCW spring closing (only SRP), the actuator turns counterclockwise− Positioner− Limit switch− Solenoid valves− Pressure reducer− Pressure gauge mounting blocks− Throttles− Volume booster− Quick exhaust valve− Emergency manual gear
− Other additional equipment is possible according to specifications.

Fig.|3-2:

Spring opening

3.8 Control pressure
The maximum control pressure is 10 bar (145 PSI).

If the actuator shaft rotates clockwise when the valve is opened,in addition to the standard version pumps according to “Fig. 3-2:
Spring opening” are installed.
The shaft rotates clockwise from the start position “OPEN” to theend position “CLOSED”.
The actuator is delivered in the start position.

For double-acting and single-acting actuators, the operatingpressure is between 2.5 bar (36 PSI) and 10 bar (145 PSI).

3.9 Operating media
Dry or lubricated air or inert gases, provided that they are compatible with the actuator’s internal parts and lubricant used.

3.5.2

Double-acting rotary actuator (DAP)The actuator type DAP is equipped without springs. A definedend position is not reached upon air failure.
− The standard rotation direction is closing in the clockwise direction “CW”.

Info
The operating media must have a dew point of -20°C (-4°F) or atleast 10°C (50°F) below the ambient temperature. The maximum
particle size contained in the operator media must not exceed
30 μm.

− The counterclockwise direction “CCW” for double-acting actuators is achieved by applying pressure to port 2.

3.5.3

Changing the fail-safe position

The fail-safe position of the rotary actuator can be reversed if
necessary, see Chapter “9.5 Conversion work”.

3-2

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Design and principle of operation

Fig.|3-3:

Exploded drawing of the rotary actuator version Edition 2020+

Table|3-1: Parts list for the rotary actuator version Edition 2020+
Item

Designation

Item

1

Cam (end position adjustment)

16

Designation
O-ring2

Adjusting screw

17

Spring cartridge

3

Lock nut

18

Retaining ring

4

Washer19

Position indicator

5

Bearing (piston back)20

Shaft seal (bottom)

6

Shaft bearing bushing (top)21

Shaft seal (top)7

Shaft bearing bushing (bottom)

22

End cap (right)

8

Thrust bearing

23

End cap (left)
Screw (position indicator)

9

Plug (to seal air port)

24

10

Supporting ring25

Piston11

Seal (adjusting screw)

26

Type plate

12

Piston guide27Type plate (end cap)

13

Screw (end cap)

28

Spigot14

End cap seal

29

Housing

15

Bearing (piston head)

30

Shaft

EB 31a-22_EN
December 2021 edition
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3-3Design and principle of operation

3.10 Operating temperature− Standard actuator:
from -40°C (-40°F) to +80°C (+176°F).
− Low temperature actuator SLT with silicon o-rings:
from -55°C (-67°F) to +80°C (+176°F).
− High temperature actuator HT with FPM o-rings:
from -15°C (+5°F) to +150°C (+300°F).
Info
For low as well as high temperature use, special lubricants are
required. Please contact PFEIFFER. A high or low temperature
can influence the service life of the actuator.

3.14 Rotary actuator assembly
Info− All components are clean and in a perfect condition.
− For assembly, use the grease recommended by PFEIFFER, see
Table 15-7 in Chapter “15.1.2 Lubricants”.

3.14.1 Shaft assembly(see Fig. 3-3, Fig. 3-4, Fig. 3-5 and Fig. 3-6)

3.11 Lubrication
The actuators are delivered lubricated for the service life of theactuator. The standard lubricant is approved for a temperature
range from -40°C (-40°F) to +80°C (+176°F). For low (SLT) andhigh (HT) temperatures, a special lubricant is required. Pleasecontact PFEIFFER.
Info
For lubricants recommended for the rotary actuators when used
under standard conditions, see Table 15-7 in Chapter “15.1.2
Lubricants”.

3.12 Coating and corrosion protection
All actuators are protected against corrosion under normal
weather conditions. The corrosion resistance of the different typesof coatings is described on the data sheet.
Info
Before mounting the actuator in a corrosive environment, makesure that the selected type of protection is suitable.

Fig.|3-4:

Shaft

Ö Assemble the top and bottom shaft bearing bushings (6 and 7).
Ö Assemble the top and bottom shaft seals (20 and 21) on theshaft.
Ö Grease the outside of the shaft surface at the top and bottom,
see Fig. 3-4.
Ö Guide the shaft (30) partially into the housing (29), see Fig.
3-5.

3.13 Response time
The response times can be found on the data sheets for the respective actuator sizes, see  DB 31a-E2010.
Info
The response time depends on several factors, such as supply
pressure, flow rate of the operating medium (pipe diameter, flow
capacity of the pneumatic components), valve type, valve torqueand characteristics, applied safety factor, operating frequency
and temperature, etc.
Fig.|3-5:

3-4

Shaft assembly

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Design and principle of operation

Ö Fit the cam (1) in the desired position in reference to the top
and bottom position of the shaft, as well as the direction ofrotation of the actuator, see Fig. 3-6.

Fig.|3-8:

Shaft endÖ Assembling the piston o-ring (16)Fig.|3-6:

Cam position

Ö Fit the internal thrust bearing (8).
Ö Insert the shaft (30) completely.
Ö Fit the external thrust bearing (8).
Ö Fit the thrust washer (10) and spring clip (18) using pliers.

Ö Fit the piston bearing (5) and piston bearing (15).
Ö Grease the bearing surface of the piston (25) in the housing(29) and the piston teeth.
Ö Either clamp the top end of the shaft in a vice or hold theshaft end stationary with the corresponding counterpart andplace the housing (29) in a horizontal position, see Fig. 3-8.

3.14.2 Assembly of the adjusting screws,(see Fig. 3-3 and Fig. 3-7)

Fig.|3-9:

Cam position

Ö The cam (1) is located in the correct position, see Fig. 3-9.
Ö For the standard direction of rotation (clockwise to close),turn the housing (29) 40° to 45° counterclockwise, view frombelow.
Fig.|3-7:

Shaft endÖ From the view from the top, turn clockwise, depending on
how the shaft is held, see Fig. 3-10.

Ö Insert the adjusting screws (2) from the inside into the actuator housing mount.
Ö Insert the seals (11).
Ö Place the lock nuts (4) and washers (3) on the adjustingscrews (2).

3.14.3 Cam assembly(see Fig. 3-3, Fig. 3-8, Fig. 3-9, Fig. 3-10, Fig. 3-11 andFig. 3-12)

Fig.|3-10: Assembling the pistons - housing rotation angle

Ö Press both pistons (25) into the housing (29) at the same time
until the pistons are engaged and turn the housing clockwise

EB 31a-22_EN
December 2021 edition
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3-5Design and principle of operationor counterclockwise until the travel end is reached, seeFig. 3-10 and Fig. 3-11.

Fig.|3-11: Assembling the pistonsÖ Check that the pistons in the end position turn the shaft 4°
over the middle line (0°), see Fig. 3-12.

Fig.|3-14: Assembling the springs

For actuators with additional travel limit:
Ö Screw the adjusting screws (102) into the end caps (122 and123).
Ö Align the screw head on the end cap surface, see Fig. 3-15.
Ö Position the seal (111).
Ö Fit the washer (103).
Ö Screw on the lock nut (104).

Fig.|3-12: Assembling the pistons - end position

3.14.4 End cap assembly(see Fig. 3-3, Fig. 3-13, Fig. 3-14, Fig. 3-15, Fig. 3-16 andFig. 3-17)
For sizes 00900 to 03000, the end caps (22) and spring cartridges (17) are symmetric.
Ö Housing bearing surface.
Ö For single-acting actuators, insert the correct number ofspring cartridges, according to the table on the respective
data sheet, into the end cap, see Fig. 3-13 and Fig. 3-14.

Fig.|3-15: Additional travel limit

Table|3-2: Components of the additional travel limit

Fig.|3-13: Spring layout

3-6

Item

Designation

102

Adjusting screw

103

Lock nut

104

Washer

111

Seal

122

End cap (right)

123

End cap (left)

Ö Insert the end cap seal (14) in the groove of both end caps
(22 and 23).

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Design and principle of operation

90° (open), end position adjustment for an actuator in theopened position
Ö Turn the left screw (2) (view from the top) to the right or left
until the required end position is reached.
Ö Tighten the lock nut (4) to secure the position. Observe thetightening torque for the lock nut, see Table 15.2 in Chapter“15.1.1 Tightening torques”.

Fig.|3-16: Assembling the end cap screws

3.14.6 Mounting the position indicator(see Fig. 3-3 and Fig. 3-18)

NoteDanger of damage to components due to incorrect assembly!
When reinstalling, the end cap can be damaged due to an
uneven application of force of the compressed springs.
Ö Assemble the end cap and maintain a constant distance(A = B) between the rotary actuator housing and the housing
interface, see Fig. 3-15.
Ö Observe the installation sequence, see Fig. 3-16.

Fig.|3-18: Assembling the position indicatorÖ Place the position indicator (19) on the shaft and pay attention to the correct position.
Ö Tighten the screw (24).

Fig.|3-17: Assembling the end cap screws

Ö Assemble the end cap on the housing (29).
Ö Make sure that the o-rings lie in the grooves.
Ö Complete tightening the screws (13), tighten each screw inthe indicated order one rotation each, see Fig. 3-17.
Ö Tightening torques, see “15.1.1 Tightening torques”.

3.14.5 Adjusting the end position on thestandard actuator(clockwise to close)
0° (close), end position adjustment for an actuator in the closed
positionÖ Turn the right screw (2) to the right or left (view from the top)
until the required end position is reached.
Ö Tighten the lock nut (4) to secure the position. Observe thetightening torque for the lock nut, see Table 15.2 in Chapter“15.1.1 Tightening torques”.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

3-7Design and principle of operation

3-8

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Shipment and on-site transport

4

Shipment and on-site transport

The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.

4.3.1

Transporting the actuator

The actuator can be transported using lifting equipment such asa crane or a forklift.

4.1 Accepting delivery
Perform the following steps after receiving the goods:
Ö Check the scope of supply. Compare the data on the actuator
type plate with the delivery note. For details about the typeplate, see Chapter “2 Markings on the device”.
Ö Check the supply for transport damage. Report transport
damage to PFEIFFER and the transport company (see the delivery note).
Ö Determine the weight and dimensions of the units to be transported and lifted to select the corresponding lifting equipment
and load handling equipment.

4.2 Unpacking the actuator
Observe the following procedures:Ö Unpack the actuator only just before assembly.
Ö Leave the actuator on the pallet or in the transport container
for on-site transport.
Ö Do not remove the plastic protective caps from the ports “2”and “4”.
Ö Dispose of the packaging according to local regulations.

Ö Leave the actuator on the pallet or in the transport container
for transport.
Ö Comply with the transport conditions.
Transport conditions
Ö Protect the actuator against external influences, such as impacts.
Ö Do not damage the corrosion protection (paint, surface coating). Repair damage immediately.
Ö Protect the actuator against moisture and dirt.
Ö Observe the permissible temperature range, see data sheet DB 31a-22.

4.3.2

Lifting the actuator

When installing the actuator, larger actuators can be lifted using
lifting equipment such as a crane or forklift.
Conditions for liftingÖ Use a hook with a safety clamp as the suspension element,
see Fig. 4-1, so that the sling cannot slip off the hook duringlifting and transport.
Ö Secure the sling to the transport belt to prevent shifting andslipping off.

4.3 Transporting and lifting the actuator
DANGER
Danger due to falling of suspended loads!
Ö Do not stand under suspended loads.
Ö Secure the transport paths.

Ö Fasten the sling such that it can be removed again after installation on the valve.
Ö Avoid swinging and tipping the actuator.
Ö Do not drill any additional holes into the actuator.
Ö In the case of interruptions in work, do not leave the lifting
equipment suspended in the air for a long period of time.
Ö Lift always without the valve installed.

WARNING
Overturning of the lifting equipment and damage to the load
lifting equipment by exceeding the lifting capacity!
Ö Only used approved lifting equipment and load lifting equipment whose lifting capacity corresponds at least to the weightof the actuator including the packaging.

NOTE
Damage to the actuator due to improper fastening of the sling!
Ö Do not fasten load bearing slings to the hand wheel of an
optional emergency manual gear, bracket or any other component.
Ö Observe the conditions for lifting, see Chapter “4.3.2 Lifting
the actuator”.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Lift the actuator (without the valve)
Ö Use a hook with a safety clamp as the suspension element sothat the sling cannot slip off the hook during lifting and transport, see Fig. 4-1.
Ö Fasten the lifting sling on the actuator and the suspension element (e.g. hook) of the crane or forklift so it cannot slip.
Ö Lift the actuator carefully. Check if the load lifting equipment
holds.
Ö Move the actuator at a constant speed to the assembly site.
Ö Assemble the actuator on the valve, see “Table 15-5: Tightening torques on the ISO connection”.
Ö After assembly: Remove the lashing chain or lifting sling.

4-1

Shipment and on-site transport

Fig.|4-1:

Lifting points on the actuator

DANGER
Danger due to incorrect lifting and transport!
The lifting points for the lifting slings shown on the schematic
drawing serve as examples for most actuator variants. On site
the conditions for lifting and transporting the actuator canchange however.
Ö The operator makes sure that the actuator is lifted and transported safely.

Fig.|4-3:

Exploded drawing of the “Lift kit”

Table|4-1: “Lift kit” components

Lifting the actuator with the “Lift kit”

Item

Designation

H

Threaded pin

JWasherK

Nut

L

Extension

M

Eyebolt

Table|4-2: “Lift kit” components

Fig.|4-2:

Lift-kit

The actuators can also be lifted using the “Lift kit” designed forthis purpose.
The Lift-kit is not part of the supply scope of the actuator and canbe ordered separately, contact PFEIFFER.

4-2

SRP/DAPactuator

Weight in
kg 1)

Screw onthe end cap

Eyebolts

max. ZG
in kg 2)

00300

12.6

4x M10x35

M10

300

00450

18.1

4x M10x35

M10

300

00600

24

4x M12x50

M12

400

00900

31.6

4x M12x50

M12

400

01200

45.1

4x M14x55

M14

600

10000

251

8x M16x70

M16

700

1)

SRP weight with 6 springs

2)

Additional weight

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Shipment and on-site transport

Lifting the complete valve

WARNING− Recommended solution

Danger due to insufficient screw connections!
The lifted load requires a suitable screw connection of all screws
and pins required for lifting.
Ö Minimum screw connection, observe > 1x thread diameter.
Danger due to failure to observe the safety regulations!
Ö Comply with the safety regulations for load handling.
PFEIFFER does not accept any liability for improper handling of
the valve or additional loads.

4.4 Storing the actuator
NOTE
Damage to the actuator due to improper storage!
− Comply with the storage conditions.
− Avoid long storage periods.
− In the case of deviating storage conditions and a longer storage period, contact PFEIFFER.

Fig.|4-4:

Info
PFEIFFER recommends checking the actuator and the storage
conditions regularly during a longer storage period.

Lifting points for a complete valve

Storage conditions
Table|4-3: Maximum load to be lifted 3)
DAP/SRP
actuator

F05

00060

150

F07

00100

300

00150

300

F10

F12

F14

Ö If the valve and actuator are already assembled, observe thestorage conditions for the respective valve, see the corresponding documentation for the valve.
Ö In the case of storage prior to installation, the actuator should
normally be stored in a closed room where it is protectedagainst harmful influences such as impacts, dirt or moisture.
A room temperature of 25 °C ± 15 °C and a relative humidity of <75% are recommended.

00220

400

00300

400

Ö Secure the actuator in the storage position against slipping or
tipping over.

00450

600

00600

600

Ö Do not damage the corrosion protection (paint, surface coating). Remedy any damage immediately.

00900

1100

01200

1100

Ö Make sure that the surrounding area is free of acids or othercorrosive and aggressive media.
Ö Do not place any objects on the actuator.

Maximum load to be lifted in kg, in reference to the actuator
size and flange pattern. Actuator flange according to ISO 5211.
3)

WARNING
Danger due to improper fastening of the sling to the valve!
Ö Observe the detailed notes about lifting the complete valve,
see the corresponding documentation for the respective valve.

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December 2021 edition
Subject to technical changes

4-3Shipment and on-site transport

4-4

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Installation

5

Installation

The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.

5.1 Installation conditions
Ensure the following conditions prior to assembly:− The actuator is not damaged.
− The type, material and temperature range of the actuator
match the ambient conditions (temperatures, etc.). For details
about the type plate, see Chapter “2 Markings on the device”.

5.2 Preparing for assembly
Carry out the following preparation steps:Ö Get the material and tools ready that are required for assembly.
Ö Check that the optional vent plugs are not clogged.
Ö In the case of attachments, check the pressure gauge forproper function.
Ö If the valve and actuator are already assembled together,check the screw connections for the correct tightening torques. Components can loosen up during transport.

DANGER
Danger of injury due to preloaded springs!
The rotary actuators are tensioned due to the compressed
springs. Furthermore, improper disassembly of the spring cartridge can lead to serious injuries.
Ö Opening of the rotary actuator only according to the instructions, see Chapter “11.1 Releasing the spring tension in theactuator“.
Danger of injury due to escaping exhaust air!
The actuator is pneumatically operated, therefore exhaust air escapes after it is controlled.
Ö During assembly, make sure that ventilation openings are not
located at eye level on the operator level of the valve or ventilate towards eyes on the operator level.
Ö When working near the actuator, wear eye and hearing protection.
Danger of crushing due to moving actuator- and switching
shaft!
Ö Before working on the actuator, interrupt and lock pneumaticenergy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects to hinder the operationof the actuator- and switching shaft.
Ö If the actuator- and switching shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see chapter “11.1 Releasing the spring
tension in the actuator”.

5.3 Assembling the device
Depending on the version, PFEIFFER valves are supplied with theactuator and accessories already assembled on the valve.
The valve, actuator and accessories can also be supplied separately. If supplied separately, the valve, actuator and accessories
must be assembled together at the installation site.
The tasks are listed below that are necessary for assembly andprior to the commissioning.

DANGER
Risk of bursting due to improper opening of pressurised devices and components!
Pneumatic rotary actuators are pressure equipment that can burst
if handled improperly. Projecting, flying components and fragments can cause injuries or even death.
Ö Depressurise the concerned plant parts and the actuator. Also
residual energy must be discharged.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

NOTE
Damage to the actuator due to excessively high or low tightening torques!
The rotary actuator components must be tightened with specifictorques. Excessively tightened components are subject to increased wear. Components that are not sufficiently tightened cancause the components to release.
Ö Observe the tightening torques, see Chapter “15.1.1 Tightening torques”.
Damage to the actuator due to unsuitable tools!
Ö Only use tools approved by PFEIFFER, see Fig. 15-1 and Table 15-8 in Chapter “15.1.3 Tools“.
Damage to the actuator due to unsuitable lubricants!
Ö Only use lubricants approved by PFEIFFER, see Table 15-7 in
Chapter “15.1.2 Lubricants”.

5-1

Installation

5.3.1

Controls and connections

Info− All information necessary to assemble the actuator correctly
and safely on the valve, e.g.: dimensions, torque, air volume,
end position adjustment, response time, operating temperature,
direction of rotation are clearly marked on the type plate, on
the data sheet and /or the technical data sheets.

Tip
The assembly of the valve and actuator takes place according to
the signal range and direction of action of the actuator. This information is available on the type plate of the actuator, see
Chapter “2 Markings on the device”.

Fig.|5-1:

Connections

5.3.2

Assembling the valve and actuator

The rotary actuator can be assembled on the valve as follows:− Direct assembly of the rotary actuator directly on the valve interface.
− Assembly of a bracket and a coupling.
WARNING
Danger of damage and malfunction by exceeding the torquelimit value.
In consideration of the maximum tightening torque, maximum air
supply pressure and the maximum transmittable actuator torque,according to ISO 5211 the maximum transmissible tightening
torque may not exceed the torque limit in relation to the installed
ISO flange and the shaft connection.
Ö This information is available on the type plate of the actuator,
see “2 Markings on the device”.

NOTE
Damage due to incorrect fail-safe position!
When installing a single-acting actuator (with spring) with a defined fail-safe position, check that when the pneumatic or electricenergy fails the direction of rotation complies with the application (clockwise to close).

Info− Before assembling the actuator on a valve, make sure that theactuator turns in the required direction of rotation and that thevalve and actuator are correctly aligned with each other.

5-2

Fig.|5-2:

Valve assembly

Table|5-1: Components for valve assembly
Pos.

Designation

A

Rotary actuator

B

Valve

C

ConsoleD

Coupling

Direct assemblyÖ Insert the square drive, flat head drive or key drive of thevalve shaft directly into the actuator shaft of the rotary actuator (A).
Ö Fasten the rotary actuator (A) and valve (B) with the corresponding screws through the ISO flange. Observe the tightening torques, see “Table 15-5: Tightening torques on the
ISO connection “ in Chapter “15.1.1 Tightening torques”.
Assembly using a bracket
Ö Fasten the bracket (C) to the valve (B) with the corresponding
screws. Observe the tightening torques, see “Table 15-5:
Tightening torques on the ISO connection “ in Chapter“15.1.1 Tightening torques”.

EB 31a-22_EN
December 2021 edition
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Installation

Ö Plug the coupling (D) into the valve shaft.
Info
Make sure that the position indicator of the coupling matches theswitch position of the valve.

Ö Place the rotary actuator (A) on the bracket (C) and fasten
with the corresponding screws. Observe the tightening torques, see “Table 15-5 Tightening torques on the ISO connection” in Chapter “15.1.1 Tightening torques”.
WARNING
Danger and damage due to heavy actuator units!
Rotary actuators that are heavier than the weight of the valve canpose a danger to the user and cause damage in the pipe systemafter installation.
Ö These rotary actuators must be supported if they generate abending stress on the valve due to their size and/or installation situation.

NOTE
Damage to the valve due to the incorrect setting of the end
stops!
The actuating device is adjusted to the operating data specified
in the order.
Ö The adjustment of the “OPEN” and “CLOSED” end stops isthe responsibility of the user.

Table|5-2: Components for accessory assembly
Pos.

Designation

A

Rotary actuator

E

Position indicator

F

Limit switch / positioner

G

Solenoid valve

PFEIFFER rotary actuators can be controlled by directly assembled devices or remote control systems.
Therefore the rotary actuators have direct interfaces for the assembly of control and signalling devices (e.g. solenoid valves,
positioners, control boxes) and threaded connections for remotecontrol systems, see Fig. 5-3.
Ö Assembly and operating instructions, see the documentationfrom the control and signalling device manufacturer.
Assembling a solenoid valveÖ Before fastening a solenoid valve (G), check that the rotaryactuator is in its initial position (closed position, pistons retracted).
Ö For standard assembly and clockwise rotation to close, thegroove on the shaft or position indicator (E) must be in theclosed position, at a right angle to the longitudinal axis of therotary actuator (A).
Ö Fasten the solenoid valve (G) with suitable screws to the rotary actuator (A). Observe the tightening torques, see “Table
15-4: Tightening torques on the port (NAMUR)““ in Chapter“15.1.1 Tightening torques”.
Assembly of a limit switch / positioner

5.3.3

Assembling accessories

Ö Use suitable screws to fasten the switch cabinet (F) andbracket to the actuator (A). Observe the tightening torques,
see “Table 15-6: Tightening torques on the accessory connection“ in Chapter “15.1.1 Tightening torques”.
Assembling additional accessories
Additional accessories, such as air-sets, etc. can be installed on
the rotary actuator. For assembly details, see the respective instructions for the accessory.

5.4 Establishing the pneumatic connection
The BR 31a Edition 2020+ actuator operates with a 90° rotation
to “open” and “close” different types of valves.
Double-acting actuator (standard direction of rotation)

Fig.|5-3:

Assembling accessories
Fig.|5-4:

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Air supply “2”

Fig.|5-5:

Air supply “4”5-3

Installation− Supply air to port “2” moves the pistons in the direction of
the end positions, see Fig. 5-4. Air supply to port “4” requires a clockwise direction of rotation.
Ö Supply air to port “4” moves the pistons in the middle, seeFig. 5.5. Air supply to port “2” requires a clockwise directionof rotation.

Single-acting actuator (standard direction of rotation)

Fig.|5-6:

Air supply “2”

Fig.|5-7:

Loss of pressureÖ Supply air to port “2” moves the pistons in the direction of
the end positions, the springs are compressed, see Fig. 5-6.
Air supply to port “4” requires a clockwise direction of rotation.
Ö Loss of pressure (air supply failure) at port “2” allows the pistons to return to the initial position, see Fig. 5-7. Air supply toport “2” requires a clockwise direction of rotation.

5-4

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Start-up

6

Start-up

The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
DANGER
Risk of bursting due to improper opening of pressurised devices and components!
Pneumatic rotary actuators are pressure equipment that can burst
if handled improperly. Projecting, flying components and fragments can cause injuries or even death.
Before working on the actuator:
Ö Depressurise the concerned plant parts and the actuator. Also
residual energy must be discharged.

NOTE
Damage to the actuator due to excessively high or low tightening torques!
The rotary actuator components and additional equipment mustbe tightened with specific torques. Excessively tightened components are subject to increased wear. Components that are not sufficiently tightened can cause the components to release.
Ö Comply with tightening torques, see Chapter “15.1.1 Tightening torques”.
Damage to the actuator due to unsuitable tools!
Unsuitable tools can damage the actuator.
Ö Suitable tools are required to work on the actuator, see Figure15-1 and Table 15-8 in Chapter “15.1.3 Tools“.

WARNING
Danger of injury due to preloaded springs!
The rotary actuators are tensioned due to the compressed
springs. Furthermore, improper disassembly of the spring cartridge can lead to serious injuries.
Ö Opening of the rotary actuator only according to the instructions, see Chapter “11.1 Releasing the spring tension in theactuator“.
Danger of injury due to escaping exhaust air!
The actuator is pneumatically operated, therefore exhaust air escapes after it is controlled.
Ö When working near the actuator, wear eye and hearing protection.
Danger of crushing due to moving actuator- and switching
shaft!
Ö Before working on the actuator, interrupt and lock pneumaticenergy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects to hinder the operationof the actuator- and switching shaft.
Ö If the actuator- and switching shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see chapter “11.1 Releasing the spring
tension in the actuator”.
Danger of injury due to incorrect operation, use or installation
caused by incorrect information on the actuator!
After performing adjustment or conversion work, the data on theactuator type plate is no longer correct. This concerns, for example, the direction of action and the schematic representation of
the direction of action and actuator function.
Ö Immediately replace the signs or adhesives with incorrect/
outdated information.
Ö Enter the newly adjusted values on the type plate, or request
a new type plate from PFEIFFER.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Ensure the following conditions prior to commissioning/recommissioning:Ö In reference to the Machinery Directive 2006/46/EU, the actuators can be classified as a “part of a machine”. The commissioning of the actuator is also prohibited until the machine
and/or the final system in which the actuator is installed fulfils the requirements of directive 2006/46/EU and withwhich compliance is declared.
Ö The actuators are designed, built and classified in compliancewith ATEX Directive 2014/68/EU. Use in zones with a potentially explosive atmosphere must comply with the classification of the actuator and the ATEX safety regulations.
Ö It is important that the actuator is used only within the limits
of use permitted by the technical specifications.
Ö The actuator is installed properly on the valve, see Chapter“5 Assembly”.
Ö The function tests have been completed successfully.
Ö The current conditions in the concerned plant section correspond to the design of the actuator, see Intended use in
Chapter “1 Safety instructions and safety measures”.

Commissioning/recommissioningÖ Check the correct function of the actuator.

6-1

Start-up

6-2

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Operation

7

Operation

The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
WARNING
Danger of injury due to preloaded springs!
The rotary actuators are tensioned due to the compressed
springs. Furthermore, improper disassembly of the spring cartridge can lead to serious injuries.
Ö Opening of the rotary actuator only according to the instructions, see Chapter “11.1 Releasing the spring tension in theactuator“.
Danger of injury due to escaping exhaust air!
The actuator is pneumatically operated, therefore exhaust air escapes after it is controlled.
Ö When working near the actuator, wear eye and hearing protection.

The rotary actuator can be operated after connection to the supply line and adjustment of the rotation angle.
Single-acting rotary actuators with spring return are operated byan air stroke or spring stroke by pressurising or ventilating theconnection openings.
With double-acting rotary actuators, the connection openings forthe stroke must be pressurised and ventilated alternately for the
stroke, see Chapter “5.4 Establishing the pneumatic connection”.
Ö Select the accessories, operating elements, pipes and screw
connections such that they do not restrict the flow or cause alarge pressure drop that affects the performance of the rotaryactuator.
Info
If the plant specifications require a supply air pressure for the rotary actuator that is lower than the maximum supply air pressure
specified on the actuator type plate, mark the rotary actuatorwith the reduced supply air pressure (e.g. “max. supply air pressure limited to ... bar”).

Danger of crushing due to moving actuator- and switching
shaft!
Ö Before working on the actuator, interrupt and lock pneumaticenergy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects to hinder the operationof the actuator- and switching shaft.
Ö If the actuator- and switching shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see chapter “11.1 Releasing the spring
tension in the actuator”.
Danger of injury due to incorrect operation, use or installation
caused by incorrect information on the actuator!
After performing adjustment or conversion work, the data on theactuator type plate is no longer correct. This concerns, for example, the direction of action and the schematic representation of
the direction of action and actuator function.
Ö Immediately replace the signs or adhesives with incorrect/
outdated information.
Ö Enter the newly adjusted values on the type plate, or request
a new type plate from PFEIFFER.

7.1 Actuator operation
Ö If required, after commissioning and reaching the operating
temperature, tighten all connections, see Chapter “15.1.1
Tightening torques”.
Ö The valve/actuator unit must be actuated with the control signals.
Info
Valves that were delivered from the factory with an actuator are
precisely adjusted. The user is responsible for any changes theymake.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

7-1Operation

7-2

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Malfunction

8

Malfunction

When rectifying the faults, chapter “1 Safety instructions and safety measures” must be observed.

8.1 Detecting and rectifying errors
Type of fault
The actuator shaft does not
move even if requested.

Uneven rotation

Incomplete rotation

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Possible cause

Measures

The actuator is mechanically
blocked.

Check the installation.
Remove the blockage, see Chapter “1 Safety instructions and safety measures”.
WARNING!
A blocked actuator shaft (e.g. due to “seizure” if not actuated for a long period oftime) can release unexpectedly and move uncontrolled. This can lead to crushing if
reaching into them.
Before trying to release a blockage of the actuator shaft, interrupt and lock thepneumatic energy and the control signal. Release the residual energy from theactuator (spring tension) before freeing the blockage, see chapter “11.1 Releasing
the spring tension in the actuator“.

The signal pressure is not
sufficient.

Check the signal pressure.
Check the signal pressure line for leaks.

Signal pressure not connectedto the correct port (“2“ or “4”).

Connect the signal pressure, see Chapter “5.4 Establishing the pneumaticconnection”

Defective pistons or seals in theactuator.

Disassemble the rotary actuator, lubricate all sliding parts, see chapter “1 Safety
instructions and safety measures”.
Replace the pistons and seals, see Chapter “12.1 Replacing defective components”

The signal pressure is not
sufficient

Check the supply system and ensure the correct signal pressure.

Lack of lubricant

Disassemble the rotary actuator, lubricate all sliding parts, see chapter “1 Safety
instructions and safety measures”.
For the recommended lubricant, see Chapter “15.1.2 Lubricant”
For the required repair instructions, see Chapter “12 Repairs”.

Worn components

Repairs are necessary.
Disassemble the rotary actuator, see chapter “1 Safety instructions and safetymeasures”.
Request spare parts from PFEIFFER Chemie-Armaturenbau GmbH, see Chapter“15.2 Spare parts and wear parts”.
For the required repair instructions, see Chapter “12 Repairs”.

Control system

Check the correct assembly of the control system components.
Check the control system documentation and contact the manufacturer.

Defective valve

Disconnect the connection to the control pressure.
Remove the actuator from the valve (observe the “Safety instructions and safetymeasures”, see the included valve manuals).
Check the valve documentation and contact the manufacturer.

Incorrect end position
adjustment

Observe the notes for the correct end position adjustment, see Chapter “3.14.6 End
position adjustment for the standard actuator”.

Foreign material inside

Disassemble the rotary actuator, see chapter “1 Safety instructions and safetymeasures”.
Remove any foreign material.
For the required repair instructions, see Chapter “12 Repairs”.

Incorrect assembly after
maintenanceDisassemble the rotary actuator, see chapter “1 Safety instructions and safetymeasures”.
Assemble the rotary actuator correctly.
For the required repair instructions, see chapter “3.14 Rotary actuator assembly”
and “12 Repairs”.

Control system

Check the correct assembly of the control system components.
Check the control system documentation and contact the manufacturer.

Defective valve

Disconnect the connection to the control pressure.
Remove the actuator from the valve (observe the “Safety instructions and safetymeasures”, see the included valve manuals).
Check the valve documentation and contact the manufacturer.

8-1

Malfunction

Type of fault
Loss of power

Possible cause
Signal pressure too low

MeasuresCheck the control system,
Ensure a correct supply pressure.

Supply line blocked, crushed or Check the pipes and fittings.
leaky
Remove foreign matter/damaged components.
Leakage in the rotary actuator
seals

Disassemble the rotary actuator, see chapter “1 Safety instructions and safetymeasures”.
Replace the seals, see Chapter “12.1 Replacing defective components”

Blocked exhaust opening

Remove plugs or foreign matter from the exhaust opening.

Defective valve

Disconnect the connection to the control pressure.
Remove the actuator from the valve (observe the “Safety instructions and safetymeasures”, see the included valve manuals).
Check the valve documentation and contact the manufacturer.

Info− In the case of faults that are not listed in the table, contact theAfter Sales Service at PFEIFFER.
− Spare parts must be ordered indicating all the data according
to the actuator marking. Only original parts from PFEIFFER
Chemie-Armaturenbau GmbH may be installed.

8.2 Carrying out emergency measures
The system operator is responsible for emergency measures.

8-2

EB 31a-22_EN
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Subject to technical changes

Servicing

9Servicing

The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
The following documents are required in addition for the maintenance of the ball valve:− Corresponding EB for the installed valve.
DANGER
Risk of bursting due to improper opening of pressurised devices and components!
Pneumatic rotary actuators are pressure equipment that can burst
if handled improperly. Projecting, flying components and fragments can cause injuries or even death.
Ö Depressurise the concerned plant parts and the actuator. Also
residual energy must be discharged.

WARNING
Danger of injury due to preloaded springs!
The rotary actuators are tensioned due to the compressed
springs. Furthermore, improper disassembly of the spring cartridge can lead to serious injuries.
Ö Opening of the rotary actuator only according to the instructions, see Chapter “11.1 Releasing the spring tension in theactuator“.
Danger of injury due to escaping exhaust air!
The actuator is pneumatically operated, therefore exhaust air escapes after it is controlled.
Ö When working near the actuator, wear eye and hearing protection.
Danger of crushing due to moving actuator- and switching
shaft!
Ö Before working on the actuator, interrupt and lock pneumaticenergy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects to hinder the operationof the actuator- and switching shaft.
Ö If the actuator- and switching shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see chapter “11.1 Releasing the spring
tension in the actuator”.
Danger of injury due to incorrect operation, use or installation
caused by incorrect information on the actuator!
After performing adjustment or conversion work, the data on theactuator type plate is no longer correct. This concerns, for example, the direction of action and the schematic representation of
the direction of action and actuator function.
Ö Immediately replace the signs or adhesives with incorrect/
outdated information.
Ö Enter the newly adjusted values on the type plate, or request
a new type plate from PFEIFFER.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

NOTE
Damage to the actuator due to excessively high or low tightening torques!
The rotary actuator components and additional equipment mustbe tightened with specific torques. Excessively tightenedcomponents are subject to increased wear. Components that are
not sufficiently tightened can cause the components to release.
Ö Comply with tightening torques, see Chapter “15.1.1
Tightening torques”.
Damage to the actuator due to unsuitable tools!
Unsuitable tools can damage the actuator.
Ö Suitable tools are required to work on the actuator, see Figure15-1 and Table 15-8 in Chapter “15.1.3 Tools“.
Damage to the ball valve due to unsuitable lubricants!
Unsuitable lubricants can corrode and damage the surface.
Ö The actuator material requires suitable lubricants, see Table
15-7 in Chapter “15.1.2 Lubricants”.

Info
The actuator was checked by PFEIFFER prior to delivery.
− If maintenance and repair work is performed without approval
from the After Sales Service of PFEIFFER, the product guarantee
will be voided.
− Only use original parts from PFEIFFER as spare parts that
correspond to the original specification.

9.1 Periodic tests
Depending on the conditions of use, the actuator must be
checked at defined intervals in order to take remedial measuresprior to possible malfunctions. The plant operator is responsible
for preparing a suitable test plan.
Tip
After Sales Service can provide you with support for creating atest plan specific to your plant.

9.2 Preparing for maintenance andconversion workÖ Get the material and tools ready that are required for thework.
Ö Decommission the rotary actuator, see chapter “10 Decommissioning”.
Ö Disassemble the rotary actuator from the valve, see Chapter“11.2 Disassembling the actuator”.
Ö With preloaded actuators, release the spring tension, seechapter “11.1 Releasing the spring tension in the actuator“.

9-1Servicing

Ö Unscrew the screws on the end cap and put them down to theside.
After the preparation, the maintenance and/or conversion work
can be carried out.

9.3 Assembling the valve after maintenanceand conversion workÖ Assemble the actuator, see Chapter “5 Assembly”.
Ö Adjust the upper and lower signal range, see Chapter “6Commissioning”.

Fig.|9-2:

Disassembling the adjusting screws

Ö Remove the seals (11).

9.4 Maintenance workÖ Disassemble one end cap after the other.

Ö Under normal operating conditions, only a periodic check toensure proper functioning is necessary.

Ö Disassemble the end cap screws (13).

Ö Depending on the operating and ambient conditions, maintenance can be necessary between 500,000 and 1,000,000
cycles.

Ö Disassemble the end cap screws (13) according to the orderof the disassembly sequence, see Fig. 9-4.
Ö For single-acting actuators, remove the spring cartridge (17).

Ö Spare part kits for maintenance (replacement of seals andbearings) are available, see Chapter “15.2 Spare parts andwear parts”.

9.5 Conversion work
See “Fig. 3-3: Exploded drawing of the rotary actuator version
Edition 2020+” in Chapter “3 Design and principle of operation”.
Ö Move the actuator to the fail-safe position so that the springs
are released.

Fig.|9-3:

Disassembling the end cap

Fig.|9-4:

Disassembling the end cap screws

Ö Remove the screw (24).
Ö Remove the position indicator (19) from the end of the shaft,and use a screwdriver as a lever if necessary.

Fig.|9-1:

Disassembling the position indicator

Remove both adjusting screws (2) with washers (4) and locknuts (3).

9-2

Ö Release the spring compression. Unscrew each end cap
screw (13) one rotation each according to the order shown in
Fig. 9-4 and the number of rotations specified in Table 9-1.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Servicing.

WARNING

Danger of damage to components due to incorrect disassembly!
During disassembly, the compressed springs can be damaged
due to the uneven application of force.
Ö When disassembling the end cap screws, observe the order,
see Fig. 9-4.
Ö When disassembling the end cap, maintain a constant distance (A = B) between the actuator housing and the housing
interface, see Fig. 9-3.

Ö Press both pistons (25) into the housing (29) at the same time
until the pistons are engaged and turn the housing until thetravel end is reached.

Fig.|9-6:

Assembling the pistonsFig.|9-7:

Assembling the pistons

Table|9-1: Number of rotations
DAP/SRP rotary actuator

Number of screw rotations (13)

60
100
150
220
300

5 ... 7 Rotations

450
600
900
1200

WARNING

Check that the pistons in the end position turn the shaft 4° overthe middle line (0°), see Fig. 9-8.

Danger of injury due to defective springs!
The end caps are tensioned when the springs are compressed.
If after unscrewing the screws (13) with the number of rotations
specified in Table 9-1 force is still applied on the end caps (23and 23), the spring cartridge is possibly damaged or the pistons
are not completely closed.
Ö Stop disassembly and contact PFEIFFER.

Ö Remove the end cap seal (14).
Ö Clamp the housing (29) in a vice or similar device, turn theshaft (30) until the pistons (25) are accessible.

Fig.|9-5:

Fig.|9-8:

Piston end position

Ö In the case of single-acting actuators, insert the spring
cartridge in the end cap.

Disassembling the pistonÖ Both pistons (25) are turned 180° in the axial direction andreassembled.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Fig.|9-9:

Assembling the spring cartridges

9-3Servicing

Ö Insert the end cap seal (14) in the groove of both end caps
(22 and 23).

Fig.|9-12: Assembling the position indicator
Fig.|9-10: Assembling the end cap screws

Ö Tighten the screw (24).
NoteDanger of damage to components due to incorrect assembly!
When reinstalling, the end cap can be damaged due to an
uneven application of force of the compressed springs.
Ö Assemble the end cap and maintain a constant distance(A = B) between the rotary actuator housing and the housing
interface, see Fig. 9-10.
Ö Observe the installation sequence, see Fig. 9-11.

Ö Attach a new type plate to the actuator with the changed
direction of action.

9.6 Ordering spare parts and consumables
Information about spare parts, lubricants and tools can bereceived from the After Sales Service at PFEIFFER.
Spare parts
Information on spare parts can be found in Chapter “15.2 Wearparts and spare parts“.
Lubricant
For information on suitable lubricants, see Chapter “15-7:
Recommended lubricants” in Chapter “15.1.2 Lubricants”.
Tools
For information on suitable tools, see “Fig. 15-1: Tools“. and“Table 15-8 Tool dimensions” in Chapter “15.1.3 Tools“.

Fig.|9-11: Assembling the end cap screws

Ö Assemble the end cap on the housing (29).
Ö Make sure that the o-rings lie in the grooves.
Ö Complete tightening the screws (13), tighten each screw inthe indicated order one rotation each, see Fig. 9-11.
Ö Tightening torques, see “15.1.1 Tightening torques”.
Ö Insert both adjusting screws (2), lock nuts (4), washers (3)and seals (11).
Ö Screw the adjusting screws (2) into the housing, observe theend position adjustment.
Ö Place the position indicator (19) on the shaft and pay
attention to the correct position.

9-4

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Decommissioning

10 Decommissioning
The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
DANGER
Risk of bursting due to improper opening of pressurised devices and components!
Pneumatic rotary actuators are pressure equipment that can burst
if handled improperly. Projecting, flying components and fragments can cause injuries or even death.
Before working on the actuator:
Ö Depressurise the concerned plant parts and the actuator. Also
residual energy must be discharged.

Info− Before any disassembly work is performed, it is important tomake sure that the actuator is not pressurised and the springs
are released in the end position.
− Always proceed with caution and check again that ports 2 and
4 are vented and all accessories or devices have been removed.
− In the case of a single-acting actuator, makes sure prior to disassembly that the actuator is in the start position and the pistons are fully retracted.

WARNING
Danger of injury due to preloaded springs!
The rotary actuators are tensioned due to the compressed
springs. Furthermore, improper disassembly of the spring cartridge can lead to serious injuries.
Ö Opening of the rotary actuator only according to the instructions, see Chapter “11.1 Releasing the spring tension in theactuator“.
Danger of injury due to escaping exhaust air!
The actuator is pneumatically operated, therefore exhaust air escapes after it is controlled.
Ö When working near the actuator, wear eye and hearing protection.
Danger of crushing due to moving actuator- and switching
shaft!
Ö Before working on the actuator, interrupt and lock pneumaticenergy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects to hinder the operationof the actuator- and switching shaft.
Ö If the actuator- and switching shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see chapter “11.1 Releasing the spring
tension in the actuator”.

To decommission the actuator for maintenance and repair workor for disassembly, perform the following steps:
Ö Decommission the valve, see the corresponding valve documentation.
Ö Shut off the pneumatic power and lock it, to depressurise theactuator.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

10-1Decommissioning

10-2

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Removal

11 Removal
The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
DANGER
Risk of bursting due to improper opening of pressurised devices and components!
Pneumatic rotary actuators are pressure equipment that can burst
if handled improperly. Projecting, flying components and fragments can cause injuries or even death.
Before working on the actuator:
Ö Depressurise the concerned plant parts and the actuator. Also
residual energy must be discharged.

WARNING
Danger of injury due to preloaded springs!
The rotary actuators are tensioned due to the compressed
springs. Furthermore, improper disassembly of the spring cartridge can lead to serious injuries.

Ö Before starting work on the rotary actuator, disconnect all
pneumatic, hydraulic and electrical supply lines.
Ö Depressurise the rotary actuator.
Ö When disassembling the end cap, bring the rotary actuatorto the “closed” (0°) position and remove the fastening screws
correctly.
Ö Disassemble one end cap after the other.
.

WARNING

Danger of damage to components due to incorrectdisassembly!
During disassembly, the compressed springs can be damaged
due to the uneven application of force.
Ö When disassembling the end cap screws, observe the order,
see Fig. 11-1.
Ö When disassembling the end cap, maintain a constantdistance (A = B) between the actuator housing and the
housing interface, see Fig. 11-2.

Open the rotary actuator only according to the instructions, see
Chapter “11.1 Releasing the spring tension in the actuator”.
Danger due to escaping exhaust air!
The actuator is pneumatically operated, therefore exhaust air
escapes after it is controlled.
Ö When working near the actuator, wear eye and hearing
protection.
Danger of crushing due to moving actuator- and switching
shaft!
Ö Before working on the actuator, interrupt and lock pneumaticenergy and the control signal.
Ö Vent the actuator.
Ö Do not allow the jamming of objects to hinder the operationof the actuator- and switching shaft.
Ö If the actuator- and switching shaft are blocked (e.g. due to“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before releasing the blockage, see Chapter 11.1 Releasing the spring
tension in the actuator”.

Fig.|11-1: Disassembling the end cap screws

Prior to disassembly, make sure that the following conditions aremet:− The actuator is decommissioned, see chapter “10 Decommissioning”.

Fig.|11-2: Disassembling the end cap

11.1 Releasing the spring tension in theactuator

Ö Release the spring compression. Unscrew each end cap
screw (13) one rotation each according to the order shown in
Fig. 11-1 and the number of rotations specified inTable 11-1.

The end caps (22 and 23) are tensioned due to the compressed
springs. Furthermore, improper disassembly of the spring cartridge can lead to serious injuries.

EB 31a-22_EN
December 2021 edition
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11-1Removal

Table|11-1: Number of rotations
Rotary actuator
DAP / SRP

Disassemble the rotary actuator (A) from the valve (B) as follows:
Number of screw rotations (13)Ö Disconnect the electrical/pneumatic/hydraulic energy supply
from the rotary actuator.

60100

Ö Vent the actuator.

150
220
300

Ö Do not endanger the plant.

5 ... 7 Rotations450

Ö If available, disconnect the electrical wiring for the control orsignalling devices, see the documentation from the respective
control or signalling device manufacturer.

600
900

To disconnect the actuator and valve, two assembly variations
must be observed.

1200

Disassembly in the case of direct assemblyÖ Loosen the screws on the ISO flange.

WARNING
Danger of injury due to compressed springs!
The end caps are tensioned when the springs are compressed.
If after unscrewing the screws (13) with the number of rotations
specified in Table 11-1 force is still applied on the end caps (23and 23), the spring cartridge is possibly damaged or the pistons
are not completely closed.
Ö Stop disassembly and contact PFEIFFER.
Ö Do not disassemble an individual spring cartridge.
Ö Contact PFEIFFER to service the spring cartridges.

Ö Disconnect the rotary actuator (A) and valve (B).
Insert the square drive, flat head drive or key drive of the valve
shaft directly into the actuator shaft of the actuator.
Ö Release and remove the components.
Disassembling in the case of assembly using a bracket
Ö Release the screws fixing the rotary actuator (A) to thebracket (C).
Ö Separate the rotary actuator (A) from the bracket (C).
Ö Release and remove the coupling (D) from the valve shaft.

11.2 Disassembling the actuatorÖ If necessary, release the screws fixing the valve (A) to thebracket (C).
Ö Separate the bracket from the valve.

Fig.|11-3: Disassembling the valve
Table|11-2:
Table|11-3: Components for valve disassembly

11-2

Pos.

Designation

A

Rotary actuator

B

Valve

C

ConsoleD

Coupling

EB 31a-22_EN
December 2021 edition
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Repairs

12 Repairs

12.1.2 Remove the adjusting screws

If the operation of the rotary actuator is no longer compliant or if
it does not work at all, it is defective and must be repaired or
replaced.

(see Fig. 12-2 and Fig. 12-6)

NOTE

Ö Remove the lock nuts (3) with washers (4).
Ö Remove the seals (11) and replace them when replacing
spare parts.
Ö Unscrew both adjusting screws (2) to their stopping point.

Damage to the actuator due to improper maintenance andrepair!
Ö Do not perform maintenance and repair work on your own.
Ö Contact the After Sales Service at PFEIFFER for maintenanceand repair work.

In special cases, certain maintenance and repair work may be
performed.
The work described in this chapter may only be performed by
specialist personnel qualified to perform the corresponding task.
For decommissioning and disassembly, observe Chapter “10Decommissioning” and Chapter “11 Disassembly”.

12.1 Replacement of defective components
If it is necessary to disassemble the actuator for repair:Ö Remove the rotary actuator from the valve.
Ö Remove accessories at the upper pneumatic connection.
Notes from the instructions for the respective additional
equipment.

Fig.|12-2: Disassembling the adjusting screws

Info
For final disassembly, the end caps (22 and 23) as well as thepiston (25) must be disassembled beforehand, as the adjustingscrews can only be removed from inside the actuatorÖ Carry out the disassembly of the adjusting screws according
to Chapter “12.1.4 End cap disassembly” and Chapter“12.1.5 Piston disassembly”.

The disassembly of the rotary actuator is described below. In thisway, defective components can be reached and replaced.

12.1.3 End cap disassembly
12.1.1 Removing the position indicator(see Fig. 12-3, Fig. 12-4 and Fig. 12-6)(see Fig. 12-1 and Fig. 12-6)

Ö Disassemble one end cap after the other.
Ö Disassemble the end cap screws (13) according to the orderof the disassembly sequence, see Fig. 12-3.
.

Fig.|12-1: Disassembling the position indicator

WARNING

Danger of damage to components due to incorrect disassembly!
During disassembly, the compressed springs can be damaged
due to the uneven application of force.
Ö When disassembling the end cap screws, observe the order,
see Fig. 12-3.
Ö When disassembling the end cap, maintain a constant distance (A = B) between the actuator housing and the housing
interface, see Fig. 12-4.

Ö Remove the screw (24).
Ö Remove the position indicator (19) from the end of the shaft,and use a screwdriver as a lever if necessary.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

12-1Repairs

WARNING
Danger of injury due to defective springs!
The end caps are tensioned when the springs are compressed.
If after unscrewing the screws (13) with the number of rotations
specified in Table 12-1 force is still applied on the end caps
(22 and 23), the spring cartridge is possibly damaged or the pistons are not completely closed.
Ö Stop disassembly and contact PFEIFFER.

Ö Remove the end cap (22 and 23)
Ö Remove the end cap seal (14) and replace when replacing
spare parts.

Fig.|12-3: Disassembling the end cap

12.1.4 Piston disassembly(see Fig. 12-5 and Fig. 12-6)

Fig.|12-4: Disassembling the end cap

Fig.|12-5: Disassembling the piston

Ö Release the spring compression. Unscrew each end cap
screw (13) one rotation each according to the order shown in
Fig. 12-3 and the number of rotations specified inTable 12-1.

Ö Turn the shaft (30) until the pistons (25) are accessible.
WARNING
Danger of injury due to incorrect disassembly!
Do not use compressed air to remove the pistons from the housing (projectile impact).

Table 12-4: Number of rotations
Rotary actuator
DAP / SRPÖ Clamp the housing (29) in a vice or similar device.

Number of screw rotations (13)100

Ö Remove the piston bearings (16) carefully using a screwdriver.

150

Ö Remove the piston bearing (5) and piston bearings (15).

60

220
300

5 ... 7 Rotations

450
600
900
1200

Ö For single-acting actuators, remove the spring cartridge (17).

12-2

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Repairs

Fig.|12-6: Exploded drawing of the rotary actuator version after 2020+

Table 12-1: Parts list
Item

Designation

Item

Designation1

Cam (end position adjustment)

16

O-ring2

Adjusting screw

17

Spring cartridge

3

Lock nut

18

Retaining ring

4

Washer19

Position indicator

5

Bearing (piston back)20

Shaft seal (bottom)

6

Shaft bearing bushing (top)21

Shaft seal (top)7

Shaft bearing bushing (bottom)

22

End cap (right)

8

Thrust bearing

23

End cap (left)

9

Plug (to seal air port)

24

Screw (position indicator)10Supporting ring25

Piston11

Seal (adjusting screw)

26

Type plate

12

Piston guide27Type plate (end cap)

13

Screw (end cap)

28

Spigot14

End cap seal

29

Housing

15

Bearing (piston head)

30

Shaft

EB 31a-22_EN
December 2021 edition
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12-3Repairs

12.1.5 Shaft disassembly

12.3 Sending devices to PFEIFFER(see Fig. 12-7 and Fig. 12-6)

Defective actuators can be sent to PFEIFFER for repair.
Proceed as follows to send devices:Ö Include the following information for returns:− Actuator type− Size− Number of springs− Fail-safe position− Supply air− Number of actuations (year, month, week or day)
− VDI/VDE bracket

Fig.|12-7: Disassembling the shaft

Ö Use pliers for circlips to carefully remove the spring clip (18).

Tip
PFEIFFER recommends documenting the following contamination
data in the form FM 8.7-6 “Declaration regarding the contamination of PFEIFFER valves and components”.

Ö Remove the thrust bearing (8) and thrust washer (10).
Ö Push down with light pressure on the top of the shaft (30) until it is possible to remove the cam (1) and the internal thrustbearing (8).
Ö Pull the shaft (30) completely out of the housing.
Tip
If the shaft cannot be removed by hand, gently tap the top of the
shaft with a plastic mallet to drive it out.

Ö Remove the top and bottom shaft bearings (6 and 7).
Ö Remove the top and bottom seals (20 and 21).
Ö Replace the bearing bushings (6 and 7), internal and external thrust bearing (8), as well as the seals (20 and 21) whenreplacing the spare parts.
Info
Thoroughly clean all disassembled and non-replaced parts andcheck for wear prior to assembly.
Ö Assemble the actuator as described in Chapter “3.1.4 Rotaryactuator assembly”.

12.2 Additional repairs
Ö In the case of additional major damage, it is recommended
to have repairs performed by PFEIFFER.

12-4

EB 31a-22_EN
December 2021 edition
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Disposal

13 Disposal
Ö For disposal, observe the local, national and international
regulations.
Ö Do not dispose of old components, lubricant and hazardous
materials with domestic waste.

EB 31a-22_EN
December 2021 edition
Subject to technical changes

13-1Disposal

13-2

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December 2021 edition
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Certificates

14 Certificates
The declarations of conformity are available on the following
page:− Declaration of conformity in compliance with the EU
Machinery Directive 2006/42/EU, see page 14-2.
− Declaration of conformity in compliance with the ATEX
Directive 2014/34/EU, see page 14-2.
− Declaration of conformity in compliance with the Pressure
Equipment Directive 2014/68/EU (PED), see page 14-2.

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December 2021 edition
Subject to technical changes

14-1

Certificates

14-2

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Certificates

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December 2021 edition
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14-3Certificates

14-4

EB 31a-22_EN
December 2021 edition
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Annex

Table|15-3: Tightening torques for nuts (104) for the additional
travel limit (102)15 Annex
15.1 Tightening torques, lubricant and tools

Rotary actuator
DAP / SRP

ThreadTightening torque
in Nm

M8

18 => 20M10

34 => 36M12

60 => 64M14

96 => 102

00900

M16

80 => 86

01200

M20

160 => 170

00060

15.1.1 Tightening torques

00100

Info
− All tightening torques are indicated in Nm.
− Tightening torque tolerance: ±10%.
− The tightening torques are based on a friction coefficient of
0.12 with a lubricated thread of the fastening elements (screws
or nuts).
− After long operating times or use at temperatures above 80°C,
the breakaway torque can be considerably higher.

00150
00220
00300
00450
00600

Table|15-1: Tightening torque of the end caps (13)
Rotary actuator
DAP / SRP

ThreadTightening torque
in Nm

00060
M6

Rotary actuator
DAP / SRP

ThreadTightening torque
in Nm

M5

4 => 5

7 => 8

00100

00060

00150

00100
M8

18 => 20

00220

00150

00300

00220
M10

34 => 36

00450

00300

00600

00450
M12

60 => 64

00900
01200

Table|15-4: Tightening torque on the port (NAMUR)

00600
M14

96 => 102

00900
01200

Table|15-2: Tightening torques for nuts (4) for the adjustingscrews (2)Table|15-5: Tightening torques on the ISO connection
Rotary actuator
DAP / SRP

ThreadTightening torque
in Nm

00060
M8
M10

34 => 36

00220
M12

DIN ISO
Connection

ThreadTightening
torque
in Nm

00060

F05

M6

10 => 11F07

M823 => 25F10

M1048 => 52F12

M1282 => 86F14

M16

200 => 210

18 => 20

00100
00150

Rotary actuator
DAP / SRP

60 => 64

00100
00150

00300

00220

00450

00300

M14

96 => 102

00600

00450

00900

M16

150 => 160

00600

01200

M20

290 => 310

00900
01200

EB 31a-22_EN
December 2021 edition
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15-1Annex

Table|15-6: Tightening torques on the accessory connection
Rotary actuator
DAP / SRP

Accessory connection

Tightening
torquein Nm

Thread

00060
00100

AA1

M5

4 => 5

00150
00220
00300
AA2

M5

4 => 5

00450
00600
00900
AA4

M5

4 => 5

Table|15-8: Tool dimensions
Rotary actuator
DAP/SRP

d

SW 1

SW 2

SW 3

SW 4

00060

22

13

13

10

4

00100

25

13

13

10

4

00150

26

17

17

13

5

00220

36

19

19

13

6

00300

38

19

19

17

6

00450

45

22

22

17

6

00600

48

22

22

19

6

00900

52

24

24

19

8

01200

58

30

30

22

10

01200

15.2 Spare and wear parts

15.1.2 Lubricant
The actuators are delivered lubricated for the service life of theactuator. The standard lubricant is approved for a temperature
range from -40 °C (-40 °F) to +80 °C (+176 °F). For low (SLT)and high (HT) temperatures, a special lubricant is required.
Please contact PFEIFFER.
For lubricants recommended for the rotary actuators when used
under standard conditions:

PFEIFFER recommends wear part sets for “Commissioning” andfor “2-year operation”.
The recommended spare parts for the standard, high temperatureand low temperature actuators of the BR 31a Edition 2020+ are
listed in the following Chapter 15.2.1.
The corresponding wear part sets can also be found in Chapter“15.2.2 Wear part sets for rotary actuator DAP/SRP 00060 to
01200”.

Table|15-7: Grease recommendation
Manufacturer

GreaseTennex

TS 2066/2

15.1.3 Tools
Suitable tools are required to work on the rotary actuator. Unsuitable tools can damage the actuator.

Fig.|15-1: Tool dimensions

15-2

EB 31a-22_EN
December 2021 edition
Subject to technical changes

Annex15.2.1 Spare parts for rotary actuator DAP/SRP 00060 to 01200 (rotation angle 0° to 90)

Fig.|15-2: Sectional drawing of the rotary actuator DAP/SRP 00015

Table|15-9: Recommended spare parts for rotary actuator DAP/SRP 00015.

1)

Pos.

Quantity

Description

Material

1

1

Cam

Stainless steel22Adjusting screw

Stainless steel

3

2

Washer

Stainless steel

42

Lock nut

Stainless steel

5 1)

2

Bearing (piston back)

PA46

6 1)

1

Shaft bearing bushing

PA46

7 1)

1

Shaft bearing bushing

PA46

8 1)

2

Thrust bearing

PA46

9 1) 2) 3)

2Plug (to seal air port)

SiliconStainless steel

101

Supporting ring11 1) 2) 3)

2

Seal

M-NBR

12

2

Piston guide

PA66+GF

13

8

Screw (end cap)

Stainless steel

14 1) 2) 3)

2

End cap seal

M-NBR

15 1) 2)2

Bearing (piston head)POM

16 1) 2) 3)

2

O-ring

M-NBR

17

5 to 12

Spring cartridge

Si Cr epoxy coated spring steel alloy

18

1

Retaining ring

Spring steel, ENP

19

1

Graduated collar

PA66+GF(+CB)

19a1

Position indicator

PA66+GF+CB

19b

1

Shaft adapter

Anodised, extruded aluminium alloy

19c

2

Grub screw for shaft adapter

Stainless steel

20 1) 2) 3)

1

Shaft seal

M-NBR

21 1) 2) 3)

1

Shaft seal

M-NBR

22

2

End cap

Anodised and coated die-cast aluminium alloy

24

1

Screw

PA66+GF+CB

25

2

PistonAnodised die-cast aluminium alloy

26

1

Type plate

Polyester silver

27

1

Sign

Polyester28

1

SpigotAnodised, extruded aluminium alloy

29

1

Housing

Coated, extruded aluminium alloy

30

1

Shaft

Contained in the wear part set (STD)

EB 31a-22_EN
December 2021 edition
Subject to technical changes

2)

Contained in the high temperature set (HT)Steel, ENP
3)Contained in the low temperature set (SLT) 4) per side
15-3

Annex15.2.2 Wear part sets for rotary actuator DAP/SRP 00060 to 01200
Table|15-10: Wear part sets
Rotary actuator

Wear part sets

DAP/ SRP

Standard (STD)High temperature (HT)Low temperature (SLT)

00060

43720v

45435v

48023v

00100

43721v

45436v

48024v

00150

43722v

45437v

48025v

00220

43728v

45438v

48026v

00300

43724v

45181v

48027v

00450

43725v

45439v

48028v

00600

43726v

45440v

48029v

00900

43356v

45441v

48030v

01200

43727v

44166v

48031v

15.2.3 Springs Edition 2020+
Module: Green or
natural-coloured

15.3 Service
For maintenance and repair work as well as malfunctions or defects, contact the After Sales Service at PFEIFFER for support.
E-mailThe After Sales Service can be reached at the e-mail address“sales-pfeiffer-de@samsongroup.com”.
Necessary data
Provide the following information in the case of questions and fortroubleshooting:Fig.|15-3: DAP/SRP spring− Actuator type− Size− Number of springs− Fail-safe position− Supply air− Number of actuations (year, month, week or day)Further information
The indicated <data sheets> and further information is available,
also in English, at the following address:

PFEIFFER Chemie-Armaturenbau GmbH
Hooghe Weg 41 • 47906 Kempen • Germany
Phone: +49 2152 2005-0 • Telefax +04 2152 1580
E-Mail: sales-pfeiffer-de@samsongroup.com
Internet: www.pfeiffer-armaturen.com

15-4

EB 31a-22_EN
December 2021 edition
Subject to technical changes

EB 31a-22_EN
December 2021 edition
Subject to technical changes

PFEIFFER Chemie-Armaturenbau GmbH
Hooghe Weg 41 · 47906 Kempen · Germany
Phone: +49 2152 2005-0 · Fax: +49 2152 1580
E-Mail: sales-pfeiffer-de@samsongroup.com · Internet: www.pfeiffer-armaturen.com

EB 31a-22_EN
December 2021 edition
Subject to technical changes