EB 8310-1 EN
Translation of original instructions

Type 3271 Pneumatic Actuator

Type 3271-5 (120 cm²)
Type 3277-5 (120 cm²)
Pneumatic Actuators
Edition November 2022

Type 3277 Pneumatic Actuator

Note on these mounting and operating instructions
These mounting and operating instructions assist you in mounting and operating the device
safely. The instructions are binding for handling SAMSON devices. The images shown inthese instructions are for illustration purposes only. The actual product may vary.
Î For the safe and proper use of these instructions, read them carefully and keep them forlater reference.
Î If you have any questions about these instructions, contact SAMSON‘s After-sales Service(aftersalesservice@samsongroup.com).

Documents relating to the device, such as the mounting and operating
instructions, are available on our website at www.samsongroup.com >Downloads > Documentation.

Definition of signal words! DANGER
Hazardous situations which, if not avoided,
will result in death or serious injury! WARNING
Hazardous situations which, if not avoided,
could result in death or serious injury! NOTICE
Property damage message or malfunction
Note
Additional information
Tip
Recommended action

EB 8310-1 EN

Contents

1
1.1
1.2
1.3
1.4

Safety instructions and measures.................................................................1-1
Notes on possible severe personal injury.......................................................1-4
Notes on possible personal injury.................................................................1-4
Notes on possible property damage..............................................................1-6
Warnings on the device................................................................................1-62
2.1

Markings on the device...............................................................................2-1
Actuator nameplate......................................................................................2-1

3
3.1
3.2
3.2.1
3.2.2
3.3
3.4
3.5

Design and principle of operation................................................................3-1
Direction of action and signal pressure routing...............................................3-3
Fail-safe position..........................................................................................3-3
Actuator stem extends..................................................................................3-3
Actuator stem retracts...................................................................................3-4
Accessories.................................................................................................3-4
Versions......................................................................................................3-5
Technical data.............................................................................................3-5

4
4.1
4.2
4.3
4.3.1
4.3.2
4.4

Shipment and on-site transport....................................................................4-1
Accepting the delivered goods......................................................................4-1
Removing the packaging from the actuator....................................................4-1
Transporting and lifting the actuator..............................................................4-1
Transporting the actuator..............................................................................4-2
Lifting the actuator.......................................................................................4-2
Storing the actuator......................................................................................4-2

5
5.1
5.2
5.2.1
5.2.2

Installation..................................................................................................5-1
Preparation for installation............................................................................5-1
Mounting the device.....................................................................................5-1
Mounting the actuator onto the valve.............................................................5-2
Pneumatic connection...................................................................................5-7

6
6.1
6.2
6.2.1
6.2.2
6.3
6.3.1
6.3.2

Start-up......................................................................................................6-1
Adapting the travel range.............................................................................6-2
Travel stop...................................................................................................6-3
Bottom travel stop (minimum travel)...............................................................6-3
Top travel stop (maximum travel)...................................................................6-3
Version with handwheel................................................................................6-3
Extending the actuator stem manually............................................................6-4
Retracting the actuator stem manually............................................................6-4

EB 8310-1 EN

Contents

7
7.1
7.2
7.3
7.4

Operation...................................................................................................7-1
Throttling service..........................................................................................7-1
On/off service.............................................................................................7-1
Manual mode (versions with handwheel only)................................................7-2
Additional notes concerning operation..........................................................7-2

8
8.1
8.2

Malfunctions...............................................................................................8-1
Troubleshooting...........................................................................................8-1
Emergency action........................................................................................8-2

9
9.1
9.2
9.3
9.4
9.4.1
9.4.2
9.5
9.5.1
9.6
9.7

Servicing and conversion.............................................................................9-1
Periodic testing............................................................................................9-2
Preparation for servicing or conversion work..................................................9-2
Mounting the actuator on the valve after service or conversion work................9-3
Service work...............................................................................................9-3
Replacing the diaphragm.............................................................................9-3
Replacing the actuator stem seals..................................................................9-5
Conversion work..........................................................................................9-7
Reversing the direction of action (fail-safe action)...........................................9-7
Determining dimension a..............................................................................9-9
Ordering spare parts and operating supplies.................................................9-9

10

Decommissioning......................................................................................10-1

11
11.1
11.2

Removal...................................................................................................11-1
Removing the actuator from the valve..........................................................11-2
Relieving the spring compression in the actuator...........................................11-4

12
12.1

Repairs.....................................................................................................12-1
Returning devices to SAMSON...................................................................12-1

13

Disposal....................................................................................................13-1

14

Certificates................................................................................................14-1

15
15.1
15.2
15.3
15.4

Annex......................................................................................................15-1
Tightening torques, lubricants and tools.......................................................15-1
Spare parts...............................................................................................15-1
After-sales service......................................................................................15-4
Information on the UK sales region..............................................................15-4

EB 8310-1 EN

Safety instructions and measures

1 Safety instructions and measures
Intended use
The SAMSON Type 3271 and Type 3277 Actuators are designed for operating a mounted
globe valve. In combination with the valve, the actuator is used to shut off the flow of liquids,
gases or vapors in the pipeline. Depending on the version, the actuator is suitable for throttling or on/off service. The actuator can be used in processing and industrial plants.
The actuator is designed to operate under exactly defined conditions (e.g. thrust, travel).
Therefore, operators must ensure that the actuator is only used in operating conditions thatmeet the specifications used for sizing the actuator at the ordering stage. In case operators
intend to use the actuator in other applications or conditions than specified, contact
SAMSON.
SAMSON does not assume any liability for damage resulting from the failure to use the device for its intended purpose or for damage caused by external forces or any other external
factors.
Î Refer to the technical data and nameplate for limits and fields of application as well as
possible uses.
Reasonably foreseeable misuse
The actuator is not suitable for the following applications:− Use outside the limits defined during sizing and by the technical data
− Use outside the limits defined by the accessories connected to the actuator
Furthermore, the following activities do not comply with the intended use:
− Use of non-original spare parts− Performing service and repair work not described
Qualifications of operating personnel
The actuator must be mounted, started up, serviced and repaired by fully trained and qualified personnel only; the accepted industry codes and practices must be observed. According
to these mounting and operating instructions, trained personnel refers to individuals who areable to judge the work they are assigned to and recognize possible hazards due to their specialized training, their knowledge and experience as well as their knowledge of the applicable standards.

EB 8310-1 EN

1-1

Safety instructions and measures

Personal protective equipment
We recommend wearing the following personal protective equipment when handling theType 3271 and Type 3277 Pneumatic Actuators:− Protective gloves and safety footwear when mounting or removing the actuator− Eye protection and hearing protection while the actuator is operating.
Î Check with the plant operator for details on further protective equipment.
Revisions and other modifications
Revisions, conversions or other modifications of the product are not authorized by SAMSON.
They are performed at the user's own risk and may lead to safety hazards, for example. Furthermore, the product may no longer meet the requirements for its intended use.
Safety devices
The Type 3271 and Type 3277 Actuators do not have any special safety equipment.
Warning against residual hazards
To avoid personal injury or property damage, plant operators and operating personnel must
prevent hazards that could be caused in the actuator by the signal pressure, stored springenergy or moving parts by taking appropriate precautions. Plant operators and operating
personnel must observe all hazard statements, warning and caution notes in these mounting
and operating instructions.
Responsibilities of the operator
Operators are responsible for proper use and compliance with the safety regulations. Operators are obliged to provide these mounting and operating instructions as well as the referenced documents to the operating personnel and to instruct them in proper operation. Furthermore, operators must ensure that operating personnel or third parties are not exposed toany danger.
Responsibilities of operating personnel
Operating personnel must read and understand these mounting and operating instructions aswell as the referenced documents and observe the specified hazard statements, warnings
and caution notes. Furthermore, operating personnel must be familiar with the applicablehealth, safety and accident prevention regulations and comply with them.

1-2

EB 8310-1 EN

Safety instructions and measures

Referenced standards, directives and regulations
According to the ignition risk assessment performed in accordance with Clause 5.2 of
ISO 80079-36, the non-electrical actuators do not have their own potential ignition source
even in the rare incident of an operating fault. As a result, they do not fall within the scope of
Directive 2014/34/EU.
Î For connection to the equipotential bonding system, observe the requirements specified in
Clause 6.4 of EN 60079-14 (VDE 0165-1).
The Type 3271 and Type 3277 Actuators are partly completed machinery as defined in the
Machinery Directive 2006/42/EC or the Directive 2008 No. 1597 Supply of Machinery(Safety) Regulations 2008.
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:− Mounting and operating instructions for the valve on which it is mounted− Mounting and operating instructions for mounted valve accessories (positioner, solenoid
valve etc.)− Safety Manual u SH 8310 for use in safety-instrumented systems− u AB 0100 for tools, tightening torques and lubricant

EB 8310-1 EN

1-3

Safety instructions and measures

1.1 Notes on possible severe personal injury! DANGER
Risk of bursting in the actuator.
Actuators are pressurized. Improper opening can lead to actuator components bursting.
Î Before starting any work on the actuator, depressurize all plant sections affected
and the actuator.

1.2 Notes on possible personal injury! WARNING
Crush hazard arising from moving parts.
The actuator contains moving parts (actuator stem), which can injure hands or fingers if
inserted into the actuator.
Î Do not touch the actuator stem or insert hands or finger into the yoke or beneath theactuator stem while the air supply is connected to the actuator.
Î While working on the actuator, disconnect and lock the pneumatic air supply as wellas the control signal.
Î Do not impede the movement of the actuator stem by inserting objects into the yoke.
Î Before unblocking the actuator stem after it has become blocked (e.g. due to seizing
up after remaining in the same position for a long time), release any stored energy
in the actuator (e.g. spring compression). See 'Relieving the spring compression in
the actuator' in the 'Removal' section.

1)

1-4

If not described otherwise in the valve documentation, the work position for the control valve is thefront view looking onto the operating controls (including valve accessories).

EB 8310-1 EN

Safety instructions and measures! WARNING
Risk of personal injury when the actuator vents.
The actuator is operated with air. As a result, air is vented during operation.
Î Install the control valve in such a way that vent openings are not located at eye level
and the actuator does not vent at eye level in the work position 1).
Î Use suitable silencers and vent plugs.
Î Wear eye and hearing protection when working near the actuator.
Risk of personal injury due to preloaded springs.
Actuators with preloaded springs are under tension. These actuators can be identified
by several longer bolts with nuts protruding from the bottom diaphragm case. Thesebolts allow the spring compression to be relieved evenly on disassembling the actuator.
Actuators with considerably preloaded springs are also labeled correspondingly (seethe 'Markings on the device' section).
Î Before starting any work on the actuator, relieve the compression from the preloaded springs. See 'Relieving the spring compression in the actuator' in the 'Removal'
section.
Risk of personal injury through incorrect operation, use or installation as a result of
information on the actuator being illegible.
Over time, markings, labels and nameplates on the actuator may become covered withdirt or become illegible in some other way. As a result, hazards may go unnoticed andthe necessary instructions not followed. There is a risk of personal injury.
Î Keep all relevant markings and inscriptions on the device in a constantly legible
state.
Î Immediately renew damaged, missing or incorrect nameplates or labels.

EB 8310-1 EN

1-5

Safety instructions and measures

1.3 Notes on possible property damage! NOTICE
Risk of actuator damage due to incorrectly attached slings.
Î Do not attach load-bearing slings to the handwheel or travel stop.
Risk of actuator damage due to excessively high or low tightening torques.
Observe the specified torques when tightening actuator components. Excessive tightening torques lead to parts wearing out more quickly. Parts that are not tightened far
enough may loosen.
Î Observe the specified tightening torques (u AB 0100).
Risk of actuator damage due to the use of unsuitable tools.
Certain tools are required to work on the actuator.
Î Only use tools approved by SAMSON (u AB 0100).
Risk of actuator damage due to the use of unsuitable lubricants.
The lubricants to be used depend on the actuator material. Unsuitable lubricants may
corrode and damage surfaces.
Î Only use lubricants approved by SAMSON (u AB 0100).

1.4 Warnings on the device
Warning

Meaning of the warning

Location on the device

Warning to indicate that the springs in theactuator are preloaded.
Actuators with preloaded springs are under
tension. Incorrect opening of the actuator can leadto personal injury through the sudden anduncontrolled projection of parts.
Before starting any work on the actuator, relieve
the compression from the preloaded springs. See'Relieving the spring compression in the actuator'
in the 'Removal' section.

1-6

EB 8310-1 EN

Markings on the device

2.1 Actuator nameplate

The nameplate shown was up to date at thetime of publication of this document. The
nameplate on the device may differ from theone shown.

The nameplate is stuck to the diaphragm
casing. It includes all details required to
identify the device.

3
4

Made in
12
13

2 Markings on the device

16

2
30
31

5

S/N:
Mat.

40

25

6

9
10

cm²
15

18
19

28

20
24

Fig. 2-1: Inscriptions on the nameplate of Type 3271 and 3277 Actuators with 120 cm² actuator area
Item Inscription meaning
2 Type designation
3 Company name
4 Company address (ZIP/postal code and city)
5 Data Matrix code
6 Device designation

Item Inscription meaning
28 Symbol for manual override:(optional)
30 Version (optional), e.g. SAM001
31 Version (optional), e.g. HW xx.xx.xx

9 Serial number
10 Material no.
12 Country of origin
13 Month and year of manufacture
15 Symbol indicating fail-safe action:
Actuator stem extends (FA)Actuator stem retracts (FE)
16 Actuator area in cm²
18 Bench range in bar
19 Bench range in psi
20 Actuator travel in mm
24 Permissible operating pressure pmax
in bar and/or psi
25 Diaphragm material
26 Type of connecting thread

EB 8310-1 EN

2-1

2-2

EB 8310-1 EN

Design and principle of operation

3 Design and principle of operation
The Type 3271-5 and Type 3277-5 Actuators have an actuator area of 120 cm². The
actuators mainly consist of two diaphragmcases (A1, A2), a rolling diaphragm (A4)and internal springs (A10). See Fig. 3-1 andFig. 3-2. The actuators are mounted in particular on SAMSON Series 240 Valves andType 3510 Micro-flow Valves.
The signal pressure pst creates the force F =pst · A at the diaphragm surface A which is
opposed by the springs (A10) in the actuator. The bench range is determined by the
number of springs used, taking into accountthe rated travel. The travel is proportional to
the signal pressure pst. The direction of action of the actuator stem (A7) depends on
how the springs are installed in the actuator.
Several springs may be fitted into one another.
A15 A9The stem connector clamps (A26/27) of Series 240 Valves connect the actuator stem
(A7) with the plug stem of the valve. The actuator stem (A7) and plug stem (5) of the micro-flow valve are connected using a threaded stem connection.
The Type 3277-5 Actuator is fitted with anadditional yoke on the bottom diaphragmcase (see Fig. 3-2). It permits the direct attachment of a positioner and/or limit switch.
The benefit of this design is that the travel
pick-off located inside the yoke is protectedagainst external influences.

A10

A1
A16

A20/21

A4
S
A5.1
A40
A42
A41

A8

A5.2

A2

A133

A7
A26/27
Fig. 3-1: Type 3271-5 Actuator with
120 cm² actuator area

EB 8310-1 EN

3-1

Design and principle of operation

A20/21

A10

A15
A7
A9

A133

A2

A1

A5.2

A40
A42
A5.1

A4

A2.1
A8
A27.3

A2.1

A41

A27.1
A26/27

Version for micro-flow valve
Fig. 3-2: Type 3277-5 Actuator with 120 cm² actuator area

Legend for Fig. 3-1 and Fig. 3-2
A1

Top diaphragm case

Diaphragm plate

A27.1 Stem connector nut

A2

Bottom diaphragm case A7

Actuator stem

A27.3 Lock nut

A2.1

Ring nut

A40

Radial shaft seal

Hex nut

A41

Wiper ring

Spring

A42

Dry bearing

Collar nut

A133

Stop bushing

Vent plug

S

Signal pressureconnection

A4

Switchover/connecting A8plate for signal pressure A9
routing
A10
Connection for actuator
A15
stem extends (FA)A16
Connection for actuator
A20
stem retracts (FE)A21
Diaphragm

A5.1

Diaphragm plate

A2.2
A2.3

3-2

A5.2

Hex bolt
Hex nut

A26/27Stem connector clamps

EB 8310-1 EN

Design and principle of operation

3.1 Direction of action andsignal pressure routing
Type 3271‑5 (see Fig. 3-1)
In the "actuator stem extends" version, thesignal pressure is routed through the bottom
signal pressure connection (S) to the bottom
diaphragm chamber and moves the actuator
stem (A7) upward opposing the spring force.
In the "actuator stem retracts" version, thesignal pressure is routed through the top signal pressure connection (S) to the top diaphragm chamber and moves the actuator
stem (A7) downward opposing the springforce.
Type 3277‑5 (see Fig. 3-2 and Fig. 3-3)
In the Type 3277-5 Actuator, the signal pressure is transmitted to the diaphragm chamber through the holes on the left or right sideof the yoke and over a switchover plate(A2.1, accessories, see Fig. 3-3). The failsafe action of the actuator ("actuator stem
extends" or "actuator stem retracts") determines how the switchover plate must bealigned with the marking (A2.5).
If the actuator is operated without apositioner, a connecting plate (A2.1,
accessories, see Fig. 3-3) is required insteadof the switchover plate. In this case, thesignal pressure is routed directly over thesignal pressure connection (A2.9) of theconnecting plate to the diaphragm chamber.

EB 8310-1 EN

Reversal of the direction of action
The direction of action for both Type 3271
and Type 3277 can be reversed (see the'Servicing and conversion' section).

3.2 Fail-safe position
Note
The listed fail-safe actions apply to
SAMSON globe valves.
When the signal pressure is reduced or thecontrol signal fails, the fail-safe position of
the control valve depends on whether thesprings are installed in the top or bottom diaphragm chamber.
Version with handwheel: in the active manual mode (the handwheel is not in the neutral position), the valve is not moved to thefail-safe position even upon failure of the
supply air.

3.2.1

Actuator stem extends

When the signal pressure is reduced or thecontrol signal fails, the springs move the actuator stem downward and close the globe
valve. The valve opens when the signal pressure is increased enough to overcome thespring force.

3-3

Design and principle of operation

Switchover plate

Connecting plate
A2.7

A2.9

A2.8
A2.6

A2.4

A2.4
A2.5

A2.5

Actuator stem extends
Left attachRight attachment
ment

Actuator stem retracts
Left attachRight attachment
ment

Actuator stem
Extends
Retracts

A2.4

Symbol

A2.7

With right attachment

A2.5

Marking for signal pressure input

A2.8

Seal with filter

A2.6

With left attachment

A2.9

Signal pressure connection

Fig. 3-3: Switchover plate and connecting plate in Type 3277-5

3.2.2

Actuator stem retracts

When the signal pressure is reduced or thecontrol signal fails, the springs move the actuator stem upward and open a mounted
globe valve. The valve closes when the signal
pressure is increased enough to overcome
the spring force.

3.3 Accessories
Switchover plate/connecting plate
Switchover plates and connecting plates arelisted as accessories.

3-4

With
index

Order no.

Switchover New
plate
Old

.01

1400-6822.00

1400-6819

New

.01

1400-6823.00

1400-6820.00

1400-6821

Connecting
G threadplate
NPT thread

Note
Actuators with device index .01 areequipped with new connecting plates. Old
and new connecting plates are not interchangeable.

EB 8310-1 EN

Design and principle of operation

Vent plugs

Accessories for

Vent plugs are screwed into the exhaust air
ports of pneumatic and electropneumatic devices. They ensure that any exhaust air that
forms can be vented to the atmosphere (toavoid excess pressure in the device). Furthermore, the vent plugs allow air intake to prevent a vacuum from forming in the device.
u AB 07
Lifting fixture
A special lifting tool is available to lift pneumatic actuators with 120 cm² actuator area(u AB 0100).
Feedback connection (travel pick-off interface) according to IEC 60534-6-1
Various valve accessories according toIEC 60534-6-1 and NAMUR recommendation can be mounted on SAMSON control
valves designed according to the modular
principle. See associated valve documentation. The travel pick-off interface for thesemounted devices can be ordered (accessories):
Accessories forType ...
Actuator

3271

Attachment
Attachment
Actuator on one side on both sides
area in (item number) (material
cm²
number)120

EB 8310-1 EN

1400-6816(included inscope of delivery of theactuator)

100029690

Type ...
Actuator
3277

Attachment
Attachment
Actuator on one side on both sides
area in (item number) (material
cm²
number)120

1400-6816

100029690

3.4 Versions− Standard version
The housings of Type 3271-5 andType 3277-5 Pneumatic Actuators havean actuator area of 120 cm² and aremade of die-cast aluminum.
− Version with travel stop
The Type 3271-5 and Type 3277-5 Actuators can be fitted with a mechanicallyadjustable travel stop. The travel is limited in both directions of action (stem extends or retracts).
− Version with handwheel
The Type 3271-5 and Type 3277-5 Actuators can be fitted with an additional
handwheel. The handwheel is mounted
on the top diaphragm case and is used
to adjust the travel manually.

3.5 Technical data
The nameplate provides information on theactuator version (see the 'Markings on thedevice' section).

3-5

Design and principle of operation

Supply pressure

Note
More information is available in Data Sheetu T 8310‑1.

The maximum permissible supply pressure is
specified in the order confirmation for thecontrol valve. However, the supply pressuremust not exceed 6 bar in throttling service.
See the 'Operation' section for restrictions in
on/off service.

Temperature range
The permissible temperature range is determined by the NBR diaphragm material.
Throttling service:–35 to +80 °C–31 to +176 °F

On/off service:–20 to +80 °C–4 to +176 °F

Dimensions and weights
See Table 3-1 and dimensional drawings on
page 3-7 and 3-8.

Table 3-1: Dimensions in mm and weights in kg
Actuator

Type3271‑53277‑5

Actuator area

cm²

120

120

HeightDiameter

H'

69

70

H1

205

293

H4ratedFA

75

75

H4maxFA

78

78

H4maxFE

78

78

H5

–

88

H6

34

34

H8

75

75

ØD

168

168

ØD2

10

10

Ød

M30x1.5 1)

M30x1.5 1)

a

G 1/8 (1/8 NPT)–

Without handwheel

2.5

3.2

With handwheel

4

4.5

ThreadAir connection
Weight

1)
2)

3-6

2)

In version for micro-flow valve: M20x1.5 thread
The weights specified apply to a specific standard device configuration. Weights of other actuatorconfigurations may differ depending on the version (material, number of actuator springs etc.).

EB 8310-1 EN

Design and principle of operation

ØDH'

Dimensional drawings

H5
H6

H4

H6

H4

H'

ØD

ØD2
Ød

Type 3271-5

EB 8310-1 EN

Type 3277-5

ØD2
Ød

3-7

Design and principle of operation

Dimensional drawings
ØD

H6

H4

H4

H6

H'

H5

H1

H'

H8

ØD

ØD2

ØD2

Ød

Ød

ØD2
M14 x 1
Ød

10.5

max. 58
10.5

ØD2
M14 x 1
Ød

H6Type 3277-5 with travel stop

max. 58
H6Type 3271-5 with handwheel

Versions with 7.5 mm travel for Type 3510 Micro-flow Valve

3-8

EB 8310-1 EN

Shipment and on-site transport

4 Shipment and on-site transport
The work described in this section is only tobe performed by personnel appropriately
qualified to carry out such tasks.

4.1 Accepting the delivered
goods
After receiving the shipment, proceed as follows:
1. Check the scope of delivery. Check thatthe specifications on the actuator nameplate match the specifications in the delivery note. See the 'Markings on the device' section for nameplate details.
2. Check the shipment for transportation
damage. Report any damage to SAMSON and the forwarding agent (refer todelivery note).
3. Determine the weight and dimensions of
the units to be lifted and transported inorder to select the appropriate lifting
equipment and lifting accessories. Referto the transport documents and the 'Technical data' section.

4.2 Removing the packaging
from the actuator
Observe the following sequence:

Î Leave the actuator in its transport container or on the pallet to transport it onsite.
Î Dispose and recycle the packaging in accordance with the local regulations.

4.3 Transporting and lifting theactuator! DANGER
Danger due to suspended loads falling.
Î Stay clear of suspended or moving
loads.
Î Close off and secure the transport paths.
! WARNING
Risk of lifting equipment tipping over andrisk of damage to lifting accessories due toexceeding the rated lifting capacity.
Î Only use approved lifting equipment andaccessories whose minimum lifting capacity is higher than the weight of theactuator (including the packaging, if applicable).
Tip
Our after-sales service can provide more detailed transport and lifting instructions on request.

Î Do not open or remove the packaging
until immediately before mounting theactuator.

EB 8310-1 EN

4-1

Shipment and on-site transport

4.3.1

Transporting the actuator

The actuator can be transported using lifting
equipment (e.g. crane or forklift).
Î Leave the actuator in its transport container or on the pallet to transport it.
Î Observe the transport instructions.
Transport instructions− Protect the actuator against external influences (e.g. impact).
− Do not damage the corrosion protection(paint, surface coatings). Repair any
damage immediately.
− Protect the actuator against moisture anddirt.
− The permissible transportation temperature is between –20 and +65 °C.

4.3.2

Lifting the actuator

Due to the low service weight, lifting equipment is not required to lift the actuator (e.g.
to mount it onto a valve). If lifting equipment(e.g. crane or forklift) is to be used, we havea gripping device available for the actuator(see 'Accessories' in the 'Design and principle of operation' section).
Note
See valve documentation for more information on lifting the entire control valve assembly.

4-2

4.4 Storing the actuator! NOTICE
Risk of actuator damage due to improper
storage.
Î Observe the storage instructions.
Î Avoid long storage times.
Î Contact SAMSON in case of different
storage conditions or longer storage
times.
Note
We recommend regularly checking the actuator and the prevailing storage conditions
during long storage times.
Storage instructions− When the valve and actuator are already assembled, observe the storage
conditions for control valves. See associated valve documentation.
− Protect the actuator against external influences (e.g. impact).
− Secure the actuator in the stored position
against slipping or tipping over.
− Do not damage the corrosion protection(paint, surface coatings). Repair any
damage immediately.
− Protect the actuator against moisture anddirt. Store it at a relative humidity of lessthan 75 %. In damp spaces, prevent condensation. If necessary, use a drying
agent or heating.

EB 8310-1 EN

Shipment and on-site transport− Make sure that the ambient air is free ofacids or other corrosive media.
− The permissible storage temperature is
between –20 and +65 °C.
− Do not place any objects on the actuator.
Special storage instructions for elastomers
Elastomer, e.g. actuator diaphragm− To keep elastomers in shape and to prevent cracking, do not bend them or hangthem up.
− We recommend a storage temperature of
15 °C for elastomers.
− Store elastomers away from lubricants,
chemicals, solutions and fuels.
Tip
Our after-sales service can provide more detailed storage instructions on request.

EB 8310-1 EN

4-3

4-4

EB 8310-1 EN

Installation

5 Installation
The work described in this section is only tobe performed by personnel appropriately
qualified to carry out such tasks.

5.1 Preparation for installation
Before mounting, make sure the following
conditions are met:
− The actuator is not damaged.
− The type designation, material and temperature range of the actuator match theambient conditions (temperatures etc.).
See the 'Markings on the device' section
for nameplate details.
Proceed as follows:Î Lay out the necessary material and tools
to have them ready during mounting.
Î Check that the vent plugs to be used are
not blocked.
Î Check any pressure gauges mounted on
valve accessories to make sure they function properly.
Î When the valve and actuator are already assembled, check the tightening
torques of the bolted joints (u AB 0100).
Components may loosen during transport.

5.2 Mounting the device
Depending on the version, SAMSON control
valves are either delivered with the actuator
already mounted on the valve or the valve
and actuator are delivered separately. Whendelivered separately, the valve and actuator

EB 8310-1 EN

must be assembled together on site. Proceed
as follows to mount the actuator and before
start-up.
! WARNING
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,air is vented during operation.
Î During mounting make sure that ventopenings are not located at eye level inthe work position of the control valve andthe actuator does not vent at eye level inthe work position.
Î Wear eye and hearing protection whenworking near the actuator.
! WARNING
Crush hazard arising from the moving
actuator stem.
Î Do not touch the actuator stem or insert
hands or finger into the yoke while theair supply is connected to the actuator.
Î Before working on the actuator, disconnect and lock the pneumatic air supply
as well as the control signal.
Î Do not impede the movement of the actuator stem by inserting objects into theyoke.
Î Before unblocking the actuator stem after
it has become blocked (e.g. due toseizing up after remaining in the same
position for a long time), release any
stored energy in the actuator (e.g. spring
compression). See 'Relieving the spring
compression in the actuator' in the'Removal' section.

5-1

Installation! NOTICE
Risk of actuator damage due to excessively
high or low tightening torques.
Observe the specified torques when tightening actuator components. Excessive tightening torques lead to parts wearing out more
quickly. Parts that are not tightened far
enough may loosen.
Î Observe the specified tightening torques(u AB 0100).
! NOTICE
Risk of actuator damage due to the use of
unsuitable tools.
Î Only use tools approved by SAMSON(u AB 0100).

5.2.1

Mounting the actuator
onto the valve

Tip
The valve and actuator are assembled withspecial attention paid to the actuator's benchrange and direction of action. These details
are specified on the actuator nameplate (seethe 'Markings on the device' section).

a) Mounting onto Series 240
Valves without anti-rotation
fixture1. Loosen the lock nut (10) and stem connector nut (9) on the valve.
2. Firmly press the plug together with theplug stem into the seat ring.
3. Thread down the lock nut and stem connector nut.
4. Remove the clamps of the stem connector(A26/27) and the ring nut (A8) from theactuator.

! NOTICE

5. Slide the ring nut over the plug stem.

Risk of valve damage or malfunction due toan incorrectly aligned V-port plug.
On mounting the actuator onto valves fittedwith a V-port plug, make sure that the
V-shaped port uncovered first faces toward
the valve outlet.
Î Read the 'Mounting the actuator onto
the valve' section in the associated valve
documentation.

6. Place the actuator onto the valve bonnet(2) and secure it with the ring nut.
7. Connect the signal pressure. See section 5.2.2.
8. Screw on the stem connector nut (9) byhand until it touches the actuator stem
(A7).
9. Turn the stem connector nut a further
quarter turn and secure this position withthe lock nut (10).
10. Position the stem connector clamps(A26/27) and screw them tight.

5-2

EB 8310-1 EN

Installation

S
A8
A7
2
84
A26/27
9

2

Bonnet/flange

8

Threaded bushing

9

Stem connector nut

10

Lock nut

84

Travel indicator
scale

A7

Actuator stem

A8

Ring nut

A26/27

Stem connector
clampsS

Signal pressureconnection

10
8Fig. 5-1: Type 3271 Pneumatic
Actuator on a
Series 240 Valve

11. Align the travel indicator scale (84) withthe tip of the stem connector clamp.

b) Attachment to Type 3510
Micro-flow Valve
1. Remove the ring nut (A8) from the actuator.
2. Loosely thread the lock nut (A27.3) andstem connector nut (A27.1) upward on
the actuator.
3. Place the actuator on the yoke (3).
4. Slide the ring nut (A8) over the stem connector nut (A27.1) and the lock nut(A27.3) onto the actuator stem (A7) andscrew tight. Observe tightening torques.

EB 8310-1 EN

5. Connect the signal pressure. See section 5.2.2.
6. In the "actuator stem extends" version:
to retract the actuator stem, apply a signal pressure corresponding to approx.
50 % of the bench range to the actuator.
Fasten tight the stem connector nut(A27.1) at the bottom end of the actuator stem (A7) to the bearing sleeve(A27.2) on the plug stem (5). Disconnect
the signal pressure.
In the "actuator stem retracts" version:
fasten tight the stem connector nut(A27.1) at the bottom end of the actuator stem (A7) to the bearing sleeve(A27.2) on the plug stem (5).

5-3Installation

3

Yoke

5

Plug stem with plug84

Travel indicator scale

A2

Bottom diaphragm
case

A7

Actuator stem

A8

Ring nut

A27.1 Stem connector nut
A27.2 Bearing sleeve(bottom part of thestem connector)
A27.3 Lock nut
A2
3

A8
A7
A27.3
A27.1

84

A27.2

5

Fig. 5-2: Type 3277 Pneumatic
Actuator on aType 3510 Micro-flow
Valve

A27.3
Fig. 5-3: Aligning the travelindicator scale

A27.1
O-ring

5-4

84

EB 8310-1 EN

Installation

7. In the "actuator stem extends" version:
apply a signal pressure that corresponds
to the lower bench range value to the actuator. Turn the stem connector (A27.1
and A27.2) on the actuator stem until theplug (5) starts to move out of the seat.
In the "actuator stem retracts" version:
apply a signal pressure that corresponds
to the upper bench range value to theactuator. Turn the stem connector (A27.1
and A27.2) on the actuator stem until theplug (5) starts to move out of the seat.
Note
If necessary, repeat the action described in 7
until the stem connector is correctly adjusted.
8. Lock the position of the stem connector
with the lock nut (A27.3).
9. Align the travel indicator scale (84) sothat the bottom line on the scale is at thesame level as the O-ring on the stem
connector nut. See Fig. 5-3.

c) Mounting on valve versions
with anti-rotation fixture

Anti-rotation fixture already mounted
onto the valve:
Slightly loosen the screws (303) and turnthe stem (9) inside the stem connector
clamps (301) by a few turns to move it
downward.
3. Remove the clamps of the stem connector(A26) and the ring nut (A8) from the actuator.
4. Slide the ring nut over the plug stem.
5. Place the actuator onto the valve bonnet(2) and secure it with the ring nut.
6. Connect the signal pressure. See section 5.2.2.
7. Continue following the instructions described under 'Mounting the external anti-rotation fixture' in the associated valve
documentation from the point where thestem (9) is threaded upwards until thehead of the stem rests on the extended
actuator stem.
8. Align and fasten the travel indicatorscale as described in the 'Mounting theactuator onto the valve' section in the associated valve documentation.

1. Firmly press the plug together with theplug stem into the seat ring.
2. Anti-rotation fixture not yet mounted
onto the valve:
Follow the instructions described under'Mounting the external anti-rotation fixture' in the associated valve documentation up to the point where the actuator is
to be mounted.

EB 8310-1 EN

5-5

Installation

2
A8
A7
A8

A26

A7

9

A26

303

9
301

2

303
301

A7

Actuator stem

2

Valve bonnet

A8

Ring nut

9

Stem

301

Clamps303

ScrewsA26 Stem connector clamps

Fig. 5-4: Anti-rotation fixture: standard version (left) and special version (right)

5-6

EB 8310-1 EN

Installation

5.2.2

Pneumatic connection

The maximum permissible supply pressure is
specified in the order confirmation for thecontrol valve. It is, however, restricted to
6 bar in throttling service. See the ‘Operation’ section for restrictions in on/off service.
How and with which accessories the air supply is connected depends on the actuatormodel and its direction of action. See 'Direction of action and signal pressure routing' in
the 'Design and principle of operation' section.
Determine the lower and upper signal pressure range values before connecting the supply air:− The lower signal pressure range value
corresponds to the minimum value of thebench range or operating range (whenthe travel range is adapted, see 'Adapting the travel range' in the 'Start-up' section).
− The upper signal pressure range value
corresponds to the maximum value of thebench range or operating range (whenthe travel range is adapted, see 'Adapting the travel range' in the 'Start-up' section).

a) Type 3271-5

The signal pressure is routed to the bottom diaphragm chamber and moves theactuator stem (A7) upward opposing thespring force.
Î Screw the vent plug into the connection
on the top diaphragm case.
Version with fail-safe action "actuator stem
retracts" (FE)Î Connect the signal pressure to the top
signal pressure connection (S).
The signal pressure is routed to the top
diaphragm chamber and moves the actuator stem (A7) downward opposing thespring force.
Î Screw the vent plug into the connection
on the bottom diaphragm case.

b) Type 3277-5
Operation with positioner (switchover plate)Î Turn the switchover plate to align thesymbol (A2.4) matching the fail-safe
action and attachment side with themarking (A2.5). See Fig. 5-5.
Operation without positioner (connecting
plate)
Î Turn the connecting plate to align thesymbol (A2.4) matching the fail-safe
action with the marking (A2.5). See
Fig. 5-5.

Version with fail-safe action "actuator stem
extends" (FA)

Î Make sure that the gasket for the connecting plate is correctly inserted.

Î Connect the signal pressure to the bottom
signal pressure connection (S). See
Fig. 5-1.

Î The connecting plate has threaded holes
with NPT and G threads. Seal the connection that is not used with the rubber
seal and square plug.

EB 8310-1 EN

5-7

Installation

Switchover plate

Connecting plate
A2.7

A2.9

A2.8
A2.6

A2.4

A2.4
A2.5

A2.5

Actuator stem extends
Left attachRight attachment
ment

Actuator stem retracts
Left attachRight attachment
ment

Actuator stem
Extends
Retracts

A2.4

Symbol

A2.7

With right attachment

A2.5

Marking for signal pressure input

A2.8

Seal with filter

A2.6

With left attachment

A2.9

Signal pressure connection

Fig. 5-5: Switchover plate and connecting plate in Type 3277-5

5-8

EB 8310-1 EN

Start-up

6 Start-up
The work described in this section is only tobe performed by personnel appropriately
qualified to carry out such tasks.
! DANGER
Risk of bursting due to incorrect opening ofpressurized equipment or components.
Pneumatic actuators are pressure equipmentthat may burst when handled incorrectly.
Flying projectile fragments or components
can cause serious injury or even death.
Before working on the actuator:
Î Depressurize all plant sections concerned
and the actuator. Release any stored energy.
! WARNING
Risk of personal injury due to preloaded
springs.
Actuators with preloaded springs are under
tension. These actuators can be identified byseveral longer bolts with nuts protrudingfrom the bottom diaphragm case. Actuatorswith considerably preloaded springs are alsolabeled correspondingly (see the 'Markings
on the device' section).
Î Only open the actuator following the instructions in this document. See 'Relieving the spring compression in the actuator' in the 'Removal' section.

EB 8310-1 EN! WARNING
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,air is vented during operation.
Î Wear eye and hearing protection whenworking near the actuator.
! WARNING
Crush hazard arising from the moving
actuator stem.
Î Do not insert hands or finger into theyoke while the air supply is connected tothe actuator.
Î Before working on the actuator, disconnect and lock the pneumatic air supply
as well as the control signal.
Î Do not impede the movement of the actuator stem by inserting objects into theyoke.
Î Before unblocking the actuator stem after
it has become blocked (e.g. due toseizing up after remaining in the same
position for a long time), release any
stored energy in the actuator (e.g. spring
compression). See 'Relieving the spring
compression in the actuator' in the'Removal' section.
! WARNING
Risk of personal injury through incorrect
operation, use or installation as a result ofincorrect information on the actuator.
After any adjustment or conversion work, thedetails on the actuator nameplate may no

6-1

Start-up

longer be correct. This may apply, for example, to the configuration ID or the symbol after reversal of the direction of action.
Î Immediately renew any nameplates orlabels with incorrect or outdated information.
Î Add any new values to the nameplate. If
necessary, contact SAMSON to obtain a
new nameplate.
! NOTICE
Risk of actuator damage due to excessively
high or low tightening torques.
Observe the specified torques when tightening actuator components. Excessive tightening torques lead to parts wearing out more
quickly. Parts that are not tightened far
enough may loosen.
Î Observe the specified tightening torques(u AB 0100).
! NOTICE
Risk of actuator damage due to the use of
unsuitable tools.
Î Only use tools approved by SAMSON(u AB 0100).

6.1 Adapting the travel range
In some cases, the valve and actuator havedifferent rated travels. Depending on the direction of action, proceed as follows:

6-2

Actuator stem extends
When a SAMSON valve is combined withan oversized actuator (i.e. the rated actuator
travel is larger than rated valve travel), thebench range is shifted.
Example: DN 25 valve with 7.5 mm rated
travel and 120 cm² actuator with 15 mm rated travel; 0.4 to 1.2 bar bench range.
The signal pressure for half the actuator travel (7.5 mm) is 0.8 bar. Adding it to the lower
signal pressure range value of 0.4 bar results in a signal pressure of 1.2 bar required
for adapting the travel range. The new lower
signal range value is 1.2 bar and the newupper signal range value 2.0 bar.
Î Write the new signal pressure range of
1.2 to 2.0 bar on the nameplate as theoperating range with adapted travel
range.
Actuator stem retracts
When a SAMSON valve is combined withan oversized actuator (e.g. the rated travelof the actuator is larger than the rated travelof the valve), only the first half of the actuator's bench range can be used.
Example: DN 25 valve with 7.5 mm rated
travel and 120 cm² actuator with 15 mm rated travel; 0.2 to 1 bar bench range.
At half the valve travel, the operating range
is between 0.2 and 0.6 bar.
Î Write the new signal pressure range of
0.2 to 0.6 bar on the nameplate as theoperating range with adapted travel
range.

EB 8310-1 EN

Start-up

6.2 Travel stop

4. Attach the cover (A73) and retighten thelock nut (A70).

In the version with travel stop, the maximum
and minimum actuator travel can be limited(see Fig. 6-1).

6.2.2 Top travel stop (maximum
travel)6.2.1 Bottom travel stop (minimum travel)

1. Loosen the lock nut (A70).
2. Adjust the cover (A73) to the required
travel stop.

1. Loosen lock nut (A70) and remove cover(A73).

3. Retighten lock nut (A70).

2. Unscrew lock nut (A74) and turn the adjustment nut (A72) to adjust the travelstop.

6.3 Version with handwheel
A stem connector (A51) links the handwheel
and actuator stem. The actuator stem position can be adjusted using the handwheel(A60). See Fig. 6-2.

3. Tighten lock nut (A74).

A73
A74
A72

A70

A1

Top diaphragm case

A5

Diaphragm plate

A7

Actuator stem

A70 Lock nut
A72 Adjustment nut
A73 Cover
A74 Lock nut

A1

A5

Left half:
Right half:

Actuator stem retracts (FE)Actuator stem extends (FA)A7
Fig. 6-1: Travel stopEB 8310-1 EN

6-3

Start-up

To change from manual to automatic operation, put the handwheel into the neutral position by aligning the dot on the stem connector (A51) within the window on the plastic
cover with the horizontal marking on the
housing.To change from manual to automatic
operation, put the handwheel into the neutral
position.
Note
If you want to fit a handwheel to an actuator,
contact our after-sales service.

6.3.1

Extending the actuator
stem manually

1. Turn the handwheel clockwise until thebottom stop position is reached.
2. Extend the actuator stem up to the required position.

6.3.2

Retracting the actuator
stem manually

1. Turn the handwheel counterclockwise until the top stop position is reached.
2. Retract the actuator stem up to the required position.

A60
Dot

Horizontal marking on the housing

A51

A51

Stem connector

A60

Handwheel

Fig. 6-2: Type 3271-5 Actuator with handwheel

6-4

EB 8310-1 EN

Operation

7 Operation
The work described in this section is only tobe performed by personnel appropriately
qualified to carry out such tasks.
! WARNING
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,air is vented during operation.
Î Wear eye and hearing protection whenworking near the actuator.
! WARNING
Crush hazard arising from the moving
actuator stem.
Î Do not insert hands or finger into theyoke while the air supply is connected tothe actuator.
Î Before working on the actuator, disconnect and lock the pneumatic air supply
as well as the control signal.
Î Do not impede the movement of the actuator stem by inserting objects into theyoke.
Î Before unblocking the actuator stem after
it has become blocked (e.g. due toseizing up after remaining in the same
position for a long time), release any
stored energy in the actuator (e.g. spring
compression). See 'Relieving the spring
compression in the actuator' in the'Removal' section.

EB 8310-1 EN! WARNING
Risk of personal injury through incorrect
operation, use or installation as a result ofincorrect information on the actuator.
After any adjustment or conversion work, thedetails on the actuator nameplate may nolonger be correct. This may apply, forexample, to the configuration ID or thesymbol after reversal of the direction ofaction.
Î Immediately renew any nameplates orlabels with incorrect or outdated information.
Î Add any new values to the nameplate. If
necessary, contact SAMSON to obtain a
new nameplate.

7.1 Throttling service
The maximum permissible supply pressure is
specified in the order confirmation for thecontrol valve. It is, however, restricted to
6 bar in throttling service for Type 3271-5
and Type 3277-5 Pneumatic Actuators.

7.2 On/off service
In on/off service, the supply pressure mustbe limited depending on the bench range or
operating range of the actuator. The applicable bench range or operating range which
the actuator can move through is written on
the nameplate (see the 'Markings on the device' section).

7-1

Operation

Actuator stem retracts
With fail-safe action "actuator stem retracts",
the permissible supply pressure must not exceed the upper bench range value by morethan 3 bar:
Rated signal
range
0.2 to 1.0 bar
0.4 to 2.0 bar
0.6 to 3.0 bar

Fail-safe
actionActuator stem
retracts

Max.
supplypressure
4 bar
5 bar
6 bar

Actuator stem extends
With fail-safe action "actuator stem extends"
and travel stop, the supply pressure must notexceed the upper signal range value by
more than 1.5 bar.

7.4 Additional notes concerning operation
Î Label actuators with reduced supply
pressure with a sticker ("Max. supply
pressure limited to ... bar").
Î Only apply the signal pressure to the signal pressure connection (S) on the diaphragm chamber of the actuator which
does not contain any springs (seeFig. 3-1 in the 'Design and principle ofoperation' section).
Î Only use vent plugs that let air throughthem (A16 in Fig. 3-1 in the 'Design andprinciple of operation' section).

7.3 Manual mode (versions
with handwheel only)
In the manual mode, the valve is opened
and closed by the handwheel. The valve position is independent of the signal pressureor actuator springs.
The handwheel must be in the neutral position to allow the actuator to move through its
entire travel range in throttling or on/off service.

7-2

EB 8310-1 EN

Malfunctions

8 Malfunctions
Read hazard statements, warnings and caution notes in the 'Safety instructions and measures' section.

8.1 Troubleshooting
Malfunction

Possible reasons

Recommended action

Actuator stem does not
move on demand.

Actuator is blocked.

Put the control valve out of operation (see the‘Decommissioning’ section) and remove theblockage.
WARNING! A blocked actuator (e.g. due to seizing
up after remaining in the same position for a longtime) can suddenly start to move uncontrollably.
Injury to hands or fingers is possible if they are
inserted into the actuator or valve.
Before trying to unblock the actuator stem,
disconnect and lock the pneumatic air supply aswell as the control signal. Before unblocking theactuator stem, release any stored energy in theactuator (e.g. spring compression). See 'Relieving
the spring compression in the actuator' in the'Removal' section.

Insufficient signal
pressure

Check the signal pressure.
Check the signal pressure line for leakage.

Signal pressure not
See 'Signal pressure routing' in the 'Design andconnected to the correct principle of operation' section.
diaphragm chamber.

Actuator stem does not
stroke through its
complete travel range.

Diaphragm in theactuator defective

See 'Replacing the diaphragm' in the 'Servicing'
section.

Travel stop active

See 'Adjusting the travel stop' in the 'Start-up'
section.

Insufficient signal
pressure

Check the signal pressure.
Check the signal pressure line for leakage.

Incorrect setting ofvalve accessories.

Check the actuator without valve accessories.
Check the settings of the valve accessories.

Note
Contact our after-sales service for malfunctions not listed in the table.

EB 8310-1 EN

8-1

Malfunctions

8.2 Emergency action
Plant operators are responsible for emergency action to be taken in the plant.

8-2

EB 8310-1 EN

Servicing and conversion

9 Servicing and conversion
The work described in this section is only tobe performed by personnel appropriately
qualified to carry out such tasks.
The following documents are also required
for servicing the valve:− u AB 0100 for tools, tightening torques
and lubricant! DANGER
Risk of bursting due to incorrect opening ofpressurized equipment or components.
Pneumatic actuators are pressure equipmentthat may burst when handled incorrectly.
Flying projectile fragments or components
can cause serious injury or even death.
Before working on the actuator:
Î Depressurize all plant sections concerned
and the actuator. Release any stored energy.
! WARNING
Risk of personal injury due to preloaded
springs.
Actuators with preloaded springs are under
tension. These actuators can be identified byseveral longer bolts with nuts protrudingfrom the bottom diaphragm case. Actuatorswith considerably preloaded springs are alsolabeled correspondingly (see the 'Markings
on the device' section).
Î Only open the actuator following the instructions in this document. See 'Relieving the spring compression in the actuator' in the 'Removal' section.

EB 8310-1 EN! WARNING
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,air is vented during operation.
Î Wear eye and hearing protection whenworking near the actuator.
! WARNING
Crush hazard arising from the moving actuator stem.
Î Do not insert hands or finger into theyoke while the air supply is connected tothe actuator.
Î Before working on the actuator, disconnect and lock the pneumatic air supply
as well as the control signal.
Î Do not impede the movement of the actuator stem by inserting objects into theyoke.
Î Before unblocking the actuator stem after
it has become blocked (e.g. due toseizing up after remaining in the same
position for a long time), release any
stored energy in the actuator (e.g. spring
compression). See 'Relieving the spring
compression in the actuator' in the'Removal' section.
! WARNING
Risk of personal injury through incorrect
operation, use or installation as a result ofincorrect information on the actuator.
After any adjustment or conversion work, thedetails on the actuator nameplate may no

9-1

Servicing and conversion

longer be correct. This may apply, for example, to the configuration ID or the symbol after reversal of the direction of action.
Î Immediately renew any nameplates orlabels with incorrect or outdated information.
Î Add any new values to the nameplate. If
necessary, contact SAMSON to obtain a
new nameplate.
! NOTICE
Risk of actuator damage due to excessively
high or low tightening torques.
Observe the specified torques when tightening actuator components. Excessive tightening torques lead to parts wearing out more
quickly. Parts that are not tightened far
enough may loosen.
Î Observe the specified tightening torques(u AB 0100).
! NOTICE
Risk of actuator damage due to the use of
unsuitable tools.
Î Only use tools approved by SAMSON(u AB 0100).
! NOTICE
Risk of valve damage due to the use of
unsuitable lubricants.
Î Only use lubricants approved by
SAMSON (u AB 0100).

9-2

Note
− The product warranty becomes void ifservice or repair work not described inthese instructions is performed without
prior agreement by SAMSON's After-sales
Service.
− Only use original spare parts by
SAMSON, which comply with the original
specifications.

9.1 Periodic testing
Depending on the operating conditions,check the actuator at certain intervals to prevent possible failure before it can occur.
Plant operators are responsible for drawing
up an inspection and test plan.
Tip
Our after-sales service can support you in
drawing up an inspection and test plan foryour plant.

9.2 Preparation for servicing
or conversion work
1. Lay out the necessary material and tools
to have them ready for the intendedwork.
2. Put the actuator out of operation (see the'Decommissioning' section).
3. Remove the actuator from the valve (seethe 'Removal' section).

EB 8310-1 EN

Servicing and conversion

Note
To remove an actuator with "stem extends"
fail-safe action and/or with preloaded
springs, a certain signal pressure must be
applied to the actuator (see the 'Removal'
section). Afterwards, the signal pressuremust be removed and the air supply disconnected again and locked.
4. Relieve the compression from the preloaded springs. See 'Relieving the spring
compression in the actuator' in the 'Removal' section.
5. Unthread and remove the nuts and bolts(including the washers) from around theactuator casing.
The following service and/or conversion
work can be performed after preparation iscompleted:− Replace the diaphragm (see section 9.4.1)− Replace the actuator stem seals (see section 9.4.2)− Reverse the direction of action (see section 9.5.1)

9.3 Mounting the actuator on
the valve after service orconversion work
1. Mount the actuator (see the 'Installation'section).
2. Adjust the upper or lower bench range
values (see the 'Start-up' section).

EB 8310-1 EN

9.4 Service work
See Fig. 9-1

9.4.1

Replacing the diaphragmTip
We recommend to also replace the actuator
stem seal on replacing the diaphragm. See
section 9.4.2.

a) Actuator stem extends
1. Lift off the top diaphragm case (A1) andremove springs (A10).
2. Pull the actuator stem (A7) together withthe diaphragm plate (A5.1), diaphragm(A4) and diaphragm plate (A5.2) out of
the bottom diaphragm case (A2).
3. Unscrew the collar nut (A15).
! NOTICE
Malfunction due to loosened nut.
The nut (A9) on the actuator stem serves toadjust the dimension a.
Î Do not undo the nut (A9).
Î If the nut has been loosened, readjust thedimension a as specified in Table 9-1.
4. Remove the diaphragm plate (A5.1), diaphragm (A4) and diaphragm plate(A5.2) from the actuator stem (A7).
5. Place the new diaphragm on the diaphragm plate (A5.2). Place on the otherdiaphragm plate (A5.1).

9-3

Servicing and conversion

A15 A9

A10

A1
A16

Fig. 9-1: Type 3271-5 andType 3277-5
Pneumatic Actuators

A4
S

a

A5.1
A40
A42

A8

A5.2

A7
A41

Type 3271-5

aA20/21

A2.1

Type 3277-5

A133

A1

Top diaphragm case

Actuator stem

A21

Hex nut

A2

Bottom diaphragm case A8

Ring nut

A40

Radial shaft seal

A2.1

Switchover/conn. platefor signal press.routing

A9

Hex nut

A41

Wiper ring

A4

Diaphragm

A10

Springs

A42

Dry bearing

A5.1

Diaphragm plate

A15

Collar nut

A133

Stop bushingA5.2

Diaphragm plate

A16

Vent plug

S

Signal press. connection

A20

Hex bolt

Dim. a Refer to Table 9-1

9-4

A7

EB 8310-1 EN

Servicing and conversion

6. Check the sealing element of the collar
nut (A15). If necessary, renew it (orderno. 8353-0533).

4. Remove the diaphragm plate (A5.1), diaphragm (A4) and diaphragm plate(A5.2) from the actuator stem (A7).

7. Apply a suitable lubricant to the actuator
stem (A7).

5. Place the new diaphragm on the diaphragm plate (A5.2). Place on the otherdiaphragm plate (A5.1).

8. Place the actuator stem (A7) together
with the diaphragm plate (A5.1), diaphragm (A4) and diaphragm plate(A5.2) in the bottom diaphragm case(A2).
9. Tighten the collar nut (A15).
10. Place the springs (A10) into the bottom
diaphragm case, centering them in theintended recesses.
11. Place on the top diaphragm case (A1).

6. Check the sealing element of the collar
nut (A15). If necessary, renew it (orderno. 8353-0533).
7. Check whether the springs (A10) rest
correctly in the bottom diaphragm case(A2).
8. Apply a suitable lubricant to the actuator
stem (A7).

12. Fasten the top and bottom diaphragmcases (A1, A2) together using the nuts(A21) and bolts (A20). Observe tightening torques.

9. Place the actuator stem (A7) together
with the diaphragm plate (A5.1), diaphragm (A4) and diaphragm plate(A5.2) in the bottom diaphragm case(A2).

b) Actuator stem retracts

11. Place on the top diaphragm case (A1).

1. Lift off the top diaphragm case (A1).
2. Pull the actuator stem (A7) together withthe diaphragm plate (A5.1), diaphragm(A4) and diaphragm plate (A5.2) out of
the bottom diaphragm case (A2).
3. Unscrew the collar nut (A15).
! NOTICE
Malfunction due to loosened nut.
The nut (A9) on the actuator stem serves toadjust the dimension a.
Î Do not undo the nut (A9).
Î If the nut has been loosened, readjust thedimension a as specified in Table 9-1.

EB 8310-1 EN

10. Tighten the collar nut (A15).
12. Fasten the top and bottom diaphragmcases (A1, A2) together using the nuts(A21) and bolts (A20). Observe tightening torques.

9.4.2

Replacing the actuator
stem seals

Tip
We recommend to also replace the actuator
stem seal on replacing the diaphragm. See
section 9.4.1.

9-5

Servicing and conversiona) Actuator stem extendsb) Actuator stem retracts

1. Lift off the top diaphragm case (A1) andremove springs (A10).

1. Lift off the top diaphragm case (A1).

2. Pull the actuator stem (A7) together withthe diaphragm plate (A5.1), diaphragm(A4) and diaphragm plate (A5.2) out of
the bottom diaphragm case (A2).
3. Remove the radial shaft seal (A40).
4. Check the dry bearing (A42) and wiper(A41) and renew them, if necessary.
5. Apply a suitable lubricant to the seal lipof the new radial shaft seal.
6. Use a suitable tool to mount the radial
shaft seal. Observe the correct alignmentof the radial shaft seal (see Fig. 9-2).
7. Fill the cavity of the radial shaft seal, in
which the spring is seated, with lubricant.
8. Apply a suitable lubricant to the actuator
stem (A7).
9. Place the actuator stem (A7) together
with the diaphragm plate (A5.1), diaphragm (A4) and diaphragm plate(A5.2) in the bottom diaphragm case(A2).
10. Place the springs (A10) into the bottom
diaphragm case, centering them in theintended recesses.
11. Place on the top diaphragm case (A1).

2. Pull the actuator stem (A7) together withthe diaphragm plate (A5.1), diaphragm(A4) and diaphragm plate (A5.2) out of
the bottom diaphragm case (A2).
3. Remove the radial shaft seal (A40).
4. Check the dry bearing (A42) and wiper(A41) and renew them, if necessary.
5. Apply a suitable lubricant to the seal lipof the new radial shaft seal.
6. Use a suitable tool to mount the radial
shaft seal. Observe the correct alignmentof the radial shaft seal (see Fig. 9-2).
7. Fill the cavity of the radial shaft seal, in
which the spring is seated, with lubricant.
8. Apply a suitable lubricant to the actuator
stem (A7).
9. Place the actuator stem (A7) together
with the diaphragm plate (A5.1), diaphragm (A4) and diaphragm plate(A5.2) in the bottom diaphragm case(A2).
10. Place on the top diaphragm case (A1).
11. Fasten the top and bottom diaphragmcases (A1, A2) together using the nuts(A21) and bolts (A20). Observe tightening torques.

12. Fasten the top and bottom diaphragmcases (A1, A2) together using the nuts(A21) and bolts (A20). Observe tightening torques.

9-6

EB 8310-1 EN

Servicing and conversion

Radial shaft seal(A4) and diaphragm plate (A5.2) out of
the bottom diaphragm case (A2).
3. Unscrew the collar nut (A15).

Seal lip

Wiper ring
Fig. 9-2: Aligning the radial shaft and seal
wiper ring

9.5 Conversion work
See Fig. 9-1

9.5.1

Reversing the directionof action (fail-safe
action)The direction of action (and fail-safe action)of pneumatic actuators can be changed. The
fail-safe action is indicated on the nameplateby a symbol:
Actuator stem extends
Actuator stem retractsa) Reversal of the direction ofaction from stem extends tostem retracts
1. Lift off the top diaphragm case (A1) andremove springs (A10).
2. Pull the actuator stem (A7) together withthe diaphragm plate (A5.1), diaphragmEB 8310-1 EN! NOTICE
Malfunction due to loosened nut.
The nut (A9) on the actuator stem serves toadjust the dimension a.
Î Do not undo the nut (A9).
Î If the nut has been loosened, readjust thedimension a as specified in Table 9-1.
4. Remove the diaphragm plate (A51), diaphragm (A4) and diaphragm plate(A5.2) from the actuator stem (A7) andplace them back on again in the reverse
order.
5. Tighten the collar nut (A15).
6. Apply a suitable lubricant to the actuator
stem (A7).
7. Place the springs (A10) in the bottom diaphragm case (A2), centering them in
the intended recesses.
8. Place the actuator stem (A7) together
with the diaphragm plate (A5.1), diaphragm (A4) and diaphragm plate(A5.2) in the bottom diaphragm case
(A2).
9. Place on the top diaphragm case (A1).
10. Fasten the top and bottom diaphragmcases (A1, A2) together using the nuts(A21) and bolts (A20). Observe tightening torques.
11. Type 3271-5: connect the signal pressure as described in 'Pneumatic connection' in the 'Installation' section. Unscrew

9-7

Servicing and conversion

the vent plug (A16) from the top signal
pressure connection and screw it into thebottom connection (S).
Type 3277-5: connect the signal pressure as described in 'Pneumatic connection' in the 'Installation' section.
The actuator springs, which now pushagainst the diaphragm plate from below,
cause the actuator stem to retract. The
signal pressure is connected to the top
connection (S) on the top diaphragmcase. As a result, the actuator stem extends opposing the spring force as thesignal pressure increases.
12. Affix a new nameplate with changed
symbol and new configuration ID to theactuator.

b) Reversal of the direction ofaction from stem retracts tostem extends
1. Lift off the top diaphragm case (A1).
2. Pull the actuator stem (A7) together withthe diaphragm plate (A5.1), diaphragm(A4) and diaphragm plate (A5.2) out of
the bottom diaphragm case (A2).
3. Remove the springs (A10).
4. Unscrew the collar nut (A15).
! NOTICE
Malfunction due to loosened nut.
The nut (A9) on the actuator stem serves toadjust the dimension a.
Î Do not undo the nut (A9).

9-8Î If the nut has been loosened, readjust thedimension a as specified in Table 9-1.
5. Remove the diaphragm plate (A51), diaphragm (A4) and diaphragm plate(A5.2) from the actuator stem (A7) andplace them back on again in the reverse
order.
6. Tighten the collar nut (A15).
7. Apply a suitable lubricant to the actuator
stem (A7).
8. Place the actuator stem (A7) together
with the diaphragm plate (A5.1), diaphragm (A4) and diaphragm plate(A5.2) in the bottom diaphragm case
(A2).
9. Place the springs (A10) in the bottom diaphragm case (A2), centering them in
the intended recesses.
10. Place on the top diaphragm case (A1).
11. Fasten the top and bottom diaphragmcases (A1, A2) together using the nuts(A21) and bolts (A20). Observe tightening torques.
12. Type 3271-5: connect the signal pressure as described in 'Pneumatic connection' in the 'Installation' section. Unscrew
the vent plug (A16) from the bottom signal pressure connection and screw it into
the top connection (S).
Type 3277-5: connect the signal pressure as described in 'Pneumatic connection' in the 'Installation' section.
The actuator springs, which now pushagainst the diaphragm plate from above,cause the actuator stem to extend. The

EB 8310-1 EN

Servicing and conversion

signal pressure is connected to the bottom connection (S) on the bottom diaphragm case. As a result, the actuator
stem retracts opposing the spring force
as the signal pressure increases.
13. Affix a new nameplate with changed
symbol and new configuration ID to theactuator.

9.6 Determining dimension a

Spare parts
See Annex for details on spare parts.
LubricantSee document u AB 0100 for details on
suitable lubricants.
Tools
See document u AB 0100 for details on
suitable tools.

If the nut (A9) has come undone at the actuator stem (A7) during service and conversion
work, the dimension a (see Fig. 9-1) must be
readjusted.
Table 9-1: Dimension aTravel [mm]Dimension a[mm]3271‑515

100.75

Type 3271-5
for micro-flow
valve

7.5

86

3277‑515188.53277‑520

185.5Type 3277-5
for micro-flow
valve

7.5

158.5

Type/version

9.7 Ordering spare parts andoperating supplies
Contact your nearest SAMSON subsidiaryor SAMSON's After-sales Service for information on spare parts, lubricants and tools.

EB 8310-1 EN

9-9

9-10

EB 8310-1 EN

Decommissioning

10 Decommissioning
The work described in this section is only tobe performed by personnel appropriately
qualified to carry out such tasks.
! DANGER
Risk of bursting due to incorrect opening ofpressurized equipment or components.
Pneumatic actuators are pressure equipmentthat may burst when handled incorrectly.
Flying projectile fragments or components
can cause serious injury or even death.
Before working on the actuator:
Î Depressurize all plant sections concerned
and the actuator. Release any stored energy.
! WARNING
Risk of personal injury due to preloaded
springs.
Actuators with preloaded springs are under
tension. These actuators can be identified byseveral longer bolts with nuts protrudingfrom the bottom diaphragm case. Actuatorswith considerably preloaded springs are alsolabeled correspondingly (see the 'Markings
on the device' section).
Î Only open the actuator following the
instructions in this document. See'Relieving the spring compression in theactuator' in the 'Removal' section.

! WARNING
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,air is vented during operation.
Î Wear eye and hearing protection whenworking near the actuator.
! WARNING
Crush hazard arising from the moving
actuator stem.
Î Do not insert hands or finger into theyoke while the air supply is connected tothe actuator.
Î Before working on the actuator, disconnect and lock the pneumatic air supply
as well as the control signal.
Î Do not impede the movement of the actuator stem by inserting objects into theyoke.
Î Before unblocking the actuator stem after
it has become blocked (e.g. due toseizing up after remaining in the same
position for a long time), release any
stored energy in the actuator (e.g. spring
compression). See 'Relieving the spring
compression in the actuator' in the'Removal' section.
To decommission the actuator for service
work or before removing it from the valve,proceed as follows:
1. Put the control valve out of operation.
See associated valve documentation.
2. Disconnect the pneumatic air supply todepressurize the actuator.

EB 8310-1 EN

10-1

10-2

EB 8310-1 EN

Removal

11 Removal
The work described in this section is only tobe performed by personnel appropriately
qualified to carry out such tasks.
! DANGER
Risk of bursting due to incorrect opening ofpressurized equipment or components.
Pneumatic actuators are pressure equipmentthat may burst when handled incorrectly.
Flying projectile fragments or components
can cause serious injury or even death.
Before working on the actuator:
Î Depressurize all plant sections concerned
and the actuator. Release any stored energy.
! WARNING
Risk of personal injury due to preloaded
springs.
Actuators with preloaded springs are under
tension. These actuators can be identified byseveral longer bolts with nuts protrudingfrom the bottom diaphragm case. Actuatorswith considerably preloaded springs are alsolabeled correspondingly (see the 'Markings
on the device' section).
Î Only open the actuator following the instructions in this document. See 'Relieving the spring compression in the actuator' in the 'Removal' section.

EB 8310-1 EN! WARNING
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,air is vented during operation.
Î Wear eye and hearing protection whenworking near the actuator.
! WARNING
Crush hazard arising from the moving actuator stem.
Î Do not touch the actuator stem or insert
hands or finger into the yoke while theair supply is connected to the actuator.
Î Before working on the actuator, disconnect and lock the pneumatic air supply
as well as the control signal.
Î Do not impede the movement of the actuator stem by inserting objects into theyoke.
Î Before unblocking the actuator stem after
it has become blocked (e.g. due toseizing up after remaining in the same
position for a long time), release any
stored energy in the actuator (e.g. spring
compression). See 'Relieving the spring
compression in the actuator' in the'Removal' section.
Before removing the valve, make sure the following conditions are met:
− The actuator is put out of operation (seethe 'Decommissioning' section).

11-1

Removal

11.1 Removing the actuatorfrom the valvea) Series 240 Valves

4. Lift the actuator off the valve.
5. Fasten the lock nut (10) and stem connector nut (9) on the valve.
6. Fasten ring nut (A8) on the actuator.

1. Undo the clamps of the stem connector(A26/27).
2. Loosen the stem connector nut (9) andlock nut (10).
3. In the "actuator stem extends" version:
to retract the actuator stem, apply a signal pressure corresponding to approx.
50 % of the bench range to the actuator.
Loosen the ring nut (A8). Disconnect thesignal pressure.
In the "actuator stem retracts" version:undo ring nut (A8).

S
A8
A7
2
84
A26/27
9

2

Bonnet/flange

8

Threaded bushing

9

Stem connector nut

10

Lock nut

84

Travel indicator
scale

A7

Actuator stem

A8

Ring nut

A26/27

Stem connector
clampsS

Signal pressureconnection

10
8

11-2

Fig. 11-1: Type 3271 Pneumatic
Actuator on a
Series 240 Valve

EB 8310-1 EN

Removalb) Type 3510 Micro-flow Valve
1. Loosen the lock nut (A27.3).
2. In the "actuator stem extends" version:
to retract the actuator stem, apply a signal pressure corresponding to approx.
50 % of the bench range to the actuator.
Use a suitable tool to hold the stem connector nut (A27.1) and bearing sleeve(A27.2) stationary and unscrew them.
Disconnect the signal pressure.
In the "actuator stem retracts" version:use a suitable tool to hold the stem con-nector nut (A27.1) and bearing sleeve(A27.2) stationary and unscrew them.
3. Loosen the ring nut (A8).
4. Lift the actuator off the valve.
5. Loosely thread the lock nut (A27.3) andstem connector nut (A27.1) on the actuator.
Note
The bearing sleeve (A27.2) remains on thevalve.
6. Fasten ring nut (A8) on the actuator.
3

Yoke

5

Plug stem with plug84

Travel indicator scale

A2

Bottom diaphragm
case

A7

Actuator stem

A8

Ring nut

A27.1 Stem connector nut
A27.2 Bearing sleeve (bottom part of the stem
connector)
A27.3 Lock nut
A2
A8
A7

3

A27.3
A27.1
A27.2

EB 8310-1 EN

84

Fig. 11-2: Type 3277 Pneumatic
Actuator on aType 3510 Micro-flow
Valve

5

11-3

Removal

11.2 Relieving the spring compression in the actuator
The long clamping bolts with long clamping
nuts and the short bolts with short nuts arearranged evenly around the circumference of
the actuator housing to fasten the top andbottom diaphragm cases together. The
springs in the actuator are compressed using
the long clamping nuts and bolts.

Short bolt

To relieve the compression of the springs in
the actuator, proceed as follows:

Washer

1. Unthread and remove the short nuts andbolts (including the washers) on the diaphragm cases.

Clamping bolt

2. Loosen the long clamping nuts and boltson the diaphragm cases evenly in acrisscross pattern to gradually relieve thespring compression. Hold the bolt headstationary with a suitable tool and apply
the torque to the nuts.

11-4

Short nut

WasherClamping nut
Fig. 11-3: Preloaded springs

EB 8310-1 ENRepairs

12 Repairs
If the actuator does not function properly according to how it was originally sized ordoes not function at all, it is defective andmust be repaired or exchanged.
! NOTICE
Risk of actuator damage due to incorrect
service or repair work.
Î Do not perform any repair work on yourown.
Î Contact SAMSON's After-sales Service
for repair work.

12.1 Returning devices to
SAMSON
Defective devices can be returned to
SAMSON for repair.
Proceed as follows to return devices:− Completed Declaration on Contamination, which can be downloaded
from our website atu www.samsongroup.com > Service> After-sales Service.
After checking your registration, we will
send you a return merchandise authorization (RMA).
3. Attach the RMA (together with the
Declaration on Decontamination) to theoutside of your shipment so that the
documents are clearly visible.
4. Send the shipment to the address givenon the RMA.
Note
Further information on returned devices andhow they are handled can be found at
u www.samsongroup.com > Service > Aftersales Service.

1. Exceptions apply concerning some special device models
u www.samsongroup.com > Service >After-sales Service.
2. Send an e-mailu returns-de@samsongroup.com toregister the return shipment including thefollowing information:− Type− Article no.
− Configuration ID− Original order

EB 8310-1 EN

12-1

12-2

EB 8310-1 EN

Disposal

13 Disposal
SAMSON is a producer registeredat the following European institution
u https://www.ewrn.org/nationalregisters/national-registers.
WEEE reg. no.: DE 62194439/
FR 02566

Î Observe local, national and international refuse regulations.
Î Do not dispose of components, lubricantsand hazardous substances together withyour household waste.
Note
We can provide you with a recycling passport according to PAS 1049 1) on request.
Simply e-mail us ataftersalesservice@samsongroup.com giving
details of your company address.
Tip
On request, we can appoint a service provider to dismantle and recycle the product aspart of a distributor take-back scheme.

1)

PAS 1049 is relevant to electrical andelectronic equipment (e.g. electric actuators).
This PAS specification does not apply to nonelectrical equipment.

EB 8310-1 EN

13-1

13-2

EB 8310-1 EN

Certificates

14 Certificates
The declarations of incorporation in compliance with Machinery Directive 2006/42/EC
and the Directive 2008 No. 1597 Supply of
Machinery (Safety) Regulations 2008 forType 3271-5 and Type 3277-5 Pneumatic
Actuators with 120 cm² actuator areas areprovided on the following pages.
The certificates shown were up to date at thetime of publishing. The latest certificates canbe found on our website:− u www.samsongroup.com > Products >Actuators > 3271
− u www.samsongroup.com > Products >Actuators > 3277
Other optional certificates are available on
request.

EB 8310-1 EN

14-1

14-2

EB 8310-1 ENDeclaration of Incorporation of Partly Completed Machineryin accordance with Schedule 2 Part 2 Annex II, section 1.B. of the Directive 2008 No. 1597
Supply of Machinery (Safety) Regulations 2008
For the following product:
Type 3271 and Type 3277 Actuators
We certify that the Type 3271 and Type 3277 Actuators are partly completed machinery as defined in the in
Directive 2008 No. 1597 Supply of Machinery (Safety) Regulations 2008 and that the safety requirements stipulated in Annex I, 1.1.2, 1.1.3, 1.1.5, 1.3.2, 1.3.4 and 1.3.7 are observed. The relevant technical documentation
described in Annex VII, (Part 7 of Schedule 2) part B has been compiled.
Products we supply must not be put into service until the final machinery into which it is to be incorporated has
been declared in conformity with the provisions of the Directive 2008 No. 1597 Supply of Machinery (Safety)
Regulations 2008.
Operators are obliged to install the products observing the accepted industry codes and practices (good engineering practice) as well as the mounting and operating instructions. Operators must take appropriate precautions to prevent hazards that could be caused by the process medium and operating pressure in the valve as
well as by the signal pressure and moving parts.
The permissible limits of application and mounting instructions for the products are specified in the associatedmounting and operating instructions; the documents are available in electronic form on the Internet atwww.samsongroup.com.
For product descriptions refer to:
Types 3271 and 3277 Actuators: Mounting and Operating Instructions EB 8310-X
Referenced technical standards and/or specifications:
VCI, VDMA, VGB: "Leitfaden Maschinenrichtlinie (2006/42/EG) – Bedeutung für Armaturen, Mai 2018"[German only]
VCI, VDMA, VGB: "Zusatzdokument zum Leitfaden Maschinenrichtlinie (2006/42/EG) – Bedeutung für
Armaturen vom Mai 2018" [German only], based on DIN EN ISO 12100:2011-03
Comments:
See mounting and operating instructions for residual hazards.
Also observe the referenced documents listed in the mounting and operating instructions.

Persons authorized to compile the technical file:
SAMSON AG, Weismüllerstraße 3, 60314 Frankfurt am Main, Germany
Frankfurt am Main, 13 December 2021

Stephan Giesen

Director
Product Management

Peter Scheermesser

Director
Product Life Cycle Management and ETODevelopment for Valves and Actuators

Revision 00
Classification: Public · SAMSON AKTIENGESELLSCHAFT · Weismuellerstrasse 3 · 60314 Frankfurt am Main, Germany

EB 8310-1 EN

Page 1 of 1

14-3

14-4

EB 8310-1 EN

Annex15 Annex
15.1 Tightening torques, lubricants and toolsu AB 0100 for tools, tightening torques and lubricants

15.2 Spare parts
1

Top diaphragm case

68

Axial needle seal

2

Bottom diaphragm case

69

Shim

2.1

Switchover or connecting plate 1)

76

Radial shaft seal

4

Diaphragm

77

Dry bearing

5

Diaphragm plate (two-piece)80

Handwheel

7

Actuator stem

134

Washer8

Ring nut

135

Diaphragm plate (two-piece)10

Spring

138

Pin

11

Spring139

Retaining washer

15

Collar nut

160*

Dust shield (option)

16

Vent plug

191

Pin

20

Hex bolt

192

Threaded bushing21

Hex nut

193

Sliding washer

25

Washer194

Retaining ring

26/27 Stem connector clamps

195

Washer27.1

Stem connector nut 2)

196

Cover

27.3

Lock nut 2)

197

Cover

28

Clamp with bracket

206

Seal

29

Hex bolt

207

Filter30

Hex nut

300

Screw plug

40

Radial shaft seal

307

Screw plug

41

Wiper ring

308

Protective cap

42

Dry bearing

FA

Actuator stem extends

44

Stop bushing

FE

50

Shaft

1)

51

Sleeve52

Bearing sleeve

58

Sliding washer

65

Cap screw

EB 8310-1 EN

2)Actuator stem retracts
Type 3277 only
Only in version for micro-flow valve

15-1

193
65
195

194

Z

307

80
192

Z

52

58

191

68
69

51
50

A
76
77

15

10
11

300

1
135
4
5

20
25
21
308
160*

2
40

16

FE

FA

134
42

8

44
41

29

7

28

26/27
30

Type 3271-5 Actuator

A-A

197
139

138
139
196

15-2

EB 8310-1 EN

2
42

27.3

160*
8

41

27.1

Micro-flow valve version

FA

40

206

7

42
2.1
2

X

X

FE

160*

42

26/27

8
207

41

Type 3277-5 Actuator

EB 8310-1 EN

15-3

Annex15.3 After-sales service
Contact our after-sales service for support
concerning service or repair work or whenmalfunctions or defects arise.
E-mail address
You can reach our after-sales service ataftersalesservice@samsongroup.com.
Addresses of SAMSON AG and its subsidiaries
The addresses of SAMSON AG, its subsidiaries, representatives and service facilities
worldwide can be found on our website(www.samsongroup.com) or in all SAMSON
product catalogs.
Required specifications
Please submit the following details:

15.4 Information on the UK
sales region
The following information corresponds to the2016 Regulations No. 1105 Pressure Equipment (Safety) Regulations 2016, STATUTORYINSTRUMENTS, 2016 No. 1105 (UKCA
marking). It does not apply to Northern Ireland.
Importer
SAMSON Controls Ltd
Perrywood Business Park
Honeycrock Lane
Redhill, Surry RH1 5JQ
Phone: +44 1737 766391
E-mail: sales-uk@samsongroup.com
Website: uk.samsongroup.com− Order number and position number inthe order− Type, model number, actuator area,
travel, direction of action and benchrange (e.g. 0.2 to 1 bar) or theoperating range of the actuator− Type designation of mounted valve (ifapplicable)− Installation drawing

15-4

EB 8310-1 EN

SAMSON AKTIENGESELLSCHAFT
Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany
Phone: +49 69 4009-0 · Fax: +49 69 4009-1507
samson@samsongroup.com · www.samsongroup.com

2024-07-25 · English

EB 8310-1 EN