Type

8640

Modular valve island for pneumatics with width per station 33 mm

Operating instructions

We reserve the right to make technical changes without notice.
Technische Änderungen vorbehalten.
Sous réserve de modifications techniques.
© Bürkert Werke GmbH & Co. KG, 2024
Operating Instructions 2402/15_EUen_00803150 / Original DE

Type 8640
Contents﻿
1

OPERATING INSTRUCTIONS................................................ 4
1.1 Symbols........................................................................ 4
1.2 Definition of terms........................................................ 4

8

INSTALLATION..................................................................... 15
8.1 Pneumatic installation................................................ 15
8.2 Electrical installation................................................... 16

2

INTENDED USE..................................................................... 59START-UP............................................................................. 17

3BASIC SAFETY INSTRUCTIONS........................................... 5

10 MAINTENANCE, TROUBLESHOOTING.............................. 174

GENERAL NOTES.................................................................. 7
4.1 Contact address........................................................... 7
4.2 Information online......................................................... 7

5

STRUCTURE AND DESCRIPTION........................................ 7
5.1 3/2 or 5/2-way valve..................................................... 7
5.2 Description................................................................... 8
5.3 Design of 5/3-way valve, 5/2-way pulse valve............. 9
5.4 Circuit functions........................................................... 9

11 DISASSEMBLY..................................................................... 18
11.1 Valve block disassembly............................................ 19
11.2 Disassembling multi-blocks....................................... 19
11.3 Disassembling hose lines........................................... 19

6

TECHNICAL DATA................................................................ 10
6.1 Conformity.................................................................. 10
6.2 Standards................................................................... 10
6.3 Operating conditions.................................................. 10
6.4 Electrical data............................................................. 10
6.5 Type label................................................................... 11

7

INSTALLATION..................................................................... 11
7.1 Mounting pilot valve type 6014.................................. 12
7.2 Installing multiple blocks............................................ 13
7.3 Valve block installation............................................... 14

12 RIGHT CONNECTION MODULE......................................... 19
13 PULSED OPERATION.......................................................... 19
14 TRANSPORTATION, STORAGE, DISPOSAL....................... 19

English3

Type 8640
Operating Instructions

1

OPERATING INSTRUCTIONS

The operating instructions describe the entire life cycle of thedevice. Keep these instructions ready to hand at the operation
site.
Important safety information!
▶ Carefully read these instructions.
▶ Above all, observe the safety instructions, intended use andusage conditions.
▶ Persons who work on the device must read and understandthese instructions.

1.1

Symbols
DANGER!

Warns of an immediate danger.
▶ Failure to observe will result in death or serious injuries.
WARNING!
Warns of a potential danger.
▶ Failure to observe these warnings may result in serious injuries or death.
CAUTION!
Warns of a potential hazard.

▶ Failure to observe may result in moderate or minor injuries.

4

EnglishNOTE!
Warns of damage.
Important tips and recommendations.
Designates instructions to avoid danger.
Highlights a procedure which you must carry out.

1.2
Term
DeviceDefinition of terms
Definition for these instructions
Valve island type 8640

Type 8640
Intended use

2

INTENDED USE

The valve island type 8640 with valves types 6518 and 6519
is designed to control neutral media and compressed air.
▶ The device must only be used for its intended purpose.
Non-intended use of the device may be dangerous to people, nearby equipment and the environment.
▶ Use the device only in conjunction with third-party devices andcomponents recommended or approved by Bürkert.
▶ Prerequisites for safe and trouble-free operation include
correct transportation, correct storage, installation, start-up,
operation and maintenance.
▶ Observe the permissible data, operating conditions and conditions of use of the respective devices or products. These
specifications can be found in the contract documents, theoperating instructions and on the type label.
▶ With a properly connected and mounted cable plug, e.g.
Bürkert type 2518, the device fulfils degree of protection IP65
according to DIN EN 60529 / IEC 60529.

3

BASIC SAFETY INSTRUCTIONS

These safety instructions do not take into account any coincidences or events occurring during installation, operation andmaintenance. The operator is responsible for observing the location-specific safety regulations, also with reference to personnel.

Risk of injury due to high pressure and escaping medium.
▶ Switch off the pressure before working on the device orsystem. Vent or drain the pipes.
Risk of injury due to electric shock.
▶ Switch off voltage before working on the device or system.
Secure against reactivation.
▶ Observe any applicable accident prevention and safety regulations for electrical devices.
Risk of injury from quickly accelerating device parts andunconnected compressed air hoses flapping around.
▶ Before applying pressure to the valve, check all hose connections and fittings for tight, secure fit.
Risk of burns or fire from hot device surfaces due to longer
duty cycles.
▶ Only touch the device when wearing protective gloves.
▶ Keep the device away from highly flammable substancesand media.
Risk of injury from malfunctioning valves with alternating
current (AC)A seized core causes the coil to overheat, which leads to functional failure.
▶ Monitor the working process for proper function.

English5

Type 8640
Intended use
General hazardous situations.

NOTE!

To prevent injuries, observe the following:▶ Observe the general rules of technology.
▶ In the potentially explosive atmosphere, only use devices
that are approved for this purpose. These devices are identified by a separate “Ex” type label. Before use, note the information on the separate Ex type label and the Ex additional
instructions or the separate Ex operating Instructions.
▶ Use the device only when it is in perfect condition and inaccordance with the operating instructions.
▶ Secure the device or system to prevent unintentional
activation.
▶ After an interruption in the power supply, ensure that theprocess is restarted in a controlled manner.
▶ Do not modify the device.
▶ Do not mechanically load the device.
▶ Only trained technicians may perform installation and maintenance work.
▶ Install the device according to the regulations applicable in
the respective country.

Electrostatically sensitive components and assemblies.

6

EnglishThe device contains electronic components that are susceptible to the effects of electrostatic discharging (ESD). Components that come into contact with electrostatically charged
persons or objects are at risk. In the worst case scenario,
these components will be destroyed immediately or fail after
start-up.
▶ Meet the requirements specified by EN 61340-5-1 to minimise or avoid the possibility of damage caused by sudden
electrostatic discharge.
▶ Do not touch electronic components when the supply voltage is connected.

Type 8640
General notes

4

GENERAL NOTES

4.1

Contact address

5

STRUCTURE AND DESCRIPTION

5.1

3/2 or 5/2-way valve

Germany
Bürkert Fluid Control Systems
Sales Centre
Christian-Bürkert-Str. 13-17
D-74653 IngelfingenTel. +49 (0) 7940 - 10-91 111
Fax +49 (0) 7940 - 10-91 448
Email: info@burkert.com

1
1

2
3

2

International
Contact addresses can be found on the final pages of the printed
operating instructions.
They are also available online at: https://country.burkert.com.

4.2

4

3

4

4

Information online

Operating instructions and data sheets for Bürkert products canbe found on the Internet at: https://country.burkert.com.

Type 6518

Type 6519

Fig. 1:

Valve assembly 3/2 or 5/2-way valve

Item
1
2
3
4

Designation
Pilot control
Manual override (see Chapter “5.1.2 Manual override”)
Pilot pressure port
Working port

English7

Type 8640
Structure and description

5.1.1

Compatible pilot controls

Solenoid

AC08

Cable plug
2507

2516

DesignB

5.1.3
FigureC

Connections

The connections are marked with numbers for better assignment.
Connection number

Designation

1

Pressure port

2 and 4

Working port

3 and 5

Exhaust port

12 and 14

Pilot pressure port

5.2

Description

The valves consist of:• 3/2-way pilot valve (type 6014) with different electrical connection variants.
AC10

2518

Pilot valve coil can be locked in 4 x 90° steps, in between it
can be positioned as desired around the core guide tube.

A• Valve body with diaphragm and seat seals (3/2 and 5/2-way
valve) or slide (5/3-way valve).
• Working ports 2 (B) / 4 (A) with G1/4 internal thread.

5.1.2• Supply and exhaust port 1 (P) / 3 (R) / 5 (S) with G1/4 internal
thread.

Manual override→ To operate the valve manually, press the manual override andturn it 90° clockwise (until it stops). The manual override islocked and does not reset automatically.
→ Only operate the manual override when the power is off.

8

EnglishThe valves can be mounted on the modular, pneumatic type
MP07 base rails to form valve blocks. Any installation position,
preferably with solenoid actuator on top.
The cable plug is used to control DC and AC coils withpower ratings up to 7 W without external power supply.

Type 8640
Structure and description

5.3

Design of 5/3-way valve, 5/2-way
pulse valve

5.4

Circuit functions
C, 3/2-way valve (*for vacuum 1),
with auxiliary pilot air)

2(A)
12

1
2

1(P)

3(R)

12
1(P)

3
4
5

3(R)

*Vacuum, with auxiliary pilot air

D, 3/2-way valve

2(B)
10
1(P)

1
2

In idle position, pressure port 1 (P/NC)
closed, working port 2 (A/OUT) open
after port 3 (R/NO).

2(A)

4

In idle position, pressure port 1 (P/NO) ope after working port 2 (B/OUT),
port 3 (R/NC) closed.
H, 5/2-way valve

3(R)

2

14

In idle position pressure port 1 (P)after working port 2 (A) open, working
port 4 (B) after port 5 (S) open, port 3(R) closed.
Z, 5/2-way valve

12
5 1 3

Type 6519
Fig. 2:

Design of 5/3-way valve (slide valve with metal body), 5/2-way
pulse valve

Item
1
2
3
4
5

Designation
Pilot valve
Cable plug
Exhaust port 5
Pressure port 1
Exhaust port 3

4

2

14

Pulse variant (2 coils)

12
5 1 3
4

2

14

12
5 13

L, 5/3-way valve
In the centre position, all connections
are closed. Pressure port at 1.
Working ports at 4 and 2. Vent theworking ports after 5 or 3.

English9

Type 8640
Structure and description

4

2

14

12
5 13

N, 5/3-way valve
In the middle position, pressure port
1 (P) closed, both working ports 2 (A)and 4 (B) open after outlet 3 (R) or 5
(S).

Ambient temperature
Medium temperature
Medium1) The vacuum generator must be connected to port 1.

6

TECHNICAL DATA

6.1

Conformity

Operating pressure
range

The device conforms to EU directives as per the EU Declarationof Conformity.

6.2

Standards

6.3.1

Materials

Sealing materials depend on the body materials:
Body material

PA

AL

Seal material

NBR, PUR

NBR, FKM

The applied standards which are used to demonstrate compliance with the EU Directives are listed in the EU-Type Examination Certificate and/or the EU Declaration of Conformity.

6.4

6.3

Electrical connection

Operating conditions

Electrical data

NOTE!
Pilot pressure for pneumatic control depends on the pressureof the flow medium; it must be between 2...8 bar (at least
70% of operating pressure).
NOTE!
Pressure difference between port 1 and 3/5 at least 2 bar

Additional electricalconnection options
Voltage tolerance
Degree of protection
Cable plug

10

English–10 ... +55 °C–10 ... +50 °C• Filtered compressed air (particle
size max. 10 µm), preferably unlubricated (operation with lubricated air ispossible)• neutral gases
2 ... 10 bar(2 ... 16 bar variable Code RN16)

Cable plug type 2516 or 2518 on theplug contacts of the coil (torque forfastening: 0.5 to 0.6 Nm).
Type 6014 or 8640
±10 %
IP65
Only in connection with cable plugcan be mounted offset by 4 x 90° forthe cable outlet selected.

Type 8640
Installation

7

NOTE!
Damage to the appliance when screwing the cable plug.
▶ Make sure that the flat seal is seated properly.

Type label
Made in Germany

6.5

2W

1
2
3

W1YMG

4

6519 H 9,0
G1/4 PN2–8bar
230V 50–60Hz

00174395

Fig. 3:

Example of type plate of pilot-operated solenoid valve type
6519

Item
1

Text
6519
H
9.0
G1/4
PN 2–8bar
230V
50–60Hz
2W
00174395
W1YMG

2

3

4

Designation
Type
Circuit function
Orifice
Connection typeOperating pressure range

INSTALLATIONWARNING!

Risk of injury due to improper installation.
▶ Only trained technicians may perform installation work.
▶ Perform installation work using suitable tools only.
Risk of injury from quickly accelerating device parts andunconnected compressed air hoses flapping around.
▶ Before applying pressure to the valve, check all hose connections and fittings for tight, secure fit.
Risk of injury due to unintentional activation of the system
and uncontrolled restart.
▶ Secure the system against unintentional activation.
▶ Following installation, ensure a controlled restart.
Prior to installation→ Clean the pipes.
→ If necessary, attach dirt trap upstream.
→ Do not use the coil as a lever when screwing in theconnections.

VoltageFrequency
Capacity
Article number
Manufacture code (encrypted)

English11

Type 8640
Installation

7.1

Mounting pilot valve type 6014

3

WARNING!

4

Risk of injury due to leaking valve.
▶ Make sure that the O-rings/seals are correctly seated in thevalve.

2

7

Overheating, risk of fire.

9

Without a pre-installed valve, connecting the coil will cause
overheating and destroy the coil.
▶ Only connect the coil after the valve has been installed.

8

Danger of electric shock if the coil is installed incorrectly.
▶ When installing, make sure that the coil is firmly seated on the
housing lid so the protective conductor connection of the coil
is connected to the valve body.

1

NOTE!

Fig. 4:

Do not use the coil as a lever arm when screwing it in.

Item Designation

Installing pilot valve types 6519

→ Screw the body of the pilot valve onto the pneumatic valve.
Observe the maximum tightening torque of 1.5 Nm.

1Pneumatic valve

2

Pilot valve→ Place the lid on the body.

3

Nut→ Fit the O-ring onto the core guide tube.

4

Solenoid→ Position the coil onto the core guide tube. The coil can berotated 4 x 90° (with block installation only 2 x 180°).

5O-ring→ Fasten the coil nut with an open-end wrench. Observe a
maximum tightening torque of 5 Nm.

6Core guide tube

7

Housing lid

8

Manual override

9

Body

12

English5
6

Type 8640
Installation

7.2

Installing multiple blocks
1

2

3

4

5

6

Item

7

6

Designation

8

Venting the pilot control

9O-ring

10

Profile seal

→ Begin installation with connection module on the left (see “Fig.
5”)→ Check modules for complete installation. 1 O-ring perconnection.
→ Lightly oil or grease all O-rings before engaging.
→ Engage the latch hooks of the module to be attached in thelatch grooves of the preceding module. Make sure that the
O-rings are properly seated.
max
1,5 NmFig. 5:

Item

10 9

8

Example of a multi-block with type 6519 valves

Designation

1

Left connection module2

Latch tab3

Latch hook4

Base modules 3-fold5

Supply channels 1(P), 3(S), 5(R)6

Right connection module (Intermediate supply)

7

Base modules 2-fold→ Ensure the profile seals are correctly seated on the basemodule.
Crushed O-rings and profile seals lead to leaky blocks.
→ Fasten each valve to the base module with 2 M4 screws.
Observe a maximum tightening torque of 1.5 Nm.

English13

Type 8640
Installation

7.3

Valve block installation

7.3.1

Standard rail installation→ Hook the valve block with the upper groove into the standard
rail.

1

→ Snap the lower clamping pieces into the standard rail.
→ Tighten the screws on the clamping pieces.
Standard rail
• Standard rail 35 x 15 DIN 50022 (standard)3• Standard rail 75 x 25 DIN 50023
When using the standard rail 75 x 25 DIN 50023, reposition the pre-installed screws accordingly with clamping
pieces and springs.

4
2

7.3.2

→ Fasten the valve block directly to the wall with M5 screws.

5Type 6519
Fig. 6:

Item
1
2
3
4
5
14

Wall installation

Mounting the valve block

Designation
Electrical connection can be rotated 180°
Wall mountStandard rail 35 x 15 DIN 50022
Standard rail 75 x 25 DIN 50023
Connection module

EnglishType 8640
Installation

8

INSTALLATIONWARNING!

Risk of injury due to improper installation▶ Only trained technicians may perform installation work.
▶ Only carry out installations with suitable tools.
Risk of injury due to unintentional activation of the system
and uncontrolled restart.
▶ Secure the system against unintentional activation.
▶ Following installation, ensure a controlled restart.

8.1

Pneumatic installation
DANGER!

Risk of injury due to high pressure and escaping medium.
▶ Switch off the pressure before working on the device orsystem.
Vent or drain the pipes.
DANGER!
Risk of injury from quickly accelerating device parts andunconnected compressed air hoses flapping around.
▶ Before applying pressure to the valve, check all hose connections and fittings for tight, secure fit.

Before connection→ Check the hose lines for contamination and clean them.
→ If necessary, install dirt traps upstream of the valve inlet (≤500 µm).
Pneumatic connection:
NOTE!
Note the assignment of the connections (see Chapter “5.1.3
Connections”)→ Push the hose lines into the push-in connections of thesolenoid valves until they come to a stop.
→ Use PTFE tape or elastomer seal for sealing.
→ Align hose lines→ Connect the supply and working lines to the valve block.
Requirements for hose lines• Minimum hardness 40 Shore D (according to DIN 53505 or
ISO 868).
• Outer diameter according to DIN 73378 (maximum permissible deviation ± 0.1 mm from nominal dimension).
• Burr-free, cut off at right angles and undamaged on the outer
diameter surface.

Installation position of the valves:• any, preferably solenoid actuator on top

English15

Type 8640
Installation

8.2

Electrical installation

8.2.1

Electrical installation of cable plugs
1

DANGER!
Risk of injury due to electric shock.
▶ Switch off voltage before working on the device or system.
Secure against reactivation.
▶ Observe any applicable accident prevention and safety regulations for electrical devices.

2

If there is no protective conductor contact between the coil andthe housing, there is a risk of electric shock!
▶ Always connect the protective conductor.
▶ Check electrical continuity between coil and body.

Observe maximum
tightening torquevalue!

→ Make the electrical connections to the pilot valves whileobserving the data on the type plate.
Fig. 7:Installation of cable plug

Item Designation
1
Seal
2
Approved cable plug e.g. type 2518 or other according
to DIN ISO 175301-803 Form A→ Screw on the cable plug (see data sheet for approved types),
observing the maximum tightening torque of 0.5 to 0.6 Nm.
→ Check that the seal is correctly fitted.
→ Connect the protective conductor and check electrical continuity between coil and body (see “Tab. 1”).

16

EnglishType 8640
Maintenance, troubleshooting

10

NOTE!
If the screw is pointing upwards when installed, insert a seal
made of a material compatible with the process under thescrew head.
Resistance

Test voltage

Test current

Maximum
0.1 Ω

12 V

1A

Tab. 1:

9

Protective conductor function test values

START-UPWARNING!

Risk of injury due to improper operation.
▶ Prior to start-up, it must be ensured that the operating personnel are familiar with and fully understand the contents of
the operating instructions.
▶ Only authorised technicians may start up the device orsystem.

MAINTENANCE,TROUBLESHOOTINGWARNING!

Risk of injury if maintenance work is not carried out correctly.

▶ Only trained technicians may perform maintenance work.
▶ Perform maintenance work using suitable tools only.

Risk of injury due to unintentional activation of the system
and uncontrolled restart.
▶ Secure the system against unintentional activation.
▶ Ensure a controlled restart after maintenance is completed.
Fault
Valves do
not switch→ Check connections, voltage and operating pressure.
→ Observe data on the type label.
→ Check the correct assignment of connections 1 and 3 or 5. Do
not mix them up under any circumstances.
→ For electrical operation, unlock the manual override.

Possible cause
No operating voltage
or operating voltage
too low

RemedyCheck electrical connection
Ensure operating voltage
according to type label.
Manual override not in Bring manual override tozero position
zero position.
Pressure supply insuf- Set up large-volume
ficient or not available pressure supply (also for
upstream devices suchas pressure controllers,maintenance units, on/off
valves, etc.)
Minimum operatingpressure ≥ 2 bar

English17

Type 8640
Maintenance, troubleshooting
Fault
Valvesswitchwith adelay orblow offat theexhaustports

Possible cause
RemedyPressure supply insuf- Set up large-volume
ficient or not available pressure supply (also for
upstream devices suchas pressure controllers,maintenance units, on/off
valves, etc.)
Minimum operatingpressure ≥ 2 bar
Apply pressure to thevalve block before thevalves are switched.

Valves are not in
the home position(de-energised) during
pressure build-up
Insufficient ventilation Use suitably sizedsilencers or expansionof the exhaust airducts due to too small vessels. Clean the dirty
or dirty silencers (back silencers.
pressure)
Impurities or foreign
Apply pulsed pressure tomatter in the pilot or
the exhaust air ducts topneumatic valve
blow out the impurities.
Install a new pilot or pneumatic valve.

Fault
Leaky
valve
blocks11

Possible cause
Missing or crushed
O-rings between themodules
Missing or incorrectly
positioned flat seals
between valve andbase plate

RemedyIdentify leak or missing
seals
Insert missing seals or
replace damaged seals

DISASSEMBLYWARNING!

Risk of injury due to high pressure and escaping medium.
▶ Switch off the pressure before working on the device or system.
Vent or drain the pipes.
Risk of injury due to electric shock.
▶ Switch off voltage before working on the device or system.
Secure against reactivation.
▶ Observe any applicable accident prevention and safety regulations for electrical devices.
WARNING!
Risk of injury due to improper disassembly.
▶ Only trained specialist personnel may carry out the disassembly.
▶ Perform disassembly work using suitable tools only.
Risk of injury from dangerous fluids.
▶ Before loosening lines or valves, flush out hazardous media,
depressurise and drain the lines.

18

EnglishType 8640
Pulsed operation

11.1

Valve block disassembly→ Loosen the clamping screws (approx. 4 turns).
→ Remove the block upwards from the standard rail.

11.2

Disassembling multi-blocks→ Use the screwdriver to disengage the upper latch hook fromthe disassembly groove on the front side.

13
NOTE!

Observe pulse data on the type label. Avoid simultaneous
pulsing of both coils.
Valves can be reversed with the manual override.

→ Remove the sub-block/module from the side.

11.3

Disassembling hose lines→ To release the lines, push in the thrust collar and pull out thehose line.

12

RIGHT CONNECTION MODULE

Other application options:• Connection modules on the right can be used in special applications as sub-modules to build up several operating pressure
stages in one block.
• Makes additional feed possible for larger valve blocks (seechapter “Fig. 6: Mounting the valve block”).
NOTE!
If necessary, pierce the lateral predetermined breaking pointsof connections 1, 3 and 5, and those of the upper pilot vent.

PULSED OPERATION

Pulse-controlled solenoid valves work with two coils that are
switched alternatingly.

14

TRANSPORTATION, STORAGE,DISPOSAL

NOTE!
Damage in transit due to inadequately protected devices.
▶ Protect the device against moisture and dirt in shock-resistant packaging during transportation.
▶ Observe permitted storage temperature.
▶ Protect the electrical interfaces of the coil and the pneumaticconnections from damage by placing protective caps on them.
Incorrect storage may damage the device.
▶ Store the device in a dry and dust-free location.
▶ Storage temperature –40 … +80 °C.
Damage to the environment caused by device parts contaminated with media.
▶ Dispose of the device and packaging in an environmentally-friendly manner.
▶ Observe applicable disposal and environmental regulations.

English19

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