The BURKERT 20108317 Type 8640 valve unit system is designed to solve diverse and complex control problems due to its systematic modular construction and combination of pneumatic and electrical interfaces. By putting together a row of pneumatic modules with different numbers of valves, 2 to 24 valve functionalities may be realized on one valve unit. Electrical connectivity is achieved by either fieldbus interfaces, common connection (parallel connection technique) or multipin interfaces. The valves allow different applications to be covered. Bodies and connection modules are made of high-quality plastic (polyamide) and are easy to assemble by means of the built-in snap connectors.

The specific 20108317 configuration features an 11 mm width per station, 8x (2x 3/2) valve function C C, a D3/8 pressure port, and a collective socket module. It operates within a pressure range of 2.5 to 10 bar and a medium temperature of 0 to 50 °C, providing an IP20 degree of protection.

General Technical Data

Product properties	Type 0460, Type 6524, Type 6525	Type 6526, Type 6527	Type 5470
Body Material	PA (polyamide), aluminium (Type 0460)	PA (polyamide), aluminium	PA (polyamide)
Seal Material	FKM, NBR and PUR	NBR	NBR
Width per station	11 mm	16.5 mm	19 mm
Manual override	Standard	Standard	Standard
Number of valve slots	Max. 24	Max. 24	Max. 24
Pressure range	Vac...10 bar	Vac...10 bar	Vac. 2...10 bar
Operating voltage	24 V DC (±10%)	24 V DC (±10%)	24 V DC (±10%)
Operating medium	Oil-free or lubricated compressed dry air, neutral gases	Oil-free or lubricated compressed dry air, neutral gases	Oil-free or lubricated compressed dry air, neutral gases
Degree of protection	IP20 / IP65 in closed control cabinets	IP20 / IP65 in closed control cabinets	IP20 / IP65 in closed control cabinets

Pilot Valve Options

The Type 8640 modular valve island can be equipped with various pilot valves depending on the application requirements.

Solenoid valves Type 6524 and Type 6525

The pilot valves Type 6524 (single and double valve) and Type 6525 (single valve) consist of a pilot flipper solenoid valve Type 6144 and a pneumatic seat valve. The circuit function allows switching of high pressures with low power consumption and short switching times.

Solenoid valves Type 0460

The solenoid valve Type 0460 consists of a pneumatic valve body fitted with a double coil pilot valve. The principle allows switching of high pressures together with low power consumption and fast switching times.

Solenoid valves Type 6526 and Type 6527

The solenoid valve Type 6526 and Type 6527 consist of a pneumatic valve body fitted with a Type 6106 rocker solenoid valve.

Solenoid valve Type 5470

The solenoid valve Type 5470 consists of a pneumatic valve body fitted with Type 6106 rocker pilot valve. An armature with a tilting bearing, similar to a rocker, tilts within the body of the pilot valve, and switches the valve. The minimal tilting movement of the rocker is non-wearing, and basic lubrication is unnecessary.

AirLINE Quick Adapter

AirLINE Quick considerably reduces the use of components in the control cabinet. With the AirLINE Quick Adapter, the valve terminal is adapted directly to the control cabinet floor or control cabinet wall.

Advantages:

• Reduced space requirement in the control cabinet
• This makes it possible to use more compact control cabinets
• Reduced installation effort due to hose connections directly at the bottom of the control cabinet

WARNING

Type 0460 valves cannot be installed with AirLINE Quick due to their size.

Circuit Functions

• Circuit function C (CF C): 3/2-way solenoid valve, servo-controlled, with manual override, normally closed.
• Circuit function D (CF D): 3/2-way solenoid valve, servo-controlled, with manual override, normally open.
• Circuit function H (CF H): 5/2-way solenoid valve, servo-controlled, with manual override. Pressure applied via port (1), therefore one of the two ports (2) or (4) is under pressure.
• Circuit function L (CF L): 5/3-way solenoid valve, with manual override. In middle position all ports locked.
• Circuit function N (CF N): 5/3-way solenoid valve, with manual override. In middle position ports 2 and 4 exhausted.
• Circuit function Z (CF Z): 5/2-way solenoid valve, impulse variant with 2 coils and manual override.

Product Connections

Collective connection module: Connection via individual stranded wires, looped-through ground potential, max. 24 valves, degree of protection IP20, screw-type terminals.

Multi-pin module Valve outputs: Max. 24 valves, degree of protection IP20, electrical connection plug D-Sub (2-pin).

Fieldbus modules: Available for PROFIBUS DP, PROFINET IO, EtherNet/IP, and Modbus TCP. Supports max. 24 valves and max. 32 digital inputs.

Structure and Installation (Type 5470 Example)

Manual Override

To operate the valve manually, press the manual override and turn it 90° clockwise (until it stops). The manual override is locked and does not reset automatically.

DANGER

Only operate the manual override when the power is off.

Installing Multiple Blocks

1. Begin installation with connection module on the left.
2. Check modules for complete installation with 2 O-rings each.
3. Lightly oil or grease all O-rings before engaging.
4. Engage the lower latch hooks of the module to be attached in the latch grooves of the preceding module. Make sure that the O-rings are properly seated.
5. Press the module to be locked upwards slightly and engage the upper latch hook.
6. Insert 3 O-rings into the recess on the back of the valve and ensure that the seal is properly fitted.

WARNING

Crushed O-rings and profile seals lead to leaky blocks.

Valve Block Installation

Standard rail installation:

1. Hook the valve block with the upper groove into the standard rail (35 x 15 or 35 x 7.5 EN 50022).
2. Snap the lower clamping pieces into the standard rail.
3. Tighten the screws on the clamping pieces.

Maintenance and Troubleshooting

Fault	Possible cause	Remedy
Valves do not switch	No operating voltage or operating voltage too low	Check electrical connection. Ensure operating voltage according to type label.
	Manual override not in zero position	Bring manual override to zero position.
	Pressure supply insufficient or not available	Set up large-volume pressure supply. Minimum operating pressure ≥ 2 bar.
Valves switch with a delay or blow off at the exhaust ports	Pressure supply insufficient or not available	Set up large-volume pressure supply. Minimum operating pressure ≥ 2 bar.
	Valves are not in the home position (de-energised) during pressure build-up	Apply pressure to the valve block before the valves are switched.
	Insufficient ventilation of the exhaust air ducts due to too small or dirty silencers	Use suitably sized silencers or expansion vessels. Clean the dirty silencers.
	Impurities or foreign matter in the pilot or pneumatic valve	Apply pulsed pressure to the exhaust air ducts to blow out the impurities. Install a new pilot or pneumatic valve.
Leaky valve blocks	Missing or crushed O-rings between the modules	Identify leak or missing seals.
	Missing or incorrectly positioned flat seals between valve and base plate	Insert missing seals or replace damaged seals.