BURKERT 20046486 Type 8640 modular valve island is designed to solve diverse and complex control problems through its systematic modular construction and combination of pneumatic and electrical interfaces. By putting together a row of pneumatic modules with different numbers of valves, multiple valve functionalities may be realized on one valve unit. Bodies and connection modules are made of high-quality plastic (polyamide) and are easy to assemble by means of the built-in snap connectors.

This specific 11 mm width per station, 2-bank valve block features a 2.5 to 10 bar nominal pressure range and IP20 protection. It is designed for DIN-rail installation and utilizes bottom-positioned working connections.

General Technical Data (11 mm Width)

Product properties	Type 0460, Type 6524, Type 6525
Body Material	PA (polyamide), aluminium (Type 0460)
Seal Material	FKM, NBR and PUR
Width per station	11 mm
Manual override	Standard
Number of valve slots	24 (Max. 12 for impulse and double valves)
Pressure range	Vac...10 bar
Flow rate QNn value air	200...300 l/min measured at +20 °C, 6 bar pressure at valve inlet and 1 bar differential pressure
Operating voltage	24 V DC (±10% tolerance)
Nominal power of each valve	For single valves: 0.8 W. For impulse and double valves: 2x0.8 W with power reduction
Degree of protection	IP20 (IP65 in closed control cabinets)
Working port	D 6, D 1/4
Air supply connection	G 1/4, D 3/8

Solenoid Valves (11 mm Width)

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.
• The pilot valves are equipped with a manual override as standard.

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.
• All valves are equipped with manual override as a standard.

Circuit Functions

Symbol	Description
C (CF C)	3/2-way solenoid valve. Servo-controlled, with manual override. Normally closed.
D (CF D)	3/2-way solenoid valve. Servo-controlled, with manual override. Normally open.
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.
L (CF L)	5/3-way solenoid valve. With manual override. In middle position all ports locked.
N (CF N)	5/3-way solenoid valve. With manual override. In middle position ports 2 and 4 exhausted.
Z (CF Z)	5/2-way solenoid valve. Impulse variant with 2 coils and manual override. Pressure applied via port (1), therefore one of the two ports (2) or (4) is under pressure.

Dimensions (11 mm Width per Station)

Dimensions in mm, unless otherwise stated.

Standard rail EN 50022 35 x 7.5 or 35 x 15:

Product Design and Assembly

Electronics

No.	Element
1	Electrical end module, left
2	Terminal module for feedback
3	Extension module for electrical inputs
4	Multi-pin digital inputs (initiators)
5	Electrical end module, left
6	Basic electrical module standard
7	Fieldbus module
8	Multipin valve outputs
9	Common connection module

Pneumatics (11 mm width per station)

No.	Element
1	Pneumatic connection module, left
2	Basic pneumatic modules
3	Pneumatic connection module, right
4	Valves (for example 5/2-way)

Installation Guidelines

WARNING

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.

TIP

Pilot pressure for pneumatic control unit depends on the pressure of the flow medium; it must be between 2 ... 10 bar (at least 70% of operating pressure).

• Pneumatic Connection: Push the hose lines into the push-in connections of the solenoid valves until they come to a stop. Use PTFE tape or elastomer seal for sealing the threaded connection.
• Hose Requirements: Minimum hardness 40 Shore D (according to DIN 53505 or ISO 868). Outer diameter according to DIN 73378. Burr-free, cut off at right angles and undamaged on the outer diameter surface.