The BURKERT 20131276 (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.

Key advantages include a compact design, modular configuration, higher flexibility in the control cabinet due to AirLINE Quick, and simple exchange of valves (with option “P-shut-off” – also possible during operation).

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	24 (Max. 12 for impulse and double valves)	Max. 24	Max. 24
Pressure range	Vac...10 bar	Vac...10 bar	Vac. 2...10 bar
Operating voltage	24 V DC	24 V DC	24 V DC
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 system 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. They are equipped with a manual override as standard.

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

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. The circuit function allows high pressures to be switched with low power consumption and short switching times.

Solenoid Valve Type 5470

The solenoid valve Type 5470 consists of a pneumatic valve body fitted with a 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. Type 5470 R is available as a 3/2 and 4/2-way valve.

AirLINE Quick

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.

INFO

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

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

Product Design and Assembly

Electronics Assembly

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 Assembly

1. Pneumatic connection module, left
2. Basic pneumatic modules
3. Pneumatic connection module, right
4. Valves (for example 5/2-way)

Installation and Maintenance (Type 5470 Configuration)

Structure and 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.

WARNING

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:

• Hook the valve block with the upper groove into the standard rail.
• Snap the lower clamping pieces into the standard rail.
• Tighten the screws on the clamping pieces.

Wall installation:

• Fasten the valve block directly to the wall with M4 screws.

Pneumatic Installation

DANGER

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.

• Check the hose lines for contamination and clean them.
• If necessary, install dirt traps upstream of the valve inlet (≤ 5 µm).
• 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.
• Connect the supply and working lines to the valve block.