BURKERT 20061758 Type 8640 is a modular valve island for pneumatics with a width per station of 19 mm. The 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, multiple valve functionalities may be realized on one valve unit.

Features

• Compact design
• Modular configuration
• Simple exchange of valves

Structure and Description

The valves consist of a 3/2-way pilot valve (Type 6106), a valve body with diaphragm, seat seals, and A/B connection plates. The working ports 2 (B) / 4 (A) as well as supply connection and exhaust port 1 (P) / 3 (R) are available with internal thread, plug-in coupling, or pointed hose nipples. A manual override is provided for manual activation of the valve.

Item	Designation
1	Pilot valve Type 6106
2	Exhaust port 3
3	Pressure port 1
4	Working port 4
5	Working port 2
6	Manual override
7	Cable plug Type 2506

Technical Data

Operating Conditions

• Ambient temperature: -10 ... +55 °C
• Medium temperature: -10 ... +50 °C
• Medium: Filtered compressed air (particle size max. 10 μm), preferably unlubricated (operation with lubricated air is possible); neutral gases (5 μm filtering)
• Seal material: NBR
• Operating pressure range: 2 ... 10 bar

WARNING

Pilot pressure for the pneumatic control unit depends on the pressure of the flow medium; it must be between 2 ... 10 bar (at least 70% of operating pressure). Pressure difference between port 1 and 3 must be at least 2 bar. When temperatures are below 0 °C then operation is restricted to dried air.

Installation

The valves can be mounted on the modular, pneumatic type MP05 base rails to form valve blocks. Any installation position is possible, preferably with the solenoid actuator on top.

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.

Wall installation: Fasten the valve block directly to the wall with M4 screws.

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.

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.