Installation, Operating, and Maintenance Instructions
Series 08, DN 63 - 100 (2½" - 4")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
222687EC
2003-04-14
6/8
Emergency operation at power failure
In case of a power failure, the valve can be actuated according to the following instructions, provided that there is
compressed air available.
Standard solenoid
Solenoid for impulse actuation (option)
Emergency operation
(slotted screw)
Emergency operation
(slotted screw)
Coil «open»
Coil «closed»
5
1
3
To open the valve:
Turn clockwise
To close the valve:
Turn counter-clockwise
Attention!
Remote operation is only possible if the emergency
operation (slotted screw) is turned counter-clockwise to
its stop.
To open the valve:
Turn slotted screw of solenoid/coil «OPEN» counter-
clockwise to its stop. As soon as valve is open, turn
slotted screw back to its original position.
To close the valve:
Turn slotted screw of solenoid/coil «CLOSED»
counter-clockwise to its stop. As soon as valve is
closed, turn slotted screw back to its original position.
Attention!
Remote operation is only possible of both emergency
operations (slotted screws «OPEN» and «CLOSED»)
are turned clockwise to their stop (initial position).
Compressed air failure
Valve closed: valve remains closed
Valve open:
valve position is undefined
