Installation, Operating & Maintenance Instructions
Series 48.2, DN 63-160 (I.D. 2 ½ - 6")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected]
www.vatvalve.com
273777ED
2007-03-30
11/19
3.5 Emergency operation at power failure (E4Gy)
Solenoids with an emergency operation (slotted screw) to operate the valve in case of a power failure (with com-
pressed air available)
Standard solenoid
To close the valve:
Turn the slotted screw counter-clockwise to its stop
To open the valve:
Turn the slotted screw clockwise to its stop
For remote operation make sure that the slotted screw is turned
counter-clockwise to its stop.
Solenoid for impulse actuation
To close the valve:
Turn the slotted screw (coil «closed») clockwise to its stop. If the valve
is closed, turn the screw back to its original position.
To open the valve:
Turn the slotted screw (coil «open») clockwise to its stop. If the valve
is open, turn the screw back to its original position.
For remote operation make sure that both slotted screws are turned
counter-clockwise to their stop (original position).
Radiation resistant solenoid
In case of a power failure, the solenoid can be removed and compressed air can be connected directly to the
connection plate.
4 Trouble
shooting
Failure Check Action
Power available?
Check voltage!
Compressed air available?
Check air pressure!
Valve mechanism does not move
Slotted screw in proper position?
Check slotted screw!
When operating at atmosphere:
(not recommended)
No reason for concern
Whistling sound during
opening/closing:
When operating at vacuum:
No reason for concern unless the
sound gets extensive
If you need any further information, please contact one of our service centers. You can find the addresses on our
website: http://www.vat.ch
