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
10/19
Closing of open valve
- without
solenoid:
•
before valve is closed
⎯
supply air pressure in opening direction
•
air supply to connection «close»
•
air release through connection «open»
- with standard solenoid:
•
release control voltage
- with impulse solenoid:
•
supply an impulse of specified control voltage to the coil for closing (pulse duration min. 50 ms)
-
with radiation resistant solenoid:
•
release control voltage from the solenoid coil „close“ and coil „open“.
3.2 Bakeout
extended compact
Valve:
≤
300°C in open and closed position
≤
200°C in open and closed position
Actuator:
≤
200°C for max. 200h
≤
200°C for max. 200h
Position indicator:
≤
80°C (option: 200°C)
≤
80°C (option: 200°C)
Solenoid
≤
80°C
≤
80°C
Heating and cooling rate:
50°C/h
50°C/h
Operate the valve only after the bake-out temperature has been stable for two hours. If actuation during bake-out is
required, the heating and cooling rate from 100°C to 200°C must not exceed 10°C/h.
Temperature differences exceeding 30°C throughout the valve are not allowed. They may affect the performance of
the valve.
3.3 Behavior in case of compressed air pressure drop
Valve closed:
valve remains closed and leaktight
Valve open:
valve position is undefined
3.4 Behavior in case of power failure
Standard solenoid: Valve closes
Solenoid for impulse actuation (option): Valve position does not change, a started movement will be completed.
Radiation resistant solenoid: Valve closes
