Series 48
OPERATION
288914ED
Edition 2013-05-24
17/27
5.3
Bake-out
Inside under vacuum pressure
10
-5
mbar to prevent oxidation.
compact
extended
Valve:
≤ 200 °C in open and
closed position
≤ 300 °C in open and
closed position
Actuator: standard:
≤ 200 °C for max.100 h
*
≤ 200 °C for max.100 h
*
option:
10
6
Gy (10
8
rad)
≤ 140 °C for max.100 h
*
≤ 140 °C for max.100 h
*
option:
10
8
Gy (10
10
rad)
≤ 200 °C
*
≤ 200 °C *
Position
indicator:
standard:
≤ 80 °C
≤ 80 °C
option: 200 °C
≤ 200 °C
≤ 200 °C
Solenoid:
≤ 80 °C
≤ 80 °C
Heating and cooling rate:
DN 16
– 40
DN 63
–160
DN 200
–320
–
≤ 50 °C / h
≤ 25 °C / h
≤ 80 °C / h
≤ 50 °C / h
≤ 25 °C / h
Table 5-3
*
Applied high temperatures and radiation exposure are weakening the sealing materials of
the actuator. A combination of both will shorten the lifetime.
5.4
Behavior in case of air pressure drop
Valve closed:
Valve remains closed and leaktight.
Valve open:
Valve position is undefined.
Option
– actuator mechanically locked in position open:
Valve remains open.
5.5
Behavior in case of power failure
Standard solenoid:
Valve closes.
Impulse solenoid (option): Valve position does not change. A started movement will
continue to the end.
5.5.1
Manual emergency operation
WARNING
Movable parts
Human body parts may get jammed and severely injured.
Keep human body parts away from movable parts.
