Product data sheet
FieldQ
FieldQ
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FieldQ valve actuator
Failure modes
Valve rotation
Valves are normally manufactured so that:
1. The valve is closed
: after a clock wise rotation*
2. The valve is open
: after a counter clock wise
rotation*
*) = views from above
Position after a failure
The position of the actuator after a failure depends on:
1. Principles of operation
Spring Return or Double Acting
2. Actuator assembly code
See 1.606.03 for Double Acting
See 1.606.04 for Spring Return
3. Kind of failure. See table.
Closed
Open
1.606.02 Rev. 0
October 2017
Principle
of
operation:
Assembly code :
Kind
of
failure :
Position :
Double acting
actuator
CW
Pressure
not defined
Signal
Closed
Supply voltage
Closed
CC
Pressure
not defined
Signal
Open
Supply voltage
Open
Single act-
ing actuator
(Spring Return)
CW
Pressure
Closed
Signal
Closed
Supply voltage
Closed
CC
Pressure
Open
Signal
Open
Supply voltage
Open