Modes Of Operation For Valves - GF DIASTAR DN65 Bedienungsanleitung

Instruction manual

5 Modes of Operation for Valves

(Fig. 1, 2, 3)
B
A
Fig. 1
B
A
Fig. 2
Modes of Operation for Valves
Mode FC: Fail safe to close
In the de-energized state, the valve is closed
via spring force (see Fig. 1). When the control
medium is admitted to the actuator
(connection A), the valve opens; when the
control medium escapes, the valve is closed
via spring force.
Mode FO: Fail safe to open
In the de-energized state, the valve is opened
via spring force (see Fig. 2). When the control
medium is admitted to the actuator
(connection B), the valve closes; when the
control medium escapes, the valve is opened
via spring force.
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