Instruction manual
5.1
Functions
Response in the event of a pressure drop
With the FC and FO functions, the installed spring sets the actuator back to the fail-safe
position if there is a pressure drop.
In versions with the DA function, the actuator remains in its current position if there is a
pressure drop.
FC function: spring closed
Control air through a 3/2-way valve on
connection A turns the actuator 90° to the
left
FO function: spring opened
Control air through a 3/2-way valve on
connection A turns the actuator 90° to the
right.
DA function: double-acting
Control air through a 5/2-way valve on
connection A turns the actuator 90° to the
right.
Control air through a 5/2-way valve on
connection B turns the actuator 90° to the
left.
Design and function
37