Actuators - C27 - C53

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MODELS C27 - C53

SPRING/DIAPHRAGM LINEAR PNEUMATIC ACTUATORS

Actuator models C27 and C53 are multi-spring, single acting, spring opposed, linear actuators used with Cashco sliding stem (linear), globe-style control valves. The “R” denotes“ reverse”acting arrangement; the “D” denotes “direct” acting arrangement and are reversible in the field.

“D” = Direct action; on increasing air loading pressure,the actuator stem extends. Fail-safe position is with the stem retracted.

“R” = Reverse action; on increasing air loading pressure, the actuator stem retracts. Fail-safe position is with the stem extended.

When coupled with a globe-style control valve with pushdown to close action, a “D”- direct acting actuator will provide valve “fail open” action;“D” = ATC-FO. When coupled with an “R” - reverse acting actuator, will provide valve “fail closed” action; “R” = ATO-FC.