What Constitutes a Cycle for Preventative Maintenance Purposes?

G

Thread Starter

Gerald Beaudoin

Control valves:

A manufacturer of a valve and actuator specs the life at 2 million cycles.

They then define a cycle is 0-90 % movement.

What about the case of where the valve sits all day oscillating around 50 to 60 % ?

What then constitutes a cycle for preventative maintenance purposes?

Thanks
 
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