What is the difference between bench set and operating range i control valve?

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What is the difference between bench set and operating range i control valve?..

Answer / chirag nihalani

if u do the adjustment in the string at the actuator, or
compress the spring, u will get the opposing force to move the
stem in the control valve that is called bech set .it depents
on the control valve. mostly foe small valve we use 3-15 psi
and for medium we use 6-30 psi .thanks

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