Pneumatic control valve with input signal but no action causes and troubleshooting methods

pneumatic regulating pneumatic valve failure causes a lot of, so to adopt corresponding measures to eliminate, to effectively extend the service life of pneumatic pneumatic valve.
pneumatic pneumatic valve has input signal but no action the causes of fault fault

, actuators, pneumatic valve rod bend or break the
, pneumatic valve core loss
and bushing or pneumatic, pneumatic valve core seat card
the death, the locator amplifier constant orifice clogging in the
pneumatic regulating pneumatic valve
troubleshooting methods, check the executing agency, if there is any breakage must be replaced immediately
and change the pneumatic valve rod
and reinstall the pneumatic valve core
, check the pneumatic valve shaft alignment and reinstall
, using fine copper removal constant orifice sundry