The Main Contents Of Inspection in Daily Maintenance Of Pneumatic Control Valve

(1) Learn about the operation of the regulating valve from the process operator on duty;

(2) Check whether the air supply pressure of the regulating valve, the positioner (electrical converter) and the purification of the air source are normal;

(3) Check whether the air pipe joint is leaking or loose;

(4) Check whether the operation of the actuator is flexible;

(5) Check whether the output of the regulator, the output of the positioner (converter) and the action position of the regulating valve correspond;

(6) When the regulating valve is in the manual position, observe whether the regulating valve stem still moves up and down. If there is, check the regulating valve actuator, and deal with the problem in time;

(7) Check whether the dynamic and static sealing points of the actuator and the regulating valve are leaking;

(8) Place the auscultation probe at the valve stem to detect whether the valve core and valve seat have abnormal noise and large vibration during dynamic operation;

(9) Find problems and deal with them in a timely manner, and make a patrol inspection record.