Common Fault Handling Methods For Valve Electric Devices

Output shaft displacement changes, position feedback current is less than 10mA

Solution: Shake the handwheel to move the output rod of the actuator to the large stroke, then open the cover of the position transmitter, adjust the potentiometer W3, and adjust the milliamp meter to 10mA accurately. The opening is in one-to-one correspondence with the feedback current.

Talking about the relationship between valve electric device and valve

Actuator does not operate when the electric operator is manual

When the operator switches the manual position of the switch, the operation switch is toggled in the "on" or "closed" directions, and the actuator does not operate. Under normal circumstances, put the operator switch in the manual position to turn on the power, the "manual" indicator light is on. When the operation switch is toggled in the "on" direction, the output shaft should increase in the upward direction, and the position of the valve position opening table changes from o% to 10%. When the operation switch is toggled in the "closed" direction, the output shaft should be lowered in the downward direction, and the position of the valve position opening table changes.

When the operator is automatic, the actuator does not move.

The operator works normally when it is manual, but when it is automatic, the servo input is not zero, and the actuator output shaft keeps a certain valve position and does not turn to the predetermined position. The solution is to reverse the servo amplifier phase zero line.