Common Problems And Solutions Of Electric Valves .

Common Problems And Solutions Of Electric Valves

When the valve is opened, it is unable to reach the designated position

Cause analysis: The valve electric manual is unable to open the valve to the completely open position, and the opening torque is substantial. The fault judgment is that the stem thread is partially damaged. Uneven pitch; foreign matter lodged within valve.

Treatment: In the event that the stem or stem nut is damaged, it is imperative to promptly replace the crown. If a foreign body is lodged, the valve must be disassembled to remove the foreign body and resolve the issue at the source.

The local valve fails to operate, and the motor overheats extremely rapidly.

Cause analysis: In order to prevent the motor from being burned, the switch should be promptly deactivated following the occurrence of this phenomenon due to the out-of-phase power supply of the motor. Phase loss is the result of a poor contact in an air switch, contactor, thermal relay, or other device, as well as a terminal false connection or cable break.

Solution: Secure each wiring terminal. If a power failure occurs, use a multimeter to measure the resistance of each contact, identify the fault site based on the tissue's size, and replace it.

Through this phenomenon, we can evaluate the electric valve's body closure, as well as the operability of the electric head's mechanical component and the valve body. In comparison to manufacturers, the defect is caused by the fact that the action point of the electric head limit switch is inconsistent with the actual position of the valve body. Consequently, the mechanic must recalibrate the limit switch.

Treatment method: Manually adjust the electric valve to the totally closed position by opening the box body. If the electric valve is controlled by 02, the switch structure must be initiated to depress the torque switch.