Internal leakage of electric control valve during operation

1. The closing type of the valve is to push downwards. The thrust of the executive structure is not large enough. It is easy to reach the complete position without pressure debugging. Therefore, when there is thrust, the liquid that the thrust cannot overcome, the closing is not in place. Solution: Replace the actuator with larger thrust, or replace the balance valve core to reduce the unbalanced force of the medium.
2. Internal leakage caused by electric control valve debugging. Solution: reset the limit.
3. The internal leakage of the electric control valve caused by the valve cavitation corrosion caused by the selection error. Solution: Process improvement, use multi-stage pressure reduction or sleeve control valve.
4. Poor manufacturing quality of the electric control valve causes internal leakage. Solution: Rework the sealing surface.
5. Internal leakage caused by medium scouring and aging of electric control valve. Solution: readjust the actuator, maintain and calibrate regularly.
6. The zero adjustment of the actuator is not accurate and the valve is not completely closed. Adjustment method: 1) Manually close the dead valve (must confirm that it is completely closed); 2) Manually close the valve again forcefully, with little force; 3) Turn (valve opening direction) half-turn; 4) Then adjust the limit.
7. The control part of the electric control valve affects the internal leakage of the valve. Solution: reset the limit.