How to Deal with Leakage Due to Valve Closure Parts Dislodged
The valve closure parts may dislodged and cause leakage. When the valve closure parts dislodged, the valve cannot be completely closed, resulting in the medium not being effectively isolated, causing leakage. This situation may cause serious damage to the equipment and the environment, so measures should be taken immediately to repair or replace the valve closing parts to prevent leakage.
Overview
►Reasons of leakage:
1. poor operation, so that the closure piece is stuck or over the upper dead centre, the connection is damaged and broken;
2. The connection of the closing parts is not firm, loose and fall off;
3. Selection of connecting parts material is not right, can not withstand the corrosion of the medium and mechanical wear and tear.
►Maintenance method:
1. correct operation, close the valve can not be too much force, open the valve can not exceed the upper dead point, after the valve is fully open, the handwheel should be reversed a little;
2. The connection between the closing part and the valve stem should be firm, and there should be a stopper at the threaded connection;
3. The fasteners used for connecting the shut-off parts with the valve stem should be able to withstand the corrosion of the medium and have a certain degree of mechanical strength and wear-resistant properties.
