Reasons for Valve Not Closing

In the event of a valve not closing, first determine where the problem is occurring, and then deal with it accordingly. The general reasons why the valve cannot be closed are as follows

1. There are impurities attached to the sealing surface, and the debris is piled at the bottom of the valve or pressed between the valve and the valve.

2. The valve stem thread is rusted and the valve cannot be turned.

3. The sealing surface of the valve is damaged and the medium leaks.

4. The valve and the valve are poorly connected to prevent the valve from contacting the valve obliquely.

How to deal with valve not closed:

1. Impurities are attached to the sealing surface of the valve.

Sometimes the valve cannot be closed suddenly, and impurities may be caught between the sealing surfaces of the valve, so it cannot be closed forcibly. If the valve is opened slightly larger, and then try to close again, it can be ruled out after repeated attempts. Otherwise check, keep the media quality clean.

2. The valve stem screw is rusted

Often, with open valves, the valve screw is rusted when it is accidentally closed, and it can't be closed. In this case, the valve can be repeatedly opened and closed many times, while hitting the bottom of the valve with a small hammer, the valve can be firmly closed without replacing and repairing the valve.

3. Damaged valve sealing surface

The switch still cannot be closed several times, which means that the sealing surface is damaged and needs to be repaired. Or corrosion, particle scratches on the medium, etc. will damage the sealing surface and need to be repaired.

4. Poor connection between the valve stem and the valve

Always lubricate the valve and stem nut, ensure flexible opening and closing of the valve, and develop a formal maintenance program.