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2022-12-20 16:54

Reasons for the valve not being closed tightly include:

1. There are impurities stuck on the sealing surface, and the impurities are deposited at the bottom of the valve or between the valve clack and the valve seat.

2. The valve stem thread is rusted and the valve cannot rotate.

3. The sealing surface of the valve is damaged, resulting in medium leakage.

4. The connection between the valve rod and the valve disc is not good, so that the valve disc and the valve seat can not be closely contacted due to deflection.

Solution for valve not being closed tightly:

1. The sealing surface of the valve is blocked by impurities. Sometimes the valve cannot be closed tightly suddenly. It may be that there are impurities between the sealing surfaces of the valve, which cannot be closed forcibly. It should be checked and the quality of the medium should be kept clean.

2. The valve stem thread is rusted. For the valve which has been open all the time, if it is closed occasionally, the valve stem thread has been rusted, and the valve can not be closed tightly. In this case, switch it on and off several times.

3. If the sealing surface of the valve is damaged and can not be closed tightly after several times of opening and closing, it may be that the sealing surface is damaged and should be reported for repair; Or the sealing surface is damaged by corrosion, particle scratch in the medium, etc., which should also be reported for repair.

4. The connection between the valve stem and the valve disc is not good, so it is necessary to add lubricating oil to the valve stem and the valve stem nut frequently to ensure that the valve can be opened and closed flexibly.