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Regularly check the tightness of the valve through the discharge nozzle

- May 29, 2018 -

Let's talk about the operation of the standard fully welded ball valve. Frequent operation can prevent impurities from accumulating on the surface of the valve seat or the ball, and it can also avoid local excessive wear of the valve seat inner inlay. Pay attention to the following points during the operation:

1, opening and closing time requirements. If the valve is opened too fast, it will cause the valve to be overloaded. The valve stem is damaged; too slow switching will cause the valve seat surface to be worn by the media for a long time. Therefore, the operating time should be kept within a suitable range. According to experience, the valve switching time (seconds) controls the range, the lower limit can be half of the nominal valve size (inches), and the upper limit can be estimated as 5 times the valve nominal size (inches).

2. When the valve is in operation, the valve ball should be fully open or fully closed. It must not be in the half-open or half-close position to avoid damage to the switch.

Then we talk about the daily maintenance of standard fully welded ball valves:

First, the valve seat cavity is the most easily polluted area of the pipeline valve. In order to ensure the free movement of the valve seat, it should be cleaned once a year. Wells are regularly checked for leaktightness through the discharge nozzle.

Then, the auxiliary gas line valve is often seldom adjusted. At least once a year, an appropriate amount of grease should be injected and injected to prevent the ball and valve seat from being glued together and the sub-grinding between the valve ball and the valve seat.


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