1. Opening and closing time requirements. Switching the valve too fast will result in excessive load on the valve stem. This will damage the valve stem; then too slow switching will cause the surface of the valve seat to be washed by the medium for a long time and be worn. Therefore, the operating time should be kept at an appropriate level. Within the range. According to experience, the lower limit of the control range of the valve opening and closing time (seconds) is half of the nominal valve size (inch), and the upper limit can be estimated as 5 times the valve nominal size (inch).

2. When the valve is in operation, the valve ball should be in the fully open or fully closed position, and must not be in the semi-open or semi-closed position to avoid damage to the valve seat.

3. In the pipeline valve, the easily contaminated area is the valve seat cavity. Therefore, in order to ensure the freedom of movement of the valve seat, it should be cleaned once a year, and the sealing performance of the valve should be checked regularly through the drain nozzle. Auxiliary gas main line The valve is usually seldom adjusted, so it should be opened and closed at least once a year and an appropriate amount of grease should be injected to prevent the gluing of the ball and the valve seat and the wear between the ball and the valve seat.