1, the sealing performance of the valve should be tested to ensure its performance.
2, check whether the valve seal surface is worn or not, and repair or replace according to the situation.
3. The storage environment of the valve should be paid attention to. It should be stored in a dry and ventilated room, and the two ends of the passage should be blocked.
4. The installed and used valves should be regularly overhauled to ensure their normal work.
5, the valve in the operation should be perfect, the bolts on the flange and the support are complete, the thread is nondestructive, and there is no loose phenomenon.
6, check the trapezoidal thread wear of the stem and the stem nut, whether the filler is out of date and so on, and make the necessary replacement.
7, if the use of the valve environment is more harsh, easy to suffer from rain, dust, sand and other dirt contamination, the valve should be installed protection cover.