If the valve is not repaired and maintained in time, it will cause leakage of the valve or leakage of the switch; the valve is not regularly overhauled and pressure tested, even if it is used for many years without cleaning, pressure testing and technical appraisal, resulting in debris deposited in the valve, close the valve, Severe oil leakage, simmering oil; valves are not closed after maintenance, or the nozzles are not blocked after the valve is removed; the valve dust gaskets are made of non-resistant oil pressure resistant materials. Therefore, it is necessary to strengthen the inspection and maintenance of the valve and strive to prevent it from happening. The main content of the monthly inspection of the valve:
1. Whether the stem seal and flange gasket static seal leak；
2, open and closed state is normal；
