Maintenance knowledge of pneumatic three eccentric wafer butterfly valve Do three phases need zero line? 1 Overview With the continuous development of industry, the demand for pneumatic butterfly valves, especially those under high temperature and high pressure conditions, is growing. Pneumatic butterfly valves are required to have higher wear resistance, erosion resistance, high temperature resistance and corrosion resistance. While the traditional full bore pneumatic butterfly valve has undergone surface hardening treatment by surfacing, spraying and other technologies, its service life, cost and performance still cannot meet the requirements, such as industrial silicon, coal chemical industry, blast furnace gas, gas and other harsh conditions.
、 When we find the leakage problem of the sealing ring of the pneumatic butterfly valve, we may at first think about whether the butterfly valve is in place. In fact, this piece of pneumatic butterfly valve is related to the maintenance work at ordinary times. If it is well done, there will be no problem that the butterfly valve switch is not in place. How to solve the problem?
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