The Pressure Testing Methods for Butterfly Valve
The butterfly plate is driven by the valve stem. If sanitary butterfly valve turns 90 degrees, then one opening and closing is completed. Change the deflection angle of the butterfly plate, and we can control the medium flow.
The use of butterfly valve:
Butterfly valve is suitable for pipelines transmitting various corrosive and non-corrosive fluid medium in furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation environmental protection, construction and drainage and other engineering systems. It is used to regulate and cut off the flow of the medium.
Pressure testing method:
The strength test of pneumatic butterfly valve is the same as that of shut-off valve. For the sealing performance test of butterfly valve, the test medium should be introduced from the medium inflow end. The butterfly plate should be opened. The other end is closed, and inject the pressure to the specified value.
After ensuring there is no leakage at the stuffing and other sealed part, close the butterfly plate. Open the other end, if there is no leakage at the sealing of butterfly plate, it is considered qualified. Butterfly valve that is used for flow regulation can skip the sealing performance test.