Third, due to the eccentric structure, the sealing between the sealing surface of the valve plate and the valve seat mainly relies on the torque of the transmission device to press the valve plate against the valve seat. If it is in the positive flow state, the medium pressure is very high, and the seal extrusion will also be very tight. When the reverse flow occurs, the medium pressure increases, and the unit positive pressure between the valve plate and the valve seat will be smaller than the medium pressure, thus sealing leakage will occur. 　　　　

How to use explosion-proof electric ball valve? After the explosion-proof electric ball valve is installed, the pneumatic pipe ball valve is started to open several times to ensure flexibility and uniformity, and the pneumatic pipe ball valve works normally. According to the pipeline pressure planning requirements, the sealing performance of the blue joint surface after the pressure is tested by the pneumatic pipe ball valve and pipeline method.