Fluid pressure on one side of the gate presses it against the opposite seat with great force and improves the seal.
闸板压力侧的流体压力使另一侧的阀座受较大的力,提高了密封性。
3
Ball and valve seat rings are metal materials, sealing pressure than the large, rely on the media itself can not seal the pressure has reached the requirements to be imposed by external forces.