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。
Fluid pressure on one side of the gate presses it against the opposite seat with great force and improves the seal.
而压力侧以相同的力削弱了密封，这样使阀盖腔室和阀杆填料几乎总是承受最大管道压力。
The same force tends to reduce the seal on the pressure side with the result that bonnet cavity and the valve stem packing are nearly always subjected to maximum pipeline pressure.
如果在制造商侧密封之一的包阵阵，注意以及爆破时的压力。
If the package bursts at one of the side seals made by the manufacturer, make note of that as well as the pressure at which it burst.
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