Comparing prior art, the invention increases packing force 2.5 times. Large bonding strength is in favor of safety of transportation.
连接时本发明特殊结构，箱与箱的压紧力比原螺栓拧紧力增大2.5倍，因此连接强度很大，有利于运输的安全。
V type packing structure has been employed to effectively transform the pushing force of the gland flange and the medium pressure into the sealing force against the stem.
阀杆采用V型填料密封结构，V型填料能将填料压盖的压紧力及介质力有效地转化成阀杆的密封力。
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.
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。
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