...性闸板flexible wedge、刚性闸板solid wedge 按中法兰分：螺栓连接阀盖(bolted bonnet: B.B) 压力密封阀盖(pressure seal bonnet) 螺纹焊接阀盖(screw-welded bonnet) 截止阀(globe): 阀瓣由阀杆带动，沿阀座密封面轴线做升降运动的阀门 工作行程小，启闭时间短...
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... pressure-tight box 气密盒 pressure-tight bonnet 压力密封的阀盖 ; 压力弥缝的阀盖 ; 压力密封阀盖 pressure-tight connection 耐压密闭连接 ...
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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.
紫铜垫性能特点：金属平垫由整体金属经机加工制成，用于压力容器、塔、槽、阀盖等部位的密封。
Copper cushion performance characteristics: metal flat mat by the overall metal machining, the made for pressure vessels, tower, trough, the cover of the place such as the seal.
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