Seat tightness achieved with torque as opposed to line pressure.
利用扭矩而不是管路压力来实现阀座的密封。
The initial seat tightness of valves which can be proven by hydro-testing has little effect on extended long-term tightness.
阀门的初始阀座气密性可以通过水利测试进行检验，这种测试对以后长期的气密性影响很小。
Precision ground blade on both sides for tighter packing chamber sealing. Sealing face of the gate is lapped to provide the best possible seat tightness.
两侧都经过精密光亮磨光的刀片确保填料腔的气密性密封。闸板的密封面经过研磨，以提供最好的阀座密封性。
The metal-to-metal seat ensures tightness if the secondary elastomer seat is damaged during the fire.
如果第二重合成橡胶阀座在火灾期间被损坏，则金属-金属阀座还可以保证气密性。
The metal-to-metal seat ensures tightness if the secondary elastomer seat is damaged during the fire.
如果第二重合成橡胶阀座在火灾期间被损坏，则金属-金属阀座还可以保证气密性。
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