...V) API 520 - 火灾工况计算与选型(Fire Sizing) API 526 - 阀门尺寸(Valve Dimension) API 527- 阀座密封(Seat Tightness) 如何提供高质量的询价? • 介质状态(气/液/气液双相).
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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。
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