The lower valve core performs a switching function.
下阀芯起开关作用。
The threads on the lower valve stem are in the wetted gas stream.
下阀杆上的螺纹是处在潮湿气流中的。
The PORV 'backup valve is opened to lower the pressure.
减压阀的备用阀门被打开，减少压力。
Lower the valve into position between the pipeline flanges.
将阀门放低，使其进入管道法兰之间的位置。
Open the upper sea inlet valve and close the lower one.
打开高位海底阀，关闭低位海底阀。
Upper and lower bushings are standard for smooth valve operation.
上部和下部衬套符合流畅平稳轻松操作阀门的标准要求。
In an open valve, fluid flows in a direction from higher pressure to lower pressure.
在打开的排气阀，流体流动的方向，从更高的压力，降低压力。
In an open valve, fluid flows in a direction from higher pressure to lower pressure.
在打开的排气阀，流体流动的方向，从更高的压力，降低压力。
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