normal open valve 中文意思是什麼
normal open valve
解釋
常開閥-
Once the pressure of the main network returns to normal, the valve flap of drainage outlet closes under pressure, first, second level check valves open, the main network return to supply water to branch pipeline
一旦主管網壓力恢復正常，排污口閥瓣受壓關閉，一二級止回閥打開，主管路恢復向支管供水。 -
At this time, slowly open the test ball valve completely, then a lot of water is discharged at the drainage outlet, close the test ball valve, the drainage device closes too, this shows that action of anti - pollution isolating valve is normal
此時緩慢將試驗球閥完全打開，這時排污口有大量水排出，關閉試驗球閥，排污器也隨之關閉，這說明防污隔斷閥動作正常。 -
The valve remains open while the operating pressure is within the normal operating limits
當操作壓力維持在正常工作界限內時，閥保持開的狀態。
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