Purpose: To test valve No. 1 for tightness against reverse flow.
目的：检测1号止回阀对于回流的密封性。
Close shutoff valve No. 2 then shut off valve No. 1 on test assembly.
关闭2号关闭阀，然后关闭测试总成上的1号阀门。
Purpose: To test check valve No. 2 for tightness against reverse flow.
目的：检测止回阀2号对于回流的密封性。
There must be no valve between the relief valve and heater.
在安全阀和热水器之间不能够安装任何阀门。
The regulating handle consists of manoeuvring valve pos. no. 01 and handle mechanism.
调节手柄由操纵阀01和手柄机构组成。
Valve flap and valve seat for the soft seal, seal performance, no leakage.
阀瓣与阀座为软密封，密封性能好，无泄露。
没有天然气截止阀本。
Results The group had no case dead, 2 cases need re-mitral valve replacement.
结果全组无手术死亡病例，2例行二尖瓣置换术。
Stroke the valve open and closed several times, with no line pressure.
在没有任何管道压力状态下开启和关闭阀门几次。
Stroke the valve open and closed several times, with no line pressure.
在没有任何管道压力状态下开启和关闭阀门几次。
应用推荐