中国液压协会 关键词：液压变量马达；压力切断阀；汽车起重机 [gap=1086]Key Words: variable hydraulic motor； pressure shut-off valve； automobile crane
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Thus the valve control valve flow capacity than the average large and no leakage in the range of allowable pressure shut-off valve can be used.
因而阀流通能力比一般调节阀大且无泄漏，在许用压差范围内可作切断阀用。
Intercept the fluid medium upstream of the valve to be inspected with a shut-off valve and ensure that the subject valve is not under pressure (vent downstream, if necessary).
截取阀门上游的流体介质，用一个关闭阀门来进行检测，确保相关的阀门不处在压力下(如果必要的话，排除下游的流体介质)。
Oxygen flows through the pressure reducing regulator and shut off valve to the masks.
氧气通过减压调节器和关断活门流向氧气面罩。
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