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汉语拼音：fá mén

管道中用来控制液 体或气体的流量，减低它们的压力或改变流动方向的装置。如安全阀、减压阀等。

• power, the pilot valve with a spring or to medium pressure to promote the closure of parts, moving down to the valve closed.

  断电时，先导阀利用弹簧力或介质压力推动封闭件，向下移动，使阀门封闭。

• This valve is usually used in the ventilation ducts to control the wind-conditioning or regulating emissions from coal cinder flows.

  此阀门一般使用于通风管道内控制风力调节，或者是煤渣流量排放调节。

• If the valves do not open and close at the right time or at all, air cannot get in and exhaust cannot get out, so the engine cannot run.

  如果阀门不在正确的时间打开或关闭，空气就不能进入，废气也不能排除，引擎就无法工作。

• But if one of the pumps fails, they may still have to make a call: not all the valves can be remotely controlled.

  但如果有一台水泵出现了故障，他们可能还是要拨打电话，因为有些阀门还没有实现远距遥控。

• Valve lever must be tripped at least once a year to insure that waterways are clear.

  阀门手柄每年至少要使用一次，以确保水路畅通。

• The valve would force the oil into a new riser, bringing it up to a ship.

  阀门将迫使油进入一个新的提升管，从而进入油轮。

• Actuation is often desired for process automation, precision timing, and remote operation not possible with manual valves alone.

  执行机构经常用于实现紧靠手动阀门无法实现的工艺过程的自动化，准确定时，以及远程操作。

• Leave the valve protection cap in place until the cylinder has been secured in place and is ready to be used.

  让阀门保护帽一直留在原位，直到钢瓶已经固定好，并准备使用。

• When designing valve systems, hydrodynamic torque must BE considered to help assure correct selection for the application.

  在设计阀门系统时，必须考虑水动力扭矩，这样有助于正确选择所需阀门产品。