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- pressure vacuum vent valve 真空呼吸阀
- Analysis on Hydraulic Pressure Experiment of Pressure - and - Vacuum Vent Valve 呼吸阀阀体水压试验分析
- DVVV Distributor Vacuum Vent Valve 分电盘真空阀
- CPVVV Choke Pulldown Vacuum Vent Valve 阻风门真空强制通风阀
- The TK-DL can test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies. TK-DL可以检测压力真空断路阀，减压防回流阀或双止回阀总成。
- A pressure-and-vacuum vent valve is a kind of important adjunct,which pressure testing relates to its security and reliability. 呼吸阀是油罐的重要附件之一,其试验压力关系到呼吸阀的安全性和可靠性。
- All pressure instruments shall have a vent valve to provide the capability of depressurizing the sensing line after the block valve is closed. 所有压力仪表应配备一个排气阀，以便在截止阀关闭后能够使导压管泄压。
- A pilot-operated vent valve for pressure relief uses tank pressure, not weights or a spring, to keep the vent valve seat closed. 先导式通气阀泄压时利用储罐压力，而不是重力或弹簧外力，来保持通气阀阀座关闭。
- For modulating action, the main vent valve opens gradually with increasing pressure and achieves rated relieving capacity at relieving pressure. 对于调制式先导器，主阀门将随压力增加而逐渐打开，在泄放压力时达到额定排放量。
- Unlike in a direct-acting vent valve, the force holding the seat closed in a pilot vent valve increases with increasing pressure. 不同于直动式通气阀，先导式通气阀保持阀座关闭的作用力随压力增加而增加。
- Open vent needle valve and bleed air from hose. Then close vent valve. 开启排气针形阀，并从软管排放空气。然后关闭排气阀。
- Have the year produces8000 abilities of the set set of the each high pressure vacuum chopper. 具有年生产各型高压真空断路器8000台套的能力。
- Frequently open the vent valve to vent out the air in side the system. 经常开启管道排空阀门，以排出系统中的空气。
- Have the year produces 8000 abilities of the set set of the each high pressure vacuum chopper. 具有年生产各型高压真空断路器8000台套的能力。
- Manifold shall have safety pressure relieve valve, pressure regulators, and pressure gauges indicating inlet and outlet pressure, bleed valve (vent valve) and pigtail for cylinder connections. 气体管路需要有安全压力释放阀门、压力调节阀门、压力表来指示气体压力。
- A direct-acting vent valve is tightest when tank pressures are 75 percent or less of set pressure. 当罐压力为设定压力的75%25或更低时，直接作用式通气阀有最好的气密性。
- Open pump suction venting valve until gas free. 打开泵入口管线上的放空阀，至无气体。
- Manifold shall have safety pressure relieve valve, pressure regulators, and pressure gauges indicating inlet and outlet pressure , bleed valve (vent valve) and pigtail for cylinder connections. 气体管路需要有安全压力释放阀门、压力调节阀门、压力表来指示气体压力。
- The principle, action and control process of permanent magnet driven machinery were introduced, its characteristic was analyzed, and its application to medium pressure vacuum circuit breaker was expounded. 摘要介绍了永磁操动机构的原理、动作和控制过程，分析了永磁操动机构的特性，阐述了其在中压真空断路器上的应用。
- The solenoid plunger pulls the vent valve down, blocking off the passage to the charcoal canister. 电磁柱塞拉下通气阀，堵住通向活性碳罐的通路。
