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- It is equipped with asphalt return tube, anti-puffing pressure vent valve, anti-aging overhead nitrogen valve, thermometer, volumeter and output asphalt rapid discharge valve and coupling. 配备沥青溢流管、防冒液呼吸阀、防老化顶置充氮阀、温度计、容量计和输出沥青的快速卸料阀及接耦。
- pressure vent valves 呼吸阀
- If two or more containers are manifolded, the vent valves should also be connected together to ensure pressure equilibration between all the containers. 如果把两个或更多容器并联在一起，排气阀也应该连接在一起，以确保所有容器之间的压力平衡。
- Manual high pressure vent valve 手动高压放空阀
- pressure vent valve 呼吸阀,压力放空阀
- Where required, the piping installation shall include valves for isolation, bypass capable of full flow manual control, and drain and vent valves. 管道的安装应按照要求包括隔离阀和旁通阀，用于控制全流量手动控制调节阀、排液阀和排气阀。
- 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。
- Control functions or actions requiring infrequent attention (such as positioning drain and vent valves, starting motors and pumps, and placing systems into automatic operation) are frequently left to manual operation. 那些并不需要经常注意的控制功能或调控行动常留给手动完成。
- 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。
- 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。
- Gravity ball check valves are converted to vent valves by replacing the standard ball with a floater ball and inverting the valve at installation - with seat up. 重力球形止回阀可以变为通风阀,只需用漂浮球体更换标准球体,然后在安装时将阀门倒置,使其阀座向上即可。
- Gravity ball check valves are converted to vent valves by replacing the standard ball with a floater ball and inverting the valve at installation?with seat up. 重力球形止回阀可以变为通风阀，只需用漂浮球体更换标准球体，然后在安装时将阀门倒置，使其阀座向上即可。
- 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。
- Open pump suction venting valve until gas free. 打开泵入口管线上的放空阀，至无气体。
- 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。
- 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。
