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- 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。
- vent valve seat 通风阀座
- 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。
- Clean or replace the relief valve seat. 清洗或更换安全阀阀座。
- Damage or fouled relief valve seat. 安全阀阀座损坏或受到污染。
- Damaged or fouled relief valve seat. 安全阀阀座受到损坏或污染。
- Place the relief valve seat back into the chamber bore. 将安全阀阀座放回到镗孔内。
- 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。
- Slide the diaphragm assembly into the relief valve seat. 将隔膜总成滑进到安全阀阀座内。
- 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。
- Remove the pressed in relief valve seat and seat O-ring. 拆卸压进去的安全阀阀座和阀座O形环。
- The maximum differential pressure across the valve seat. 通过阀门阀座的最大压差。
- 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。
- Quick replaceable valve seat, convenient maintenance. 阀座可以快换，维修方便。
- Stellite takes a high polish and is used in steel valve seat rings. 钨铬钴合金具有很高的抛光度，用作钢阀门的阀座环。
- 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。
- 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。
- The exhaust valve seats skimmed up. 排气阀座整新。
