pressure vent valve

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。

Slowly open vent needle valve just as air inlet opens. Record differential pressure.

当空气进口开启时,慢慢开启排气针形阀. 记录压差.

A direct-acting vent valve is tightest when tank pressures are percent or less of set pressure.

当罐压力为设定压力的75%或更低时,直接作用式通气阀有最好的气密性.

After investigation and analysis, an improved measure was adopted in this system by adding vent pipe to oil tank at back position of pressure meter valve in each AC and DC oil pump exit, that has been proved correct in practice.

经研究分析，对系统进行了改造，将交、直流油泵压力表管阀门后各加装一条回主油箱的放空气管，实践表明是正确的。