relief vent meaning in Chinese

安全通风管
辅助透气管

When a series 994 backflow preventer is installed for dead - end service applications , discharge from the relief vent may occur due to water supply pressure fluctuation during static no - flow conditions
当系列994防回流阀安装在终端应用场合时，由于在静止无流动情况下水供应压力波动可能会从安全阀排放口产生排放。
Relief vent will discharge water when , during no - flow periods , ( 1 ) the first check valve is fouled or ( 2 ) the inlet pressure to the device drops sufficiently due to upstream pressure fluctuations
如果在无流动期间，安全阀排气口有水排出，则原因可能是， ( 1 )第一止回阀受到污染，或( 2 )由于上游压力波动造成装置的进口压力下降太大。