閥座密封負(fù)載和緊密性與反壓力相關(guān).Seating load and tightness is dependent on back pressure.不要安裝在可能發(fā)生反壓力的地方.Do not install where backpressure can occur.止回閥模塊結(jié)構(gòu)應(yīng)該包括內(nèi) 置 止動(dòng)限止器,防止由于反壓力造成閥瓣磨損.Check module construction shall include built - in ...