濟南試驗機廠專業生產混凝土專用壓力試驗機，其氣閥的嚴密性在換新氣閥或者經過修理、裝配的老氣閥安裝在混凝土壓力試驗機上之前，必須做嚴密性試驗。

Ji'nan testing machine factory is specialized in the production of special pressure concrete testing machine, close the valve on the new valve orrepaired, old valve assembly is installed on concrete pressure testingmachine before, must do the tightness test.

先將閥端面放置于水平狀態，用潔凈水從閥的入口端灌入，也可由出口端灌入，注滿各孔眼，靜置1分鐘左右。孔眼水不下降為合格。如有下降，則說明閥漏，需要拆卸，全面檢查，修好、安裝完后，繼續灌水試驗，直到合格為止，否則將影響混凝土專用試驗機的檢測精度。這是比較簡單方便的方法。

The valve end is placed on the horizontal state, from the entrance into thevalve end with clean water, but also by the outlet end filling, filling the hole,standing for 1 minutes. Don't fall for qualified water hole. If there isdecreased, the valve leakage, disassembly, repair, overhaul, after installation, continue to water test, until the qualified so far, otherwise it will affect the accuracy of the special test concrete machine. This method is simple and convenient.