For foot valve, replace inlet end connection with an F. V. screen housing assembly.
对于底阀，用一个F.V。滤网外壳组件更换进口连接管接头。
Open vent needle valve fully until dripping from vent connection stops.
完全开启排气针形阀直到从排气连接处的滴漏停止为止。
The valve seat of the integrative type, the valve body, valve seat connection question exist.
一体式的阀座，不存在阀体、阀座连接问题。
The valve seat of the integrative type, the valve body, valve seat connection question exist.
一体式的阀座，不存在阀体、阀座连接问题。
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