自动循环阀 Automatic Recirculation Valve
循环阀 [油气] circulating valve ; cycling valve ; recycle valve
反循环阀 [油气] reverse circulation valve
圆环阀 double beat valve ; annular valve ; annular ring valve
再循环阀 recirculation valve ; recycle valve
逆循环阀 reverse circulating valve
内压式反循环阀 internal pressure operated reversing valve
单向循环阀 one-way circulation valve
加热循环阀 heating circulating valve
拆卸压进去的安全阀阀座和阀座o形环。
在安装系列4700夹管阀时，建议在阀门法兰后面采用镀锌钢支撑环加固。
When installing the Series 4700, it is recommended that galvanized steel back up rings be used behind the valve flanges.
保持阀芯头与阀座环对中，对于严密关闭是重要的。
To maintain the spool in the head and valve seat rings for tight closure is important.
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