表阀，又称根阀，是用于测试，泄放的一种阀门，广泛运用于电力，石油，化工行业。
本实用新型涉及一种防冻、防盗回压表阀。
The utility model relates to a back-pressure gauge valve which is freeze proof and theft proof.
上水时，空气阀、压力表阀及水位计通汽通水阀开足，其他阀门和检查门无孔门应一律关闭。
Before feeding water, air vent valves, pressure gauge valve, water level gauge, burner supply valve and steam supply valve should be opened fully. Other valves and checking manhole close.
压力表、阀、压力调节器均为面板安装。
Pressure gauge, valve, pressure regulator for panel mounting.
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