Product Features:
       Pour enveloping type explosion-proof:radically stop spark production, there is no
        security risks , and it will not be a detonation source.
        Opening valve Mode:manual reset .
        Closing valve mode:Direct current drive;
        Closing valve time : within 1s
        Closing valve Control: Low-power transient driving, support fire fighting backup  
        power working mode.
        Signal output: can output the valve switching state feedback characteristic signal
        on the two control lines of closing valve .
        Keep manner: self-keep on/off state
        Strong shake closing valve: valve will automatically cut off upon sharp shake .
        Reliable sealing: use multilevel seal measures on the structure ,to ensure gastightness
        and safety; adopt NBR/FKM rubber in the material.
         Reliable action: on/off 2 million times without failure.