放气阀安装于过电缆封隔器上部，通过螺纹与封隔器相连。通过液控管线由地面实现控制功能，在液控管线内加压使阀打开，积聚在封隔器下环空的气体就会排放到上环空内。释放管线内的压力，阀就会回到通常的关闭状态。当液压管线失效 时，可以通过在套管环空中加压来开启备用放气阀。

主要特性

◎ 可以通过套管加压来开启备用放气阀；

◎ 开关压力稳定；

◎ 金属对金属密封可靠，寿命长；

◎ 外径小，过流面积大；

◎ 蕞大下入深度可达1000米。

Gas vent Valve is installed above the ESP packer, and it is attached to the packer with thread. It is   controlled by hydraulic control line through surface manipulation . When pressure load isapplied in hydraulic control line, the valve opens, it allows gas which has accumulated vent tothe annulus below the packer. When control line pressure is released, the valve will return to the normally closing state. When the hydraulic line fail the gas vent valve can be switched through applying pressure and releasing pressure.

FEATURES

◎ AGas vent valve can be switched by applying pressure and releasing pressure;

◎ Open pressure can be adjusted;

◎ Metal to metal seal, reliable, long service life;

◎ Little OD, large flow area.

Note: Other specification products are available