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Views: 1 Author: Site Editor Publish Time: 2020-07-25 Origin: Site
Double isolation and relief design of double block and bleed valve
（1）J-VALVES double block and bleed valve provides an optional two-phase sealing valve seat structure design. The two valve seats of the Trunnion ball valve can independently cut off the medium at the inlet and outlet, and at the same time cut off the pressure from the middle cavity, realizing the dual isolation function. When the Trunnion mounted ball valve is closed, the medium trapped in the valve inlet, outlet and the middle cavity of the valve are isolated from each other ; When the valve inlet and outlet seat, the outlet end seat can also provide sealing, so that the valve has a double sealing function.
（2）Manual and automatic pressure relief of valve cavity
The medium trapped in the middle cavity of the valve body can be manually discharged through the pressure relief valve on the valve body; in some working conditions, the medium trapped in the middle cavity of the mounting trunnion ball valve vaporizes due to the increase in temperature, resulting in an abnormal increase in the pressure in the middle cavity. When the internal medium pressure exceeds the set value, it can be automatically discharged through the safety valve set on the valve body to protect the safety of the double block and bleed valve and the pipeline.