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Double Block And Bleed Valve Design the DBB structure

Views:1     Author:Site Editor     Publish Time: 2020-07-25      Origin:Site

Double Block And Bleed Valve Design the DBB structure

(1)Double blocking and release function

J-VALVES double block and bleed valve generally adopts ball front valve seat sealing structure.The two valve seats of the Trunnion mounted ball valve can independently cut off the medium at the inlet and outlet ends to realize the double-break function. When the ball valve is closed, even if the inlet and outlet of the valve are pressurized at the same time, the middle cavity of the valve and the passages at both ends can be blocked each other, and the remaining medium in the middle cavity can be discharged through the relief valve.


(2)Automatic relief of valve cavity

When the liquid medium in the middle cavity of the Trunnion ball valve vaporizes due to the increase in temperature, causing the pressure in the middle cavity to increase abnormally, the medium in the middle cavity can rely on its own force to push the valve seat and automatically release the pressure, thereby ensuring the valve Safety

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