電動(dòng)球閥前后雙重密封結(jié)構(gòu)設(shè)計(jì) THE bi-sealing design structure,i seat in front of the ball and seat sealing behind the ball
對(duì)于某些特定的工況要求以及用戶要求現場，固定球閥可以采用球前球后雙重密封結(jié)構(gòu)設(shè)計(jì)主要抓手，即是其中一個(gè)密封副因意外情況密封失效技術交流，閥門仍然能夠正常工作，從而提高了閥門的密封可靠性不斷發展，
對(duì)于球前閥座穩定發展，有D1部署安排，D2的面積差形成的活塞效應(yīng)的特性，在閥前后的介質(zhì)壓差作用下，加上彈簧的預(yù)緊力使球閥前閥座與球體緊密接觸而密封進一步提升，并且密封力隨著介質(zhì)壓差的增大而增加空間廣闊。
對(duì)于球后閥座，有D2改革創新，D3的面積差形成的活塞效應(yīng)知識和技能，在閥座前后的介質(zhì)壓差作用下，加上彈簧的預(yù)緊力使球后閥座與球體緊密接觸而密封新模式，并且密封力隨著介質(zhì)壓差的增大而曾加實現。

According to some special working conditions and customers, requirement ,MINGTAI has provided the trunnion ball valve with the BI sealing design structure ,seat sealing in front of the ball and seat sealing behind the ball ,thus the reliable sealing of the valve is ensured because the valve can perform normally even if one of the effective sealing designs becomes lost due to the abnor malcondition