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Ou Yongjia County Zhenjiang North Street
Zhenjiang, Jiangsu-325105, China+(86)-577-67319970
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Trunnion ball valve

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According to some special working conditions and customers' requirement, CHAODA has provided the trunnion ball valve with the B i-sealing design structure , i.e. 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 abnormal condition. Regarding the seat in front of the ball, the piston effect formed by the are a difference between D1 and D2 ,plus the pre-tightened force of a spring would cause the seat in front of the ball by the pressure difference of the medium before and after the valve to touch the ball closely to form the tightness, of which the sealing force will become bigger as the pressure difference gets higher.


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