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弹性球气动球阀
Elastic ball pneumatic ball valve
气动球阀的球体是弹性的。球体和阀座密封圈都采用金属材料制造，密封比压很大，依靠介质本身的压力已达不到密封的要求，必须施加外力。这种阀门适用于高温高压介质。
The ball of pneumatic ball valve is elastic. Both the ball and the seat seal ring are made of metal materials. The specific pressure of the seal is very large. The pressure of the medium itself can not meet the requirements of the seal, so an external force must be applied. This valve is suitable for high temperature and high pressure medium.
弹性球体是在球体内壁的下端开一条弹性槽，而获得弹性。当关闭通道时，用阀杆的楔形头使球体涨开与阀座压紧达到密封。在转动球体之前先松开楔形头，球体随之恢复原原形，使球体与阀座之间出现很小的间隙，可以减少密封面的摩擦和操作扭矩。
The elastic sphere is an elastic groove opened at the lower end of the inner wall of the sphere to obtain elasticity. When the channel is closed, the wedge-shaped head of the valve rod is used to make the ball expand and compress with the valve seat to achieve sealing. Before rotating the ball, first loosen the wedge-shaped head, and then the ball will return to its original shape, so that there is a small gap between the ball and the valve seat, which can reduce the friction and operating torque of the sealing surface.