2011年12月12日星期一 1 换向阀的结构特点及工作原理 1．球座阀(Ball seat valve) 这种换向阀结构紧凑、简单， 可安装各种类型的驱动头。对 于直接驱动方式来说，驱动推 杆动作的驱动力限制了其应用。
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ball and seat valve 球形止回阀
ball-and-dish seat type valve 球及球座型阀
check-valve ball seat 止回阀球座
ball resolver valve seat 球形分解器阀座
ball valve seat 球阀座
valve ball seat 止回阀球座
check valve ball seat 止回阀球座
Then install valve upside down for fluid to lift ball into seat.
然后倒置安装阀门，使得流体将球提升到阀座上。
Gravity ball check valves are converted to vent valves by replacing the standard ball with a floater ball and inverting the valve at installation-with seat up.
重力球形止回阀可以变为通风阀，只需用漂浮球体更换标准球体，然后在安装时将阀门倒置，使其阀座向上即可。
Ball and valve seat rings are metal materials, sealing pressure than the large, rely on the media itself can not seal the pressure has reached the requirements to be imposed by external forces.
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。
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