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高真空阀门 美国A＆N公司 美国进口阀门

球阀提供直通式，以zui小的阀体足迹的畅通。 Because of their unique design, ball valves are less sensitive than other vacuum valves to particulate contamination and, therefore, are especially useful in 'dirty' vacuum applications.由于其*的设计，球阀比其他真空阀微粒污染不太敏感，因此，“脏”的真空应用中是特别有用的。 For example, ball valves are almost always used to isolate scrubbers and traps downstream of the rough pumping system.例如，球阀几乎总是被用来隔离粗糙的泵送系统的下游的洗涤器和陷阱。

Principles of Operation and Construction: Ball valves are made of a body, stem, ball, and end caps.的构造和操作原理：球阀是由主体，茎，球，端盖。 The ball is sealed within the body by end caps creating a vacuum tight central cavity.身体内的密封球是通过创建一个真空密闭的*腔的端盖。 The valve is opened and closed by turning the stem 90° back and forth （1/4 turn）.该阀被打开和关闭，通过旋转阀杆90°（1/4圈）来回。 The sealing seat for the ball wipes the ball clean as it is opened and closed.为球的密封座擦拭球清洁，因为它被打开和关闭。 This last features provides the "self-cleaning" action that makes this valve fairly robust to particle-rich effluent streams.这zui后一个功能，提供了“自洁”的动作，使得这种阀门相当强劲，丰富的粒子流。 Pneumatic actuators are available.气动执行器。