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原文
Ball Valves Category: Valve according to the structure can be divided into: floating ball valve, fixed ball valve, ball valve and flexible seal valve; per channel can be divided into straight ball valve, angle valve three-way ball valve and so on, three formula can be divided into T-and L-shaped two. Work can be classified according to the connecting threaded connection ball valve, flanged ball valves and welded ball valve three. 1, floating ball valve Valve ball is floating in the medium under pressure, can produce some displacement of the sphere and pressed in the export side of the sealing surface to ensure the outlet seal. Floating ball valve of simple structure, good sealing, but the media sphere to bear the load of work to pass all export ring, so to consider the ring material can withstand the sphere of media work load, the higher pressure in the shock by The sphere may be shifted. This structure, typically used in low-pressure valve. 2, the fixed valve The ball valve is fixed, pressure produces no movement. Are fixed with a floating ball valve seat, by the media pressure, the valve seat have moved to seal pressed on the sphere, in order to ensure sealing. Usually with the ball in the upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter of the valve. In order to reduce the valve operating torque and increase the reliability of the seal, valve seal has emerged in recent years, both in the sealing surface injection pressure special lubricating oil, to form a layer of film, which enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve. 3, elastic ball valve (ie, the track ball) The ball valve is flexible. Ball and 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. This valve suitable for high temperature and pressure medium. Elastic sphere is the sphere wall at the bottom of a flexible open slot, and access flexibility. When the closed channel, wedge-shaped head with a stem and the valve seat to open up the ball pressed to seal. Release the ball before turning the wedge-shaped head, along with sphere to restore the original prototype, the ball with a small gap between the valve seat, sealing surface can reduce the friction and operating torque. 4, V type ball valve This is a fixed ball valve, ball valve seal is a single seat, adjust the ball in the best performance, is equal percentage flow characteristic, adjustable ratio of 100:1. Its V-shaped notch between the seat and metal shearing, especially for fiber-containing, small solid particles, slurry and other media. 5-way ball valve Way ball valve with T-and L-type. Make three orthogonal T-interconnected pipeline and cut off the third channel, divert traffic, the confluence of the role. L-only connection between the two orthogonal channels, can not maintain a third pipe connected with each other only as a distribution function.
原文来自：http://www.ballvalve.org.cn

是由上海日美阀门制造有限公司提供的阀门新闻，中文译文仅供参考，以下提供站内导航搜索：

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译文：
球阀的分类：球阀按结构形式可分为：浮动球阀、固定球阀、弹性球阀和油封球阀；按通道可分为直能式球阀、角式球阀和三通式球阀等，三通式又可分为T形和L形两种。按连接方工可分为螺纹式连接球阀、法兰连接球阀和焊接式球阀三种。 1、浮动球阀球阀的球体是浮动的，在介质压力作用下，球体能产生一定的位移并紧压在出口端的密封面上，保证出口端密封。　　浮动球阀的结构简单，密封性好，但球体承受工作介质的载荷全部传给了出口密封圈，因此要考虑密封圈材料能否经受得住球体介质的工作载荷，在受到较高压力冲击时，球体可能会发生偏移。这种结构，一般用于中低压球阀。　　 2、固定球阀　　球阀的球体是固定的，受压后不产生移动。固定球阀都带有浮动阀座，受介质压力后，阀座产生移动，使密封圈紧压在球体上，以保证密封。通常在与球体的上、下轴上装有轴承，操作扭距小，适用于高压和大口径的阀门。　　为了减少球阀的操作扭矩和增加密封的可靠程度，近年来又出现了油封球阀，既在密封面间压注特制的润滑油，以形成一层油膜，即增强了密封性，又减少了操作扭矩，更适用高压大口径的球阀。　　 3、弹性球球阀（即轨道球阀）　　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。　　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。　　 4、V型球阀　　这种球阀属于固定球阀，也是单阀座密封球阀，调节性能是球阀中最佳的，流量特性是等百分比的，可调比达100:1。它的V型切口与金属阀座之间具有剪切作用，特别适合含纤维、微小固体颗粒、料浆等介质。　　 5、三通球阀　　三通球阀有T型和L型。T型能使三条正交的管道相互联通和切断第三条通道，起分流、合流作用。L型只能连接相互正交的两条管道，不能同时保持第三条管道的相互连通，只起分配作用。

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