原文：
        止回阀是指依靠介质本身流动而自动开、闭阀瓣，电磁阀用来防止介质倒流的阀门。　

　止回阀根据其结构可分：

　　一、升降式止回阀：阀瓣沿着阀体垂直中心线滑动的止回阀，升降式止回阀只能安装在水平管道上，在高压小口径止回阀上阀瓣可采用圆球。截止阀升降式止回阀的阀体形状与截止阀一样(可与截止阀通用)，因此它的流体阻力系数较大。

　　二、旋启式止回阀：阀瓣围绕阀座外的销轴旋转的止回阀，旋启式止回阀应用较为普遍。　　三、碟式止回阀：阀瓣围绕阀座内的销轴旋转的止回阀。止回阀碟式止回阀结构简单，只能安装在水平管道上，密封性较差。　　四、管道式止回阀：阀瓣沿着阀体中心线滑动的阀门。水力控制阀管道式止回阀是新出现的一种阀门，它的体积小，重量较轻，加工工艺性好，安全阀是止回阀发展方向之一。但流体阻力系数比旋启式止回阀略大。

“ Valve knowledge ”是由中国止回阀网提供的阀门新闻，译文仅供参考。另外，中国止回阀网还提供相关产品搜索： 旋启式止回阀、 升降式止回阀、 对夹式止回阀、 消声止回阀、 微阻缓闭止回阀、等。

译文：
      Check valve is to rely on their mobile media automatically open and close the valve flap, is used to prevent the media from the valve back. Check valve in accordance with its structurePLUG VALVES can be divided into: First, lift check valve: valve body valve along the vertical centerline of sliding valve, lift check valves canMUD VALVES only be installed in horizontal pipes, in the high-pressure small-bore ball valve on the valve flap can be used . Lift check valve in the body shape and the same cut-off valve (with valve common), so it is more fluid drag coefficient. Second, swing check valve: valve seatREDUCING VALVES around the outside flap of the valve pin rotation, swing check valves of more general use. 3, disc type check valve: valve within SAFETY VALVES the valve seat around the valve pin rotation. Simple disc check valve, can only be installed in horizontal pipe, sealing worse. 4, pipeline valve: valve valve slide along MULTI-FUNCTIONAL WATER PUMP CONTROL VALVEthe centerline of the valve body. Pipe-type check valve is emerging as a valve, its small size, light weight, good processing, is one of valve development. But the fluid drag coefficient slightly larger than the swing check valves.

原文来源：http://www.1zhihuifa.com/

2010-07-28 08:07

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