VELAN三偏心工作原理.doc

工作原理Principle Of Operation 美国威兰阀门公司 　　Velan三重偏心蝶阀具有双向无气泡紧密关闭性能。这种几何形状保证阀瓣密封只是在关闭位置时才与阀体阀座接触，因此不会产生摩擦或磨损，并且产生一种扭矩使得弹性密封具有足够的“焊接”性能，确必威体育官网网址封接触的均匀一致性。　　The Velan Triple Offset Butterfly Valve provides a bi-directional bubble tight shut-off. This geometry ensures that the disc seal contacts the body seat only at the final shut-off position without rubbing or galling, providing a torque generated resilient seal with sufficient “wedging” to ensure a uniform seal contact. 三重偏心几何形状THE TRIPLE OFFSET GEOMETRY 偏心1OFFSET 1 阀轴位于阀座轴后面，使得密封能够完全紧密环绕接触整个阀座。The shaft is offset behind the seat axis to allow complete sealing contact around the entire seat 偏心2OFFSET 2 阀轴中心线偏离管道和阀门中心线，这就免受阀门开启和关闭的干扰。The shaft centerline is offset from the pipe and valve which provides interference free opening and closing of the valve 偏心3OFFSET 3 阀座锥体轴偏离阀轴中心线，这样可以在关闭和开启过程中消除摩擦作用，并且实现环绕整个阀座的均匀一致的压缩密封效果。The seat cone axis is offset from the shaft centerline to eliminate friction during closing and opening and to achieve uniform compressive sealing around the entire seat.