reversal valve 可逆阀
change valve reversal valve 换向阀
reversal spool valve 换向滑阀
Rotary Reversal Valve 旋转式换向阀
pneumatic reversal valve 气控换向阀
electromagnetic reversal valve 电磁换向阀
reversal valve of large capacity 大流量换向阀
air reversal valve 空气换向阀
The in-line spring-actuated lift check also is referred to as the "silent check" because the spring closes the valve before gravity and fluid reversal can slam the valve closed.
由于这种止回阀能够在重力和介质倒流撞击启闭件之前关闭阀门，因此这种直通弹簧驱动升降式止回阀也称为“静音”止回阀。
Swing-type check off er the least pressure drop and offer simple automatic closure; when fluid flow stops gravity and flow reversal closes valve.
旋启式止回阀压降最小，能够完全自动关闭，即在介质流动停止、重力和介质倒流的状态下自动关闭阀门。
Slamming of check valves is the result of failure of the valve disc to reach its closed position before the fluid flow reversal.
止回阀的撞击现象，是由于在流体倒流之前，阀门的阀瓣没有到达关闭位置造成的。
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