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。
Swing-type check off er the least pressure drop and offer simple automatic closure; when fluid flow stops gravity and flow reversal closes valve.
止回阀是自动运行的装置。
止回阀属于自动阀类，主要用于介质单向流动的管道上，只允许介质向一个方向流动，以防止发生事故。
Check Valves are automatically used one-way flow of media channels, the media only allows flow in one direction in order to prevent accidents.
检查自动给水系统的止回阀，截止阀等各阀是否正确开启或关闭。
Examine the check valve, cut off valve of auto water supplying system see if open or close correct.
止回阀是防止介质倒流的自动阀门，流体从进口侧流向出口侧。
Check valves are automatic valves to prevent the media back, fluid from the inlet to outlet side to side.
进口止回阀又称单向阀或逆止阀，是能自动阻止流体倒流的阀门。
Imports, also known as one-way valve or check valve check valve is automatically prevent fluid backflow valve.
止回阀是利用阀前阀后的压力差而自动启闭的阀门，它的作用是使介质只做一个方向的流动，而阻止其逆向流动。
Check valve before the valve is to use the pressure after poor hoist the automatic valve, it is the role of the media flows only in one direction, reverse and stop its flow.
止回阀是利用阀前阀后的压力差而自动启闭的阀门，它的作用是使介质只做一个方向的流动，而阻止其逆向流动。
Check valve before the valve is to use the pressure after poor hoist the automatic valve, it is the role of the media flows only in one direction, reverse and stop its flow.
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