止回阀：止回阀又称单向阀或逆止阀，其作用是防止管路中的介质倒流。水泵吸水关的底阀也属于止回阀类。启闭件靠介质流动和力量自行开启或关闭，以防止介质倒流的阀门叫止回阀。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 Valve: valve check valve or check valve, also known as, its role is to prevent the media back in the pipeline. Pump water off the bottom valve check valve also belongs to class. Hoist pieces by medium flow and forces to open or close the valve to prevent backflow media called check valve. Check valves are automatic valves, mainly for the medium one-way flow of the pipeline, only to allow media to flow in one direction, to prevent accidents.

不锈钢止回阀产品特征

公称压力：1.6～6.4MPa

适用温度范围：≤200℃～≤350℃

适用介质：硝酸类、醋酸类、水、油、气类及某些腐蚀性液体。