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.

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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.

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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.

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