Modular check construction featuring nonreversible checks with captured springs for simplified servicing.

模块止回阀结构特点在于不可逆止回，配置简的复位弹簧。

A strainer is recommended to be installed ahead of the backflow preventer to prevent the fouling of the check assembly and resulting spillage from the valve during repressurization.

建议在回流阀前安装一个，止由于止回阀总成受到污染而导致这种阀门在再增压期间产生泄漏或溢出。