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

模块化止构特点在于不可逆止，配置简化维修的复位弹簧。

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.

建议在流前安装一个过滤器，止由于止总成受到污染这种门在再增压期间产生泄漏或溢出。