double-check valve的意思|示意

A Double Check Valve Assembly shall be installed at each noted location to prevent the unwanted reversal of polluted water into the potable water supply.

双止回阀总成应该安装在每个值得注意的位置，用于防止污水出现不需要的回流而流进饮用水供应系统中。

DOUBLE CHECK VALVE ASSEMBLY For Low Hazard Cross-connections and continuous pressure applications.

双止回阀总成用于低危险交叉连接和持续压力应用场合。

The TK-DL can test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies.

TK - DL可以检测压力真空断路阀，减压防回流阀或双止回阀总成。

Designed to test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies, allowing you to eliminate both pressure and differential test gauges.

适用于检测压力真空断路阀，减压防回流阀或双止回阀总成，不再需要压力表和压差表。

Double Check Valve Assembly shall be installed at referenced cross-connections to prevent the backflow of polluted water into the potable water supply.

在相关的交叉连接处应该安装一个双止回阀总成，以防止受到污染的水回流到饮用水系统中。

Double disc check valve consists of body, disc, valve rod and spring and other parts. The valve is designed with slim light weight.

双瓣止回阀主要由阀体、阀瓣、阀杆及弹簧等重要零件组成，并采用薄型轻巧设计。