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- 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。
- Series 719 Double Check Valve Assembly shall be installed at each noted location. 系列719双止回阀总成应该安装在每个标注的位置上。
- 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 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。
- 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。
- Only those cross-connections identified by local inspection authorities as non-health hazard shall be allowed the use of an approved double check valve assembly. 只有那些经过当地有关检查主管部门认定为非健康危害的交叉连接才应该允许采用经过认证的双止回阀总成。
- Series 775 Double Check Valve Assemblies provide protection of the potable water supply for non-health hazard cross-connections. 系列775双止回阀总成防止交叉连接处非健康危害的流体污染饮用水供应系统。
- Series SS007QT Stainless Steel Double Check Valve Assemblies provide protection of the potable water supply for non-health hazard cross-connections. 系列SS007QT不锈钢双止回阀总成为非健康危害交叉连接处的饮用水提供保护。
- Series 774X Double Check Valve Assemblies are designed to prevent the reverse flow of polluted water from entering the potable water system. 系列747双止回阀总成用于防止污水回流进入饮用水系统中。
- 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。
- Series774 Double Check Valve Assemblies are designed to prevent the reverse flow of polluted water from entering into the potable water system. 系列747双止回阀总成用于防止污水回流进入饮用水系统中。
- Series 719 Double Check Valve Assemblies are designed to protect drinking water supplies from dangerous cross connections in accordance with national plumbing codes and water authority requirements. 系列719双止回阀总成用于保护饮用水不会受到危险的交叉连接的影响,符合美国管道产品有关规定及水主管部门的有关要求。
- Double Check Valve Assemblies shall consist of two positive seating check valves located between two resilient seated shutoffs with four ball valve type test cocks. 这种双止回阀总成应该由两个正向密封止回阀，夹在两个弹性阀座关闭阀之间，并配置四个球阀型测试旋塞构成。
- Testing - Double Check Valve Assemblies 检测-双止回阀总成
- Secure with locknut and gaskets. Install valve assembly. 用放松螺母和垫圈紧固。安装阀门总成。
- Check valve guiding shall be plastic to plastic. 止回阀引导装置应该是塑料对塑料。
- Remove check valve and valve seal from booster. 从倍力器上卸去逆止阀和阀门密封。
- Connect vacuum hose to booster check valve. 连接真空软管到增压器检测阀。
- To test for tightness of second check Valve. 检测第二止回阀的密封性。
- Kit consists of: Relief Valve Assembly, RV Spring, and RV Cover O-ring. 组件包括：安全阀总成，安全阀弹簧，和安全阀阀盖O形环。
