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防回流

防回流

防回流

防回流

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Designed to retrofit backflow protection onto fire hydrants used for temporary water service.

适用于用在临时性水应用的消防栓上的防回流阀的更新改造。

6

Can be temporarily removed for replacement of the backflow preventer without the need for replacement of freeze protection services .

可以暂时性拆卸，在不需要更换防冻装置的情况下，便于更换防回流阀。

7

The shutoff valve with the test cock is to be mounted on the inlet side of the backflow preventer .

带测试旋塞的关闭阀应该安装在防回流阀的进口侧。

8

Allows for the installation of the backflow preventer "at the service connection " in accordance with AWWA Standards .

允许在 “维修连接处 ”安装防回流阀，符合美国自来水厂协会的标准。

10

Strategically placed doors provide access to the backflow prevention assembly for testing and repair without removal of the entire unit .

永久性配置的门便于接近防回流阀总成进行检测和不拆卸整个装置的情况下进行维修。

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To avoid this discharge , install a spring- loaded check valve ahead of the backflow assembly to "lock-in" the downstream pressure.

为了避免这种排放，应该在防回流阀总成前面安装一个弹簧负载止回阀来 “锁定 ”下游压力。

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The 957 and 957RPDA backflow preventer should be tested by a certified tester at the time of installation .

在安装期间，957 和 957RPDA 防回流阀应该由有资格证书的检验员进行检验。

22

The user installs a dual check backflow preventer at the water meter as prescribed by the supplier of safe drinking water .

双止回阀防回流阀配置一个水表和旁路管道上的双止回阀。

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A check valve may be required ahead of the backflow preventer . *Please see "Troubleshooting " , Page 7, prior to installation .

因此在防回流阀前可能需要一个止回阀。请在安装前参阅第7 页 “故障排除 ”。

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The hose connection backflow preventer shall be in line field testable without the use of special test gauges or instruments .

这种软管防回流阀应该可以在线现场检测。不需要采用特殊的检测仪表或仪器。

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The gate valve with the test cock is to mounted on the inlet side of the backflow preventer .

带有测试旋塞的闸阀安装在防回流阀的进口一侧。

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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。

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