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。
The TK-DL can test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies.
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。
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.
美国瓦茨双止回防回流阀可以按照连接类型、通径和接头构成许多不同的组合。
Watts Dual Check Backflow Preventers can be specified in many different combinations of connection types, sizes, and union options.
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