止回节流阀 one way throttle ; restrictor check valve ; one way restrictor valve
溢流止回阀 excess flow check valve
止回阀配流泵 check-valve pump ; valve pump
截止止回节流阀 Serew-down stop check and throttle ; Serew-down stop check and throttle valve
轴流式止回阀 Aaxial flow check valve
减压回流防止阀 Reduced pressure zone backflow preventer
节流止回阀 throttling non return valve
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.
用户要由安全饮用水供应商在水表处安装法定的双止回防回流阀。
The user installs a dual check back flow preventer at the water meter as prescribed by the supplier of safe drinking water.
这种双止回防回流阀应该按照美国国家标准化组织(ASSE)标准1024进行设计。
The dual check backflow preventer shall be designed under the ASSE Standard 1024.
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