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ANSI/ASSE 1012-2002 有中气压通风口的防回流装置的性能要求

ANSI/ASSE 1012-2002 有中气压通风口的防回流装置的性能要求

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【英文标准名称】: Performance Requirements for Backflow Preventer with Intermediate Atmospheric Vent
【原文标准名称】: 有中气压通风口的防回流装置的性能要求
【标准号】: ANSI/ASSE 1012-2002
【标准状态】: 作废
【国别】: 美国
【发布日期】: 2002
【实施或试行日期】:
【发布单位】: 美国国家标准学会(US-ANSI)
【起草单位】: ANSI
【标准类型】: ()
【标准水平】: ()
【中文主题词】: 反虹吸系统;效率;虹吸管
【英文主题词】: Anti-siphonage systems;Efficiency;Siphons
【摘要】: Backflow Preventers with Intermediate atmospheric Vent are installed in the plumbing to prevent backflow in potable water supply lines due to the creation of back pressure or back-siphonage in which reversal of the normal direction of flow could cause or allow pollutants to enter the potable water supply system. The devices covered by this standard are those which have functional capabilities for preventing both backsiphonage and back pressure backflow in the water supply lines, and which can operate under continuous or intermittent pressure conditions. These devices have tow independently operating check valves separated by an intermediate chamber with a means for automatically venting it to the atmosphere. The check valves re force loaded to a normally closed position and the venting means is force loaded to a normally open position.
【中国标准分类号】: P48
【国际标准分类号】: 23_060_50;91_140_01
【页数】:
【正文语种】: 英语

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