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【英文标准名称】:BackSiphonageBackflowVacuumBreakers
【原文标准名称】:倒虹吸回流真空关闭阀
【标准号】:ANSI/ASSE1056-2002
【标准状态】:现行
【国别】:美国
【发布日期】:2002-07-25
【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】:ASSE(Organization)
【标准类型】:()
【标准水平】:()
【中文主题词】:虹吸管;建筑物服务设施
【英文主题词】:serviceinstallationsinbuildings;siphons
【摘要】:SpillResistantVacuumBreakers(hereinreferredtoas"device")areinstalledinthepotablewatersupplylinestopreventthebackflowofnon-potablewatersupplycausedbyback-siphonageonly.Theyarenotforuseinanysystemwherebackpressureisappliedtothedevice.Whenthesystemispressurizedtheventclosestopreventaflowthroughtheupstreamcheckvalve,andtoeliminateventspillage.ThisstandardappliesonlytothosedevicesclassifiedasSpillResistantVacuumBreakers-SVB.Thesedevicesaredesignedforinstallationinthoseportionsofthedomesticpotablewatersystemsthatarenormallyundercontinuouspressureconditions.Thedeviceincludesone(1)checkvalveforce-loadedclosedandanairinletventvalveforceloadedopentoatmosphere,positioneddownstreamofthecheckvalve,andlocatedbetweenandincludingtwo(2)tightlyclosingshut-offvalvesand(2)testcocks.
【中国标准分类号】:P97
【国际标准分类号】:91_140_80;23_160
【页数】:
【正文语种】:英语