ASME Section IV capacity certified bronze safety relief valve for protection of hot water heating boilers, systems and similar equipment. It can be pre-set to any pressure ranging from 15 to 160 psig (1 to 11 bar) at 250 DegreeF (121 DegreeC) max.Sizes: 3/4" - 2" (20 - 50mm)ASME Section IV Certified CapacityCorrosion Resistant ConstructionExtremely High CapacityDiaphragm Isolated Spring Chamber
made in the USA