Marketing InformationASME Section IV Capacity Certified Bronze Safety Relief Valves protect ASME Section IV hot water heating boilers and hydronic heating systems. High capacity design features corrosion resistant construction. Brass, satin or polished chrome finishes available. Proudly made in the USA.ASME Section IV Certified Capacity (20-60 psi only)15-60 psig (1.4 - 4.1 bar) Set Pressure at 250 degreeF (121 degreeC) maxCorrosion Resistant ConstructionRegistered in all Canadian Provinces and Territories, CRN lb0G8547.5CStainless Steel Springs StandardOptional Satin or Polished Chrome Finish