This 3/4 IN boiler pressure relief valve is used in hot water space heating boiler applications to protect against excessive pressure on all types of hot water space heating boiler equipment. It consists of an iron body construction with expanded outlet drain connections for hot water space heating boilers, non-metallic disc-to-metal seating, stainless steel spring, and test lever. It offers large discharge capacity, resists corrosive water conditions, resists sticking and freezing, and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief, not as an operating control. The pressure relief is set at 30 PSI (206.8 KPA) with corresponding high pressure ratings up to 925000 BTU/HR.

Boiler Water Pressure Relief Valve, Series/Model: Series 740 HC/M1, Nominal Size: 3/4 X 1 IN, Connection Type: Female, Pressure Rating: 30 PSI, Iron Body Material, Test Lever Handle Operator Type, Handle Material: Stainless Steel, Industry Standards: Tested And Rated By The National Board of Boiler And Pressure Vessel Inspectors To The Requirement Of ASME, Meets Military Spec. MIL-V-18634B, Type I, Class 3A, Style A, 3 IN Width, 5-5/8 IN Height, Lead Free: No, Additional Specifications: Temperature Steam Rating (CSA): 1886000 BTU/HR

• Iron body construction
• Automatic reseating
• Spring loaded

• Instruction/Installation Manual https://macombstage.cimm2.com//ASSETS/DOCUMENTS/ITEMS/EN/Watts_0274428_Instruction_Installation_Manual.pdf
• Specification Sheet https://macombstage.cimm2.com//ASSETS/DOCUMENTS/ITEMS/EN/Watts_0274428_Specification_Sheet.pdf
• Warranty Information https://macombstage.cimm2.com//ASSETS/DOCUMENTS/ITEMS/EN/Watts_0009108_Warranty_Information.pdf