{"v":"2.0","page_type":"product","title":"ASME Section IV Safety Relief Valves Pressure range: 15 to 160 psig Max. temp.: 250?F Protect against excessive water pressure due to failure of controls to regulate BTU input. High BTU capacity rating. Corrosion-resistant with silicone seat. Fabric reinforced, molded diaphragm isolates spring from water at all times. FNPT connections. Designed for boilers, heating systems, and unfired pressure vessels. Meet ASME Section IV Coded for hot water; HV National Board Certified and CRN. This listing is for each. Technical Specification Item Safety Relief Valve Body Material Bronze Inlet Type FNPT Outlet Type FNPT Inlet Size 1-1/2' Outlet Size 1-1/2' Factory Set Pressure 150 psi Pressure Range 15 to 160 psi BtuH 11, 871, 000 Disc Material Brass ASTM B16 Overall Height 10-3/4' Application Hot Water Heating Boilers and Hot Water Supply Systems Overall Length 5-7/8' Seat Material Silicone Spring Material Plated Alloy Steel Temp. 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