Product details:
ASME Section IV Safety Relief Valves - Pressure range: 15 to 160 psig Max. temp.: 250°FProtect 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.