McDonnell & Miller 182730

260-1-½-40, Relief Valve 1-½” NPT, 40 psi (2.8 kg/cm2)

For water tanks and hydronic heating systems

Specifications

• Protects against over-pressure
• Minimizes hammering with flash steam
• Low differential pressure - 3 psi (.21 kg/cm2) between
• opening and closing
• Meets ASME Pressure Vessel and Boiler Code, Section IV
• Sealed spring chamber prevents scale or sediment build-up around seal
• 1-½” NPT Inlet and 2” NPT Discharge
• Cast iron body, brass seat
• Maximum temperature 250 Deg. F (121 Deg. C)
• Maximum operating pressure range

30 - 50 psig (2.1 - 3.5 kg/cm2)