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McDonnell Miller Series 260 Pressure Relief Valves

Pressure Relief Valves
Series 260

• For water tanks and hydronic heating systems
• Protects against over-pressure
• Minimizes hammering with flash steam
• Low differential pressure – 3 psi (.21 kg/cm²) between opening and closing
• Sealed spring chamber prevents scale or sediment buildup around seal
• Cast iron body, brass seat
• Maximum temperature 250°F (121°C)
• Maximum operating pressure range 30 - 50 psig
(2.1 - 3.5 kg/cm²)

Select a link under the "item" tab below to order.

Cat #DescriptionsPart NumberWeight Ibs.(kg)
260-1 1/2IN-30Relief Valve 1½ NPT, 30 psi (2.1 kg/cm²)18262517.3 ( 7.8)
260-1 1/2IN-36Relief Valve 1½ NPT, 36 psi (2.5 kg/cm²)18272517.3 ( 7.8)
260-1 1/2IN-40Relief Valve 1½ NPT, 40 psi (2.8 kg/cm²)18273017.3 ( 7.8)
260-1 1/2IN-45Relief Valve 1½ NPT, 45 psi (3.2 kg/cm²)18282517.3 ( 7.8)
260-1 1/2IN-50Relief Valve 1½ NPT, 50 psi (3.5 kg/cm²)18292517.3 ( 7.8)


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