Pressure Relief Valves

Series 250/260 Pressure Relief Valves

Features and Benefits

• For 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
• Meets ASME Pressure Vessel and Boiler Code, Section IV
• Maximum temperature 250°F (121°C)
• Maximum operating pressure range 30 – 125 psig (2.1 – 8.8 kg/cm2) – Series 250
• Maximum operating pressure range 30 – 50 psig (2.1 – 3.5 kg/cm2) – Series 260

Sizes and Materials – Series 250

•  3⁄4″ – 1″ NPT – bronze body and seat
•  2″ NPT – cast iron body, brass seat
• EPDM rubber diaphragm and seat disc

Sizes and Materials – Series 260

• 1 1/2″ NPT Inlet and 2″ NPT Discharge– cast iron body and brass seat