Valves

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

Catalogs

Installation/Operation Manuals

Parts Lists