McDonnell & Miller Pressure Relief Valves

Features and Benefits of McDonnell & Miller Pressure Relief Valves

  • For tanks and hydronic heating system
  • 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

Sizes and material

  • - 3/4? - 1? NPT - bronze body and seat
  • - 2? NPT - cast iron body, brass seat
  • EPDM rubber diaphragm and seat disc
  • Maximum temperature 250°F (121°C)
  • Maximum operating pressure range 30 - 125 psig (2.1 - 8.8 kg/cm2)

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