Models 6252, 6254 Air/Steam/Gas Relief Valves


ASME Section I Steam and ASME Section VIII, Air, Steam and Gas ‘UV’ National Board Certified. Model 6252 ASME Section IV ‘HV’ National Board Certified.

Model Descriptions

  • Model 6252: Cast iron, enclosed spring, stainless steel trim.
  • Model 6254: Same as Model 6252 except certified for ASME Code IV – Low pressure steam heating boilers. Set at 15 psig only. J through P orifice only.

Pressure and Temperature Limits

Model 6252: 10 to 250 psig -20° to 406°F


  • Steam Boilers and Generators.
  • Pressure Reducing Stations.
  • Air/Gas Compressors – reciprocating or rotary.
  • Pressure Vessels – including tanks, receivers, intercoolers, oil/gas separators, lines.


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Features and Benefits

  • Heavy duty construction of high quality cast iron with SS semi-nozzle trim and disc.
  • Bolted bonnet design for easy maintenance.
  • Seats lapped to optical flatness.
  • Dual control rings offer easy adjustability for precision opening with minimum preopen or simmer and exact blowdown control.
  • Heavy duty lift lever assembly.
  • Every valve tested/inspected for pressure setting, blowdown and leakage.
  • All adjustments are factory sealed to prevent tampering or disassembly.

Download Center

Product Literature
Installation, Operation & Maintenance
Technical Documents
Models 6252, 6254 Air/Steam/Gas Relief Valves

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