Kunkle Models 6252/6254 Safety Valves

Safety And Relief Products

Cast iron ASME section I steam and section VIII, air, steam and gas ‘UV’ National Board certified safety valves including model 6254 to ASME section IV ‘HV’, PED certified for non-hazardous gas


  • Heavy duty high quality cast iron construction with stainless steel 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 pre-open or simmer and exact blowdown control.
  • Heavy duty lift lever assembly.
  • All adjustments factory sealed to prevent tampering or disassembly.
  • Each valve tested and inspected for pressure setting and leakage.
  • Valves available National Board certified to ASME sections I, VIII and IV, and PED certified for non-hazardous gas.

General Application

Suitable for use on steam boilers and generators, pressure reducing stations, reciprocating or rotary air/gas compressors and for pressure vessels including tanks, receivers, intercoolers, oil/gas separators and lines.

Technical Data

Connections: FNPT or flanged
Temperature range: -20° to 406°F (-29° to 208°C)
Pressure range: 10 to 250 psig (0.7 to 17.2 barg)
Code: ASME I, IV, VIII and PED

1. ASME code valves made from cast iron A126 may not be used in lethal or flammable service.