Kunkle Models 541/542/548 Safety Valves

Safety And Relief Products

Brass or stainless steel safety valves with a choice of Buna-N (NBR), Viton® (FKM) or stainless steel seats that meet ASME section VIII, ‘UV’, for air/gas and are National Board certified


  • High capacity with small size.
  • Top guided disc.
  • Manual lift ring.
  • Factory sealed to prevent tampering or disassembly.
  • Each valve tested and inspected for pressure setting and leakage.
  • Canadian registered

Models Overview

  • Model 541: ¼” or ½” male inlet thread. Buna-N (NBR) flat seal. Exceptional seat tightness performance.
  • Model 542: As model 541 except Viton® (FKM) flat seal.
  • Model 548: As model 541 except stainless steel (SS) ball seat.

1. Stainless steel construction temperature range -20° to 200°F (-29° to 93°C).

General Application

Suitable for use on small to medium size single and multi-stage air compressors, intercoolers, aftercoolers, instrument/control air lines and systems. Also for air tanks/receivers and pressurized equipment.

Technical Data

Connections: Threaded NPT or BSPT
Temperature range:
Model 541[1]: -40°F to 200°F (-40°C to 93°C)
Model 542: -10°F to 300°F (-23°C to 149°C)
Model 548: -60°F to 400°F (-51°C to 204°C)
Pressure range:
Model 541: 3 to 200 psig (0.2 to 13.8 barg)
Model 542: 3 to 200 psig (0.2 to 13.8 barg)
Model 548: 3 to 400 psig (0.2 to 27.6 barg)