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Kunkle Pressure Relief Valve 337 - 2"

The Kunkle 337 is a pressure relief valve that can be purchased preset per your requirements up to a maximum pressure of 60 psig and a minimum pressure of 1 psig.



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The 337 Kunkle pressure relief valve can be purchased preset per your requirements up to a maximum pressure of 60 psig and a minimum pressure of 1 psig. 337 Kunkle Pressure Relief Valve Features:
  • Large nozzle design provides high capacity.

  • Flat bronze valve seares are lapped for optimum performance.

  • Warn ring offers easy adjustability for precise opening with minimum pre-open simmer and exact blower down control.

  • Pivot Between disc and spring corrects misalignment and compensates for spring side thrust.

  • A lift handle is provided for easy manual testing.

  • Protects low to medium pressure blowers and compressors. It is well suited for positive displacement blowers.


337 Kunkle Pressure Relief Valve Connections:

  • 2" MPT (Male Pipe Thread) fitting for mounting on system

  • 2" FPT (Female Pipe Thread) fitting to allow for piping away the relief flow


Materials of Construction:

  • Nozzle - Bronze, SB62

  • Set Screw A108-1018 Brass Plated

  • Regulator Ring - Bronze B584-C84400

  • Disc - Bronze B584-C84400

  • Spring Step - Steel A109 Coated

  • Spring - SS A313-302

  • Body - Cast Iron A-126, Class A or B

  • Compression Screw - Bronze B584-C84400

  • Stem - Brass B16

  • Regulator Ring Set Screw - Brass B16


Weight: 8 lb (3.6 kg)
The 337 Kunkle Pressure Relief Valve will not have a code stamp or 'NB' on nameplate below 15 psig setting.
Capcities based on Air (SCFM)