These sturdy bronze relief valves are used for overpressure relief and protection of pumps, tanks, lines and hydraulic systems, pressure regulation and continuous bypass relief. Non-coded liquid relief valves, all models have stainless steel springs for corrosion resistance.

Model Descriptions:

Non-code Bronze Liquid Relief Valves

  • Model 19: All bronze; equipped with handwheel for easy adjustment within spring ranges.
  • Model 19M: Same as model 19 except stainless steel (SS) trim (seat and disc). Available 2 ½” and 3” only. For higher pressure settings or severe applications.
  • Model 20: All bronze, with pressure-tight cap. Suitable for maximum back pressure of 50 PSIGPSIG.
  • Model 20M: Same as model 20 except SS trim. Available in 2 ½” and 3” only (seat and disc). For higher pressure settings or severe applications. Maximum back pressure of 50 PSIG.
  • Model 20P: Same as model 20 except has packed lift lever. Suitable for maximum back pressure of 50 PSIG.
  • Model 20MP: Same as model 20M except has packed lift lever. Maximum back pressure of 50 PSIG.
  • Model 200A: Special non-chattering design. Recommended for light oils and continuous by-pass or pressure regulation. UL842 listed for light oil service. Available in ¾” to 1 ½” sizes.
  • Female NPT connections only.
  • Model 200H: Same as Model 20. UL842 listed for use with fuel oils. Available in ¾” to 2” sizes.

Features:

  • Both inlet and outlet connections are cast integral with body to permit easy inspection and servicing without disconnecting piping.
  • Beveled seats lapped for optimum performance.
  • SS spring for optimum corrosion resistance.
  • Each Kunkle valve is tested and inspected for pressure setting and leakage.

Applications:

  • Non-code liquid relief
  • -Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
  • Pressure regulation.
  • Continuous by-pass relief.

Pressure and Temperature Limits:

  • Models 19, 20
    • 1 to 300PSIG
    • -60° to 406°F
  • Models 19M, 20M
    • 1 to 500 PSIG
    • -60° to 406°F
  • Models 200A, 200H
    • 1 to 200 PSIG
    • -60° to 406°F

Options:

  • Available with optional female NPT inlet or flanged inlet and outlet connections.
  • Model 20D
    • Variation 05: 50 to 150 PSIG spring range
    • Variation 06: 100 to 300 PSIG

Please refer to the Kunkle Catalog or Contact Us for additional information.