Kunkle Model 19/19M/20/20M/20P/20MP/200A/200H Liquid Relief Valves

Safety And Relief Products

Extra-heavy rugged construction non-code bronze liquid relief valves with a variety of model options to meet specific applications

Liquid Relief Valve Model 19 and 20


  • Inlet and outlet connections cast integral with body for easy inspection and servicing without disconnecting piping.
  • Available with optional female NPT inlet or flanged inlet and outlet connections.
  • Beveled seats lapped for optimum performance.
  • Stainless steel spring for optimum corrosion resistance.
  • Spherical pivot between disc and spring corrects misalignment and compensates for spring side thrust.
  • Tested and inspected for pressure setting and leakage.

General Application

A range of valves suitable for overpressure relief and protection of pumps, tanks, lines and hydraulic systems; pressure regulation and continuous by-pass relief.

Technical Data

Connections: Threaded NPT or flanged
Temperature range: -60° to 406°F (-51° to 208°C)
Pressure range[1]: 1 to 500 psig (.07 to 20.7 barg)

1. See page 5 for specifications table.