Kunkle Cast Iron Liquid Relief Valve Models 91, 218, 228

Made with cast iron and bronze trim, this tough valve is used with fire pump service (UL and FM approved – models 218 and 228), overpressure relief and protection of pumps, tanks, lines and hydraulic systems. Also good with pressure regulation, optional stainless steel trim available.

Model Descriptions:

Cast Iron Liquid Relief Valves

  • Model 91: Bronze or stainless steel trim with pressure-tight cap. Suitable for maximum back pressure of 60 PSIG. Variation “03” for field adjustability.
  • Model 218: Bronze or stainless steel trim. UL and FM approved for fire pump installations. Special design offers minimum set pressure of 60 PSIG. Easily adjustable with handwheel to 200
  • PSIG (175 PSIG with optional 125# inlet flange).
  • Model 228: Bronze or stainless steel trim with pressure-tight cap. UL and FM approved for fire pump installations. Suitable for maximum back pressure of 60 PSIG. Supplied with handwheel.

Features:

  • Bolted bonnet permits easy inspection and servicing without removal from system.
  • Quality cast iron body and bonnet, insert and disc are available in either bronze or stainless steel (SS) and lapped for optimum performance.
  • Springs are steel with plating for corrosion protection.
  • High lift, wing-guided disc offers high relieving capacity. Pivot between disc and spring corrects misalignment and compensates for spring side thrust.
  • Each Kunkle valve is tested and inspected for pressure setting and leakage.

Applications:

  • Fire pump service, UL 1478 listed and FM approved (Models 218, 228).
  • Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
  • Pressure regulation.

Pressure and Temperature Limits:

  • Model 91
    • 5 to 400 PSIG
    • -20° to 406°F
  • Models 218, 228
    • 60 to 200 PSIG
    • -20° to 406°F

Options:

  • Variation 02: SS trim (insert and disc).
  • Female x female NPT connections (1 1/2“ to 4” sizes).
  • Inlet and outlet flanges per ANSI B16.1-125#. Limited to 175 PSIG maximum set pressure.
  • Epoxy-coated internal body and bonnet. Temperature limit 125°F [52°C].

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