Kunkle 91

Kunkle Iron Relief Valves for Liquid Service
Model #91, 218, 228


  • Quality cast iron body and bonnet with bronze trim (insert and disc)
  • Available with optional stainless steel insert and disc
  • Spring is steel with plating for corrosion protection
  • High-lift, wing-guided disc offers high relieving capacity


  • Over pressure relief and protection of pumps, tanks, lines and hydraulic systems
  • Pressure regulation
  • Fire Pump Service, UL and FM approved


  • Sizes: 1-1/2 thru 6 inch
  • Pressure Limits: 400 PSIG – 300°F