Kunkle Relief Valves Models 71S, 171, and 171S

Non-code liquid relief valves

Model 71S: Cast iron body with stainless steel seat and disc. Pressure-tight hood.

Model 171: Carbon steel with stainless steel seat and disc. Pressure-tight hood.

Model 171P: Same as model 171 with packed lift lever.

Model 171S: All 316 stainless steel construction including spring.

Product Features

  • Extra heavy, rugged construction
  • Seats lapped for optimum performance
  • Stainless steel springs
  • Ball pivot between disc and spring corrects misalignment and compensates for spring side thrust

Specifications

  • Sizes 1/2″ to 2″
  • Suitable for back pressure to 50 psig
  • Model 71S: Pressures from 1 to 250 psig; Temperatures from -20°F to 406°F
  • Models 171, 171P, 171S: Pressures from 1 to 400 psig; Temperatures from -20°F to 550°F

Service

  • Acid
  • Caustic
  • Ammonia
  • Other corrosive liquids requiring iron, steel, or stainless steel materials

Applications

  • Overpressure relief, pressure regulation, and continuous bypass relief of pumps, tanks, lines, and hydraulic systems
  • Model 171S is suitable for sanitary applications depending on requirements
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