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Models 71S and 171

Cast iron body with SS seat and disc. Pressure-tight hood.

Features

  • Suitable for back pressure to 50 psig.
  • Seats lapped for optimum performance.
  • Ball bearing pivot between disc and spring corrects misalignment and compensates for spring side thrust.
  • SS spring.
171

Model 171

Pressure Limit:1 to 400 psig
Temperature Limit:-20° to 550° F

Applications

  • Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
  • Acid, caustic, ammonia and other corrosive liquids requiring iron, steel or SS materials.
  • Pressure regulation.
  • By-pass relief.

Cast Steel with SS seat and disc. Pressure-tight hood.

171