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Model Family 71(Standard Products)

Models 71S, 171, 171P, 171S

Liquid Relief Valves

Pressure Range: 1 psig to 400 psig

Temperature Range:
-20 °F(-28.89°C) to 550 °F(1022°C)
Features and Benefits:
  • 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.
Applications:
  • Overpressure relief and protection of pumps, tanks, lines and hydraulic systems. Acid, caustic, ammonia and other corrosive liquids requiring iron, steel or Stainless Steel materials.
  • Pressure regulation.
  • By-pass relief.
  • All 316 Stainless Steel Model 171S suitable for sanitary/edible applications.

Click on the Valve Style to View a List of Products

1 - 4 of 4 Styles Available.
Valve StyleDescription
Model 71SCast iron body with Stainless Steel seat and disc. Pressure-tight hood.
Model 171Carbon Steel body with Stainless Steel seat and disc. Pressure tight hood.
Model 171PCarbon Steel body with Stainless Steel seat and disc. Packed lift lever.
Model 171SAll 316 Stainless Steel construction including spring. Available with pressure-tight hood or packed lift lever.
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