Model Descriptions
Model 71S: Cast iron body with SS seat and disc. Pressure-tight hood.
Model 171: CS and SS seat and disc. Pressure-tight hood.
Model 171P: Same as 171 with packed lift lever.
Model 171S: All 316 SS construction including spring. Pressure-tight hood.
Model 171S Variation 02: Same as 171S with packed lift lever.
Pressure and Temperature Limits
Models 71S: 1 to 250 psig -20o to 406oF
Models 171, 171P, 171S, 171SP: 1 to 400 psig -20o to 406o
- Suitable for back pressure to 50 psig (3.45 barg)
- Seats lapped for optimum performance.
- Spherical pivot between disc and spring corrects misalignment and compensates for spring side thrust.
- Stainless steel springs.
- Tested and inspected for pressure setting and leakage.
- All SS 316 model 171S suitable for sanitary applications, depending on requirements.
- Beveled seats lapped for tight shut-off.
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.
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