Kunkle Safety Relief Valve 71S - Fast & Free Shipping!


Kunkle Safety Relief Valve 71S - Fast & Free Shipping!

Regular price $436.00

Kunkle Model 71S Liquid Relief Valve 

Extra heavy, rugged construction non-code liquid relief valves with a variety of model options to meet specific applications


  • Suitable for back pressure to 50 psi (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


  1. Back pressure increases set pressure on a one to one basis, and reduces capacity. Back pressure in excess of 10% of set pressure is not recommended.


Technical Data 

Suitable for overpressure relief, pressure regulation, by-pass relief and protection of pumps, tanks, lines and hydraulic systems containing acid, caustic, ammonia and other corrosive liquids requiring iron, steel or SS materials.

Connections: FNPT

Temperature range:

-20°F to 406°F

(-29°C to 208°C)


Pressure range:

Model 71S:

1 to 250 psi

(.07 to 17.2 barg)


This item immediately ships directly from our warehouse for free. We offer a complete money-back guarantee and always offer the best online rates.