Definox DCX3 Relief Flow Control Valves

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Size Range: 1”, 1-1/2”, 2”, 2-1/2”, 3”, 4”


Body/Stem: 316L SS

Operator: 304 SS

Valve seals: PFA floating plug seal, FKM stem seal & body seal

Optional seals: EPDM, FKM, or Silicone plug seal, EPDM, FKM, or Silicone stem & body seal

Connections: OD tube butt weld, Sanitary clamp, Others upon request

Options: Air assist with the regulator for increased relief pressures

Surface Finish: Ra Interior = 32Ra, Ra Exterior = 40-50Ra


  • Predetermined desired relief pressures allow the valve to relieve main piping overpressure which protects system equipment and piping.
  • The valve is able to be activated to the open position for clean-in-place (CIP) operations.
  • Heavy-duty stainless steel pneumatic actuator that is able to be fitted with a variety of springs to achieve desired relief pressures.
  • Clamp-style operator connection for easy inspection and maintenance.

Service Conditions

Pressure tolerance: /- 15% of set pressure

Max. temperature: 248°F (depending on seal type)

Min. temperature:  23°F

Max. working pressure: 116 – 174 psi (valve size dependant)

Actuator air supply: 80 psi Minimum / 116 psi Maximum

Vacuum resistance: 0.4 cm3/s

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