Definox DCX3 – DCX4 Diaphragm Shut Off And Divert Flow Control Valves

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Definox Diaphragm DCX3 – DCX4 Single Sealing Shut Off and Divert Valves


Size Range: 1”, 1-1/2”, 2”, 2-1/2”, 3”, 4”, 6”


Body/Stem: 316L SS

Operator: 304 SS

Valve seals: PFA floating plug seal, PTFE diaphragm type stem/body seal

Optional seals: EPDM, FKM, or Silicone plug seal

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

Options: Dual microvalve alcohol barrier

Signal Equipment: ICS Control top – valve sizes 1” – 3”, ACS Control top – valve sizes 4” – 6”, Network options: point-to-point & AS-i (others upon request)

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

Manufactured by Definox


  • Patented PFA floating plug seal that is easily cleaned during CIP and offers outstanding sealing at high temperatures and excellent chemical resistance.
  • PTFE diaphragm type stem/body creates a barrier between the interior of the valve and the outside environment.
  • Integral microvalve to indicate PTFE diaphragm failure.
  • Heavy-duty stainless steel pneumatic actuator that is capable of function changes:  NO (Normally Open) – NC (Normally Closed) – DA (Double Acting).
  • Clamp-style operator connection (manual and automated) for easy inspection and maintenance.
  • Heavy wall machined spherical bodies guarantee excellent resistance to thermal expansion and contraction.
  • Wide variety of body configurations: DCX3 (L) – (T) – (X) / DCX4 (L/L) – (L/T) – (T/L).

Service Conditions

Max. temperature: 284°F (depending on seal type)

Min. temperature:  34°F

Max. working pressure: 116 psi

Actuator air supply: 80 psi Minimum / 116 psi Maximum

Vacuum resistance: 0.4 cm3/s

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