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» » » » » Variable Primary Pressure Flow Controller Kofloc 2204 SERIES

Variable Primary Pressure Flow Controller
(Not subject to supply pressure variations)

Kofloc Model 2204 Series

Model 2204 Variable Primary Pressure Flow Controller is a control valve that always keeps flows at a constant rate under a given constant level of secondary pressure (outlet pressure) even when the primary pressure (inlet pressure) fluctuates.
The built-in precision needle valve accurately controls flows to the set flow rate, including ultra-minute flows.


  • Stable flow control

    • A non-rotary needle valve composed of high-precision components ensures smooth control of even ultra-minute flows.
  • Not subject to supply pressure fluctuations

    Flows are protected from being affected by primary pressure (supply pressure) fluctuations, under a given constant level of secondary pressure (outlet pressure).
  • Cleanliness ensured

    All the high-precision components are super-cleaned before assembly so that the product can be safely used even on high-sensitivity instruments for analysis for which cleanliness is essential.


  • Physical and chemical appliances
  • Control of the second-stage operation of pumps
  • Various instruments for analysis
  • Environmental instrumentation systems

Standard Applications

  • Rated flow ranges : Gas: 10 ML/min–10 L/min
  • Control accuracy: Within the set flow ±2% when the primary pressure (inlet pressure) changes by 0.3MPa in a range between 0.07 MPa and 0.8 MPa.
  • A number of turns of regulating screw: Approx. 12 turns
  • Maximum operating pressure: 0.8 Mpa
  • Maximum operating temperature: 60℃
  • Materials of parts in contact with fluids :
    • (A) Al, brass, POM, NBR, SUS316
    • (SS) SUS316, fluorocarbon resin, FKM
  • Connection end : Rc 1/8 (M8 + Rc 1/8)
More information please Email Marketing@wmablog.com

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