• Kofloc Variable Primary Pressure Flow Controller Model 2204 Series

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


    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.


    1.Stable flow control
    A non-rotary needle valve composed of high-precision components ensures smooth control of even ultra-minute flows.

    2.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).

    3.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. 


    1.Physical and chemical appliances
    2.Control of the second-stage operation of pumps
    3.Various instruments for analysis
    4.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.
    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)
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