Kofloc RK1250 Series Precision Needle Valve Flow Meter

Kofloc RK1250 Series Flow meter is a completely renewed model of the existing KOFLOC RK1200, designed as a flow meter that can be integrated into the customer’s equipment. A happy combination of a grade high precision float type flowmeter with a needle valve capable of very accurate flow control provides a flowmeter ideal for measurement and control of trace flows.

Kofloc RK1250 Series Features

  • Capable of controlling
    • Ultra-minute flows can respond to a wide range of flows from ultra-minute flows of 0.5-3 ml/min to flows of 3-30 l/min.
  • The incorporated precision needle valve allows a delicate control of flows.
    • The effective revolving speed of the needle valve can be maximized by specifying a maximum flow and normal supply pressure.
  • Wide Variations
    • Four total lengths of the flowmeter are available:126,156,206, and 256 mm, for your selection according to your needs.
  • Two types of a valve arrangement
    • The needle valve can be laid out either at the top or at the bottom of the meter. Choose the type that best suits your needs.
  • Measurement and control of water flow also possible
    • Measurement and control of water flow not exceeding 1l/min are also possible.

Kofloc RK1250 Series Applications

  • For integration into your equipment panel
  • For gas devices to be used on the semiconductor manufacturing site
  • For biotechnology industries
  • For vacuum line control

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Standard Specifications

  • Fluids : 
  • * Gases: Air, N2, O2, H2, He, Ar, and CO2 (Calibration by actual gas) For other gases, consultation is necessary regarding whether conversion conditions or calibration by actual gas is to be used.
    * Optional: Scale indicating two types of fluids
  • *Liquids : Standard fluid: Water For other liquids, consultation is necessary regarding whether conversion conditions or calibration by actual liquid is to be used.
  • Flow Range :
  • * Gases: 0.5-5 ML/MIN to 3-30 L/MIN (See the Capacity Table below.) Optional: 0.5-3 ML/MIN
  • *Liquids : 0.5-5 ML/MIN to 0.1-1 L/MIN (See the Capacity Table below.) Optional: 0.5-3 ML/MIN
  • Accuracy :
  • *FS±2% (Measurement point) * Optional: FS±1% (Measurement point)
  • *FS±2% (Measurement point)
  • Proof Pressure :
    *Gases: 1.0 MPa for 100 ML/MIN or less ; 0.7 MPa for 5 L/MIN or less ; 0.5 MPa for 10 L/MIN or more
  • *Liquids : 1.0 MPa for 5 ML/MIN or less ; 0.7 MPa for 150 ML/MIN or less ; 0.5 MPa for 200 ML/MIN or more
    • Available scale : 10:1  *Optional: 20:1
    • Body block and some other components  : * SS: SUS316,  * BS: Brass
    • Tapered tube : *SS & BS: Pyrex®, glass
    • Packing : * SS: FKM,*BS : NBR
    • Float : * SS & BS : Pyrex, SUS316, glass
    • Protective cover : * SS & BS : Acrylic resin
    • (Temperature resistance) : * SS & BS : MAX60°
    • Connection :*SS & BS : Rc1/4(Standard); Rc1/8(Optional)
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