Kofloc Variable Flow Valve 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.

Kofloc flow controller valve 2204

Features

- 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.

Applications

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

Specification

  • 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 : (code A) Al, brass, POM, NBR, SUS316 or (Code SS) SUS316, fluorocarbon resin, FKM 
  • Connection end : Rc 1/8 (M8 + Rc 1/8)
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