Kofloc Control Valve 2600S 2600PVC Series

Constant Flow Valve for Liquid

This is a constant flow valve developed for liquids, and maintains a constant liquid flow irrespective of pressure changes on the primary and secondary sides.

Kofloc Control Valve 2600S and 2600PVC


  • Excellent constant flow valve for liquids
The valve is made of high-precision parts for smooth control.
  • Immune to pressure changes
The valve keeps the flow constant irrespective of changes in the primary- and secondary-side (outlet-side) pressure.
  • Control of very small flow from 10 ml/min
  • Upper and lower diaphragm chambers equipped with airbreathers
Air breathing during initial flow setting permits high accuracy control.


  • Analyzers
  • Environmental measuring instruments
  • Liquid mixing equipment


  • Fluid: H2O
  • Flow rating (at H2O calibration condition)
1-10 ML/MIN
10-100 ML/MIN
0.1-1 L/MIN
  • Control accuracy *1 : ±3% F.S.
  • Operating differential pressure : 0.1 MPa or more 
  • Operating pressure : 0.1-0.5 Mpa 
  • Proof pressure : 0.7 Mpa 
  • Materials of parts in contact with fluids
Model 2600-S : SUS 316, Viton, fluorocarbon resin
     PVC : PVC, SUS 316, NBR, Viton
  • Operating temperature : 15-35℃
  • End connection: Rc 1/4
Note *1: The control accuracy is guaranteed only when the fluid temperature is constant,
because the viscosity varies with temperature.