Kofloc RK4400 Series Precision Flow Meter for Pressure Regulator

Kofloc RK4400 Precision Flow Meter for Pressure Regulator has been designed especially for connection to precision pressure regulators and is widely used for cylinder regulators.

Kofloc RK4400 Features

  • The precision needle valve Model 2412 is used for easy, fine adjustment of flow.
  • The flow meter tube made by high-precision molding ensures excellent stability and repeatability even if it is inclined.
  • The material, cleaning method, and assembly are carefully designed for the use of high-purity, high-price standard gases so as to eliminate waste losses, reduce the absorption of constituent gas and minimize the generation of other types of gas from the parts.
  • For cylinder regulators
  • For line regulators

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Standard Specifications

Flow range
Standard 1-10ML/MIN, 5-50ML/MIN
      10-100ML/MIN, 50-500ML/MIN
      0.1-1L/MIN, 0.5-5L/MIN
      1-10L/MIN, 1.5-15L/MIN
Object gas
For other gases, please consult us regarding conversion conditions
or calibration with the actual gas to be used. (Refer to page 56.)
Within FS ±2%
Within ±0.5% of reading
Proof pressure
Temperature resistance
Direct reading or mm scale (Refer to page
Needle valve
Precision needle valve Model 2412
Material of exhaust
gas section
(B) Pyrex, glass, SUS316, Brass, NBR,
acrylic resin, fluorocarbon resin, glass
(SS) Pyrex, glass, SUS316, FKM, fluorocarbon resin, SUS304, glass
End connection
Inlet: PF 1/4 thread
Outlet: Rc 1/4 (φ7 hose nipple) standard accessory


  • Almost all types of general cylinder regulators can be attached.
  • Refer to Model 7700 for a product equipped with a cylinder regulator.
  • Our company will select a needle valve.
  • Be sure to clearly indicate the supply pressure (preset pressure of cylinder regulator).