Kofloc Model RK4400 Precision Flow Meter for Pressure Regulator

Description

The RK4400 Series is the professional choice for laboratories and industrial sites that use gas cylinders. While most flow meters require separate piping and mounting, the RK4400 attaches directly to the regulator body (typically via a PF 1/4 or standard thread).

A key advantage of this model is its construction. Kofloc utilizes specialized cleaning and assembly methods to ensure the meter is compatible with high-purity, high-price standard gases. The internal design minimizes the “absorption” of constituent gases and prevents outgassing from the parts, preserving the integrity of your gas mixture. Additionally, the high-precision molding of the tapered tube ensures that the float remains stable and the reading stays accurate even if the cylinder setup is slightly inclined.

Brand

Kofloc

The natural environment is preserved through the balance of solids, liquids and gases that exist on the earth. However, human civilization has caused pollution that has greatly damaged our environment. The task of the present generation is to restore our environment to its natural healthy state. And this is also the greatest challenge for 21st century science and technology.

KOFLOC's corporate motto is "A Scientific Approach for Fluids." In other words, we create products that scientifically measure and control the balance of liquids and gases. We trust that through our work we are making a contribution to the regeneration of the environment and to the establishment of a prosperous society.

Features

Cylinder Regulator Optimized: Designed specifically for mounting on various types of general cylinder and line regulators.
Model 2412 Precision Valve: Equipped with a non-rotating needle valve for ultra-fine, “jump-free” flow adjustment.
High-Purity Integrity: Carefully selected materials and cleaning processes prevent gas contamination and loss.
Excellent Stability: Precision-molded tubes ensure repeatable readings and float stability.
Corrosion Resistant: Available in SUS316 Stainless Steel or Brass to suit different gas types.
Standard Connection: Features a PF 1/4 inlet for direct regulator mounting and an Rc 1/4 outlet with a hose nipple.

Specification

Feature	Specification
Measurement Principle	Variable Area (Precision Molded Tube)
Accuracy	Within $pm$ 2.0% Full Scale
Repeatability	Within $pm$ 0.5% of reading
Standard Gas Ranges	10 mL/min to 20 L/min (N₂ equivalent)
Applicable Gases Air, $N_2$ , $O_2$ , $H_2$ , $He$ , $Ar$ , $CO_2$ , etc.
Max Pressure	0.3 MPa (Working Pressure)
Max Temperature	40°C
Wetted Materials	SUS316 or Brass, Pyrex Glass, FKM/NBR, Fluororesin
Inlet Connection	PF 1/4 (Cylinder Mount)

Applications

The Kofloc Model RK4400 is the essential interface for:

Gas Chromatography: Regulating carrier gas flows directly from the cylinder.
Standard Gas Calibration: Delivering precise amounts of reference gas for analyzer calibration.
Pilot Plants: Controlling process gas feeds in small-scale chemical research.
Medical Laboratories: Managing specialty gas mixtures for sensitive research environments.
Semiconductor Purging: Providing stable, high-purity Nitrogen or Argon flows for equipment maintenance.

Additional Information

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).