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Kofloc, RK1200 Series-Flowmeter Type

Kofloc RK1200 Flowmeter

The Kofloc Model RK1200 Flowmeter is a grade-high precision float-type flowmeter combined with an integrated needle valve. Specifically designed for the measurement and control of ultra-minute flows, it provides a superior level of accuracy and repeatability that makes it the preferred choice for semiconductor manufacturing, biotechnology research, and vacuum line monitoring.

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Description

The RK1200 Series stands apart due to its non-rotating precision needle valve structure. In typical flowmeters, the needle rotates as it moves into the seat, which can cause mechanical wear and “drift” in the flow setting. The RK1200’s needle moves purely in a linear fashion, preserving the integrity of the valve seat and allowing for surgical-grade flow adjustments.

This model features a precision-tapered Pyrex glass tube and is housed in a robust block (available in SUS316 or Brass). Its “closed-loop” manual control allows users to set a flow rate and trust that it will remain stable. It is highly versatile, offering options for the valve to be located at either the top (ideal for vacuum applications) or the bottom (standard pressure) of the meter.

Brand

Kofloc

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

  • Ultra-Minute Flow Control: Capable of managing flows as low as 0.5 mL/min with high resolution.
  • Superior Accuracy: Precision calibrated to within $pm$2% Full Scale (with an option for pm1 F.S.).
  • Non-Rotating Needle Valve: Eliminates valve seat wear and provides superior repeatability.
  • High Chemical Compatibility: Standard SUS316 body blocks ensure durability with high-purity and corrosive gases.
  • Flexible Mounting: Available in multiple total lengths (standard 150mm) to fit various panel dimensions.
  • Vacuum Compatibility: Specialized versions available for stable control in vacuum environments.

Specification

FeatureSpecification
Measurement PrincipleVariable Area (Tapered Glass Tube)
Accuracy$pm$2.0% Full Scale (Standard); $pm$1.0% (Optional)
Gas Flow Ranges0.5–5 mL/min up to 10–100 L/min
Liquid Flow Ranges0.5–5 mL/min up to 0.2–2 L/min (Water)
Max Operating Pressure1.0 MPa (for ranges $leq$ 100 mL/min)
Max Temperature60°C
Wetted MaterialsSUS316 or Brass, Pyrex Glass, FKM/NBR
Connection SizeRc 1/4 (Standard); Rc 1/8 (Optional)

 

Applications

The Kofloc Model RK1200 is a staple in:

  • Semiconductor Industry: Managing high-purity purge gases and process chemicals.
  • Environmental Analysis: Precision regulation of sample gases for air quality monitors.
  • Biotechnology: Controlling exact $O_2$ and $CO_2$ ratios in fermentation processes.
  • Vacuum Equipment: Stable gas ballast control for vacuum pump lines.
  • Gas Chromatography: Reliable carrier gas delivery for laboratory analysis

Additional Information

Air (Flow rate at atmospheric pressure)
Max. flow rate51020305010015020030050012351015203050100
Total lengthML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINL/MINL/MINL/MINL/MINL/MINL/MINL/MINL/MINL/MINL/MIN
120mm○○○○○○○○○○○○○○○○○○○－
150mm－○○○○○○○○○○○○○○○○○○○
200mm－－－－○○○○○○○○○○○○○○○－
250mm－－－－－○○○○○○○○○○○○○○－
H2O
Max. flow rate51020305010015020030050012
Total lengthML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINL/MINL/MIN
120mm○○○○○○○○○○○－
150mm○○○○○○○○○○○○
200mm○○○○○○○○○○○○
250mm○○○○○○○○○○○－

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