Facebook-f Instagram Linkedin
Menu
Menu
Model RK1250 Series flow meters and controllers for liquid

Kofloc Model RK1250 Flow Meters and Controllers for Liquid

The Kofloc Model RK1250 Flow Meter and Controller for Liquid is a completely refined precision instrument built for high-level equipment integration. It combines a high-precision float-type meter with a sophisticated needle valve for surgical control of trace liquid flows. While often used for gases, the RK1250 is uniquely optimized for water (H_2O) and other liquids, offering a sleek, modern design that fits perfectly into analytical instrument panels.

Get a Quote!

Description

As a successor to the RK1200, the Kofloc Model RK1250 offers improved visibility and a more modular design. For liquid applications, it specializes in handling “trace flows”—from ultra-minute 0.5 mL/min up to 1 L/min.

The core of the RK1250 is its non-rotating precision needle valve. Unlike standard valves that rotate against the seat (causing wear and drift), the RK1250 needle moves purely in a linear motion. This preserves the seat’s integrity and allows for highly repeatable, delicate adjustments. The block is typically made of SUS316 Stainless Steel for liquid use to ensure zero corrosion, and the glass tube is protected by a transparent acrylic cover for operator safety.

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

  • Renewed Design: Modernized version of the RK1200, offering better readability and panel aesthetics.
  • Precision Needle Valve: Features a delicate, high-resolution control mechanism for minute liquid dosing. 
  • Flexible Valve Placement: The needle valve can be positioned at the Top (U) or Bottom (D) of the meter to suit your piping layout.
  • Multiple Length Options: Available in four total lengths (126, 156, 206, and 256 mm) to match various panel heights.
  • High-Grade Materials: SUS316 body and Pyrex glass as standard for liquid compatibility.
  • Panel Mount Ready: Includes mounting nuts as standard for seamless flush-mount or surface-mount installation.

Applications

The Kofloc Model RK1250 for Liquid is highly effective for:

  • Biotechnology: Precise nutrient dosing in laboratory bioreactors.
  • Semiconductor Manufacturing: Control of ultra-pure water (UPW) in trace cleaning processes.
  • Analytical Equipment: Sample liquid delivery for chemical analyzers.
  • Purge Systems: Maintaining a constant, low-volume liquid purge for sensors.
  • Vacuum Line Control: Managing liquid ballast or coolant in vacuum systems.

Specification

FeatureSpecification
Measurement PrincipleVariable Area (Tapered Glass Tube)
Applicable LiquidsWater ($H_2O$) – Standard; others upon consultation
Flow Ranges (Liquid)0.5–5 mL/min up to 0.1–1 L/min
AccuracyWithin $pm$2% Full Scale
Max Pressure1.0 MPa (for $leq$ 5 mL/min); 0.5 MPa (for $geq$ 200 mL/min)
Operating TempMax 60°C
Wetted MaterialsSUS316, Pyrex Glass, FKM (Fluororubber)
Connection SizeRc 1/4 (Standard); Rc 1/8 (Optional)

 

Additional Information

Capacity Table

Air (Flow rate at atmospheric pressure)
Max. flow rate510203050100150200300500123510152030
Total lengthML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINL/MINL/MINL/MINL/MINL/MINL/MINL/MINL/MIN
126mm○○○○○○○○○○○○○○○○○○
156mm－○○○○○○○○○○○○○○○○○
206mm－－－－○○○○○○○○○○○○○○
256mm－－－－－○○○○○○○○○○○○○
H2O
Max. flow rate5102030501001502003005001
Total lengthML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINML/MINL/MIN
126mm○○○○○○○○○○○
156mm○○○○○○○○○○○
206mm○○○○○○○○○○○
256mm○○○○○○○○○○○

Related products