Kofloc Model 2412 Precision Needle Valve w/Non-rotary Needle

Description

The Kofloc Model 2412 Precision Needle Valve represents the pinnacle of manual flow control technology. The core innovation of this valve is its non-rotary needle stem. In conventional needle valves, the needle rotates as it moves into the orifice, which can cause “galling” or mechanical wear on the seat over time. The Model 2412 solves this by allowing the needle to move only in a linear (up and down) direction.

This linear movement ensures that the Kofloc Model 2412 Precision Needle Valve maintains a perfectly consistent flow characteristic even after thousands of adjustments. Furthermore, the absence of rotation prevents the “shift” in flow that often occurs when a rotating needle finally settles into the seat. Whether you are managing delicate gas chromatography flows or high-precision chemical dosing, this valve provides a level of smooth, hysteresis-free control that is unmatched in the industry. Its robust design is available in multiple materials to ensure compatibility with a wide range of corrosive and non-corrosive fluids.

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.

Specification

Model: 2412
Adjustment Type: Precision Needle (Non-rotating stem)
Applicable Fluids: Air, N2, Ar, He, H2, O2, and various liquids.
Flow Ranges: Customizable (e.g., from 1 mL/min to 100 L/min depending on gas/orifice).
Maximum Operating Pressure: 1.0 MPa (Standard).
Operating Temperature: 5°C to 60°C (Standard) / Optional high-temp versions.
Connection Sizes: Rc 1/8, Rc 1/4, or 1/4″ Tube fittings.
Wetted Materials: SUS316, Brass, and Fluorocarbon Rubber (Viton).

Features

Non-rotary needle mechanism prevents seat wear and enhances valve life.
Ultra-fine, linear flow characteristics for superior adjustment precision.
Minimized particle generation, ideal for high-purity gas applications.
Eliminates flow shift and hysteresis during set-point adjustment.
Available in high-grade Stainless Steel (SUS316) or Brass.
Compact and elegant design for high-end panel mounting.

Applications

Analytical Instruments: Managing carrier and fuel gases in laboratory analyzers.
Semiconductor Equipment: Fine-tuning inert gas flows in cleanroom environments.
Environmental Monitoring: Precise sampling of air and water for pollution analysis.
Biotechnology: Controlling gas infusion rates in bioreactors and fermenters.
Vacuum Systems: Managing controlled leaks and bleed rates in vacuum chambers.

Additional Information

Flow rate when the outlet valve is totally opened to release flows into air
Needle #	Supply pressure (MPa)(Air at 20℃)							Supply pressure (MPa)(Water at 20℃)
Needle #	0.05	0.1	0.2	0.3	0.4	0.5	0.6	0.05	0.1	0.15
#SS1	0.023	0.047	0.078	0.11	0.15	0.19	0.22	－	－	－
#S1	0.08	0.11	0.2	0.27	0.34	0.4	0.47	－	－	－
#1	0.15	0.23	0.36	0.51	0.65	0.79	0.93	0.00145	0.0026	0.0036
#2	0.34	0.46	0.71	1.0	1.2	1.5	1.75	0.0076	0.012	0.0153
#2A	0.45	0.65	1.0	1.3	1.65	2.0	2.3	0.0132	0.0195	0.0245
#3	0.9	1.3	2.0	2.6	3.25	3.9	4.6	0.0260	0.0390	0.0510
#3A	1.25	1.9	2.75	3.65	4.5	5.3	6.4	0.0365	0.0546	0.0740
#3B	1.85	2.5	3.7	5.0	6.0	7.2	8.3	0.053	0.0760	0.0980
#4	4.3	6.2	9.0	12.0	15.0	18.3	22.0	0.124	0.188	0.234
#4A	8.0	11.0	15.0	21.0	26.0	31.0	36.0	0.228	0.336	0.417
#5	10.0	14.0	21.0	27.0	33.0	40.0	46.0	0.294	0.435	0.576
#6	22.0	31.0	45.0	60.0	75.0	92.0	105.0	0.564	0.834	1.100
#6A	30.0	41.0	60.0	80.0	100	118	138	0.774	1.190	－
#6B	38.0	53.0	82.0	106	135	160	185	1.280	1.950	－
#7	80.0	110	160	215	260	285	310	1.840	2.890	－
* Due to operating conditions and instrumental errors, there may be differences between the values indicated										(L/MIN）
in the table above and those that are　actually used by the customer.
* The values shown in the table above are data for Model 2412L for illustrative purposes only. As compared with the 2412L, flows on the 2412T will
run less smooth when the flow rate increases. It is therefore recommended that the 2412L be used for flows of 5 L/MIN or more.