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

This needle valve has been designed to control minute gas and liquid flows with precision and ease.

Description

This needle valve has been designed to control minute gas and liquid flows with precision and ease. Design allows the rotation of the regulating screw to transform into linear motion of the needle without subjecting the needle to gaps and/or vibrations produced by the screw, so smooth, stable flows can be ensured.

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

  • Capable of controlling ultra-minute flows
    Very accurate, stable control of ultra-minute flows up to 1 ml/min possible
  • Wide variations of needle type
    15 types of needles are available for your choice of the type that best suits your needs.
  • Needle of non-rotary structure
    Because this valve is constructed so that the rotation of the regulating screw is transformed into linear motion of the needle, the valve has a longer life in addition to superior control performance.
  • Superior temperature characteristic (15-35°C)
    The valve counts on an outstanding temperature characteristic (flow fluctuations remain within an insignificant range of 0.3%/°C to ambient temperature variations) thanks to the temperature compensation system incorporated in the valve’s needle and orifice. This temperature compensation system is a utility model of KOFLOC registered at the United States Patent and Trademark Office. (Optional specification for needles #SS1 to #3B-BS)
    This temperature compensation system is applicable to gases only, and not to liquids, because the viscosity of a liquid may fluctuate depending upon the temperature conditions.

Applications

  • For accurate control of minute flows of gases and liquids

Specification

Rated flow ranges See the table below
Number of turns of regulating screw Approx. 12 turns
Maximum operating pressure 1.0 MPa
Maximum operating temperature (B) 70℃
(SS) 120℃
Materials of parts in contact with fluids (B) Brass, POM, NBR
(SS) SUS316, fluorocarbon resin, FKM
Fluids Gas and liquid
Connection end Rc 1/4 (standard)

Optional Specifications

  • Connection opening
    • Materials not included in the standard specifications

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℃)
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.