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Flow Control Valves
- Precision Needle Valve /Non-rotary Needle
MODEL 2412 SERIES - The precision needle valve products
The KOFLOC Precision Needle Valve MODEL 2412 SERIES is a precision needle valve with non-rotating needle designed for accurate control of minute flow, with focus on accuracy, wider operating temperature range and product variety.
KOFLOC MODEL 2412 SERIES Precision Needle Valve
Quick Review
• Precision Control
The KOFLOC Precision Needle Valve MODEL 2412 SERIES is designed to control minute flows with precision and ease. It has been widely used in numerous applications from general industrial applications to analytical equipment such as AAS (Atomic absorption spectrometer).
• Minute Flow Capability
The KOFLOC Precision Needle Valve MODEL 2412 SERIES can control minute flow stably and accurately, as low as 0.5 ML/MIN.
• KOFLOC Dependability
KOFLOC has 60 years of experience in manufacturing precision flow instruments. KOFLOC products, both standard and off-catalog custom items are well received throughout Japan as the name that manifests confidence. KOFLOC, the fluid expert, is the name professionals trust in precision control of minute flow.
• Numerous Variants
The KOFLOC Precision Needle Valve MODEL 2412 SERIES includes 15 different needle valves to offer optimum flow control corresponding to various flow levels.
• Non-Rotating Needle
The design of the KOFLOC Precision Needle Valve MODEL 2412 SERIES transforms the rotation of the regulating screw to into linear motion of the needle without subjecting it to gaps and vibrations produced by the screw, to ensure stable and even control of minute flow.
• Wide operating temperature range
The needle orifice of the KOFLOC Precision Needle Valve MODEL 2412 SERIES has a temperature compensating structure (US P.A.F.) achieving the characteristic of 0.3%/˚C for gas temperatures between 15 ˚C to 35˚C.
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• Precision Control
The KOFLOC Precision Needle Valve MODEL 2412 SERIES is designed to control minute flows with precision and ease. It has been widely used in numerous applications from general industrial applications to analytical equipment such as AAS (Atomic absorption spectrometer).
• Minute Flow Capability
The KOFLOC Precision Needle Valve MODEL 2412 SERIES can control minute flow stably and accurately, as low as 0.5 ML/MIN.
• KOFLOC Dependability
KOFLOC has 60 years of experience in manufacturing precision flow instruments. KOFLOC products, both standard and off-catalog custom items are well received throughout Japan as the name that manifests confidence. KOFLOC, the fluid expert, is the name professionals trust in precision control of minute flow.
• Numerous Variants
The KOFLOC Precision Needle Valve MODEL 2412 SERIES includes 15 different needle valves to offer optimum flow control corresponding to various flow levels.
• Non-Rotating Needle
The design of the KOFLOC Precision Needle Valve MODEL 2412 SERIES transforms the rotation of the regulating screw to into linear motion of the needle without subjecting it to gaps and vibrations produced by the screw, to ensure stable and even control of minute flow.
• Wide operating temperature range
The needle orifice of the KOFLOC Precision Needle Valve MODEL 2412 SERIES has a temperature compensating structure (US P.A.F.) achieving the characteristic of 0.3%/˚C for gas temperatures between 15 ˚C to 35˚C.
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Features
♦ Accurate control of minute flow
♦ Wide needle variation
♦ Non-rotating needle
♦ Wide operating temperature range
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♦ Wide needle variation
♦ Non-rotating needle
♦ Wide operating temperature range
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Applications
♦ Precision flow control
♦ Atomic absorption spectrometer
♦ Burn control
♦ Research and development
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♦ Atomic absorption spectrometer
♦ Burn control
♦ Research and development
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Standard Specifications
| Rated flow ranges | See Table of Rated Flow Ranges below. |
|---|---|
| Rotating speed | Approx. 12 turns |
| Max. operating pressure | 1.0MPa |
| Max. operating temperature | (B) 70°C (SS)120°C |
| Materials of parts exposed to fluids | B:Brass,Duracon,NBR SS:SUS316,Teflon,Viton |
| Fluids | Gasses and liquids |
| Connection opening | Rc1/4(Standard) |
Flow rate when the outlet valve is totally opened to release flows into air
| Needle # | Supply pressure(MPa) (AIR at 20°C) | Supply pressure(MPa)(Water at 20°C) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 0.026 | 0.039 | 0.051 |
| #3A | 1.25 | 1.9 | 2.75 | 3.65 | 4.5 | 5.3 | 6.4 | 0.0365 | 0.0546 | 0.074 |
| #3B | 1.85 | 2.5 | 3.7 | 5.0 | 6.0 | 7.2 | 8.3 | 0.053 | 0.076 | 0.098 |
| #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 | 0.564 | 0.834 | 1.1 |
| #6A | 30.0 | 41.0 | 60.0 | 80.0 | 100 | 118 | 138 | 0.774 | 1.19 | - |
| #6B | 38.0 | 53.0 | 82.0 | 160 | 135 | 160 | 185 | 1.28 | 1.95 | - |
| #7 | 80.0 | 110 | 160 | 215 | 260 | 285 | 310 | 1.84 | 2.89 | - |
♦Due to operating conditions and instrumental errors, there may be differences between the values indicated 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 5l/min or more.
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♦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 5l/min or more.
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CV Values
| Needle # | Max. CV value |
|---|---|
| #SS1 | 0.00012 |
| #S1 | 0.00028 |
| #1 | 0.00058 |
| #2 | 0.0012 |
| #2A | 0.0016 |
| #3 | 0.0033 |
| #3A | 0.0048 |
| #3B | 0.0063 |
| #4 | 0.016 |
| #4A | 0.028 |
| #5 | 0.035 |
| #6 | 0.078 |
| #6A | 0.10 |
| #6B | 0.13 |
| #7 | 0.28 |
Notes
♦For large flows, please refer to Model 2412D(page 58).
♦We can suggest you the needle most suitable for your equipment if the pressure, fluid, flow rate and other operating conditions of your equipment are known. Please use the above table for reference only.
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♦We can suggest you the needle most suitable for your equipment if the pressure, fluid, flow rate and other operating conditions of your equipment are known. Please use the above table for reference only.
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Optional Specifications
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