Top Page > Product Information > Variable Flow Meter(Rotameter) > High-Grade Flow Meter with Precision Needle ValveMODEL RK1200 SERIES
Variable Flow Meter(Rotameter)
- High-Grade Flow Meter with Precision Needle Valve
MODEL RK1200 SERIES - The high-grade rotameter products for accurate flow control
The KOFLOC High-Grade Flow Meter with Precision Needle Valve MODEL RK1200 SERIES is a high-end variable area flow meter, combined with a precision needle valve, with focus on accuracy, ease-of-use and versatility. 
KOFLOC High-Grade Variable Area Flow Meter with Precision Needle Valve MODEL RK1200 SERIES
Quick Review
•The time-tested model
KOFLOC High-Grade Variable Area Flow Meter with Precision Needle Valve MODEL RK1200 SERIES was the KOFLOC's standard rotameter model, before RK1250's introduction. It is coupled with the MODEL 2412 SERIES precision needle valve for fine control of minute flow.
• KOFLOC RK1250 SERIES High Precision Variable Area Flowmeter
KOFLOC RK1250 SERIES High Precision Variable Area Flow Meter is a high-grade rotameter especially suited for measurement and control of minute flow, with an industry reputation of being one of the best analog devices. The new redesigned MODEL RK1250 SERIES retains all the advantages of RK1200 with an all new design package.
• KOFLOC 2412 SERIES Precision Needle Valve
KOFLOC 2412 SERIES Non-Rotating Precision Needle valve allows precise and easy flow control of minute amounts of gases and liquids. The internal mechanism converts rotating movement into stable linear movements with minimal vibrations. The needle and orifice has a thermal compensating structure (US P.A.F.) of 0.3%/˚C (15˚C to 35˚C).
• Top/Bottom valve position
KOFLOC High-Grade Variable Area Flow Meter with Precision Needle Valve MODEL RK1200 SERIES comes with either the top (outlet) valve or the bottom (inlet) valve. There are many issues to consider in choosing the right valve position. Contact Kofloc for more information.
• 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.
• Wide flow range coverage
KOFLOC High-Grade Variable Area Flow Meter with Precision Needle Valve MODEL RK1200 SERIES comes in 4 sizes of 120, 150, 200 and 250 mm that cover small flow ranges from 0.5 ml/min to 3 l/min to medium range of 10 ml/min to 100 l/min.
• Steel/Brass fittings
The fittings are available in either SUS316 stainless steel or brass with respective O-rings of Viton® for SUS316 and NBR for brass fittings.
•Tri-flat & rib-guide flow-tubes
KOFLOC leads the industry in tri-flat flow-tube (for flows between 5 ml/min to 500 ml/min) production with superior precision. The rib-guide flow-tubes are used for medium range flows between 1 l/min and 50 l/min.
KOFLOC High-Grade Variable Area Flow Meter with Precision Needle Valve MODEL RK1200 SERIES can only be used for the following gases.
Medium (gases): Actual gas calibration is available for the gas listed
Air, Argon: Ar, Carbon dioxide: CO2, Helium: He, Hydrogen: H2, Nitrogen: N2, Oxygen: O2
N2 equivalent conversion factor (CF) is used for other gases. Contact KOFLOC for the availability of actual gas calibration.
Customization and Optional services
• Optional flow-tubes with ±1% accuracy
• H2O version (for water flows below 2 L/Min) is also available.
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•The time-tested model
KOFLOC High-Grade Variable Area Flow Meter with Precision Needle Valve MODEL RK1200 SERIES was the KOFLOC's standard rotameter model, before RK1250's introduction. It is coupled with the MODEL 2412 SERIES precision needle valve for fine control of minute flow.
• KOFLOC RK1250 SERIES High Precision Variable Area Flowmeter
KOFLOC RK1250 SERIES High Precision Variable Area Flow Meter is a high-grade rotameter especially suited for measurement and control of minute flow, with an industry reputation of being one of the best analog devices. The new redesigned MODEL RK1250 SERIES retains all the advantages of RK1200 with an all new design package.
• KOFLOC 2412 SERIES Precision Needle Valve
KOFLOC 2412 SERIES Non-Rotating Precision Needle valve allows precise and easy flow control of minute amounts of gases and liquids. The internal mechanism converts rotating movement into stable linear movements with minimal vibrations. The needle and orifice has a thermal compensating structure (US P.A.F.) of 0.3%/˚C (15˚C to 35˚C).
• Top/Bottom valve position
KOFLOC High-Grade Variable Area Flow Meter with Precision Needle Valve MODEL RK1200 SERIES comes with either the top (outlet) valve or the bottom (inlet) valve. There are many issues to consider in choosing the right valve position. Contact Kofloc for more information.
• 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.
• Wide flow range coverage
KOFLOC High-Grade Variable Area Flow Meter with Precision Needle Valve MODEL RK1200 SERIES comes in 4 sizes of 120, 150, 200 and 250 mm that cover small flow ranges from 0.5 ml/min to 3 l/min to medium range of 10 ml/min to 100 l/min.
• Steel/Brass fittings
The fittings are available in either SUS316 stainless steel or brass with respective O-rings of Viton® for SUS316 and NBR for brass fittings.
•Tri-flat & rib-guide flow-tubes
KOFLOC leads the industry in tri-flat flow-tube (for flows between 5 ml/min to 500 ml/min) production with superior precision. The rib-guide flow-tubes are used for medium range flows between 1 l/min and 50 l/min.
KOFLOC High-Grade Variable Area Flow Meter with Precision Needle Valve MODEL RK1200 SERIES can only be used for the following gases.
Medium (gases): Actual gas calibration is available for the gas listed
Air, Argon: Ar, Carbon dioxide: CO2, Helium: He, Hydrogen: H2, Nitrogen: N2, Oxygen: O2
N2 equivalent conversion factor (CF) is used for other gases. Contact KOFLOC for the availability of actual gas calibration.
Customization and Optional services
• Optional flow-tubes with ±1% accuracy
• H2O version (for water flows below 2 L/Min) is also available.
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Features
♦ Wide-range flow measurement
♦ Fine control of minute flow
♦ Precision needle valve
♦ Numerous variants and custom models
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♦ Fine control of minute flow
♦ Precision needle valve
♦ Numerous variants and custom models
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Applications
♦ Research & Analytical use
♦ Use with gas equipment in semiconductor industry
♦ Bio-Industry
♦ Vacuum line control
♦ General industrial applications
♦ Pre-processing stage
♦ Collector and sampler
♦ Electric furnace
♦ CCFL
♦ Washer and dryer
♦ Flow control
♦ Asbestos collector
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♦ Use with gas equipment in semiconductor industry
♦ Bio-Industry
♦ Vacuum line control
♦ General industrial applications
♦ Pre-processing stage
♦ Collector and sampler
♦ Electric furnace
♦ CCFL
♦ Washer and dryer
♦ Flow control
♦ Asbestos collector
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Standard Specifications
| Gases | Liquids | |
|---|---|---|
| Fluids | Air,N2,O2,H2,He,Ar,and CO2 (Calibration by actual gas) For other gases,consultation is necessary regarding whether conversion conditions or calibration by actual gas is to be used. *Optional:Scale indicating two types of fluids | Standard fluid:Water For other liquids,consultation is necessary regarding whether conversion conditions or calibration by actual liquid is to be used. |
| Flow range | 0.5-5ml/min to 10-100l/min (See the Capacity Table below.)*Optional:0.5-3ml/min | 0.5-5ml/min to 0.2-2l/min (See the Capacity Table below.)*Optional:0.5-3ml/min |
| Accuracy | FS±2%(Measurement point) *Optional:FS±1%(Measurement point) | FS±2%(Measurement point) |
| Proof pressure | 1.0MPa for 100ml/min or less 0.7MPa for 5 l/min or less 0.5MPa for 10 l/min or more | 1.0MPa for 5ml/min or less 1.0MPa for 100 ml/min or less 0.5MPa for 300 ml/min or more |
| Available scale | 10:1 *Optional:20:1 | |
| - | ||
| Materials | SS | BS |
| Body block | SUS316 | Brass |
| Tapered tube | Pyrex | |
| Packing | Viton | NBR |
| Float | Pyrex,SUS316,SUS304 | |
| Protective cover | Acrylic resin | |
| Heat resistance | 120°C | 70°C |
| Connection end | Rc1/4(Standard);Rc1/8(Optional) | |
Capacity Table
| Air(Flow rate at atmospheric pressure) ML/MIN,L/MIN | |||||||||
| mm | 5ML | 10ML | 20ML | 30ML | 50ML | 100ML | 150ML | 200ML | 300ML |
|---|---|---|---|---|---|---|---|---|---|
| 120 | O | O | O | O | O | O | O | O | O |
| 150 | - | O | O | O | O | O | O | O | O |
| 200 | - | - | - | - | O | O | O | O | O |
| 250 | - | - | - | - | - | O | O | O | O |
| mm | 500ML | 1L | 2L | 3L | 5L | 10L | 15L | 20L | 30L |
| 120 | O | O | O | O | O | O | O | O | O |
| 150 | O | O | O | O | O | O | O | O | O |
| 200 | O | O | O | O | O | O | O | O | O |
| 250 | O | O | O | O | O | O | O | O | O |
| mm | 50L | 100L | |||||||
| 120 | O | - | |||||||
| 150 | O | O | |||||||
| 200 | O | - | |||||||
| 250 | O | - | |||||||
| H2O ML/MIN,L/MIN | |||||||||
| mm | 5ML | 10ML | 20ML | 30ML | 50ML | 100ML | 150ML | 200ML | 300ML |
| 120 | O | O | O | O | O | O | O | O | O |
| 150 | O | O | O | O | O | O | O | O | O |
| 200 | O | O | O | O | O | O | O | O | O |
| 250 | O | O | O | O | O | O | O | O | O |
| mm | 500ML | 1L | 2L | ||||||
| 120 | O | O | - | ||||||
| 150 | O | O | O | ||||||
| 200 | O | O | O | ||||||
| 250 | O | O | - | ||||||
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