Kaifeng Instrument LL series Roots flow meter is a kind of positive displacement flow meter, it is designed with concise structure, is accurate and reliable in use, has no special requirement for the fluid field in the pipeline, and is applicable for …
Kaifeng Instrument LL series Roots flow meter is a kind of positive displacement flow meter, it is designed with concise structure, is accurate and reliable in use, has no special requirement for the fluid field in the pipeline, and is applicable for medium with a wide range of viscosity, working with a wide flow range. It is widely used in the measurement of liquids in industries of petroleum, chemistry, pharmacy, transportation, food, etc..
The cycloidal suface of rotors are independly designed by our R&D team, it ensures the meter works smoothly with high accuracy. During working, the rotors don't contact with eath other, which ensures a good repeatability and reliablility of the meter.
l High accuracy, accurate up to 0.1%
l Pistons rotating without contact, good repeatability.
l Low vibration and noise.
l Do not need straight pipe sections at up or down streams, easy to install .
l On-site display，and optional for the photoelectric pulse transmitter or the intelligent gauge outfit to output the pulse and current signals.
Optional accessories
l Air eliminator
l Strainer
l Integrated air eliminator and strainer
Nominal Diameter: | DN15 ~ DN500mm | |
Nominal Pressure: | PN1.6 ~ 6.3MPa | |
Medium: | Petroleum, Petroleum products, Chemical medium etc. | |
Medium Temperature: | -20℃～250℃ | |
Ambient Temperature: | -20℃～55℃ | |
| Body Material: | Cast Iron/ Cast steel/ SS304/ SS316 | |
| Accuracy: | ±0.1%, ±0.2%, ±0.5% | |
Viscosity: | 0.6～500mPa.s | |
Flow Range: | 0.2～3000m3/h | |
| Power Supply: | 24V.DC (two-wire system/three-wire system) | |
| On-site Indication: | Mechanical dial (mechanical counter)/ | |
| Ex-protection: | ExdⅡBT4 | |
| Housing protection: | IP65 | |
Performance Parameters
Application type | Roots Flow Meter (Basic type) | ||||
Accuracy | ±0.5% | ±0.2%,±0.1% | |||
Viscosity(mPa.s) | >4~150 | >150 ~ 500 | >4~150 | >150 ~ 500 | |
Nominal Bore（mm） | Flow Range m3/h | ||||
15 | 0.25~2.5 | 0.2~2.2 | 0.5~2.5 | 0.2~2.0 | |
25 | 0.6~6 | 0.4~5 | 1.2~6 | 0.5~5 | |
40 | 1.6~16 | 1.2~14 | 3.2~16 | 1.4~14 | |
50 | 2.5~25 | 2~22 | 5~25 | 2.2~22 | |
80 | 6~60 | 4~50 | 12~60 | 5~50 | |
100 | 10~100 | 7.5~85 | 20~100 | 8.5~85 | |
150 | 25~250 | 20~220 | 50~250 | 22~220 | |
200 | 30~300 | 22~260 | 60~300 | 26~260 | |
250 | 60~600 | 40~500 | 120~600 | 50~500 | |
300 | 100~1000 | 75~850 | 200~1000 | 85~850 | |
400 | 200~2000 | 160~1800 | 400~2000 | 180~1800 | |
500 | 300~3000 | 210~2500 | 600~3000 | 250~2500 | |
Type | Roots Flow Meter( Low viscosity) | |||||
Accuracy | ± 0.5% | ± 0.2% | ||||
Viscosity (mPa·s) | ≤0.1~0.5 | >0.5~2 | >2~6 | ≤0.1~0.5 | >0.5~2 | >2~6 |
Nominal Bore (mm) | Flow Range (m3/h) | |||||
40 | 5.3~16 | 4~16 | 3.2~16 | 6.4~16 | 5.5~16 | 4~16 |
50 | 8.3~25 | 6.3~25 | 5~25 | 10~25 | 8.5~25 | 6.3~25 |
80 | 20~60 | 15~60 | 12~60 | 24~60 | 20~60 | 15~60 |
80 (II) | 15~40 | 13~40 | 12~40 | 16~40 | 13.3~40 | 10~40 |
100 | 34~100 | 25~100 | 20~100 | 40~100 | 35~100 | 25~100 |
150 | 83~250 | 63~250 | 50~250 | 100~250 | 80~250 | 63~250 |
200 | 100~300 | 75~300 | 60~300 | 120~300 | 100~300 | 75~300 |
>national defense
>chemical
>petroleum
>metallurgy
>energy
>medicine
>light industry
>food
>Water treatment
>Traffic detection
>process control industries
