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Thermal oil flow meter, also known as turbine flow meter, is a turbine flow meter that has been optimized and designed based on domestic and foreign flow meter technology. It has the characteristics of simple structure, lightweight, high accuracy, good reproducibility, sensitive response, and easy installation, maintenance, and use. It is widely used to measure liquids in closed pipelines that do not corrode stainless steel 1Cr18Ni9Ti, 2Cr13, corundum Al2O3, and hard alloys, and have no impurities such as fibers or particles. The flow meter can be used for liquids with a kinematic viscosity of less than 5 × 10-6m ²/s at working temperature. For liquids with a kinematic viscosity greater than 5 × 10-6m ²/s, the flow meter can be calibrated for real liquid before use. If paired with display instruments with special functions, it can also perform quantitative control, over limit alarm, etc., making it an ideal instrument for flow measurement and energy conservation.
Product Features
High precision, generally up to ± 1% R, ± 0.5% R, and high-precision models up to ± 0.2% R;
Good repeatability, short-term repeatability can reach 0.05% to 0.2%. It is precisely because of its good repeatability that high accuracy can be obtained through regular calibration or online calibration, that flow meters are preferred for trade settlement;
Output pulse frequency signal, suitable for total measurement and computer connection, no zero drift, strong anti-interference ability;
High frequency signals (3-4 kHz) can be obtained, with strong signal resolution;
Range measurement, with a medium to large caliber of up to 1:20 and a small caliber of 1:10;
Compact and lightweight structure, easy installation and maintenance, and high circulation capacity;
Suitable for high voltage measurement, there is no need to open holes on the instrument body, making it easy to make high voltage instruments;
There are various types of specialized sensors that can be designed according to the specific needs of users, such as low-temperature, bidirectional, downhole, sand mixing, etc;
Can be made into an insertion type, suitable for measuring large diameters, with low pressure loss, low price, can be removed without interruption, and easy installation and maintenance.
1. Accuracy can generally reach ± 1% R, ± 0.5% R, and high-precision models can reach ± 0.2% R;
2. Output pulse frequency signal, suitable for total measurement and computer connection, no zero drift, strong anti-interference ability;
3. Can obtain high frequency signals (3-4kHz) with strong signal resolution;
4. Wide range, with a medium to large caliber of up to 1:20 and a small caliber of 1:10;
5. Compact and lightweight structure, easy installation and maintenance, and high circulation capacity;
6. Suitable for high voltage measurement, there is no need to open holes on the instrument body, making it easy to make high voltage instruments;
7. Can be made into an insertion type, suitable for measuring large diameters, with low pressure loss, low price, can be removed without interruption, and easy installation and maintenance.
8. Good repeatability, short-term repeatability can reach 0.05%~0.2%. It is precisely because of its good repeatability that frequent calibration or online calibration can achieve extremely high * * degrees, making it a preferred flowmeter for various manufacturers
3、 Technical performance: Table 1
III. Technical performance: Table 1
| Instrument caliber and connection | 4、6、10、15、20、25、32、40Threaded connection |
| （15、20、25、32、40）50、65、80、100、125、150、200With flange connection | |
| Accuracy Class | ±0.5%R |
| range ratio | 1:10；1:15；1:20 |
| Instrument Material | 304 stainless steel, 316(L) stainless steel, etc. |
| Temperature of measured medium (℃) | -20～＋120℃ |
| environmental conditions | Temperature -10～+55℃, relative humidity 5%～90%, atmospheric pressure 86～106Kpa |
| output signal | 4-20mADC current signal (LWGY-□C type) |
| Power supply | LWGY-□B type: self-powered by lithium battery (can be used continuously for 3 years); LWGY-□C type: +24VDC |
| signal transmission line | 2×0.3（two-wire system） |
| transmission distance | ≤1000m |
| signal line interface | Internal thread M20×1.5 (LWGY-□C type) |
| Explosion-proof grade | ExdIIBT6 |
| protection class | IP65 |
IV. Measuring range and working pressure: Table 2
| Instrument caliber（mm） | Normal flow range（m3/h） | Extended flow range（m3/h） | Conventional Pressure Resistance（MPa） | Specialized pressure resistance class (MPa) (flange connection type) |
| DN 4 | 0.04～0.25 | 0.04～0.4 | 6.3 | 12、16、25 |
| DN 6 | 0.1～0.6 | 0.06～0.6 | 6.3 | 12、16、25 |
| DN 10 | 0.2～1.2 | 0.15～1.5 | 6.3 | 12、16、25 |
| DN 15 | 0.6～6 | 0.4～8 | 6.3、2.5(flange) | 4.0、6.3、12、16、25 |
| DN 20 | 0.8～8 | 0.45～9 | 6.3、2.5(flange) | 4.0、6.3、12、16、25 |
| DN 25 | 1～10 | 0.5～10 | 6.3、2.5(flange) | 4.0、6.3、12、16、25 |
| DN 32 | 1.5～15 | 0.8～15 | 6.3、2.5(flange) | 4.0、6.3、12、16、25 |
| DN 40 | 2～20 | 1～20 | 6.3、2.5(flange) | 4.0、6.3、12、16、25 |
| DN 50 | 4～40 | 2～40 | 2.5 | 4.0、6.3、12、16、25 |
| DN 65 | 7～70 | 4～70 | 2.5 | 4.0、6.3、12、16、25 |
| DN 80 | 10～100 | 5～100 | 2.5 | 4.0、6.3、12、16、25 |
| DN 100 | 20～200 | 10～200 | 2.5 | 4.0、6.3、12、16、25 |
| DN 125 | 25～250 | 13～250 | 1.6 | 2.5、4.0 |
| DN 150 | 30～300 | 15～300 | 1.6 | 2.5、4.0 |
| DN 200 | 80～800 | 40～800 | 1.6 | 2.5、4.0 |
V. Nominal diameter: Table 3
| model number | Nominal diameter （mm） | L(mm) | H(mm) | G | Lˊ(mm) | D(mm) | d(mm) | hole |
| CH-LW-4 | 4 | 275 | 145 | G1/2 | 215 |
|
|
|
| CH-LW-6 | 6 | 275 | 145 | G1/2 | 215 |
|
|
|
| CH-LW-10 | 10 | 455 | 165 | G1/2 | 350 |
|
|
|
| CH-LW-15 | 15 | 75 | 173 | G1 |
|
Ф65 | Ф14 | 4 |
|
CH-LW-25 CH-LW-32 |
25 32 | 100 140 | 180 | G5/4 G2 |
|
Ф85 Ф100 | Ф14 | 4 |
| CH-LW-40 | 40 | 140 | 178 | G2 |
|
Ф14 |
|
4 |
| CH-LW-50 | 50 | 150 | 252 |
|
|
Ф125 | Ф18 | 4 |
| CH-LW-80 | 80 | 200 | 287 |
|
|
Ф160 | Ф18 | 8 |
| CH-LW-100 | 100 | 220 | 322 |
|
|
Ф180 | Ф18 | 8 |
| CH-LW-150 | 150 | 300 | 367 |
|
|
Ф250 | Ф25 | 8 |
| CH-LW-200 | 200 | 360 | 415 |
|
|
Ф295 | Ф23 | 12 |
VI. Product selection table: Table 4
| Model No. | Explanation | |||||||
| CH-LW | □ | /□ | /□ | /□ | /□ | /□ | /□ | |
| Nominal diameter | 4 |
|
|
|
|
|
|
4mm，Standard range 0.04～0.25m3/h, wide range 0.04～0.4m3/h |
| 6 | 6mm，Standard range 0.1～0.6m3/h, wide measuring wheel for 0.06～0.6m3/h | |||||||
| 10 | 10mm, standard range 0.2~1.2m3/h, wide range 0.15~1.5m3/h | |||||||
| 15 | 15mm, standard range 0.6～6m3/h wide range 0.4～8m3/h | |||||||
| 20 | 20mm, standard range 0.8～8m3/h, wide range 0.4～8m3/h | |||||||
| 25 | 25mm, standard range 1～10m3/h, wide range 0.5～10m3/h | |||||||
| 32 | 32mm, standard range 1.5～15m3/h, wide range 0.8～15m3/h | |||||||
| 40 | 40mm, standard range 2～20m3/h, wide range 1～20m3/h | |||||||
| 50 | 50mm, standard range 4～40m3/h, wide range 2～40m3/h | |||||||
| 65 | 65mm, standard range 7～70m3/h, wide range 4～70m3/h | |||||||
| 80 | 80mm, standard range 10-100m3/h, wide range 5-100m3/h | |||||||
| 100 | 100mm, standard range 20～200m3/h, wide range 10～200m3/h | |||||||
| 125 | 125mm, standard range 25-250m3/h, wide range 13-250m3/h | |||||||
| 150 | 150mm, standard range 30-300m3/h, wide range 15-300m3/h | |||||||
| 200 | 200mm, standard range 80～800m3/h, wide range 40～800m3/h | |||||||
| typology | B | Battery-powered field display type | ||||||
| C | Field display/4～20mA 2-wire current output | |||||||
| C1 | Field display/RS485 communication protocol | |||||||
| C2 | Field display / HART communication protocol | |||||||
| Accuracy Class | 0.5 | Accuracy 0.5 grade | ||||||
| 1.0 | Accuracy 1.0 grade | |||||||
| Turbine Type | W | Wide range turbine | ||||||
| S | Standard turbine | |||||||
| Turbine Type | S | 304 stainless steel | ||||||
| L | 316（L）stainless steels | |||||||
| flameproof | E | Explosion-proof type (Explosion-proof grade)：ExdⅡBT6） | ||||||
| pressure rating | N | General (refer to Table 2) | ||||||
| H(x) | High pressure (refer to Table 2) | |||||||
VII. Technical parameters: Table 5
| Instrument Model | CH-LW-N | CH-LW-A | CH-LW-N | CH-LW- A | CH-LW-B | CH-LW- C |
| signal output | impulse | 4-20mA | impulse | or 4-20mA | not have | 4-20mA/ |
| Power supply | +24VDC±15% | +24VDC±15% | 24VDC±15% | 24VDC±15% | li-ion battery | 24VDC±15% |
| Accuracy Class | 1.0~0.5 grade |
|
1.0~0.5级 | |||
| Measurement range | standard range | standard range | Standard or extended range | |||
| monitor (computer) | / | / | there are | |||
| communication interface | / | / | Optional RS485 | |||
| Instrument Material | stainless steels | stainless steels | stainless steels | |||
| Explosion-proof grade | / | ExdIIBT6/ExiaIICT4 | ExdIIBT6/ExiaIICT4 | |||
| protection class | IP60 | IP65 | IP65 | |||
| Power Consumption | ＜1W | ＜1W | ＜1W | |||
| instrument passages | DN4~DN250 | DN4~DN250 | DN4~DN250 | |||
| Medium temperature | -20℃~120℃ | -20℃~120℃ | -20℃~120℃ | |||
| environmental temperature | -30℃~60℃ | -30℃~60℃ |
-30℃~60℃ |
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