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Address
Jinnan Industrial Park, Jinhu County, Huai'an City, Jiangsu Province
Jinhu Jinma Automation Instrument Factory
Jinnan Industrial Park, Jinhu County, Huai'an City, Jiangsu Province
1Intelligent gas turbine flowmeterOverview
The gas turbine flowmeter is a new type of intelligent instrument that integrates the turbine flow sensor and display integration developed using an ultra-low power single-chip microcomputer. It adopts a dual row LCD on-site display and has obvious advantages such as compact structure, intuitive and clear readings, high performance, no interference from external power sources, lightning resistance, and low cost. The instrument has three-point correction of instrument coefficient, intelligent compensation of instrument coefficient nonlinearity, and can be corrected on site. Clear LCD display simultaneously shows instantaneous flow rate (4 significant digits) and cumulative flow rate (8 significant digits, with reset function). Keep all valid data intact for 10 years after power failure. This type of turbine flowmeter is an explosion-proof product with an explosion-proof rating of ExdIIBT6.
Gas turbine flow meters can be divided into LWGQ - □ B type and LWGQ - □ C type according to power supply mode and whether they have remote signal output.
LWQ - □ B type: The power supply uses a 3.2V10AH lithium battery (which can operate continuously for more than 4 years); No signal output function.
LWQ - □ C type: The power supply adopts 24VDC external power supply, outputs 4-20mA standard two-wire current signal, and can add RS485 or HART communication according to different on-site needs.
IIIntelligent gas turbine flowmeterProduct Features
1. The accuracy level can generally reach ± 1% R, ± 0.5% R, and the accuracy type can reach ± 0.2% R;
2. Repeatability, short-term repeatability can reach 0.05%~0.2%, precisely because of its good repeatability, flow meters are selected in trade settlement;
3. Equipped with three-point correction of instrument coefficients, intelligent compensation of instrument coefficient nonlinearity, and on-site correction capability
4. Keep all valid data intact for 10 years after power failure;
5. Wide range, with a medium to large caliber of up to 1:20 and a small caliber of 1:10;
6. Compact and lightweight structure, easy installation and maintenance, and high circulation capacity;
7. Suitable for pressure measurement, there is no need to open holes on the instrument body, making it easy to make pressure gauges;
8. There are various types of sensors, which can be designed according to user needs, such as low-temperature, bidirectional, downhole, mixed sand, etc;
9. 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.

Parameters of gas turbine flowmeter
| execution standard | Measurement of gas flow in closed pipelines - Gas turbine flowmeter (GB/T8940-2003) |
| Instrument diameter (mm) and connection method | 20. 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300 are connected by flanges |
| 25, 40, and 50 can be connected using threaded connections | |
| accuracy class | ± 1.5% R (± 1% R needs to be customized)* |
| turndown ratio | 1:10 ; 1:20 ; 1:30 |
| Instrument material | Table body: 304 stainless steel or cast aluminum |
| Impeller: anti-corrosion ABS or aluminum alloy | |
| Converter: Cast aluminum | |
| Terms of Use | Medium temperature: -20 ℃ to+80 ℃ |
| Environmental temperature: -30 ℃ to+60 ℃ | |
| Relative humidity: 5% to 90% | |
| Atmospheric pressure: 86Kpa to 106Kpa | |
| working power supply | A. External power supply:+24VDC ± 15%, ripple ≤ ± 5%, suitable for 4-20mA output, pulse output, RS485, etc |
| B. Internal power supply: 1 set of 3.0V10AH lithium batteries, which can work normally when the battery voltage is between 2.0V and 3.0V. | |
| Under voltage indication occurs when the voltage is below 2.0 | |
| Whole machine energy consumption | External power supply:<1W |
| Internal power supply: average power consumption ≤ 1W, can be used continuously for more than three years. | |
| Signal output function | Pulse signal, 4-20mA current signal, control signal |
| Communication output function | RS485 communication |
| Real time recording function ⑤ | Start stop record, diary record, and fixed time interval record |
| Signal wiring port | Internal thread M20 × 1.5 or other |
| Explosion-proof rating | Exd Ⅱ BT6 or Exia Ⅱ CT4 |
| protection level | IP65 |
Reference for flow range of gas turbine flowmeter
| Nominal Diameter | model | Standard range | Expand range | Conventional voltage withstand level | Special pressure grade | Installation method | ||
| (mm) | (m³/h) | (m³/h) | (Mpa) | (Mpa) | ||||
| DN20 | LWQ-20 | A | 2.2-25 | B | 4-40 | 1.6 | 2.5,4.0 | flange |
| DN25 | LWQ-25 | A | 2.2-25 | B | 4-40 | 1.6 | 2.5,4.0 | flange |
| DN32 | LWQ-32 | A | 5-50 | B | 6-60 | 1.6 | 2.5,4.0 | flange |
| DN40 | LWQ-40 | A | 5-50 | B | 6-60 | 1.6 | 2.5,4.0 | flange |
| DN50 | LWQ-50 | A1 | 6-65 | B1 | 5-70 | 1.6 | 2.5,4.0 | flange |
| LWQ-50 | A2 | 10-100 | B2 | 8-100 | ||||
| DN65 | LWQ-65 | A | 15-200 | B | 10-200 | 1.6 | 2.5,4.0 | flange |
| DN80 | LWQ-80 | A1 | 13-250 | B | 10-160 | 1.6 | 2.5,4.0 | flange |
| LWQ-80 | A2 | 20-400 | flange | |||||
| DN100 | LWQ-100 | A1 | 20-400 | B | 13-250 | 1.6 | 2.5 | flange |
| LWQ-100 | A2 | 32-650 | flange | |||||
| DN125 | LWQ-125 | 1 | 25-700 | B | 20-800 | 1.6 | 2.5 | flange |
| DN150 | LWQ-150 | A1 | 32-650 | B | 80-1600 | 1.6 | 2.5 | flange |
| LWQ-150 | A2 | 50-1000 | flange | |||||
| DN200 | LWQ-200 | A1 | 80-1600 | B | 50-1000 | 1.6 | ______ | flange |
| LWQ-200 | A2 | 130-2500 | flange | |||||
| DN250 | LWQ-250 | A1 | 130-2500 | B | 80-1600 | 1.6 | ______ | flange |
| LWQ-250 | A2 | 200-4000 | flange | |||||
| DN300 | LWQ-300 | 1 | 200-4000 | B1 | 130-2500 | 1.6 | ______ | flange |