Products
Product Overview:
CH-LWQ series gas turbine flowmeter is a high-precision and high-reliability gas precision metering instrument integrating temperature, pressure, flow sensor and intelligent flow totalizer, which is self-developed by absorbing the advanced technology of domestic and foreign flow meters and optimizing the design, and synthesizing the theories of gas mechanics, fluid mechanics and electromagnetism, etc. The instrument has excellent low-pressure and high-pressure metering performance, a variety of signal output modes as well as low sensitivity to the disturbance of the fluid, and is widely applicable to the measurement of natural gas, coal gas, liquefied gas, light hydrocarbon gas and other gases. With excellent low and high pressure metering performance, multiple signal output methods and low sensitivity to fluid disturbance, it is widely used in the metering of natural gas, coal gas, liquefied gas, light hydrocarbon gas and other gases.
The product has been certified by the national quality inspection department of explosion-proof products according to GB3836.2000 “Electrical Equipment for Explosive Gas Environments Part I: General Requirements”, GB38362.2-2000 “Electrical Equipment for Explosive Gas Environments Part 2: Flame-proof ‘d’” and GB3836.4-2000 “Electrical Equipment for Explosive Gas Environments Part 4: General Requirements”, and GB3836.4-2000 “Electrical Equipment for Explosive Gas Environments Part 2: Flame-proof ‘d’”. GB3836.4-2000 Explosive Gas Environment Electrical Equipment Part 4: Intrinsically Safe “i” standard test qualified, explosion-proof mark for Exd Ⅱ BT6 (explosion-proof), Eia Ⅱ CT6 (intrinsically safe). Applicable to 0 (only intrinsically safe) 1, 2 zone hazardous places containing ⅡA, ⅡB, ⅡC class T1 ~ T6 temperature group explosive gas mixtures.
Second, product features:
1. High precision, generally up to ±1%R, ±0.5%R, high precision type up to ±0.2%R;
2. Good repeatability, short-term repeatability of up to 0.05% ~ 0.2%, it is because of good repeatability, such as frequent calibration or online calibration can be extremely high accuracy, in the settlement is the preferred choice of flowmeter;
3. With instrument coefficient three-point correction, intelligent compensation instrument coefficient nonlinearity, and can be corrected on-site
4. All valid data after power down to keep 10 years without losing;
5. Wide range, medium and large caliber up to 1:20, small caliber for 1:10;
6. Compact and lightweight structure, easy installation and maintenance, large circulation capacity;
7. Applicable to high-pressure measurement, the meter body does not have to open holes, easy to make high-pressure type instruments;
8. Can be made into an insertion type, suitable for large-diameter measurement, small pressure loss, low price, can be taken out without stopping the flow, easy to install and maintain
9. Specialized sensor types, according to the user's special needs can be designed for various types of special sensors, such as low-temperature type, two-way type, downhole type, sand mixing special type;
III. Technical parameters
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Implementation standards |
Gas turbine flow meter (GB/T8940-2003) |
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Instrument caliber and connection |
20、25、32、40、50、65、80、100、125、150、200、250、300采用法兰连接 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300 with flange connection 25, 40, 50 can be threaded connection
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Accuracy Class |
±1.5%R（±1%R to be customized）* |
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range ratio |
1:10 ；1:20 ；1:30 |
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Instrument Material |
Table body: 304 stainless steel or cast aluminum
Impeller: anti-corrosion ABS or high quality aluminum alloy
Converter: cast aluminum
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Conditions of use |
Medium temperature：-20℃～+80℃
Ambient temperature：-30℃～+60℃
Relative humidity：5%～90%
Atmospheric pressure: 86Kpa～106Kpa
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Operating power |
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, the battery voltage in the 2.0V ~ 3.0V can work normally.
When the voltage is lower than 2.0 undervoltage indication.
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Energy consumption of the whole machine |
External power supply: < 1W
Internal power supply: average power consumption ≤ 1W, can be used continuously for more than three years.
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Signal output function |
Pulse signal, 4-20mA current signal, control signal |
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Communication output function |
RS485 communication |
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Real-time recording function |
Start-stop recording, daily recording, time interval recording |
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Signal Connector |
Internal thread M20×1.5 or other |
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Explosion-proof grade |
ExdⅡBT6/ExiaⅡCT4 |
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protection class |
IP65 |
IV. Measuring range and working pressure
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Nominal diameter |
model number |
standard range |
Extended range |
Conventional Pressure Rating |
Special high pressure rating |
Installation |
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DN20 |
LWQ－20 |
A |
2.2-25 |
B |
4-40 |
1.6 |
2.5,4.0 |
flangeless |
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DN25 |
LWQ－25 |
A |
2.2-25 |
B |
4-40 |
1.6 |
2.5,4.0 |
Flange (Threaded) |
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DN32 |
LWQ－32 |
A |
5-50 |
B |
6-60 |
1.6 |
2.5,4.0 |
flangeless |
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DN40 |
LWQ－40 |
A |
5-50 |
B |
6-60 |
1.6 |
2.5,4.0 |
Flange (Threaded) |
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DN50 |
LWQ－50 |
A1 |
6-65 |
B1 |
5-70 |
1.6 |
2.5,4.0 |
flangeless |
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LWQ－50 |
A2 |
10-100 |
B2 |
8-100 |
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DN65 |
LWQ－65 |
A |
15-200 |
B |
10-200 |
1.6 |
2.5,4.0 |
flangeless |
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DN80 |
LWQ－80 |
A1 |
13-250 |
B |
10-160 |
1.6 |
2.5,4.0 |
flangeless |
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LWQ－80 |
A2 |
20-400 |
flangeless |
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DN100 |
LWQ－100 |
A1 |
20-400 |
B |
13-250 |
1.6 |
2.5 |
flangeless |
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LWQ－100 |
A2 |
32-650 |
flangeless |
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DN125 |
LWQ－125 |
1 |
25-700 |
B |
20-800 |
1.6 |
2.5 |
flangeless |
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DN150 |
LWQ－150 |
A1 |
32-650 |
B |
80-1600 |
1.6 |
2.5 |
flangeless |
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LWQ－150 |
A2 |
50-1000 |
flangeless |
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DN200 |
LWQ－200 |
A1 |
80-1600 |
B |
50-1000 |
1.6 |
______ |
flangeless |
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LWQ－200 |
A2 |
130-2500 |
flangeless |
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DN250 |
LWQ－250 |
A1 |
130-2500 |
B |
80-1600 |
1.6 |
______ |
flangeless |
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LWQ－250 |
A2 |
200-4000 |
flangeless |
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DN300 |
LWQ－300 |
1 |
200-4000 |
B1 |
130-2500 |
1.6 |
______ |
flangeless |
V. Product Selection
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Product Pictures |
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Instrument Model |
CH-LWQ-N |
CH-LWQ-A |
CH-LWQ-B |
CH-LWQ-C |
CH-LWQ-D |
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signal output |
impulse |
4-20mA |
not have |
4-20mA |
Optional 4-20mA/pulse |
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Power supply |
+24VDC±15% |
+24VDC±15% |
li-ion battery |
24VDC±15% |
24VDC±15%+li-ion battery |
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Accuracy Class |
2.5～1.5 |
1.5～1.0 |
1.5～1.0 |
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Measurement range |
standard range |
Standard or extended range |
Standard or extended range |
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monitor (computer) |
/ |
have |
have |
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Temperature and pressure compensation |
/ |
/ |
have |
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communication interface |
/ |
/ |
RS485 |
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real time recording |
/ |
/ |
have |
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Instrument Material |
Aluminum or stainless steel |
Aluminum or stainless steel |
Aluminum or stainless steel |
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Explosion-proof grade |
ExdIIBT6/ExiaIICT4 |
ExdIIBT6/ExiaIICT4 |
ExdIIBT6/ExiaIICT4 |
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protection class |
IP65 |
IP65 |
IP65 |
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Power Consumption |
< 1W |
< 1W |
< 1W |
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instrument passages |
DN25～DN300 |
DN25～DN300 |
DN25～DN300 |
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Installation |
Flange Mounting |
Flange Mounting |
Flange Mounting |
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Medium temperature |
-20℃～80℃ |
-20℃～80℃ |
-20℃～80℃ |
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environmental temperature |
-30℃～60℃ |
-30℃～60℃ |
-30℃～60℃ |
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VI. Product Selection
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model number |
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clarification |
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CH-LWQ |
□ |
—□ |
□ |
/□ |
/□ |
/□ |
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Instrumentation
Type
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N |
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Sensor type: +12V or 24V power supply, output 3-wire pulse signal |
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A |
4～20mATransmitter type: +24V power supply, output 2-wire 4～20mA |
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B |
Intelligent type: lithium battery power supply, on-site display without signal output |
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C |
4～20mAIntelligent: +24V power supply, on-site display and output 2-wire 4～20mA |
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D |
Fully intelligent: temperature and pressure compensation integration, on-site display and remote signal transmission |
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Nominal diameter and
Range
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25 |
DN 25mm |
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40 |
DN 40 mm |
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50 |
DN 50 mm |
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65 |
DN 65 mm |
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80 |
DN 80 mm |
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100 |
DN 100 mm |
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125 |
DN 125 mm |
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150 |
DN 150 mm |
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200 |
DN 200 mm |
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250 |
DN 250 mm |
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300 |
DN 300 mm |
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Measurement range |
W(x) |
For extended range, please refer to Table 2 on page Px for selection. |
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S(x) |
Standard range, refer to Table 2 on page Px for selection |
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Body Material |
S |
stainless steels |
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L |
aluminum |
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Movement Material |
S |
ABSAnti-corrosion ABS |
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L |
aluminum |
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N |
No special structure |
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A |
Oxygen specific |
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B |
Specialized for compressed air |
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