ESMLWQH 4-20mA / RS485 output Gas turbine flowmeter with oil pot
Working Principle
When the fluid flows into the flow meter, it is straightened and accelerated by the dedicated integrated flow straightener at the inlet. Due to the angle between the turbine blades and the fluid flow direction, the turbine generates a driving torque. After overcoming the friction torque and fluid resistance torque, the turbine begins to rotate. Within a certain flow range, the angular velocity of the turbine rotation is proportional to the volumetric flow rate of the fluid. According to the principle of electromagnetic induction, a magnetic sensor is used to detect pulse signals from a coaxially rotating signal wheel that are proportional to the fluid's volumetric flow rate. After amplification, filtering, and shaping, these signals, along with temperature and pressure sensor signals, enter the microprocessor unit of the intelligent flow totalizer for computation and processing, and the gas volumetric flow rate and total amount are directly displayed on the LCD screen.
Product Features
1. Online Non-Stop Air Injection Lubrication: No need to stop air or disassemble the meter; regular push-pull of the oil injection rod can lubricate, making maintenance convenient without affecting production.
2. Ultra-Long Service Life: Self-lubricating bearing, wear-resistant and impurity-resistant, suitable for long-term continuous operation, with a lifespan several times longer than the standard type.
3. High Precision and Stability: Accuracy **±0.5%~±1.0%, repeatability ≤0.1%**, automatic temperature and pressure compensation, reliable for trade settlement.
4. Wide Range, Low Pressure Loss: Range ratio 1:20~1:30, low starting flow rate (<0.5m/s), small pressure loss.
5. Intelligent Display and Output: LCD displays instantaneous / cumulative flow, temperature, and pressure; supports pulse, 4-20mA, RS485, Modbus and other outputs.
6. Protection and Explosion-Proof: Fully sealed structure, IP65/IP67; explosion-proof type ExdⅡBT6 / ExiaⅡCT6, suitable for hazardous locations.
application scenarios
1. City Gas: Metering and trade settlement for gate stations, pressure regulating stations, and residential/commercial users.
2. Industrial Gases: Process metering and energy consumption management of natural gas, nitrogen, compressed air, and chemical gases.
3. Energy Measurement: Accurate metering of fuel gas for boilers, kilns, and gas-fired power generation.
4. Long-Distance Pipelines: Flow monitoring of main and branch pipelines, and transfer metering.
5. Special Conditions: Scenarios requiring long-term continuous operation where frequent meter maintenance is inconvenient.
Product detail
Technical Specifications
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Parameter Table 1 |
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|
Model |
Specifications |
Nominal Diameter (mm) |
Flow range (m³/h) |
Starting Flow Rate (m³/h) |
Pressure Resistance (MPa) |
Installation type |
|
ESMLWQH-25 |
DN25 |
25（1"） |
3-30 |
2 |
1.6 |
Flange |
|
ESMLWQH-32 |
DN32 |
32（1.25"） |
5-50 |
3 |
1.6 |
|
|
ESMLWQH-40 |
DN40 |
40 （1.5"） |
6-60 |
5 |
|
|
|
ESMLWQH-50 |
DN50 |
50 （2"） |
10-100 |
7 |
1.6 |
|
|
ESMLWQH-65 |
DN65 |
65 （2.5"） |
18-180 |
10 |
1.6 |
|
|
ESMLWQH-80 |
DN80 |
80 （3"） |
20-400 |
15 |
1.6 |
|
|
ESMLWQH-100 |
DN100 |
100 （4"） |
30-500 |
20 |
1.6 |
|
|
ESMLWQH-125 |
DN125 |
125 （5"） |
50-600 |
30 |
1.6 |
|
|
ESMLWQH-150 |
DN150 |
150（6"） |
90-1800 |
40 |
1.6 |
|
|
ESMLWQH-200 |
DN200 |
200（8"） |
150-2500 |
60 |
1.6 |
|
|
ESMLWQH-250 |
DN250 |
250 （10"） |
200-4300 |
100 |
1.6 |
|
|
ESMLWQH-300 |
DN300 |
300 （12"） |
300-6300 |
200 |
1.6 |
|
|
For pressures above 1.6MPa, please place an order in advance. |
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Parameter Table 2 |
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|
Accuracy class |
Factory default accuracy is 1.5; other accuracies need to be specified when ordering. |
|
Ambient temperature |
-30℃～+60℃； |
|
Atmospheric pressure |
86KPa～106KPa； |
|
Medium temperature |
-30℃～+100℃ |
|
Relative Humidity |
5%～95% |
|
Power supply |
3.6V lithium battery or external power supply DC24V |
|
Display output mode |
Equipped with temperature and pressure sensors, it can automatically perform compensation and correction calculations for flow under different conditions. It can simultaneously query values such as temperature, pressure, and battery level. It can output high-frequency and low-frequency voltage pulse signals, RS-485 signals, as well as 4-20mA DC two-wire current signals. |
