LWQ gas turbine flow meter integrates gas turbine flow sensor and flow converter, its main performance index reaches the international advanced level. It is an ideal instrument for gas metering such as petroleum, chemical industry, electric power, metallurgical industry and civil boiler, as well as for urban gas and gas pressure regulating station metering and gas trade metering.
Made in China. brand DDTOP, model LWQ
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LWQ series gas turbine flowmeter integrates gas turbine flow sensor and flow converter. The main performance index reaches the international advanced level, and it is an ideal instrument for gas measurement of petroleum, chemical, electric power, metallurgy industry and civil boiler, city gas, gas pressure station measurement and gas trade measurement.
Operating Principle
Flow meter structure
The basic structure of the temperature and pressure compensated type gas turbine flowmeter is shown in the figure, which
mainly consists of the meter body, movement (front guide, middle guide, rear guide), connection base and converter.
When the airflow enters the flowmeter, it will first pass through the leading fluid of the independent movement and accelerate. The turbine blades are at a certain angle with the flow direction of the fluid. Under the action of the fluid, the turbine generates a rotational torque at this time. After the turbine overcomes the resistance torque and the friction torque, it starts to rotate. When the forces are balanced, the speed is stable, and the turbine rotation speed is linear with the flow rate. The magnet on the rotating transmitter plate periodically changes the sensor’s magnetic resistance. Pulse signals proportional to the volume flow of the fluid are induced at both ends. The signal is amplified and reshaped by the preamplifier, and the pressure and temperature signals detected by the pressure and temperature sensor are simultaneously output to the flow totalizer for processing, which directly displays the standard volume flow rate and the standard volume total.
Features
1.With new sensor, the initial flow rate is low, the pressure loss is small, the anti-vibration and anti-pulse fluidity is not easy to corrode, the reliability is good and the service life is long.
2.It adopts a new integrated chip with high performance and high precision, powerful function and superior performance.
3.It adopts advanced micro power consumption high and new technology, the whole machine power consumption is low. It can be operated by internal battery for a long time and by external power supply.
4.According to the flow frequency signal, the instrument series can be automatically modified in eight segments at most, and the calculation accuracy of the instrument can be improved according to the needs of users.
5.It adopts the EEPROM data storage technology, it has the function of storing and querying historical data, and three kinds of historical data recording methods can be chosen by users.
6.Flow meter head can rotate 180℃, easy to install and use.
7.High accuracy, it can be up to ±1.5%R, ±1.0%R.
8.Good repeatability, short-term repeatability can reach 0.05% R~0.2% R. It is precisely because of good repeatability, such as regular calibration or on-line calibration can get extremely high accuracy, it is the preferred flow meter in trade settlement.
9.The temperature, pressure and flow rate of the measured gas can be detected, and the flow rate can be automatically tracked and compensated, and the gas flow rate under the standard transition state (pn=101.325 kpa,Tnpn=293.15 k) can be displayed. The data of temperature, pressure, time, date and so on can be also queried in real time.
Applications
Crude Oil Treatment: Metering Station
| Executive standard | Measurement of gas flow in closed pipelines- turbine flow sensor (GB/T8940-2003) | ||||
| Instrument size (mm) and connection type | Flange connection type
|
Stainless steel | DN25-DN300 | ||
| Carbon steel | DN350, DN400 | ||||
| Thread connection type | Carbon steel | DN25, DN40, DN50 | |||
| Accuracy | ±1.5%R (±1%R needs to be customized) | ||||
| Range ability | 1:10 ; 1:20 ; 1:30 | ||||
| Material construction | Body: SS304(DN25-DN300 ), CS(DN350 , DN400 )
Blade: Anti-corrosion ABS or high-quality aluminum alloy Conditioning plate：DN25-DN150 is ABS, DN200 is cast aluminum alloy Converter： Die-cast aluminum alloy |
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| Working condition | Ambient temperature:-20°C~+60°C | Relative humidity：5%~90% | |||
| Medium temperature: -30°C~+80°C | Atmospheric pressure: 86kPa~106kPa | ||||
| Power supply | A. External power supply: +24VDC±15%, ripple＜±5%,applicable to 4-20mA output, pulse output, RS485,etc. B. Internal power supply: 1 set of 3.6V 10AH lithium battery, the battery voltage is 3.0V-3.6V for normal operation.Under voltage indication appears when the voltage is below 3.0. | ||||
| Overall power consumption | A. External power supply: ＜2W
B. Internal power supply: average power consumption＜800uA. |
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| Flange standard | Normal standard | GB/T 9113-2000 | |||
| Other standards
|
International standard | DIN, ANSI, JIS | |||
| China standard | HG, GB | ||||
| Thread standard | Normal standard | BSP thread (male) (refer to GB/T7307-2001) | |||
| Other standards | Female thread, NPT thread, etc. | ||||
| Signal output | Pulse signal, 4-20mA current signal, Control signal | ||||
| Communication output | RS485 communication, Optional HART, GPRS | ||||
| Real-time recording | Start-stop record, daily record, fixed time interval record | ||||
| Signal line interface | Female M20X1.5 or other | ||||
| Ingress protection | IP65 | ||||
| Explosion-proof | ExdIICT6 Gb | ||||
| Electrical Interface | M20*1.5 female thread (NPT thread on request) | ||||
| Model | Contents | |||||||||
| LWQ- | □ | -□ | -□ | -□ | -□ | -□ | -□ | -□ | -□ | |
| Instrument Type | N | 24V power supply, no local display, pulse output | ||||||||
| A | 24V power supply, no local display, 4-20mA output | |||||||||
| G1 | Local display, battery powered, no output | |||||||||
| GX | Local display, external power supply, current output/RS485 output/pulse output | |||||||||
| E1 | Local display, battery powered, no output | |||||||||
| EX | Local display, external power supply, current output/RS485/pulse output | |||||||||
| D2 | Temperature and pressure compensation type, dual power supply, RS485/current output/pulse output | |||||||||
| D4 | Temperature and pressure compensation type, dual power supply, current output/RS485 output/pulse output | |||||||||
| Nominal diameter | 25 | DN25 | ||||||||
| 40 | DN40 | |||||||||
| 50 | DN50 | |||||||||
| 80 | DN80 | |||||||||
| 100 | DN100 | |||||||||
| 150 | DN150 | |||||||||
| 200 | DN200 | |||||||||
| 250 | DN250 | |||||||||
| 300 | DN300 | |||||||||
| 350 | DN350 | |||||||||
| 400 | DN400 | |||||||||
| Connection Type | FL | Flange connection | ||||||||
| LW | Threaded connection | |||||||||
| Z | Special specification | |||||||||
| Measuring Range | S | Standard range, please refer to Table 1 on page 2 for selection | ||||||||
| W | Extended range, please refer to Table 1 on page 2 for selection | |||||||||
| Z | Special range | |||||||||
| Body Material | S | Stainless steel | ||||||||
| C | Carbon steel | |||||||||
| Rotor Material | S | Anticorrosive ABS | ||||||||
| L | Aluminum alloy | |||||||||
| Explosion-proof | N | Non explosion-proof | ||||||||
| E | ExdIICT6 Gb | |||||||||
| Pressure Rating | N | 1.6MPa | ||||||||
| H(x) | 4-2High pressure refer to table 4-2 | |||||||||
| Accuracy | 10 | 1%R | ||||||||
| 15 | 1.5%R | |||||||||
| Z | Special accuracy requirement | |||||||||
Note:
DN20, DN32, DN65, and DN125 are non-national standard products and need to be customized. X is a number, representing different functions, please consult the sales.
You can request the necessary certificates, documentation, instructions and user manuals for DDTOP LWQ using the special form.
You can buy DDTOP LWQ in UK or Europe at a favourable price in «DOLCHETRADE» by leaving a request on the website, by phone +441225535040 or by email dolce@dolcetrade.com. DDTOP LWQ price are subject to change depending on exchange rates. We deliver instruments by transport companies in the United Kingdom and Europe.
See also: Digital flow meters, Explosion proof flow meters, Flanged flow meters, Flow meters, Flow meters 4 20ma, Flow meters for large pipes, Flow meters rs485, Flow meters with analog output, Flow meters with hart protocol, Flow meters with pulse output, High pressure flow meters, Hydrogen flow meters, Mass flow meters, Nitrogen gas flow meters, Oxygen flow meters, Screw flow meters, Smart flow meters, Stainless steel flow meters, Turbine flow meters, Wireless flow meters
