| Customization: | Available |
|---|---|
| Type: | Intelligent Flow Totalizer |
| Feature: | Intelligent |
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Overview
J-LWQ series Gas Turbine Flowmeter is a kind of precision measuring instrument for gas flow measurement. It has the characteristics of small pressure loss, high accuracy, low initial flow rate, good anti-vibration and anti-pulsation flow performance, wide range ratio, excellent low and high pressure metering performance, multiple signal output modes and low sensitivity to fluid disturbance.
This series flowmeter takes into account the compressibility of the gas, the volume and the temperature of the medium, the pressure is closely related, so the increase of temperature, pressure sensor, track the temperature and pressure changes of the medium, the flow rate is directly converted into the standard state of flow, to ensure the accuracy of measurement. J-LWQ series gas turbine flowmeters can be widely used in petroleum, chemical, electric power, industrial boilers and other gas metering and gas regulator stations, natural gas transmission and distribution network, urban natural gas metering and other fields, and is the preferred flowmeter in trade settlement.
Main Features
1)Reliable measurement. Advanced rectifier technology can overcome the problems of installation conditions are not ideal, the front and back straight pipe section is short, the medium flow rate change is relatively large;
2) Advanced dust-proof structure can effectively prevent the impurities in the medium into the bearing caused by rapid wear, stuck phenomenon;
3) High quality and high strength aluminum alloy turbine and impeller system for oxidation treatment, corrosion resistance, anti-aging, long service life, high accuracy, good repeatability;
4) The use of high-precision dustproof stainless steel flow meter bearings imported from Germany, good stability, high accuracy, good sensitivity, long service life, wide range;
5) Built-in pressure and temperature sensors can detect the temperature, pressure and flow rate of the measured gas, and can automatically track and compensate the flow rate, and the large-screen LCD displays the gas in the standard state directly displays the standard instantaneous volume flow rate and the total volume of the standard volume;
6) Intrinsic safety and flameproof circuit design is suitable for use on occasions with different explosion-proof requirements;
7) Advanced dual-power micro-power technology, low power consumption of the whole machine, not only can be used for more than 3 years with a set of two lithium batteries, but also can be connected to external power supply operation and with battery undervoltage, close valve alarm output function, more suitable for supporting the use of IC card management system;
8) Large-screen LCD display, the display content is rich and clear;
9) Output signal diversification, can be selected according to customer requirements (4 ~ 20) mA standard analog signal, working condition pulse signal, IC card standard volume signal and 485 communication;
10) According to user needs, GPRS network functions can be provided to achieve low-cost, long-distance wireless data real-time transmission; Reserved Internet of Things interface function, can achieve the Internet of Things function.
11) Strong magnetic attack prompt, alarm, record and start the corresponding mechanism;
12) Internal battery low voltage alarm, reminding users to replace the battery in time;
13) Intelligent flow integrator can rotate 350o in counterclockwise direction to facilitate data reading in different directions;
14) Time display and real-time data storage function, no matter what the situation, can ensure that the internal data will not be lost, can be permanently saved;
15) Integrator LCD display can withstand 80ºC high temperature;
16) Display of upper limit of flow under working conditions, display of upper limit of pressure (Error) and record function, easy to understand the real use of the medium;
17) The working mode can be automatically switched, battery powered, two-wire system, three-wire system;
18) When the system module fails, it will prompt the fault content and start the corresponding mechanism;
19) Strong magnetic attack prompt, alarm, record and start the corresponding mechanism;
20) The pressure interface is diversified, can be matched with digital pressure sensor, pressure sensor; Temperature can be matched with Pt100 or Pt1000;
21) The fault of the pressure and temperature sensor can be diagnosed by itself and displayed directly on the LCD screen; When the pressure or temperature sensor fails to "OPEN", the flow integrator will automatically enter the pressure or temperature correction calculation according to the agreed pressure value or temperature value mode, to ensure that the interests of both parties are not damaged;
22) The unique reverse thrust structure design can reduce the bearing force and balance to ensure the long-term reliable use of bearings;
23) The unique sealing chamber pressure balance design can effectively reduce the dust suction bearing clearance caused by bearing wear and stuck.
| Items | Description | ||||||
Operating environment |
Ambient temperature |
Flame-proof type |
-20ºC~+60ºC | ||||
| Intrinsic safety type |
-30ºC~+50ºC | ||||||
| Medium temperature | -30ºC~+80ºC | ||||||
| Relative humidity |
5%~95% | ||||||
| Atmospheric pressure |
50kPa~110kPa | ||||||
| Nominal diameter |
DN25~DN300, please see attached table "H" below for more details, and special requests can be commented | ||||||
| Nominal pressure |
(0~1.6)MPa, Special requests can be commented | ||||||
| Range ratio | Under standard environmental conditions (P=101.325kPa, T=293.15K), the range can reach 40:1 or wider (* Note: For some smaller caliber turbine flowmeters, the range ratio will be reduced). |
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| Accuracy |
±1.0% (0.2Qmax ~ Qmax±1.0%; Qmin ~ 0.2Qmax ±2.0%) ±1.5% (0.2Qmax ~ Qmax±1.5%; Qmin ~ 0.2Qmax ±3.0%) (* Note: Qmin is the minimum flow rate that can be measured within the flow range, Qmax is the maximum flow rate that can be measured within the flow range It is specially indicated that the product is delivered according to level 1.5, and the remaining accuracy levels are specifically stated when ordering.) |
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| Repeatability | Level 1.5 is better than 0.5%; Level 1.0 is better than 0.3% | ||||||
| Explosive-proof grade | Ex db IIC T4 Gb;Ex tb IIIC T80ºC Db | ||||||
| Protection grade | IP65 | ||||||
| Housing material | Aluminum alloy, stainless steel | ||||||
Electrical performance index |
Power supply |
External power supply |
+12~24VD±15%, ripple< 5%, suitable for 4~ 20mA output, pulse output, alarm output,RS-485, etc. | ||||
Internal power supply |
1 set of 3.6V lithium battery, when the voltage is lower than 3.0V, there is an undervoltage indication. | ||||||
Overall power consumption |
Outside power |
<2W | |||||
Internal power |
Average power consumption ≤1mW, a group of two lithium batteries can be used continuously for more than 3 years, when in a dormant state, power consumption ≤0.3mW. | ||||||
Pulse output mode |
Condition pulse signal (FOUT), the condition pulse signal detected by the flow sensor is directly amplified and output by optical coupling isolation, high level ≥20V, low level ≤1V | ||||||
| Equivalent pulse signal (H/L), amplified output by optocoupler isolation, high level amplitude ≥20V, low level amplitude ≤1V, unit pulse represents the standard condition volume can be set range: 0.01m3, 0.1m3, 1m3, 10m3; Upper and lower alarm signal (H/L) : photoelectric isolation, high and low level alarm, working voltage +12V~+24V, maximum load current 50mA; | |||||||
| RS-485 communication (photoelectric isolation) | |||||||
| 4~20mA Standard current Signal (photoelectric isolation) | |||||||
Control signal output |
IC card standard volume signal (IC out) | ||||||
| Battery voltage output (BC end, primary battery low voltage alarm) | |||||||
| Battery undervoltage alarm output (BL end, secondary battery low voltage alarm) | |||||||
| Nominal diameter(mm/inch) | Model | Flow |
Flow range (m³/h) |
Starting flow(m³/h) | Maximum pressure loss(kPa) | Housing material |
| DN25 | J-LWQ-25 | G50 | 4-40 | ≤1 | 1 | ≤DN100 aluminum alloy and 304 optional; ≥DN125 indicates 304 |
| DN32 | J-LWQ-32 | G50 | 4-40 | ≤1 | 1 | |
| DN40 | J-LWQ-40 | G60 | 5-60 | ≤1 | 1 | |
| DN50 | J-LWQ-50 | G100 | 10-160 | ≤2.4 | 2.0 | |
| DN65 | J-LWQ-65 | G160 | 20-200 | ≤2.4 | 2.0 | |
| 80 | J-LWQ-80 | G250 | 20-400 | ≤4.2 | 1.6 | |
| 100 | J-LWQ-100 | G400 | 32-650 | ≤6.7 | 1.8 | |
| 125 | J-LWQ-125 | G450 | 40-700 | ≤6.7 | 1.8 | |
| 150 | J-LWQ-150 | G1000 | 80-1600 | ≤12 | 2.3 | |
| 200 | J-LWQ-200 | G1600 | 130-2500 | ≤20 | 2.2 | |
| 250 | J-LWQ-250 | G2500 | 200-4000 | ≤25 | 2.3 | |
| 300 | J-LWQ-300 | G4000 | 320-6500 | ≤35 | 2.3 |
| Nominal diameter |
L | D | K | N-∅h | H | Notes |
| DN25 | 200 | 115 | 85 | 4-φ14 | 335 | The parameters in the table are the dimensions under 1.6MPa pressure. Unit: mm DN100 caliber aluminum alloy length is 240; Stainless steel length is 300. |
| DN32 | 200 | 140 | 100 | 4-φ18 | 345 | |
| DN40 | 200 | 150 | 110 | 4-φ18 | 365 | |
| DN50 | 200 | 165 | 125 | 4-φ18 | 375 | |
| DN80 | 240 | 200 | 160 | 8-φ18 | 409 | |
| DN100 | 300(240) | 220 | 180 | 8-φ18 | 430 | |
| DN150 | 300 | 285 | 240 | 8-φ22 | 495 | |
| DN200 | 360 | 340 | 295 | 12-φ22 | 559 | |
| DN250 | 400 | 405 | 355 | 12-φ26 | 629 | |
| DN300 | 400 | 460 | 410 | 12-φ26 | 680 |
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