LWGY series turbine flowmeter is a new generation of turbine flowmeters which has absorbed the advanced technology of flow meter at home and abroad,and is manufactured according to JB/9246-199 standard. It has the characteristics of simple structure, light weight, high precision, good reproducibility, high responsiveness, easy installation and maintenance.
It is widely used to measure the liquid in closed pipeline. The liquid does not corrode stainless steel 1cr18Ni9Ti, 2Cr13 and corundum AI203 cemented carbide, and has no impurities such as fiber particles. The kinematic viscosity at working temperature is less than 5×10-6m2/s.For liquids with a kinematic viscosity greater than 5 × 10 m / s, the flow meter can be used after real liquid calibration.If it is matched with a display instrument with special functions, it can also perform quantitative control, excess alarm, etc, which is an ideal meter for flow metering and energy saving.
1. High-definition LCD display
2. Three-key parameter setting and debugging
3.5-segment polyline correction function for non-linear signals
4. Linear current output
5. Frequency pulse output: DC power can be used to supply power to the pulse output circuit. At this time, the meter can convert the mV pulse signal output by the turbine sensor into a standard TTL pulse,which can be used for linear signal users debugging.
Good repeatability with short-term repeatability of 0.05%-0.2%. Due to good repeatability, such as frequent calibration or online calibration, it can get very high precision,which is the preferred flow meter in trade settlement;
Output pulse frequency signal, it is suitable for total metering and connected with computer, without zero drift, and with strong anti-interference ability;
It can obtainHigh frequency signal (3~4kHz) with strong signal resolution;
The range of medium and large caliber can reach 1:20, and the range of small caliber is 1:10;
It has the characteristics of compact structure, light weight, convenient installation and maintenance, and large circulation capacity；
It is suitable for high-pressure measurement, no need to open holes on the meter body, easy to make high-pressure type instrument;
It has many special sensor types, which can be designed into various types of special sensors according to the special needs of users, such as low temperature type, two-way type, downhole type, sand mixing type, etc.
It can be made into plug-in type, suitable for large caliber measurement, with low pressure loss, low price, continuous flow, and easy installation and maintenance.
(1) Structural Characteristics
The sensor is a hard alloy bearing thrust type, which can ensure accuracy, improve wear resistance, and has the characteristics of simple structure, firmness and convenient assembly and disassembly.
(2)Working principle
When the fluid flows through the sensor housing, since the blade of the impeller has a certain angle with the flow direction, the force of the fluid causes the blade to have a rotational moment. After the friction torque and the fluid resistance are overcome, the blade rotates. After balancing the torque, the rotational speed is stable. Under certain conditions, the speed is proportional to the flow rate.Due to the magnetic permeability of the blade, it is in the magnetic field of the signal detector (composed of permanent magnet and coil). The rotating blade cuts the magnetic line and periodically changes the magnetic flux of the coil, so that the electric pulse signal is induced at both ends of the coil. This signal is amplified and shaped by the amplifier to form a continuous rectangular pulse wave with a certain degree of amplitude, which can be transmitted to the display instrument, showing the instantaneous flow or total amount. Within a certain flow range, the pulse frequency f is proportional to the instantaneous flow rate Q of the fluid flowing through the sensor. The flow equation is: Q=f/k*3600
f—pulse frequency [Hz]
k—the meter factor of the sensor [1/m3], given by the checklist
The meter factor of each sensor is filled in the verification certificate by the manufacturer, and the k value is set in the matching display meter to display the instantaneous flow rate and the cumulative total amount.
LWGY series turbine flowmeter is a new generation of turbine flowmeters which has absorbed the advanced technology of flow meter at home and abroad,and is manufactured according to JB/9246-199 standard. It has the characteristics of simple structure, light weight, high precision, good reproducibility, high responsiveness, easy installation and maintenance.
It is widely used to measure the liquid in closed pipeline. The liquid does not corrode stainless steel 1cr18Ni9Ti, 2Cr13 and corundum AI203 cemented carbide, and has no impurities such as fiber particles. The kinematic viscosity at working temperature is less than 5×10-6m2/s.For liquids with a kinematic viscosity greater than 5 × 10 m / s, the flow meter can be used after real liquid calibration.If it is matched with a display instrument with special functions, it can also perform quantitative control, excess alarm, etc, which is an ideal meter for flow metering and energy saving.
1. High-definition LCD display
2. Three-key parameter setting and debugging
3.5-segment polyline correction function for non-linear signals
4. Linear current output
5. Frequency pulse output: DC power can be used to supply power to the pulse output circuit. At this time, the meter can convert the mV pulse signal output by the turbine sensor into a standard TTL pulse,which can be used for linear signal users debugging.
Good repeatability with short-term repeatability of 0.05%-0.2%. Due to good repeatability, such as frequent calibration or online calibration, it can get very high precision,which is the preferred flow meter in trade settlement;
Output pulse frequency signal, it is suitable for total metering and connected with computer, without zero drift, and with strong anti-interference ability;
It can obtainHigh frequency signal (3~4kHz) with strong signal resolution;
The range of medium and large caliber can reach 1:20, and the range of small caliber is 1:10;
It has the characteristics of compact structure, light weight, convenient installation and maintenance, and large circulation capacity；
It is suitable for high-pressure measurement, no need to open holes on the meter body, easy to make high-pressure type instrument;
It has many special sensor types, which can be designed into various types of special sensors according to the special needs of users, such as low temperature type, two-way type, downhole type, sand mixing type, etc.
It can be made into plug-in type, suitable for large caliber measurement, with low pressure loss, low price, continuous flow, and easy installation and maintenance.
(1) Structural Characteristics
The sensor is a hard alloy bearing thrust type, which can ensure accuracy, improve wear resistance, and has the characteristics of simple structure, firmness and convenient assembly and disassembly.
(2)Working principle
When the fluid flows through the sensor housing, since the blade of the impeller has a certain angle with the flow direction, the force of the fluid causes the blade to have a rotational moment. After the friction torque and the fluid resistance are overcome, the blade rotates. After balancing the torque, the rotational speed is stable. Under certain conditions, the speed is proportional to the flow rate.Due to the magnetic permeability of the blade, it is in the magnetic field of the signal detector (composed of permanent magnet and coil). The rotating blade cuts the magnetic line and periodically changes the magnetic flux of the coil, so that the electric pulse signal is induced at both ends of the coil. This signal is amplified and shaped by the amplifier to form a continuous rectangular pulse wave with a certain degree of amplitude, which can be transmitted to the display instrument, showing the instantaneous flow or total amount. Within a certain flow range, the pulse frequency f is proportional to the instantaneous flow rate Q of the fluid flowing through the sensor. The flow equation is: Q=f/k*3600
f—pulse frequency [Hz]
k—the meter factor of the sensor [1/m3], given by the checklist
The meter factor of each sensor is filled in the verification certificate by the manufacturer, and the k value is set in the matching display meter to display the instantaneous flow rate and the cumulative total amount.
1.LWGY liquid turbine flowmeter basic parameters
Meter caliber (mm) and connection method | 4, 6, 10, 15, 20, 25, 32, 40 , 50 with threaded connection |
15, 20, 25, 32, 40,50, 65, 80, 100, 125, 150, 200 with flange connection | |
Accuracy level | ±1%R、±0.5%R、±0.2%R (need to be specially made) |
Range ratio | 1:10；1:15；1:20 |
Meter material | 304 stainless steel, 316 (L) stainless steel, etc. |
Measured medium temperature (℃) | -20~ + 120℃ |
Environmental conditions | Temperature -10~ + 55℃, relative humidity 5%-90%, atmospheric pressure 86~106Kpa |
Output signal | Sensor: pulse frequency signal, low level ≤0.8V high level ≥8V |
Transmitter: 2-wire 4 ~ 20mADC current signal | |
Power supply | Sensor: +12VDC, +24VDC (optional) |
Transmitter: +24VDC | |
On-site display type: the meter with 3.6V lithium battery or 24VDC | |
Signal transmission line | RVVP 3x0.5 (three-wire), 2x0.5 (two-wire) |
Transmission distance | ≤1000m |
Signal line interface | Basic type: Hessmann connector or with three-core cable; explosion-proof type: internal thread M20xl.5 |
Explosion-proof grade | Basic type: non-explosion-proof product; explosion-proof type: ExdIICT6 |
Protection level | IP65 |
2.LWGY turbine flowmeter signal detector performance and functional specifications
Power supply voltage | 12V~32V DC; |
Influence of power supply change | No more than 0.01%/V; |
Electrostatic discharge immunity | 3 level:Ia contact 6KV,Ib air 8KV |
Power frequency magnetic field immunity | 3 level:Stable continuous magnetic field experiment, strength is 10A/m |
Surge immunity | Differential-mode 2 level:1kv,common mode 3 level:2kv |
Pulse group immunity | 2 level:In the power supply port, protective ground, voltage peak 1KV, repetition frequency 5 or 100kHz; in the input and output signals, data and control ports, voltage peak 0.5KV, repetition frequency 5 or 100kHz; |
Output load change impact | Not more than 0.05% (50~1000 ohms, lower limit and range change); |
Configuration function | Configuration of engineering unit, measured medium, medium density, range, display, alarm value, etc.; cumulative flow clear function; |
Alarm | Set upper and lower limits of the alarm. Lower than the lower limit output 3.8mA; higher than the upper limit output 22mA; |
Monitoring dynamic variables | Instantaneous flow rate, percentage, output current, cumulative flow rate, frequency, etc. |
Flow calibration | The K value of the instrument coefficient can be corrected by the 2~5 point; |
Local configuration function | Configuration of engineering unit, measured medium, medium density, range, display, alarm value, etc., and it has cumulative flow clearing and data recovery functions; |
LCD | With backlight, with symbol, and three lines display. The first line displays the instantaneous flow and the second line displays the cumulative flow. The third line can display the percentage, output current, etc., and a variety of engineering units can be displayed on the LCD screen. The supported units are: I/s .I/m , l/h , m3/s, m3/m . m3/h , m3/d . Scf/s . Scf/m . Scf/h . cf/s, Cf/m, cf/h, USG/s, USG/m, USG/h . UKG/s . UKG/m , UKG/h , bbl/h , bbl/d , g/s , g/m ,g/ h , kg / s , kg / m . kg / h , kg / d , t / m , t / h , t / d , Ib / h , Ib / d ; |
Data backup and recovery | The manufacturer can back up the configuration information such as the range before delivery. If the meter is not working properly due to users’ fail, it can be restored to the factory state. |
Defensive function | The instrument has the function of power failure protection and traffic accumulation. |
3. Measurement range and working pressure
Meter caliber | Normal flow range（m3/h ） | Extended flow range | Conventional connection mode and pressure grade | Special pressure grade (Mpa) |
DN4 DN6 DN10 | 0.04〜0.25 0.1〜0.6 0.2〜1.2 | 0.04〜0.4 0.06〜0.6 0.15〜1.5 | Threaded connection/6.3MPa | 10、16、25 10、16、25 10、16、25 |
DN15 | 0.6〜6 | 0.4〜8 | Threaded connection/6.3MPa | 4.0、6.3、12、16、25 |
DN20 | 0.8〜8 | 0.45〜9 | Threaded connection/6.3MPa | 4.0、6.3、12、16、25 |
DN25 | 1〜10 | 0.5〜10 | Threaded connection/6.3MPa | 4.0、6.3、12、16、25 |
DN32 | 1.5〜15 | 0.8〜15 | Threaded connection/6.3MPa | 4.0、6.3、12、16、25 |
DN40 | 2〜20 | 1〜20 | Threaded connection/6.3MPa | 4.0、6.3、12、16、25 |
DN50 | 4〜40 | 2〜40 | Flange connection/2.5MPa | 4.0、6.3、12、16、25 |
1.According to the meter function, LWGY series turbine flowmeter can be divided into 2 categories, namely: (1) turbine flow sensor / transmitter (2) intelligent display turbine flowmeter
(1) Turbine flow sensor / transmitter
This type of turbine flow product itself does not have function of on-site display, only transmitte the flow signal far. The flow signal can be divided into pulse signal or current signal (4-20mA). The meter price is low, with high integration, and small volume,which is especially suitable for use with computer control systems such as secondary display, PLC and DCS.
According to different output signals, these products can be divided into LWGY-□ N-type and LWGY-□ A-type.
LWGY- N-type sensor: 24VDC power supply, three-wire pulse output, high level ≥8V, low level ≤0.8V; signal transmission distance is ≤1000 meters;
LWGY-□A type transmitter: 24VDC power supply, 2-wire 4-20mA output, signal transmission distance ≤1000
This type of turbine flow products are divided into basic type and explosion-proof type (Exdiict 6), and the shape is as shown in Figure 1 (Figure 2).
(2)Intelligent display turbine flowmeter
The double-row liquid crystal on-site displayc is used for the new intelligent meter integrating turbine flow sensor and display calculation using advanced ultra-low-power single-chip microcomputer technology adopts, which has the advantages of compact mechanism, intuitive and clear reading, high reliability, no external power interference, lightning strike resistance and low cost.The meter has three-point correction of the meter factor, intelligently compensates the nonlinear meter factor, and can be corrected on site. The high-definition liquid crystal display simultaneously displays instantaneous flow and cumulative flow, with clear function. All valid data is not lost after 10 years of power failure. This type of turbine flowmeter is explosion-proof.
The explosion-proof grade is: EXDIICT 6.
This type of turbine flowmeter can be divided into LWGY-□B type and LWGY-□C type according to the power supply mode and whether it has remote signal output.
LWGY-□B type: 36V/10Ah lithium battery is uesd for the power supply (can run continuously for more than 3 years);
LWGY-□C type: 2AVDC external power supply is used for the power supply, and outputs 4-20mA standard two-wire current signal, and HART communication or RS485 communication function can be increased according to different site needs.
1.According to different installation methods
2.Outline drawing of flange installation
Regional ManagerManager Peng
Contact number86-18030837175
Regional ManagerManager Zeng
Contact number86-18520508508
Regional ManagerManager Jiang
Contact number86-13324545911
Regional ManagerManager Gao
Contact number86-13871508295
Regional ManagerManager Yuan
Contact number86-13711120640
