Caudalímetro de turbina
LWY Series Turbine Flowmeter has the features of simple structure, light weight, high precision, good repeatability, sensitive reaction, and convenient installation and maintenance, etc. The product is typically applicable to water, diesel oil, methanol and other non – aggressive liquids without impurities. Matched with display instrument with special functions, the product has the extra function of quantitative control and over – alarm, and is an ideal meter for flow measurement and energy saving.
Características
- The sensor is the thrust type of the hard alloy bearing, which not only ensures the precision and the wear resistance, but also has the characteristics of simple structure, and convenient disassembly and assembly.
- Various transmitter modes: three – wire pulse output, two – wire 4 – 20mA current output, field display and 4 – 20mA, battery power supply and the others, which are suitable for different occasions.
- Intelligent processing: Multipoint non – line correction of instrument coefficient to ensure high precision of full range.
- The meter coefficient and accumulative flow value are kept even when power off, with no loss for ten years.
Principio de funcionamiento
The fluid flows through the sensor housing. As the impeller blade and flow have a certain angle, the impact force of the fluid makes the blade have a moment of rotation and rotate after overcoming the friction torque and flow resistance. When the rotation speed tends to be stable after the balance of moment, it would be in direct proportion to the velocity of the flow under certain conditions. Because of the magnetic conductivity of the blade, it is in the magnetic field of the signal detector (composed of permanent magnetic steel and coils). The rotating blade cuts the magnetic lines, and periodically changes the magnetic flux of the coil, so that the electric pulse signals are induced at both ends of the coil. The signal is amplified and shaped by the amplifier to form a continuous rectangular pulse wave with a certain range, which can be transmitted far to the display instrument, to display the instantaneous flow or amount of the fluid. In a certain range, the pulse frequency is proportional to the fluid (instantaneous flow rate Q) flowing through the sensor, and the flow calculation formula is as follows:
Q=3600*f/k
f—Pulse frequency (Hz)
k—The meter coefficient (pulse/m³) of the sensor is given by the checklist
Q—Instantaneous flow(m³/h)
Parámetros técnicos
| Measuring medium | liquid (no corrosion to 304 or 316 stainless steel, 2Cr13 steel or nickel and diamond spar Al₂O₃) | |||
| Caliber (DN) mm | Threaded connection | 4、6、10、15、20、25、32、40 | ||
| Flange connection | (15) 、(25)、(32)、(40)、50、65、80、100、125、150、200
(16) (DN15 – 40 are commonly threaded connection, the flange connection needs to be customized.) |
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| Accuracy grade | grade 1 and grade 0.5(The specific flow rate can reach 0.2 level ) | |||
| Repetibilidad | ±0.2% of indicated value | |||
| Temperatura media | -20℃ – +120℃ | |||
| Applicable environment | Temperature: -20℃ – +55℃ Humidity: 5 – 95% | |||
| Protection level | IP67 | |||
| Explosion – proof grade | ExmⅡCT6 ExdⅡBT6 | |||
| Fuente de alimentación | 12VDC, 24VDC or battery powered (3.2V 10AH) | |||
| Output signal | Pulse voltage | voltage amplitude: high level ≥ 8V, low level ≤ 0.8V | Transmission distance ≤ 1000 meters | |
| Standard current | 4 – 20mA DC | |||
| Straight pipe section requirements | Flowmeter upstream ≥ 20DN downstream ≥ 5DN | |||
Flow Range and Nominal Pressure
| Caliber (DN) mm | Normal flow range m³/h | Extended flow range m³/h | Conventional nominal pressure Mpa | High pressure type pressure resistance Mpa |
| 4 | 0.04 – 0.25 | 0.04 – 0.4 | 6.3 | 25 |
| 6 | 0.1 – 0.6 | 0.06 – 0.6 | 6.3 | 25 |
| 10 | 0.2 – 1.2 | 0.15 – 1.5 | 6.3 | 25 |
| 15 | 0.6 – 6 | 0.4 – 8 | 6.3 | 25 |
| 20 | 0.8 – 8 | 0.45 – 9 | 6.3 | 25 |
| 25 | 1 – 10 | 0.5 – 10 | 6.3(Flange 4.0) | 25 |
| 32 | 1.5 – 15 | 0.75 – 15 | 6.3(Flange 4.0) | 25 |
| 40 | 2 – 20 | 1 – 20 | 6.3(Flange 4.0) | 25 |
| 50 | 4 – 40 | 2 – 40 | 2.5 | 25 |
| 65 | 7 – 70 | 4 – 70 | 2.5 | 25 |
| 80 | 10 – 100 | 5 – 100 | 2.5 | 25 |
| 100 | 20 – 200 | 10 – 200 | 2.5 | 25 |
| 125 | 25 – 250 | 13 – 250 | 2.5 | 25 |
| 150 | 30 – 300 | 15 – 300 | 1.6 | 16 |
| 200 | 80 – 800 | 40 – 800 | 1.6 | 16 |
| 250 | 120 – 1200 | / | 1.6 | 16 |
| 300 | 150 – 1500 | / | 1.6 | 16 |
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