Flow technology turbine flow meter China, this article takes you to understand everything before purchasing turbine flow meters.
Turbine flow meter is often used for liquid and gas measurement. The gas turbine is mainly natural gas. Liquid Turbine Flow is the turbine flow meter suitable for liquid flow rate measurement. Like water flow, Diesel flow. The turbine flow meter is the most popular equipment to measure flow electronically. They offer a wide flow and application rangeability. Turbine Flow Meters are easy to maintain, durable and versatile.
Sino-Inst offers a variety of Turbine flow meters for flow measurement. If you have any questions, please contact our sales engineers.
Features of Turbine Flowmeters
- The pressure loss is small, and the impeller has anti-corrosion function;
- Adopt advanced ultra-low power consumption single-chip microcomputer technology. The whole machine has strong functions, low power consumption and superior performance;
- Intelligent flow display with nonlinear precision compensation function. The accuracy of the revised formula is better than ±0.02%;
- The instrument coefficient can be set online by the button. And can be displayed on the LCD screen. The LCD screen is intuitive and clear, with strong reliability;
- EEPROM is used to protect the cumulative flow and instrument coefficient from power failure. The protection period is greater than 10 years;
- Adopt high-performance MCU central processing unit. Completion of data collection and processing, display output, cumulative flow and instantaneous flow are the same;
- Realization of convenient man-machine interface with screen display. Data transmission in standard 485 format;
- It adopts full hard alloy (tungsten carbide) shielded cantilever beam structure bearing. Integrates rolling bearing and pressure bearing. Greatly improved bearing life. And can work in the medium with a small amount of sediment and dirt;
- Adopt 1Cr18Ni9Ti all stainless steel structure. (The turbine adopts 2Cr13) Good anti-corrosion performance; 10. Easy to maintain, with self-rectifying structure. Small, lightweight, and simple in structure, it can be assembled and disassembled in a short time;
- Simple internal cleaning;
- Strong anti-magnetic interference and vibration ability, reliable performance and long service life;
- The lower limit flow rate is low and the measurement range is wide;
- On-site display type LCD screen shows clear and intuitive, low power consumption. 3V lithium battery power supply can run continuously for more than 5 years;
- Corrosion-resistant materials are optional;
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Featured Turbine Flow Meters for Sale
Reference price: US $200-1,500/ Piece. Contact Sino-Inst sales manager now to request a quotation!
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The gas turbine flowmeter uses a turbine for measurement. It first converts the flow rate into the rotational speed of the turbine, and then converts the rotational speed into an electrical signal proportional to the flow rate.
Gas turbine flowmeter is used to detect instantaneous flow and total integrated flow. Its output signal is frequency, which is easy to digitize.
The induction coil and the permanent magnet are fixed on the housing together. When the ferromagnetic turbine blade passes the magnet, the reluctance of the magnetic circuit changes, thereby generating an induction signal.
The signal is amplified and reshaped by the amplifier and sent to the counter or frequency meter. The total accumulated flow is displayed. At the same time, the pulse frequency undergoes frequency-voltage conversion to indicate instantaneous flow.
The speed of the impeller is proportional to the flow, and the number of revolutions of the impeller is proportional to the total amount of flow. The output of the turbine flowmeter is a frequency modulated signal. It not only improves the anti-interference of the detection circuit, but also simplifies the flow detection system.
The gas turbine flowmeter has a turndown ratio of up to 10:1, and the accuracy is within ±0.2%. The time constant of the turbine flowmeter with small inertia and small size can reach 0.01 second.
Liquid Turbine Flow Meter is a speed type flow meter based on the principle of torque balance.
The fluid flows through the sensor housing. Because the blades of the impeller have a certain angle with the flow direction. The impulse of the fluid makes the blades have a rotational torque. After the friction torque and fluid resistance are overcome, the blades rotate. The speed is stable after the torque is balanced.
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 magnets and coils). The rotating blade cuts the magnetic lines of force. The magnetic flux of the coil is periodically changed. Electrical pulse signals are induced at both ends of the coil.
This signal is amplified and reshaped by an amplifier. A continuous rectangular pulse wave with a certain amplitude is formed. It can be transmitted to the display instrument remotely. The instantaneous flow or total amount of the fluid is displayed.
Within a certain flow range, the pulse frequency f is proportional to the instantaneous flow Q of the fluid flowing through the sensor. The flow equation is:
Where:
f——Pulse frequency [Hz]
k——The meter coefficient of the sensor [1/m3], which is given by the calibration sheet.
Q——The instantaneous flow of fluid (under working condition) [m3/h]
3600-conversion factor in seconds
The meter coefficient of each sensor is filled in the verification certificate by the manufacturer. The k value is set in the matching display instrument. The instantaneous flow and cumulative total can be displayed.
Know more about: Turbine type Flow Meter for Liquid & Gas technology
The physical meaning of the meter coefficient K value of a turbine flowmeter is the number of pulses generated by a unit volume of fluid flowing through the flowmeter. Using the international system of units, the unit of the meter coefficient is (1/m3).
Generally, the K factor will not change when the flow rate changes, but it should not exceed the upper limit of the flowmeter too much. The K factor is a constant based on a flow rate under certain process parameters.
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There are two kinds of different manufacturers k:
One is k=f/Q, that is, the number of vortices generated per unit flow;
The other k=Q/f, that is, the plate flow rate corresponding to each vortex.
The k value is calibrated with the right factory water. The sensor measures the vortex number of the instrument and compares it with the volume flow measured by the calibration device to obtain the k value.
The k value is actually related to the internal mechanical structure of the flow meter measuring tube.
Taking k=f/Q as an example, the formula is as follows:
Where
D-measuring tube diameter
St-Strouhal number, constant within a certain range of Reynolds number
d—-The characteristic width of the vortex generator
m—The ratio of the arcuate area on both sides of the vortex generator to the cross-sectional area of the pipe
In fact, this formula has no practical meaning for you. The values of d and m are difficult to measure accurately. Therefore, it is difficult to obtain an accurate k value by calculation.
Extended reading: Turbine Flow meter Vs Gear Flow meter
Turbine Flow Meter Datasheet
Sino-Inst, as a manufacturer of turbine flow meters, provides customers with high-quality gas and liquid turbine flow meters. For the technical parameters of turbine flow meters, please refer to our Turbine Flow Meter Datasheet.
Turbine flow meter Advantages and Disadvantages
Turbine Meter Advantages
- The cost is moderate.
- Very good at clean, low viscosity fluids of moderate velocity and a steady rate.
- Turndown is very good as it can read very low compared to the greatest flow.
- They are reliable if put in a clean fluid especially if it has some lubricity.
- AGA and API approved for custody transfers.
- They do cause some pressure drop where that may be a factor such as gravity flows.
- High accuracy. Among all flowmeters, it is the most accurate flowmeter.
- No zero drift, good anti-interference ability.
- High accuracy. Among all flowmeters, it is the most accurate flowmeter.
- No zero drift, good anti-interference ability.
Turbine Meter Disadvantages
- Not reliable for steam.
- Bearings wear out.
- Requires constant backpressure to prevent cavitation.
- Accuracy adversely affected by bubbles in liquids.
- Turbine meters can be used with clean liquids and gases only (may need to install a strainer upstream to prevent damage from particulates).
- Not applicable for measuring corrosive fluids.
- May not function properly with high viscosity fluids where the flow profile is laminar.
- Cannot maintain calibration characteristics for a long time.
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Turbine flow meter Applications
Turbine flow meters include liquid turbine flow meters and gas turbine flow meters.
The liquid turbine flowmeter is made of stainless steel and can be used to measure clean and low-viscosity liquids.
Such as water, alcohol, methanol, etc.;
Turbine flowmeter made of all tetrafluoroethylene can be used to measure all corrosive liquids such as acid, alkali, salt solution and so on.
The gas turbine flowmeter is mainly used to measure the instantaneous flow and cumulative flow of general clean gases such as natural gas, air, hydrogen, and nitrogen.
Turbine flow meter for measuring oil
Turbine flowmeters can measure media such as special oils.
There are many types of oils, such as edible oil, peanut oil, diesel oil, gasoline, etc. are all oils. Turbine flowmeters measure the flow of liquids, but it is not recommended to use them for too viscous liquids. Because the turbine flowmeter uses the principle of impeller rotation to measure the flow. And too viscous liquid will affect the rotation of the impeller.
Turbine flow meters can measure low-temperature and non-viscous special oils. If the site of the user’s working condition measurement is a special oil such as high temperature type. It is also impossible to use a turbine flowmeter to measure, and the turbine flowmeter can only measure the working temperature when the site ambient temperature is 160°C.
Flow measurement of some low-viscosity oil products, such as gasoline, kerosene, diesel oil, and flow measurement of heavy oil and residual oil whose viscosity has been reduced by heating.
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Turbine Flow Meter for Cryogenic Liquids – Liquid Nitrogen, Liquid Oxygen
The low-temperature turbine flowmeter is a dedicated liquid nitrogen flowmeter. It can also be used to measure cryogenic liquids such as liquid oxygen.
Liquid nitrogen refers to Liquid with extremely low temperatures. In industrial production, liquid nitrogen can be used as a deep refrigerant. The low-temperature turbine flowmeter is used as a liquid nitrogen flowmeter, which can work at a low temperature of -196°C (-320.8 °F). Liquid Nitrogen Flow Meter’s Turbine sensor structure at ultra-low temperature (-196℃) is made of special customized material. Realize the instantaneous and cumulative flow monitoring of liquid nitrogen.
Quantitative control with turbine flowmeter
Quantitative control system is composed of flow totalizer, turbine flowmeter, solenoid valve and so on. The liquid output can be freely set through the linkage of the equipment. More accurate realization of material ratio. Improve production efficiency in an all-round way.
Its working principle is to provide a flow signal to the control instrument through the flow meter. Set the required quantitative value on the control instrument panel, and when the set quantitative value is reached, the solenoid valve, water pump, etc. will be automatically closed. The solenoid valve and water pump can be controlled at the same time, and can also be controlled separately. It can be widely used in food, pharmaceutical, fermentation, environmental protection, fine chemical and other industries.
Features:
1. Turbine flowmeter for quantitative control
2. Real-time display of flow information
3. Using high-precision impeller, the performance is more stable
4. 304 stainless steel structure, weak acid and alkali resistance, long service life
5. Aviation connector connection, stronger connection, more convenient disassembly
The flowmeter control system is mainly used in workshop batching, water distribution, dispensing, quantitative perfusion and timing and quantitative control of various liquids or gases.
In industrial and agricultural production and life, chemical raw materials such as solid-liquid mixtures (cement slurry, sludge, etc.) Quantitative control system. It can be operated very simply. It can meet the work of a large number of manpower and improve work efficiency.
Frequently
Asked
Questions
Turbine flowmeter is to install a rotor in the circulation channel, when the liquid flows through it will drive the blades to rotate. Then the flow rate is measured according to the number of rotations.
The intelligent liquid turbine flowmeter is a new type of intelligent instrument that integrates the turbine flow sensor and display integration, which is developed using advanced ultra-low power single-chip microcomputer technology. It has the obvious advantages of compact structure, intuitive and clear reading, high reliability, no interference from external power supply, lightning resistance, and low cost.
Use the volumetric tank method to calibrate the turbine flowmeter.
The volume of the standard water tank is determined by filling the standard water tank with water, which is measured by a water tank calibrated and certified by the National Institute of Standards and Technology.
Regularly check the volume of these calibration tanks. Each flow meter and kit are placed in the assembly line, and the calibration tank is filled at five different flow rates within the range of the meter. One round is executed at the maximum rate, one round is executed at the minimum rate, and the three rounds are executed at an equidistant interval between the maximum rate and the minimum rate.
Record the total number of pulses generated by the flowmeter at each flow rate. Divide the total pulse by the total volume at each flow rate to determine the calibration factor. The average factor is determined to be half between the high factor and the low factor.
The flowmeter is marked with an averaging factor. For industrial grade instruments, the maximum deviation between the average coefficient and the upper or lower limit coefficient cannot exceed ±0.5%, and for standard grade instruments, it cannot exceed ±1.0%.
The above is the whole content of how to calibrate the turbine flowmeter. If you have any questions or purchase requirements, please contact Sino-Inst directly.
The principle of Coriolis mass flowmeter mass measurement is Newton’s second law F=Ma. When the fluid flows in the vibrating tube, it will produce Coriolis force proportional to the mass flow.
When there is no fluid flowing, the vibrating tube will not be twisted, and the signals detected by the electromagnetic signal detectors on both sides of the vibrating tube are in phase.
When fluid passes by, the vibrating tube will be twisted under the action of torque, and there will be a phase difference between the two detectors.
The transmitter measures the lag time between the left and right detection signals. This time difference is multiplied by the flow calibration coefficient to determine the mass flow.
The density measurement principle of Coriolis mass flowmeter is that the vibration frequency is inversely proportional to the square root of the fluid density. The fluid density is determined by measuring the vibration frequency.
Therefore, the mass flow meter can realize the measurement of fluid mass flow and the measurement of fluid density.
Flow Metering Principals
- Differential Pressure Flowmeters
- Velocity Flowmeters
- Positive Displacement Flowmeters
- Mass Flowmeters
- For Open Channel Flowmeters – weirs, flumes, submerged orifices, current meters, acoustic flow meters and more
For different working principle, We offer different types of flow meters, like:
- Differential Pressure Flow Meters
- Orifice Plate
- Venturi Tube
- Flow Nozzles
- The Sonic Nozzle – Critical (Choked) Flow Nozzle
- Calorimetric Flowmeter
- Ultrasonic Doppler Flowmeter
- Positive Displacement Flowmeter
- Variable Area Flowmeter or Rotameter
- Velocity Flowmeters
- Pitot Tubes
- Electromagnetic Flowmeter
- Turbine Flowmeter
- Vortex Flow Meter
- Thermal Flowmeter
- Coriolis Flowmeter
- Mass Flowmeters
- Open Channel Flowmeters
More Liquid and Gas Flow Meters
More Flow Measurement Solutions
Sino-Inst, Manufacuturer for Turbine Flow Meters, like: gas turbine flow meter, liquid turbine flow meter, sanitary turbine flow meter, insertion turbine flow meter, steam turbine flow meter, and natural gas turbine flow meter.
Sino-Inst’s Turbine Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
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