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Advantages and Disadvantages of Turbine Flowmeter and Application Notes

The rotation of the shaft can be sensed mechanically or by detecting the motion of the blade. Blade motion is typically detected magnetically, with each blade or embedded metal sheet producing a pulse. Turbine flowmeter sensors are typically located outside of the flow stream to avoid structurally constrained materials if wetted sensors are used. When the fluid moves faster, more pulses are produced. The transmitter processes the pulse signal to determine the flow of the fluid. Transmitters and sensing systems can be used to detect flow in both forward and reverse flow directions.

Advantages and disadvantages of turbine flowmeters:
The cost is moderate. Ideal for clean, low viscosity fluids at moderate speeds and speeds. Turning down is very good because it can read very low maximum traffic. They are reliable if placed in a clean liquid, especially if they are lubricious. AGA and API are approved for custody transfer. They do cause some pressure drop, which can be a factor such as gravity flow. Not reliable for steam.

Turbine meters are used to measure the flow rate of liquids, gases and vapors in pipes such as carbon oxides, chemicals, water, cryogenic liquids, air and industrial gases. High-precision turbine flow meters can be used for the custody transfer of hydrocarbons and natural gas. These turbine flow meters typically include the functionality of a flow computer to correct pressure, temperature, and fluid properties to achieve the accuracy required for the application.

Care should be taken to use the turbine flowmeter when there is no lubrication fluid, as the flowmeter may become inaccurate and fail if the flowmeter wears out prematurely. Some turbine flow meters have grease fittings for non-lubricating fluids. In addition, turbine flow meters designed for specific applications (such as natural gas services) can typically operate over a limited temperature range (eg, up to 60 & ordm; C), so operating at higher temperatures can damage the flow meter.

This flow meter can be used for hygienic, relatively clean and corrosive liquids up to about 24 inches in size. Smaller turbine flowmeters can be installed directly in the pipeline, but the size and weight of larger turbine flowmeters may require the installation of large amounts of concrete foundation and support. Pay due attention to the flow of corrosive liquids, paying due attention to the structural materials of all wetted parts, such as valve bodies, rotors, bearings and fittings.

The application of turbine flow meters can be found in the water, petroleum and chemical industries. Water applications include distribution systems between water zones and waters. Petroleum applications include the custody transfer of hydrocarbons. Other applications can be found in the food and beverage and chemical industries

Where is the industry used?
Arranged in descending order, these are used in oil and gas, water and wastewater, gas utilities, chemicals, electricity, food and beverage, aerospace, pharmaceutical, metal and mining, and pulp and paper.

Turbine flowmeter application notes:
Since the rotor/bearing resistance slows down the rotor, the turbine flow meter is less accurate at low flow rates. Be sure to operate these flowmeters above approximately 5% of maximum flow. Turbine flowmeters should not operate at high speeds due to premature bearing wear and/or damage. Be careful when measuring unlubricated fluids, as bearing wear can cause the flowmeter to become inaccurate and fail. In some applications, bearing replacement may require regular execution and increased maintenance costs. Dirty fluids should generally be avoided to reduce the possibility of flowmeter wear and bearing damage. In summary, the moving parts of the turbine flow meter degrade over time and use.

Sudden flow from the gas to the liquid should be avoided as they can cause mechanical stress to the flow meter, reduce accuracy and/or damage the flow meter. These conditions usually occur under filling piping and plug flow conditions. Two-phase flow conditions can also cause turbine flowmeter measurements to be inaccurate.

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