Flow Measurement Technical Tips

NEW: Turbine Flowmeters and Pipe Threads

When employing precision turbine flowmeters, it is best not to use NPT fittings on the meter or upstream of it.

Flow Range Affect on Cost and Performance

When specifying the flow range for your turbine flowmeter application, a more detailed description may reduce the cost of calibration and/or increase the accuracy of measurement. In a flow application, the expected flow range is the first thing considered to "size" the meter.

Helical Dual Rotor Performance

Although several versions of dual-rotor turbine flowmeter technology have been patented, only a few have been successfully marketed. One version uses two rotors rotating in the same direction. The front rotor is the primary element and the rear rotor is referred to as the sensing rotor.

Importance of Fluid Properties

When identifying the fluid for your turbine flowmeter application, be as specific as possible. In specifying a flowmeter, one of the most basic considerations is the type of fluid being measured.

Operating Temperature Range vs. Turbine Meter Costs

When specifying the temperature range for your precision turbine flowmeter application, a more detailed description may reduce the cost of the meter and/or its calibration.

Passivation of Austenitic Stainless Steels

Passivation is required to maximize the natural corrosion resistance of the stainless steel. This is critical when turbine flowmeters are used in water or other corrosive fluid applications.

Secured Internals Key to Repeatability

The repeatability of a turbine flowmeter not only requires high quality bearing systems, but the rotor and supports also need to be rigidly mounted into the housing. The internals contribute to the flow profile, which imparts a force on the rotor.

Understanding Helical Rotor Performance

There are many reasons for selecting helical rotors over that of flat-bladed rotors. The helical blade transfers energy more efficiently from the flow stream to the rotor, producing a faster speed of response to flow changes.

Flow Measurement White Papers

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Determining Factors for Turbine Flowmeter Bearing Life

In the field of flow measurement, several important factors can cause accuracy concerns leading to premature flowmeter calibrations or bearing replacement. Precision turbine meter users need to understand the proper techniques to ensure their instrument will maintain its calibration over the intended period of use.

Modern Turbine Flowmeter Enhancements

Even though liquid turbine flowmeters have existed for several decades, there have been many enhancements, such as dual–rotor technology, bearing materials, embedded flow computers and improved methods of mechanical installation of supports and rotors, which offer impressive flow performance. These enhancements enable the modern turbine flowmeter to accomplish applications that were not possible in the past, while offering additional critical flow data and performance. The modern precision turbine flowmeter remains one of the most reliable and accurate flow sensor devices for today's critical flow measurements.

Single Fluid Universal Viscosity Curve: A Concept Not Always Used or Understood by Calibration Laboratories

Are you or your calibration laboratory performing unnecessary calibrations on your turbine flow meters? You may be if you don’t understand the concept of the Single Fluid Universal Viscosity Curve.

Flowmetering Articles

Understanding Your Choices In Flowmeter Calibration

Across various industries, the performance of a flow measurement device is ultimately dependent upon the proper functioning of its sensors or other signal-producing elements, which have an active relationship with the flowing fluid. In order to be confident that a meter is accurately measuring the flow volume or mass, it must be recalibrated on a periodic basis.