Turbine flowmeters measure the average velocity of the flowing stream and this requires that the velocity profile of the fluid stream be symmetrical across the internal diameter of the flowmeter body when it engages the rotor. In order to assure that the flowing stream’s velocity profile is symmetrical, it is necessary to provide straight runs of pipe into and out of the flowmeter. For most applications, a length equal to 10 diameters of the nominal turbine meter inlet size upstream and 5 diameters of the nominal turbine meter inlet size downstream of the meter are adequate to assure this condition.
For flowmeters with nominal inlet piping sizes less than 1″, 10″ of upstream and 5″ of downstream straight piping are recommended. For applications requiring the best accuracy, such as custody transfer or legal-for-trade, a flow straightening tube bundle in the upstream section is normally required to eliminate any rotation of the flow stream about its axis of flow. Hoffer offers a complete line of installation kits and flanged flow straightening sections that provide the required straight runs of piping in and out of the flowmeters as an option and meet API and AGA design criteria for custody transfer applications as well.
About Hoffer Flow Controls Turbine Flowmeters
For over forty-five years Hoffer Flow Controls has been designing and manufacturing quality turbine flowmeters and related process instrumentation. Hoffer Flow Controls specializes in cryogenic flowmeters, magnetic flowmeters, ultrasonic flowmeters and electronic flowmeters. We have expanded our product line to include but not limited to; Aerospace flowmeters, Oil and gas flowmeters, Industrial custody transfer flowmeters, Gas and liquid flowmeters (Power generation), WFI water flowmeters, Sanitary flowmeters, Military grade flowmeters and Subsea flowmeters.
Hoffer Flow Controls is committed to the quality system established by ISO 9001 that ensures our ultimate success by continually satisfying customer needs, improving performance, and making us competitive in the world market.