Burkert has expanded its 8070/8071 range of positive displacement flow meters for the measurement of high viscosity fluids such as glue, honey and oil.
The range now extends from 1/8in to 4in, providing metering with high levels of accuracy (euro°Â¤0.5% FS) for difficult-to-measure fluids with viscosities up to 1m centipoise.
The 8070/8071 flow meters are unaffected by the problem of high viscosities encountered with paddle wheel type flow meters, the company says. Instead, they are designed with a pair of meshed (geared) oval rotors that rotate under fluid pressure in an engineered measuring chamber. This arrangement, with precision stainless steel or PPS gears and FKM seals as standard, is characterised by its reliability, its ability to be used on horizontal, vertical and gravity applications, and its accuracy, the company adds.
In addition, the meters can be used with membrane pumps and have only a minimal pressure drop: up to 0.5 bar when correctly sized.
Precise sensing of flow on the 8070/8071 is accomplished via magnets in the geared rotors. These actuate switches as they rotate and generate pulses, with each pulse equating to a known volume of fluid. These flow meters are available with the choice of aluminium, PPS, or stainless bodies. They can be rated up to IP65 and operate at temperatures up to 800ºC with standard PPS rotors. Optional higher temperature rotors can extend operation to 1,200ºC.
Each 8070/71 flow meter is supplied with its own traceable metrology calibration report.
Burkert
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