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Pressure Drop

The pressure drop for the coriolis mass flow controller (ΔP) at maximum flow rate, pressure and temperature is notmore than 0.13 MPa for water.

For the measurement flow of liquids it is important to consider the cavitation effect (liquid boiling), which may occur in certain conditions of the flow. Cavitation may cause the coriolis controller work abnormally. To prevent this, it is important to maintain the pressure at the distance of 5*DN after the coriolis flow controller. That pressure must not be less than the critical pressure (Рcr) calculated as

Рcr = 2.9 ΔР + 1.3 рν ,  kPa        (1.6)

where ΔP – pressure drop on the coriolis gas flow meter, kPa;

          рν – saturated steam pressure at working conditions (background information), kPa.

If the pressure calculated by this formula exceeds the actual pressure in the pipeline, a safety valve should be installed to increase the pressure.

Please refer to following pressure drop graphics before engineering design and application Note: µ=cP(Viscosity)

Model: TFM 1001-T Size in 1/8 inch (3mm)

Model: TFM 1001-T Size in 3/8 inch (10mm)

Model: TFM 1001-T Size 1/2 inch (15mm)

Model: TFM 1001-TSize 1 inch (25mm)

Model: TFM 1001-T Size 1-1/2 inch (40mm)

Model: TFM 1001-U Size 2 inch (50mm)

Model: TFM 1001-U Size 3 inch (80mm)

Model: TFM 1001-U Size 4 inch (100mm)

Model: TFM 1001-U Size 6 inch (150mm)

Model: TFM 1001-U Size 8 inch (200mm)

Typical accuracy, turndown, and pressure drop with Model: TFM 1001-M size 2 inch(50mm)


Turndown from Max. flowrate 20.01 15.01 10.01 1.05.01 1.01
Accuracy +/-% 0.2 0.2 0.1/0.05 0.1/0.05 0.1/0.05
Pressure drop 0.001 0.0015 0.002 0.1 0.17
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