In continuation to the types of Flow Measurement, Differential Pressure Flowmeter is detailed here.
DIFFERENTIAL PRESSURE (DP) FLOWMETER
â€¢ Most common flowmeter technology and is used to measure volumetric flow rate of most liquids, gases and vapors including steam.
â€¢ DP flowmeters have no moving parts and are easy to use.
â€¢ They create a non recoverable pressure loss and lose accuracy when fouled.
â€¢ Flow measurement accuracy depends on accuracy of the pressure gauge.
PRINCIPLE OF DP
â€¢ DP Flowmeter uses the Bernoulli equation which describes the relationship between pressure and velocity of a flow.
â€¢ These devices guide the flow into a section with different cross section areas (different pipe diameters) that causes variations in flow velocity and pressure.
â€¢ By measuring the changes in pressure, the flow velocity can then be calculated.
TYPES OF DP FLOWMETERS
â€¢ Orifice Plate
â€¢ Venturi Tube
â€¢ Segmental Wedge
â€¢ Pitot Tube
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