Coriolis Flow Meter Pressure Drop

Annubar flow meter are sometimes referred to as Averaging pitots and contain multiple pressure tappings to average the flow. As soon as the pressure recovers above the vapour pressure the bubbles impode.

Coriolis Principle Tek Trol

A vortex meter primary flow element produces a series of oscillations of pressure.

. The averaging pitot tube is inserted across the pipe as shown below. For example an orifice plate produces a pressure drop that is a function of the square of the volume rate of flow through the orifice. With Coriolis mass flowmeters the fluid runs through U-shaped tubes vibrating in an angular harmonic oscillation.

Coriolis flow meters are very accurate better than 01 with a turndown rate of more than a. Consequently liquids near boiling point could introduced cavitation as the pressure across the meter drops below the vapour pressure of the liquid forming of vapour bubbles. Meanwhile from the measurement function because there is no rotating sensor part it is very suitable for those who do not want excessive pressure drop due to the installation of a flow meter.

Generally the physical property generated by the primary flow element is more convenient to measure than the flow itself. Magnetic flow meter accuracy Magnetic flow meters have a fairly good accuracy of 05 or better for the inline type and 1 2 for the insertion type. U and Ω shaped coriolis meters cause pressure drop as the flow is increased resulting in permanent pressure loss.

The tubes deform and an additional vibration component is added to the oscillation which causes a measurable phase shift in the tubes. This is to try to compensate for a non-ideal flow profile.

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