Wafer Style Vortex Flow Meters [VX]

Wafer Style Vortex Flow Meters [VX]

Principles of Operation

Vortices are created when a fluid passes around a bluff body as shown in illustration (click Images Tab above). Vortices are alternately shed on each side of the body, 180 degrees out of phase to each other, resulting in an oscillating pressure gradient. As flow increases the frequency of vortices increases in proportion to the increased flow thereby creating a linear relationship.

General Description

Constructed of type 304 or 316 stainless steel, wafers may be installed in-line by customer provided or built-in flanges. Key pad or communication interface functionalities include Measuring units, programmable flow alarm, two programmable totalizers, programmable flow rate pulse output, two programmable optically isolated outputs, battery backed real time clock (RTC), digital communication interface (RS-232 or RS-485), programmable diagnostic events log and register with date and time stamp, programmable process variable log with date stamp, calibration and flowing fluid parameters adjustment, extensive diagnostics.

Aalborg's unique dual signal processing technology independently measures each vortex on either side of the bluff body and filters out non-flow noise. This results in less noise and higher accuracy throughout the flow range.

Local 2x16 LCD readout provides flow rate and total flow volume reading in selectable engineering units, diagnostic events indication and feature a password protected access to the process parameters to ensure against tampering or resetting.

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