Patent ID: 8230877
Filing Date: 2012-07-31
Classification: G01F,G05D,Y10T

Abstract:
1. A dosage system for feeding a fluid to a static mixer, said system comprising: a tank containing said fluid at a predetermined pressure and a pressurizing element; a fluid passage connecting said static mixer and said tank; a scale detecting the weight of fluid contained in said tank, a modulating control valve provided within said fluid passage which controls the flow rate of said fluid from said tank into said static mixer; a controller for receiving a target flow rate of said fluid, and an actual flow rate of said fluid; and for outputting a control signal to said control valve indicating a valve position to adjust the actual flow rate from a first actual flow rate greater than zero to a second actual flow rate greater than zero; and a flow estimator outputting said actual flow rate to said controller based on said weight of said fluid as detected by said scale at different points of times.