Patent ID: 7007707

Claim:
A system for dividing a single mass flow, from a system inlet into two or more secondary flows through two or more secondary flow lines in accordance with a preselected ratio of flow rates through the secondary flow lines, comprising: A) the system inlet adapted to receive the single mass flow; B) at least two of the secondary flow lines connected to the inlet, each secondary flow line including, a flow meter measuring flow through the secondary flow line and providing a signal indicative of the measured flow, and a valve controlling flow through the secondary flow line based upon a signal indicative of desired flow rate through the secondary flow line; C) a user interface adapted to receive the setting of the preselected ratio of flows; and D) a controller connected to each of the flow meters, and the valves of the secondary flow lines, and the user interface, and programmed to, receive through the user interface, the setting of the preselected ratio of flows through the secondary flow lines, receive the signals indicative of measured flow from the flow meters of each of the secondary flow lines, calculate an actual ratio of flow through the flow lines based upon the measured flow, wherein said calculation is made without reference to the total flow received at the inlet, nor to the sum total of the secondary flows through the secondary flow lines, compare the actual ratio to the desired ratio, calculate the desired flow through at least one of the flow lines if the actual ratio is unequal to the desired ratio, and provide a signal indicative of the desired flow to at least one of the valves.