Patent ID: 7810516

Claim:
A method for controlling the pressure of a fluid in a bulk fluid distribution system having a first vessel and a second vessel for supplying the fluid to a supply line, an inert gas source for supplying an inert gas to the first and second vessels, a controller and a sensor positioned in the supply line comprising the steps of: receiving at the controller a control signal from the sensor; initiating a dispense cycle of the first vessel comprising the steps of: determining a first signal from the control signal and a change in head pressure of the fluid between a first level and a second level of the second vessel; applying a first pressure to the fluid in the first vessel based upon the first signal; and dispensing the fluid from a first level to a second level of the first vessel; and initiating a dispense cycle of the second vessel comprising the steps of: determining a second signal from the control signal and a change in head pressure between the first level and the second level of the first vessel; applying a second pressure to the fluid in the second vessel based upon the second signal; and dispensing the fluid from the first level to the second level of the second vessel.