Abstract: A pressure control system for controlling the pressure of a process fluid stream at a certain location, comprising: a pressure regulator disposed in the process fluid stream, through which the process fluid stream flows; a first pilot controller adapted to sense the pressure of the process fluid at the said location and receive a control pressure from a control source; a second pilot controller adapted to receive same control pressure from the control source and provide added pressure; an inspirator adapted to receive the added pressure from the second pilot controller and generate a differential pressure; wherein the differential pressure is used to control the pressure of the process fluid stream within the pressure regulator. The pressure regulator comprises a first chamber and a second chamber therein separated by a flexible element and a divider is disposed in the first chamber and operative to abut against the flexible element to divide the first chamber into separate spaces.

Abstract: A mobile power supply system for use in vehicles, and components of the mobile power supply system. The power supply system is a regenerative fuel cell system. The system combines a fuel cell unit, an electrolyzer unit, and a hydrogen storage unit. Design improvements over known regenerative fuel cell systems are incorporated into the system of the present invention.