A U.S. Patent for “Method and System for Leak Testing” was awarded to Pall on September 24th, 2019. The present invention is a method of leak testing a flexible expandable bag having at least one port and at least one flexible wall in a system comprising: a gas flow meter; a gas pressure regulator; a gas pressure transducer; a gas pressure relief valve; a displacement measurement sensor, arranged to measure displacement of the flexible wall of the bag as the bag expands while being filled with gas; at least three valves, each valve being controllable to allow or prevent gas flow therethrough. Learn More