Physical Acoustics Corporation (PAC) designs and manufactures, under ISO-9001 quality standards, the World's Only Complete Acoustic Emission (AE) Sensors/Instruments product line. The Company also performs AE Field Testing and Research Contracts worldwide and offers a complementary Nondestructive Testing (NDT) line of Ultrasonic (UT), Eddy Current (ET) and Resistivity products.Also a VALVE LOSS CONTROL SYSTEM for Flare & Steam Valves which we call the VPAC. The VPAC is a two-part system comprised of a state-of-the-art acoustic leak detector as well as a powerful leak quantification algorithm developed by British Petroleum. By using the VPAC system, you can not only identify leaking valves, you can also quantify the actual leak rate of the valves.