COLORADO SPRINGS, CO (May 1, 2012) – Velcon Filters, LLC, a  manufacturer of industrial filtration systems, today announced that it has acquired Warner Lewis GmbH. Velcon is a portfolio company of The Sterling Group, a middle market private equity firm based in Houston, Texas, and was acquired in 2009 as a platform to execute a buy-and-build strategy. Headquartered in Kelsterbach, Germany with locations in Phillipsburg, Germany; Farnborough, UK; Paris, France; and Dubai, UAE; Warner Lewis offers aircraft refueling solutions to customers in Europe, the Middle East and Africa (“EMEA”).  Warner Lewis has been a strategic business partner of Velcon for over 40 years distributing Velcon’s line of products, in addition to manufacturing its own standard or custom vessels, pit-boxes and …