Selas Heat Technology Co. LLC completed the purchase of Red-Ray Manufacturing Inc., a portfolio company of Osage Industries, and Ensign Ribbon Burners LLC, a privately owned business. Red-Ray manufactures high-intensity gas-fired infrared burners, pre-mix air-gas delivery systems (including the patented Redi-Pak® system) and ignition controls. ERB Ensign manufactures ribbon burners, air-gas mixing systems, and ignition and safety controls. Between the two product lines, applications served include the powder-coating, glass, wire and metal industries. Selas has completed five acquisitions over the past four years in an effort to expand its technology portfolio.