DAVIDSON: Ingersoll Rand Inc. (NYSE: IR), a global provider of mission-critical flow creation and industrial solutions, has acquired G&D Chillers, Inc. and Advanced Gas Technologies Inc. (AGT) for a combined $27 million to expand its air treatment portfolio. G&D, a U.S.-based manufacturer of premium glycol chillers used in breweries, wineries and food processing, strengthens Ingersoll Rand’s engineering…