Sentinel Capital Partners has announced the sale of Chase Doors, a manufacturer of made-to-order impact traffic doors and specialty door systems, to Audax Group. As part of the deal, management will retain an equity stake. Founded in 1932, Chase Doors has more than 300 employees and five vertically integrated manufacturing facilities. Sentinel backed it in December 2010, helping double revenue and triple EBITDA during the holding period. Golub Capital provided financing to support the acquisition, acting as sole bookrunner, sole lead arranger and administrative agent.