Aramark Corp. will sell a business that provides management services for clinical equipment at more than 500 hospitals and other clinical facilities for $300 million, the Philadelphia company announced Monday.

Selling Aramark Healthcare Technologies is part of an effort to trim Aramark's collection of businesses to focus on core food, uniforms, and facilities-management operations, the company said. The unit, based in Charlotte, N.C., and owned by Aramark since 2001, employs 1,500 technicians, engineers, and others.

The buyer is a company called Trimedx, in Indianapolis, Ind.

Aramark said it will use most of the proceeds from the sale to reduce debt and buy back $50 million of its own shares. The company had $7.8 billion in long term debt at the end of June.