TYLAN CORP <TYLN> TO SELL FURNACE PRODUCT LINE Tylan Corp aid it has retained the investment banking firm Kahn and Harris to sell its furnace product line. The company said it has already been contacted by several potential buyers. In 1986, Tylan's furnace product shipments in the U.S. represented 10.3 mln dlrs of the company's total net sales of 28.4 mln dlrs.