Duff-norton, usa, manufactures general purpose rotary unions/joints, series 9000, supplied by kingsley industrial ltd, equipment division. Their unique design enables them to be used to set up heating or cooling agents into rolls or cylinders in various types of machinery. Models are available to handle steam, water, heat transfer oils, proprietary thermal fluids and other liquids and non-toxic industrial gases. Operating parameters are sealing pressure to 250 psi, speeds to 750 rpm and temperatures to 375°f.
