Duff-Norton manufactures Rotary Unions and Swivels in single and multi-port configurations. Rotary Unions are also known as rotary joints, rotating joints, and rotating unions.Rotating joints are used to transfer media from a stationary supply to a rotating component such as a drum or a rollSpecifications: Pressure - 10, 000 psi max Temperature - 600 degrees F max Speed - 3, 500 RPM max Sizes - 18" to 12" maxMedia: Water steam hot oil hydraulic fluid non toxic - non flammable gasesPrimary Industries: Chemical printing rubber metals textiles plastics food paper machine tools building materials construction equipmentBasic Applications: Provide heating or cooling media to control the surface temperature of a drum or roll, transfer air or hydraulic fluid to moving components, add fluids to mixers while in motion