Duff-Norton (Charlotte, NC) offers the 1900 Series Rotary Union® that provides a rotating seal between fluids and a revolving roll or drum. Commonly conducted media are water, hot oils, chemicals, hydraulics, and air. The union is designed for very high pressure applications to 10,150 psi, and with maximum temperature ratings to 248 °F. Standard models feature nickel-treated carbon steel or stainless steel construction, and a double-acting thrust bearing and bronze bushing. Sizes range from 1/4 to 3".