Grainger carries rotary joints, or unions, that are used to transfer liquids or gases while rotating or swiveling from one connection to another. Rotary unions can endure a wide range of temperatures and pressures in a variety of environments. Shop here for single-, dual- and single-or-dual-flow rotary joints with right-hand or left-hand rotation. Choose from numerous sizes. Come to Grainger for high-quality rotary unions.