Rotary Joints - Brass & Steel, 1/4 To 3 Inch Size Range, Up To 5000 Psi Pressure, Up To 2000 Rpm Speed | Durable, Easy Install, Leak-proof Seal, Versatile Fluid

A rotary union is a union that allows for a rotation of the united parts. It is thus a device that provides a seal between a stationary supply passage (such as pipe or tubing) and a rotating part (such as a drum, cylinder, or spindle) to permit the flow of a fluid into and/or out of the rotating part. Fluids typically used with rotary joints and rotating unions include various heat transfer media and fluid power media such as steam, water, thermal oil, hydraulic fluid, and coolants.[2] A rotary union is sometimes referred to as a rotating union, rotary valve, swivel union, rotor seal,[3]rotary couplings, rotary joint, rotating joints, hydraulic coupling, pneumatic rotary union, through-bore rotary union, air rotary union, electrical rotary union, or vacuum rotary union