A rotary Union, Rotary Joint or Swivel is a mechanical device that allows the transfer of fluids and/or gases to and from rotating equipment. They are utilized in machinery that requires a constant flow of lubrication, air, water or other liquids during rotation.
A slip ring is a device that allows the transfer of electrical power, signals and data to and from rotating equipment.
Rotary union technology contains elements such as mechanical seals, Teflon seals, hydrostatic seals and integrated or stand-alone electrical slip rings. The demands and uses of rotary unions and slip rings are vast, which is why standard and custom built assemblies are available in numerous material, seal and passage size options.
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