The products are also known as rotary swivels, rotary couplings, rotary joints) are precision mechanical devices used to transfer fluid from a stationery source, such as a supply pipe, into a rotating piece of machinery.

A typical rotating union features:
Ball bearings to support the rotating component (attached to the machinery) against the stationery component (attached to the stationery supply source)

Mechanical seal to seal the media passing through the rotating union

Rotating Joint are used in numerous manufacturing processes to cool, heat or transfer fluid (pneumatic or hydraulic) power.

Rotating Union applications include Air Clutches, Gear Boxes, Machine Tool Spindles, Textile Equipment, Rubber & Plastic Manufacturing Machinery, Steel Continuous Casting Machines, Paper Machine Calender stacks, Paper Machine Dryer Cans, etc.