What is a Rotary Union?

A rotary union or swivel joint is a mechanism used to transfer fluid (under pressure or vacuum) from a stationary inlet to a rotating outlet, preserving and isolating the fluid connection.

Also referred to as rotary joints, rotary couplings,fluid swivels or swivel joints; rotary unions are engineered to endure a large range of temperatures, pressures and speeds for a variety of conditions and environments.

Rotary unions typically function by connecting to an input and securing onto another mechanism while allowing a moving connection to be preserved.

Rotary unions are utilized in a wide range of applications; from miniature rotary unions for the semiconductor industry, to large and rugged-duty rotary unions for industrial applications.