Rotary Unions

Rotary Unions play a crucial role in enabling continuous operation of rotating equipment by facilitating the transfer of fluids or power without the need for hoses or cables.

Commonly referred to as Rotary Joints or Swivel joints, are mechanisms used to transfer fluids - whether that be air, water, oil, or hydraulic fluid - or electrical power from a stationary source to a rotating part, typically one that requires continuous rotation.

In Short

• Rotary Unions are designed to maintain a seal between the stationary and rotating parts to prevent leaks and ensure the smooth flow of fluid/power.
• They are typically made from materials that can withstand the pressure, temperature, and chemical conditions of the fluid being transferred.
• Common applications include industrial machinery (such as printing presses, wind turbines, and packaging machines), construction equipment, and rotary indexing tables.

How They Work

Fluid Transfer: In industrial applications, a Rotary Union allows fluids to pass between stationary pipes and hoses and rotating equipment such as a drum, cylinder, or shaft. This is achieved through a sealed connection that rotates with the equipment.

Electrical Power: Rotary Unions can also be used to transfer electrical signals or power across rotating interfaces. Most commonly seen in slip rings.