Rotary Unions /
Hydraulic Rotary Swivels

A Rotary Union or Hydraulic Rotary Swivel, often referred to as Rotary Swivel Joints, are precision-engineered components designed to smoothly transfer media from a stationary source to a rotating piece of machinery. At UEA, we refine our rotary union and hydraulic swivel designs using state-of-the-art software technology and thorough in-house testing. Each swivel we produce is custom-built to meet your specific needs, ensuring it fits the unique requirements of your application.

• Standard and custom designed rotary unions for your specific application
• Accommodating a wide range of diameters and flow requirements
• Up to 5,500 PSI (37,921 kPa)
• Media types: oil/hydraulic, air/gas, water, and coolant
• SAE ORB, BSPP and NPT
• Painting, nickel plating and heat treatment
• Temperature range: -20°F to 250°F (-29°C to 121°C)
• In-house endurance test stand for accelerated life testing
• Fabricated by state-of-the-art CNC machines

UEA can produce a large variety of rotary union sizes to meet various needs and applications. Factors that dictate rotary union size: center through-hole size; a liquid tight cord grip; the number, pressure rating, and size of ports.

For specialized requirements, our rotary unions can be engineered with multiple flow passages and can include features like integrated UEA Slip Rings for simultaneous transfer of power and data. This flexibility in design allows for direct integration into existing equipment, optimizing space and improving efficiency in industrial setups.

Facilitates the transfer of fluids or gases across rotating interfaces within industrial machinery or equipment. Engineered for versatility, these compact rotary unions offer durable performance in a small footprint.

• Compact design
• Overall length: Up to 14”
• Number of passages: 1 to 6

Catering to the demanding requirements of large-scale industrial applications and machinery. These mid-size rotary unions provide reliable fluid transfer for medium-scale machinery, balancing a solid build with efficient design.

• Mid-size adaptability
• Overall length: 14” to 26”
• Number of passages: 6 to 14

Large-scale rotary unions provide maximum durability and high-volume fluid transfer capacity. Perfectly suited for heavy industrial applications to deliver consistent performance. Interfaces in heavy-duty industrial settings, ensuring optimal performance and reliability.

• Heavy industrial applications
• Overall length: 26” and up
• Number of passages: 8 and up

At United Equipment Accessories (UEA), we specialize in integrating slip rings into our rotary unions, providing a seamless solution for the simultaneous transfer of power and data. By incorporating integrated slip rings, our rotary unions ensure optimized space utilization and enhanced efficiency, making them an ideal choice for complex industrial setups. This integration not only enhances the functionality of your equipment but also boosts its overall performance.

• Integrated Slip Rings: UEA’s rotary unions can be equipped with integrated slip rings, facilitating the concurrent transfer of power and data.
• Optimized Design: Our adaptable designs ensure easy incorporation into existing equipment, optimizing space and boosting efficiency in industrial applications.
• Enhanced Efficiency: The combined integration of rotary unions and slip rings enhances operational efficiency and maximizes the utilization of available space.

Combining a slip ring with a rotary union, these fully integrated units enable simultaneous transmission of electrical signals and fluid media. They are perfect for streamlined operations in complex machinery. The slip ring sits within the steel housing of the rotary union and is sealed with a steel top plate.

• Compact integrated design
• Fewer parts with secure sealing
• Very rugged enclosure

These units offer the flexibility of separate slip rings and rotary unions with partial integration. They are suitable for systems where close proximity is necessary but complete integration is not feasible, providing versatile performance with simplified maintenance. The base casting of the slip ring sits directly on top or bottom of the rotary union.

• Reduced height with flexible integration
• Maintenance accessibility
• No mounting tube

For systems requiring distinct slip rings and rotary unions, these separate units allow for customized placement. Ideal for complex setups where modular assembly and easy access to individual components is needed. The slip ring and rotary union, while serving distinct functions, are independent components within a system.

• Modular assembly and easily separated
• Suitable for complex setups
• Reduced heat transfer between units