4-Port Rotary Union | Hydraulic Swivel | Standardized Design

For hydraulic systems that go beyond basic supply and return lines, a 4-port rotary union provides the added capacity needed to manage multiple functions through a single rotating connection. This configuration is commonly used when equipment requires additional circuits such as auxiliary functions, case drain lines, or dual-pressure paths operating at the same time.

Built on a standardized swivel body, this design gives engineers flexibility without starting from scratch. Multiple mounting hole patterns are integrated into the housing, making it easier to align with existing equipment layouts or custom mounting solutions like torque arms and adapter plates.

Unlike simpler two-line configurations, the 4-port rotary union allows four independent hydraulic passages to operate simultaneously. This makes it a practical choice for more advanced machinery where multiple hydraulic actions must occur during rotation without adding extra components or increasing hose routing complexity. Each unit includes SAE ORB ports and is designed specifically for hydraulic fluid systems.

Where a 4-Port Design Fits

• Equipment requiring more than basic pressure and return lines, where multiple hydraulic functions must pass through a rotating joint
• Commonly used in cranes, excavators, and drilling rigs with auxiliary circuits or additional attachments
• Ideal for rotating platforms and material handling systems with integrated, multi-function hydraulic operation

Models shown below are engineered specifically for hydraulic fluid compatibility.

Key Features & Benefits

• SAE ORB ports provided on all four connections for compatibility with standard hydraulic systems
• Multiple bolt pattern options allow flexible mounting across different equipment designs
• Mounting plates can be customized upon request to match specific application requirements
• Designed to maintain consistent hydraulic flow across multiple circuits in high-pressure applications
• Internal sealing system supports pressure retention and helps prevent fluid loss during operation
• Suitable for use in mobile equipment, industrial machinery, and multi-function hydraulic systems