Rotary Unions for
Off-Road Vehicle Systems

At Penlink, we specialize in designing rotary unions for off-road vehicles operating in the most challenging conditions. Our rotary unions ensure reliable, leak-free transfer of hydraulic fluid, air, or coolant between stationary and rotating components—critical for maintaining system integrity in mobile platforms exposed to vibration, shock, and environmental contaminants.

Technical Excellence
in Every Rotation

Our rotary unions are engineered to meet the rigorous demands of off-road applications, including:

Handles High Pressure: Built to work with hydraulic systems up to 10,000 psi—ideal for steering, suspension, and heavy-duty attachments.
Multiple Fluid Paths: Available in single, dual, or multi-channel designs to support systems like CTIS and brake cooling.
High-Speed Ready: Operates smoothly at speeds up to 5000 RPM with precision bearings and low-friction seals.
Leak-Free Sealing: Uses advanced seals made from carbon, ceramic, or elastomers to prevent leaks and extend service life.
Built to Last: Made from corrosion-resistant materials like stainless steel and anodized aluminum for long-term durability in tough environments.

Rotary Unions for Off-road Vehicles

7000 Series Swivel

Versatility and Performance in Every Turn

Built for demanding environments, the 7000 Series Type 2 Swivel delivers unmatched reliability across a wide range of media. From water and steam to hot oil and chemicals, this swivel excels under diverse conditions, offering optimal performance for every application.

700 Series Swivel

Efficient and Durable Dual-Port Swivel for Specialized Applications

The 700 Series Swivel is designed to handle demanding applications with reliability and precision. Its innovative dual-port configuration and durable materials make it an excellent choice for industries requiring smooth and efficient fluid transfer.

200 Series Swivel

Reliable Solutions for Steam, Water, and Hot Oil

Engineered for versatile and demanding applications, the 200 Series Swivels provide exceptional performance and durability. Designed for steam, water, and hot oil, these swivels are available in sizes from 1/2″ (DN15) to 2″ (DN50), making them a versatile choice across industries.

100 Series Swivel

Lightweight and Efficient Fluid Transfer Solutions

The 100 Series Rotary Unions are engineered to provide efficient and reliable performance in demanding industrial applications. Designed to handle pneumatic, vacuum, and hydraulic mediums, this series is the ideal choice for industries requiring precision fluid transfer with a focus on durability and efficiency.

20 Series Swivel

Solutions for Air, Hydraulic, and Vacuum Applications

The 20 Series Rotary Joints are designed for air, hydraulic, and vacuum applications. They feature a port size range from 1/8″ (DN06) to 3/4″ (DN20), with 2 to 4 ports as standard. The self-supported design ensures durability, and the radial hose connections on the housing come as standard.

10 Series Swivel

Axial and Radial Models for Versatile Media Transfer

The 10 Series Swivel is designed to deliver reliable performance across a wide range of industrial applications. Available in two main models—axial and radial—this product offers flexibility with sizes ranging from 1/8″ to 1″ and configurations supporting 2 to 12 passages.

Applications in
Off-Road Platforms

Our rotary unions are integrated into a wide range of off-road vehicle systems, including:

Central Tire Inflation Systems (CTIS): Maintain optimal tire pressure dynamically for improved traction and reduced wear.
Hydraulic Steering and Suspension: Enable precise control and articulation in articulated haulers, forestry machines, and military vehicles.
Rotating Implements and Attachments: Power rotating tools and accessories on construction and agricultural equipment.
Brake and Drivetrain Cooling: Circulate coolant to high-heat components in heavy-duty braking systems.

Rotary Unions
+ Slip Rings

For systems requiring both fluid and electrical transmission, we offer combined rotary unions and slip rings—a compact, integrated solution for power, signal, and fluid transfer in one rotating interface.

Let’s Talk Off-road Performance

Need help selecting the right rotary union for your off-road vehicle system? Our team is ready to assist with product selection, customization, and integration support—whether you’re optimizing a CTIS, hydraulic suspension, or cooling system.