Rotary Unions for Every Industry
From Standard to Custom Solutions — Engineered for Performance and Precision
At Penlink, we offer a comprehensive range of rotary unions designed to meet the diverse demands of modern industry. Whether you’re working in factory automation, marine and offshore, defense, off-road vehicles, or high-pressure systems, our rotary unions deliver reliable, efficient, and leak-free media transfer—even in the most challenging environments.
Our solutions range from standard single-passage designs to custom-engineered multi-passage rotary unions, capable of transferring multiple media types simultaneously. We support a wide variety of fluids and gases, including water, steam, hot oil, chemicals, air, and hydraulic fluids, across a broad spectrum of pressures, temperatures, and rotational speeds.
- Rotary Unions for Factory Automation: Precision-engineered for robotics, CNC machines, and automated production lines.
- Rotary Unions for Marine & Offshore: Corrosion-resistant designs for winches, turret swivels, and subsea systems.
- High-Pressure Rotary Unions: Built to withstand extreme pressures in hydraulic systems and heavy-duty machinery.
- Rotary Unions for Off-Road Vehicles: Rugged solutions for construction, mining, and agricultural equipment.
- Rotary Unions for Defense Applications: MIL-SPEC compliant designs for radar systems, turrets, and mobile platforms.
Versatile, Reliable, and Ready for Your Application
Contact us today to learn more or request a quote—either by filling out the form or by emailing us at info@penlink.se.
Our rotary unions are ideal for:
- Hydraulic and pneumatic actuation
- Heat transfer in molding and extrusion
- Cooling and lubrication in machining
- Chemical and fluid transfer in processing systems
Whether you need a standard off-the-shelf solution or a customized rotary union tailored to your system, our engineering team is ready to help.
Frequently Asked Questions
What is a Rotary Union?
A rotary union (or swivel joint) is a device used to transfer fluid under pressure or vacuum from a stationary inlet to a rotating outlet, preserving and isolating the fluid connection.
How do I choose a rotary union?
Proper selection of a rotary union solution requires details about your application’s operating parameters including pressure, speed, media type(s), number of flow passages (channels), and connection size(s)/type(s).
A good place to start your search is with our Standard Rotary Unions. If you are confident that a custom / modified solution is most likely required or need assistance in your selection, contact us to get started. Our sales team is here for you.
Can your standard rotary unions be modified to meet the requirements of my application?
We can modify our standard rotary unions to fit your needs. Custom modifications to our standard products are quite common and easier than you may think. Modifications include changes to housing / shaft dimensions and materials, seal types, mounting configurations, connection sizes and types, and flow passage configurations.
Do you offer compatible options for replacing another manufacturer's fluid rotary union?
Yes, we can cross-reference other manufacturers’ fluid rotary unions to find an equivalent solution.
Do you offer custom rotary unions?
Yes, we offer custom solutions for rotary unions. We can meet your exact fluid rotary union requirements by modifying our standard products or designing a new unit. Talk to us to learn more.
What is your process for a custom rotary union solution?
First, contact us to get started. Our team will reach out to you to start learning more about your project’s technical and delivery requirements. We will consider all aspects of your application and work together to develop the best solution. We typically start by evaluating our standard product options, reviewing our library of custom rotary union designs, and examining a complete custom solution.
We will present a detailed proposal including the proposed design, cost breakdown, and project timeline. You will be assigned a sales engineer and project manager so you know who to go to with any questions throughout the process.
