Multi-passage (MP) rotary unions are used when more than one media are used simultaneously.
An MP rotary union provides multiple seals between stationary connections and rotating equipment, such as a drum, index table, clutch, or spindle. The multiple independent passages permit the flow of the same or different media into or out of the rotating equipment. Power and fluid transfer media typically used with multi-passage rotary unions include hydraulic fluids, cutting fluids, air, or inert gas. Other media include steam, water, thermal oil, and coolant. When electrical power, signal, or data transfer is combined with fluid transfer, MP rotary unions include a through bore to accommodate a slip ring or are integrated directly with slip rings.
| MODEL |
NUMBER OF CHANNELS |
INTERFACE SIZE |
PRESSURE |
| JD2 |
2 |
G1/8" G1/4"G3/8"G1/2" G5/8" |
0-50MPa |
| JD3 |
3 |
G1/8"G1/4G3/8"G1/2"G3/4"G7/8" |
0-50MPa |
| JD4 |
4 |
G1/8"G1/4 G3/8* G1/2" G3/4"G7/8 |
0-50MPa |
| JD6 |
6 |
G1/8"G1/4" G3/8" G1/2" G5/8" |
0-50MPa |
| JD8 |
8 |
G1/8"G1/4"G3/8*G1/2" |
0-50MPa |
Fluid Rotary Unions
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. Learn more about
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 experts are here for you.
Do you offer custom rotary unions?
Yes, it's what we do best! We can meet your exact fluid rotary union requirements from modifying our standard products to complete, custom design and manufacturing. For more information see Custom Solutions
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.
Do you offer compatible options for replacing another manufacturer's fluid rotary union?
Yes, we can cross reference other manufacturer's fluid rotary unions to find an equivalent solution. Contact us to Get Started
What is the life expectancy of a rotary union?
The life expectancy of a rotary union varies widely depending on many application variables: media type, pressure, rotational speed, duty cycle, temperature, and more. If you need further assistance contact a member of our Sales Support Team.
Is there a quantity price break if I order multiple units?
To discuss quantity price breaks, contact a member of our Sales Suppor
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