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ROTARY UNION ® transfers media (water, steam, air, oil, hydraulic fluid, etc) from a stationary source to rotating machinery, such as a drum or an indexing table. They are used in process industries such as; paper, printing, rubber and plastics, textile and chemical. Rotary Unions are also used on cranes, machine tools and many other applications. Duff-Norton Rotary Unions are used to provide heating or cooling media like steam, hot oil, water or coolant to control the surface temperature of a drum or roll, to transfer air or hydraulic fluid to moving components or to add fluids to mixers while in motion. Rotary unions, rotary joints and rotating joints ranging up to 750 psi and up to 5,000 RPM are available.
Rotary Union Application Analysis Form

Duff-Norton Engineers will be pleased to make recommendations for your specific requirements. There is no obligation for this service - simply complete the form below. If you would like to discuss your application with a Duff-Norton
engineer, call 1-800-477-5002.

If you prefer,  Click Here to print a blank Application Analysis Form (pdf), complete the form, and send to Duff-Norton at the fax number or address shown below. If you would like to send a sketch of your
application or design drawings in complete confidence, mail or fax to:

Duff Norton Company
PO Box 7010
Charlotte, NC 28241
704-588-1994 FAX

* Required Fields

Size Required or Estimated Flow Required

Connection (pick one)

If Threaded Shaft Specify Type

If Threaded Shaft Specify Direction



Does Pressure or Temperature fluctuate or change during operation? If so, please give maximum, minimum, and describe

Diameter of Roll


Does direction alternate

Media to be used

Hydraulic Oil Type


Is medium abrasive, corrosive, flammable, explosive, or toxic?

Pick One

If Dual Flow, Specify Syphone Size
& Type
If Stationary Syphone Specify Connection Type
If Threaded, Specify Type

If Multiports, Specify number of ports  
& Port Size

How many used?

Potential used?

Is Competitive Joint Who makes it?

What Model or Type?

Any problems? Please describe

Any other information regarding application and requiremens of rotating joint. Send any drawing or sketches available