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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.

Water, Air, Hydraulic Fluid

5,075 PSI


392º F


1/4" to 2" NPT
Other Threads Available

Nickel Plated Steel

Features & Benefits
  • Small Profile - Perfect for small envelope dimensions
  • Easy Installation - Precision made wrench flats on center shaft for easy installation. Custom designs available
  • Bi-Directional Swivel - Slow or swiveling rotation
  • Corrosion Resistant - The 1200 Series is nickel plated as standard. Also available in stainless steel
  • Hydraulic Applications - Suitable for hydraulic service
  • Thread Connections - NPT standard. SAE, JIC, DIN or ISO threads are available upon request
  • No Lubrication - PTFE seals require no lubrication