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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


248º F

80 RPM

1/4" to 3" NPT
BSP & BSPP Available

Nickel Plated Steel

*See performance charts for details

Features & Benefits
  • High Pressure Applications - For use in hydraulic and pneumatic applications
  • GR Seal Technology - Equipped with a GR Seal, which is suitable for most fluids
  • Corrosion Resistant - Standard models feature nickel treated carbon steel construction, but are also available in all stainless steel
  • Thrust Bearings - A single acting thrust bearing permits slow rotation at high pressures