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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.

Air, Water
117 PSI


250º F

3,500 RPM

1/8" to 1/4" NPT
Machine Thread
BSP & BSPP Available

Nickel Plated Steel

*See performance charts for details

Features & Benefits
  • Ideal for high speed air and water applications with space constraints
  • Corrosion resistant, all steel parts are nickel plated
  • Small envelope dimensions make the 300 Series suitable for use in applications with space constraints