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Duff-Norton's Series 9000 General Purpose Rotary Unions® 

The 9000 Series General Purpose Rotary Unions® features a bellows type seal to provide greater flexibility where equipment misalignment is inherent, and to resist seal hang-up in media contaminated with debris and suspensions.  All sizes over 1-1/4" have dual bearings for additional load support.  The 9000 Series is available with either flanged or threaded shaft connections for greater mounting flexibility.  


Operating Parameters

Max. Water Pressure 250 psi 17 bar
Max. Water Temp 375°F 190°C
Max. Steam Pressure 150 psi 10.2 bar
Max. Temp Steam 375°F 190°C
Max. Hot Oil Pressure 100 psi 6.8 bar
Max. Hot Oil Temp 375°F 190°C
Max. Air Pressure 100 psi 6.8 bar
Max. RPM NPT 700 700
Max. RPM MT 1500 1500
Max. RPM Air 320 320
Technical Data
Single Flow to 1" 
Single Flow to 3" 

Single Flow Flanged 

Dual Flow to 1"

Dual Flow-Flanged 

RSP to 3"
RSP Flanged
Dual Flow Compression Fitting Syphon
Repair Parts
Performance Charts
Auto CAD Drawing
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All drawings and dimension are for informational purposes only and
are subject to change.