Water Unions feature widely spaced ball bearings.
Press Release Summary:

Original Press Release:
Deublin 6000 Series Water Union
The 6000 Series Water Unions in sizes 2", 2-1/2", 3" & 4" feature Deublin's exclusive "Cartridge Seal" design allowing on-the-machine replacement of seals quickly & easily! There's no need to remove hose connections or use special tools. Repair can be conducted by simply removing the 6 hex bolts and end cap,
then removing the cartridge seal & rotor seal face & replacing with new seals.
In addition to ease of on-the-machine repair, the 6000 Series Rotating Unions feature
* balanced mechanical seal with carbon against tungsten carbide seal faces for reduced friction & wear
* ELS version with silicon carbide against tungsten carbide seals for abrasive environment
* heavy duty widely spaced ball bearings for resistance to shock & vibration