Does rotary union has bearing in it

Does a Rotary Union Have a Bearing? Bearing vs. Bearingless Rotary Union

A rotary union does not necessarily have a bearing. This is one of the most common questions we receive when customers send us a rotary union drawing, a worn-out sample, or a photo of an existing assembly. The correct answer depends on the construction of the rotary union, its operating speed, the sealing system, how…