The Kadant Blog

Rotary Joints & Unions


Over-The-Shaft Rotary Union Basics

Over-the-shaft (OTS) rotary unions are used with journals (shafts) that contain channels for conveying fluid into and out of rolls.

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The History of the Rotary Joint

Throughout the 19th and early part of the 20th century, the accepted method of supplying water or steam to a rotating cylinder was through the use of stuffing boxes or packing glands, which proved inefficient.

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How Multi-Passage Rotary Unions Work

Multi-passage rotary unions transfer media into and out of rotating equipment without leaking or loss of pressure. Either end of the rotary union can rotate, and fluid can travel in any direction.

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