Industrial automated equipment often needs to deliver multiple kinds of media from stationary pipelines to continuously rotating components. Instead of installing several single‑passage rotary unions, engineers choose multi‑passage rotary union (multi‑channel rotary joint) as an all‑in‑one fluid rotary transmission solution.

A multi‑passage rotary union integrates 2 or more independent isolated flow passages inside one compact housing. Each channel works separately, transmitting hydraulic oil, compressed air, vacuum, cooling water, coolant or nitrogen at the same time, no cross‑contamination between different media. It realizes 360° unlimited continuous rotation for rotating tables, robot joints, machine tool spindles and rotary fixtures.