Two-passage rotating unions, also known as rotary joints or swivels, transfer various fluids or gases鈥攕uch as water, glycol, air, hydraulic fluid, coolant, MQL, hot oil, or steam鈥攆rom a stationary source into a rotating machine application through two separate passages. We offer a wide range of union sizes to meet your specific needs. All World stocks high-quality two-passage rotating unions from . Explore our extensive inventory online and take advantage of our same-day shipping.