What is a Rotary Union?
A rotary union is a device used to seal a rotating part and a stationary supply passage, allowing for the transfer of fluids without leakage in between. Often called swivel joints, rotary couplings, and rotary manifolds, these useful devices are engineered taking into consideration factors like the fluid to be transferred, its pressure and temperature, and even the number of flow paths.
What Are the Components Of A Rotary Union?
A rotary union is made of a number of simple components like:
- Housing: A structure that holds all the components of a rotary union together and acts as a framework. The housing also contains an inlet port where the fluid-supplying line is attached.
- Shaft: The shaft is a hollow tube that facilitates the flow of media from the supply line to the rotating part.
- Bearings: Bearings are little parts that allow the device to rotate as required, and can either be roller bearings (like ball bearings or tapered bearings) or non-roller bearings (like thermoplastic bushings).
- Seals: Possibly the most important component of the lot, seals prevent the fluid leaking outside while the rotary union is actively in use.
