Rotary unions –also referred to as rotary joints are an integral part of several industries. A typical rotary union is known to function by establishing the connection of the stationary input (referred to as “supply”) to the rotating part. This allows the moving connection to be preserved and permits the flow of media including solids, liquids, and gases easily.
A rotary union is a union that enables the easy rotation of the united parts. Therefore, it is a device that offers a seal between the stationary supply passage (like tubing or pipe) and the rotating part (like a spindle, drum, or cylinder) for permitting the flow of the fluid into & out of the rotating part.
The fluids that are typically used in rotary unions and rotary joints include several heat transfer media as well as fluid power media like water, steam, coolants, thermal oil, and rotary couplings. A rotary union or joint is also referred to other names like swivel union, rotating union, rotary valve, rotating joints, pneumatic rotary union, rotary couplings, vacuum rotary union, air rotary union, or electrical rotary union.
When you buy the best rotary union from the most reliable rotary union manufacturers, then here are some considerations to keep in mind:
Union Size & Thread Specification: Union size is the nominal size of the rotary union and the attachment or the thread of the rotating joint for installation to the machine roll. Number of Passages: The rotary union might come with 1, 2, 3, or more passages. If there are two passages, the rotary union might be “Duoflow” wherein the same media tends to enter & exit through the same rotary union. Alternatively, two passages could help in transmitting the same media at two varying pressures or two separate media that could be transmitted at two different pressures.
Supply Pipe: Most of the Duoflow rotary unions usually allow the fluid to come in & out through the same rotary joint. This type of closed rotary circuit flow would require the supply pipe for either delivering or serving as a channel for the returning of the media. Supply pipes or return pipes are supported at one end by the rotary union, and the other end could be simply cantilevered into the given roll. The same could also be supported by some sort of spider or bushing. The supply or return pipes could be stationary or rotating. This would depend on the given roll configuration of the specific machine.
The rotary unions by the best rotary union manufacturers can be used for all kinds of industrial and commercial applications. Some of the typical applications of the rotary unions include packaging machines, camera systems, medical equipment, robotics, and a wide range of automation systems. With several types of rotary unions or rotary joints available out there, you must choose the right type of rotary union as per your specific requirements.
Resource Box: If you are looking for rotary union manufacturers or slip ring assembly , the author of the article suggests Moflon Technology.