Rotary unions or swivel joints are mechanisms used to transfer fluid under vacuum conditions or pressure, from a rotating outlet or stationary inlet. It preserves and isolates the fluid connection. They are also referred to as rotary joints, rotary couplings or swivel joints, or fluid swivels.
This industrial equipment is engineered to endure a wide range of temperatures, speeds, and pressures for a variety of environments and working conditions.
The typical function of a rotary union is to connect to input, and it is secured onto another mechanism while allowing a moving connection to be preserved in the process.
Rotary unions are used in a wide spectrum of applications; whether they are miniature rotary unions for the semiconductor industry, to they are large and heavy-duty rotary unions for industrial usage.
In industries like oil industries, rotary unions for hydraulic oil are commonly used.
What are the different categories of rotary unions? Let’s know some of them. Each of them has different properties and specialties. Let’s know about a few of them in this blog.
Types of Rotary Unions
1109-010-165 Rotary Union
This is a special rotary union that uses patented pop-off technology. It allows unlimited dry running without media pressure.
Because of its full-flow design, there are no obstructions to trap chips or debris. Because of their bearing support with threaded rotors, you get easy installation.
In these unions, labyrinth systems and large vents protect ball bearings. These balanced mechanical seals are made from silicon carbide. Therefore, they ensure a long life even under difficult operating conditions.
Their anodized aluminum housing that resists corrosion.
1129-039-301 Rotary Union
These patented unions use pop-off technology. Therefore, they allow unlimited dry running without media pressure. Their full-flow design does not have any obstructions to trap chips or debris. These balanced mechanical seals made from silicon carbide ensure long life under difficult operating conditions as well. They are also made from anodized aluminum housing resists corrosion.
Also Read: Difference between Rotary Joints and Rotary Unions
2620-200-252 Rotary Union
These unions have two independent passages. They are useful for applications such as clamping, under-clamping, cooling, work-piece sensing, and so on. They offer long life and reduced torque even at maximum pressure.
1129-016-301 Rotary Union
These unions have a single passage for coolant or MQL. They also have patented pop-off technology, which allows unlimited dry running without media pressure. Their design is full-flow and there is no obstruction to trap chips or debris. Balanced mechanical seals made from silicon carbide for long life even under difficult operating conditions. Anodized aluminum housing resists corrosion.
1109-040-188 Rotary Union
These unions also have a single passage for coolant or MQL. They use patented pop-off technology, which allows unlimited dry running without any media pressure. They have a full-flow design that does not have any obstruction to trap debris or chips. They are bearing-supported with threaded rotosr, which ensures easy installation. These are different types of air rotary unions. While deciding the best type, you need to analyze and understand the type of application. Before deciding on a particular type of union, you have to see the application type.