Rotary Joints tailored on your application

Customized Rotary Unions

  • Shaft and Seal Material Options
  • Mounting Configuration Options
  • Increased Temp., Cleanability
  • Electrical and Fluid Integration
  • Description
  • Good to know

  • Downloads

Customized rotating unions - individual modification & combination with slip ring possible

We can also develop rotary unions tailored to your application. Some examples are special seals, mechanical adaptations to the application and use of special shaft and housing materials, for harsh environments, high working temperatures or longer life. The long experience in the automation industry, the focus on sealing technologies and the customer loyalty approach have always led us to provide the best solutions and services. The wide range of media rotary unions can also be combined with slip rings and fiber optics rotary joints and also customized adapions. The result is an unlimited number of combinations paired with a single interface that provides simple solutions for complex applications.


What is a Rotary Union?
A rotary union, rotary transmitter or rotary joint is a mechanical assembly used to transfer media such as air, gases, oil, water, steam and also viscous substances (under pressure or vacuum) from a stationary inlet to a rotating outlet or between bodies rotating against each other. In this process, fluid connection is maintained as the media are isolated and the transition is sealed. The rotating unions are designed to transmit a wide range of temperatures and pressures for a variety of conditions and environments. In addition, the rotating unions can also have multiple passages and also transmit different types of media simultaneously.

How do I choose the best Rotary Joint for my application?
Tell us about your requirements so we can make a recommendation:
1) Type of media(s) / fluid(s) to be transferred
2) Number of independent flow channels (passages)
3) Operating pressure
4) Operating temperature
5) Operating speed
6) Shaft and housing connection type
7) Flow channel (passage) size
8) Torque & load requirements
9) Duty cycle

Installation & Mounting
Remove the rotary union from the shipping container. Inspect the entire assembly, including all passage connections to make sure that they are clean and no visual damage occurred during transport. If the assembly is a rotary union/electrical slip ring, the electrical slip ring may be packaged separately to protect during shipping. If this is the case, mount the electrical slip ring to the rotating union assembly using the supplied hardware.
We do not recommend mounting the rotary union with both the shaft & housing components solidly bolted into place. One of the two components should be mounted in a manner that allows for some movement in the event of misalignment or run-out during rotation. Using only the supply lines or hoses to fi x the stationary component in place is also not recommended. An anti-rotation arm that attaches to the stationary part of the rotary union assembly and rests against part of the equipment framework is recommended.
Make sure the electrical wiring is fixed in place and protected from contact with other components or equipment. Care should be taken to make sure the slip ring area remains clean and dry during use.
Make sure the rotary union shaft face & equipment mounting surface is clean and free from dents or chips to insure proper installation. Equipment pilot bore needs to be concentric to the center line of the rotary union shaft to assure proper function. Install face mount O-rings into groove or counter bore in rotating union shaft face. General assembly grease can be used as needed to hold O-rings into place during assembly. Align rotary union shaft with equipment pilot bore and fl ow passages, then insert into place. Bolt assembly into place using tapped holes on the face of the rotating union shaft or purchase an optional shaft flange for help mounting the union.
When mounting the shaft using threaded port connections, make sure all fi ttings are properly tightened & pipe thread sealant is used as required. Equipment mounting surface needs to be concentric to the center line of the rotary union shaft to assure proper function. After all fittings are in place, bolt assembly into place using tapped holes on the face of the rotating union shaft or purchase an optional shaft flange for help mounting the union.
If using the housing to secure the union into a piece of equipment, bolt the assembly into place using the tapped holes on the back of the housing or purchase an optional housing flange for help mounting the union.
After rotary union is installed, a dry run is recommended to assure proper mounting of the rotating union assembly. Begin rotation of the equipment, and verify that while rotating at the maximum operating speed there is no visible movement of the rotary union assembly due to misalignment.