
PES rotary unions are used to transfer electrical signals and/or fluids from a stationary structure to a rotating one. Essential for continuous rotation applications, they can also be an alternative to cable carriers — thereby improving performance and increasing the reliability of your partial rotation machines.
- 3D design service
- Manufacturing of mechanical parts
- Connector assembly/wiring
- Harness assembly
- Automatic leak testing
- Continuity/insulation testing
- Network performance testing
EXPERTISE, EXTENSIVE RANGE, QUALITY AND BUDGET...
PES has extensive experience in signal and power transmission for industrial processes.
We provide engineering services from the early stages of your design to integrate your rotary union as efficiently as possible.
CUSTOM INTERFACE DESIGN
Mounting accessories, connector adaptation, or the design of junction boxes.
We offer a complete service to deliver a turnkey solution tailored to your needs, assembled and tested in our workshops.

Custom Fluid Outlets
Choose your outlets: radial or axial, single or multi-channel, with options for diameter, threading, or fittings. Each fluid interface is designed to precisely match your mechanical constraints and application requirements.
Custom Electrical Outputs
Number of circuits, signal type, current, voltage — everything is customizable. Choose your connections (wires, connectors, shielded cables), their position and labeling for quick and error-free integration.
Uninterrupted Electrical Connections with Our Slip Rings
Enables continuous transmission of signals or power between a stationary part and a rotating part. No cable winding, no interruption — even at high speed.
Continuous Fluid Transfer with Our Rotary Unions
Ensures the transfer of liquids or gases between stationary and rotating parts. No leakage, no hose twisting — even under pressure and continuous motion.
Fixed Inputs to Rotating Circuits
The inputs remain stationary and power the internal rings. The slip ring ensures transmission to the rotating part, without loss of contact or interruption, even during continuous motion.
Optimized Fluid Inputs
The fluid enters through the fixed connections and is then transferred to the rotating channels without leakage. The rotary joint maintains a constant flow, even under pressure and during continuous rotation.
Here are a few examples of our productions
DESIGN AND MANUFACTURING CAPABILITIES TO MEET YOUR MOST COMPLEX APPLICATIONS
Other interfaces can be designed to meet the requirements of your most complex applications: power, fieldbus, RF signals, fiber optics, pneumatic or hydraulic. Numerous configurations are possible!
PES has a design office capable of analyzing advanced fluid, electrical or optical connectivity solutions. Whether it's simple advice, design, or even manufacturing with quality control, the PES team has the tools and expertise to successfully carry out your project.
Mounting kits for your applications

Mounting Kits
We offer a wide range of off-the-shelf mounting kits. Originally designed for indexing tables, they can also be adapted to other projects. These kits provide an available and easily integrable solution (3D files, installation manual). Their robust mechanical structure ensures easy assembly and installation while allowing convenient access to all connectors.