Skip to main content
Skip to main content

Blog / 2024.04.18

Introducing the Innovative ROTOCON ERGT-800-1PRU Rotary Electrical Ground & Rotary Union Assembly by Meridian Laboratory

Koral Schuster / ROTOCON, ROTOCON New Product

Rotary Ground with Rotary Gas Union Integration

Meridian Laboratory has always been at the forefront of pioneering rotating electrical solutions. Continuing its tradition of innovation, the company is proud to announce the launch of its latest product: the ROTOCON ERGT-800-1PRU rotary ground and rotary union combination. This new model integrates an 800 amp, high-current rotary electrical ground along with a single port rotary union into one assembly, designed to increase the output and quality of rotational welding applications.

Key Features and Benefits

  • High Current Rotary Electrical Ground: The ROTOCON ERGT-800-1PRU is rated to  800 amps DC at 100% duty cycle, ensuring that it can withstand the demands of even the most challenging applications.
  • Integrated Rotary Union: A feature benefit of the ROTOCON ERGT-800-1PRU is its integrated rotary union. This addition allows for the seamless passage of up to 100 psi of shielding gas, compressed air, hydraulic oil, or grease to pass through the 1/4” NPT hole running through the center of the ROTOCON rotary electrical ground. The ROTOCON ERGT-800-1PRU can be purchased with or without a supplied rotary union, depending on the needs of your application.
  • Maintenance-Free Reliability: True to the performance standards of all ROTOCON rotary grounds, this model offers completely maintenance-free operation, consistent current delivery without fluctuations, and does not require greasing, adjustments, or routine replacement.
  • Superior to Traditional Rotary Grounding Methods: ROTOCON rotary grounds outperform traditional brushed and other metal-on-metal rotary grounds offered by competitors like Tweco, Lenco, Sumner, and others. By eliminating the need for maintenance the ROTOCON ERGT-800-1PRU is ideal for fully and semi-automated welding applications.
This video showcases a head-to-head comparison of seven different rotating electrical grounds.
  • Versatile Applications: Specifically tailored for applications that require electrical current and gasses to rotate, such as welding positioners that are fully or semi-automated. This model adds the capability for shielding gas to be passed through the entire assembly along with an electrical ground connection. It can rotate 360 degrees continuously or be used for momentary indexing applications.
  • Uninterrupted Performance: This new feature facilitates a steady and uninterrupted rotational ground circuit while also delivering shielding gas commonly used in welding. This ensures a more efficient and consistent welding process.

Where to Buy

Meridian Laboratory offers this new model directly to customers, as well as to integrators, original equipment manufacturers (OEMs), and resellers worldwide.


The ROTOCON ERGT-800-1PRU rotary ground represents a significant advancement in the field of rotational welding, plating, and cutting. By combining a high-current rotary electrical ground with a rotary union, Meridian Laboratory has created a product that not only improves the welding process but also sets a new standard for efficiency and reliability in the industry. Please feel free to contact Meridian Laboratory with any questions or upcoming projects, we look forward to working with you.

Customers who rely on ROTOCON rotary grounds!

Looking for More?

If you didn’t find what you need – contact us, we are always open for new and exciting challenges.

Contact Us