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About Us

Hydraulic Piston Ring

In 1978 Hydra-Seal, Inc. began supplying industrial piston rings to the hydraulic cylinder market. Now we serve many diverse markets including:

  • Die Casting
  • Railroad— Brake and Ride Control
  • Automotive— Shock Absorbers, Transmissions and Turbo Chargers
  • Industrial Equipment— Machine Tools, Air Compressors, Hydraulic Clutches, Forge Hammers, Presses, Pumps and Valves
  • Glass Production
  • Electric Power Generating

And of course our rings still are used in hydraulic cylinders for mobile equipment— earth scrapers, hydraulic shovels, hydraulic hoist cylinders in dump trucks and an assortment of agricultural hydraulic equipment including tractors.

In January 2008, we proudly became an ISO 9001-2000 company and are now ISO 9001-2008 Certified. We are registered with Perry Johnson of Troy, MI.

Also, we purchased Superior Piston Ring Company of Detroit, MI in December 2008. Superior started producing industrial rings in 1920. Their operations have been consolidated in our plant in Menomonee Falls, WI where our advanced methods of ring production are utilized. This acquisition has allowed us to expand our product line and serve in new markets.

Dedicated Piston Ring Mills

Hydraulic Cylinder Repair & Services

In 2015 our knowledge of the hydraulic cylinder industry lead us to start a new division in pneumatic and hydraulic cylinder repairs and hydraulic services to facilitate the needs of Menomonee Falls, WI and the surrounding areas. Some hydraulic cylinders that we repair are double-acting, single acting, telescopic, rephasing, and more. We have the expertise and machinery to recreate hydraulic components for all types of pneumatic and hydraulic cylinders.

During this addition we have acquired a HTA-4100 Sunnen Hone to rework old hydraulic cylinder tubes and pneumatic cylinders to remove scratches and scours in tubing and give the necessary cross-hatch that is required. Our team has been trained by Sunnen to cover all honing needs that we may come across.

We can take care of all your hydraulic hose and fittings with our Gates crimper. Our staff has the necessary training to identify and create hydraulic hoses for hydraulic pumps, hydraulic valves, hydraulic cylinders, hydraulic power units and motors.

We would like to extend a thank you to David Johnson at Corfu Machine Co, Inc. and Richard Hineman from Weber Hydraulics/Hyco Alabama for all their help and information for our hydraulic cylinder repair division.

Hydra Seal, WI