​A World Piston Ring Leader to the Agriculture, Construction, Material Handling & Sanitation Industries

Grover Corporation is a leader in the mobile hydraulics industry, offering a wide variety of piston rings, ranging from 1/2″ (12.7mm) in diameter to over 90″ (2286mm) in diameter. Accompanied with order management, delivery and packaging solutions, we are dedicated to meet your needs.

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  • Grover’s Permaseal® joint design is the industry standard for hydraulic cylinder service. It is internationally recognized as the best choice in hydraulic cylinder applications.
  • Agriculture: Grover piston rings are critical to the operation of a wide range of equipment used in planting, harvesting and processing in farming, where durability in an extreme environment is required.Construction, Material Handling and Sanitation: Grover rings provide the power and strength to move heavy machinery and the controlled movements for a precise touch. They are strong enough to handle the toughest environments and flexible enough to protect sensitive seals and valves.
  • Industry standard:-Grover’s Permaseal® joint design is internationally recognized as the best choice in hydraulic cylinder applications.


  • Performs better than elastomer compounds in high and low temperatures.
  • Superior sealing performance with interlocking joint design.
  • Total fluid compatibility.
  • Double-acting seal designed to pass open ports
  • Because the Permaseal® joint design is bi-directional, fewer rings are required in double-acting applications, and costly assembly errors are eliminated in all hydraulic cylinder applications.

We make a living by what we get, but we make a life by what we give.

- Winston Churchill

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Industries We Serve

Because every customer has different application needs, Grover provides the value-added service of customized programs uniquely suited to specific piston ring needs.

  • ​Agriculture
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  • Material Handling​
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