​Grover Specializes in Piston Rings for Natural Gas Compressor Engine Applications.

Grover specializes in designing, manufacturing and supplying compressor piston rings for low and medium-speed natural gas compressor engine applications.

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  • Leading manufacturer of taper face Permaseal® and butt cut rings for the air & gas compressor market
  • Produce rings from 1.5 inches to 30 inches for most applications to meet your special requirements
  • Grover’s trademarked taper face Permaseal® rings provides n=high unit loading against the cylinder wall to ensure quick ring sealing and superior oil control
  • Coatings for extended life


  • Sureshape process produces best in class Permaseal®, Butt, and Vented Oil rings in small lot size quantities
  • SureShapeTM to reduce risk of scuffing
  • Manufactured of special piston ring grade iron and other materials for maximum performance
  • Trusted by worldwide leading reciprocating oil & gas compressor manufacturers

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

As a leader among global piston ring manufacturers, we have acquired exclusive partnerships with major OEMs and engineers to design and produce custom piston rings that meet the most stringent requirements.

  • ​Manufacturing
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  • Agriculture​
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    Oil & Gas​