For 80+ years, Grover Corp has proven to be a global leader among sealing ring and piston ring manufacturers. Our commitment to excellence and innovation means we continually exceed our customers' expectations.We invest in quality and innovation and employ advanced manufacturing technologies that set the standard for the industry. We are constantly innovating new ways to solve complex problems, reduce lead times, cut costs and evaluate how we can better serve you and your organization.  At Grover, we believe people are the core of everything we do. We invest in our people and empower them to do whatever it takes to ensure you have exactly what you need to remain competitive, meet your goals and keep your company growing.   We understand that when you use our rings in a product you sell to customers, we become an extension of your organization. This is not something we take lightly. Grover’s Milwaukee, Wisconsin manufacturing facility is one of a select group of companies worldwide that is certified for ISO/TS 16949, as is the Texas plant ISO 9001:2000 certified.   Grover Corp is the only piston ring manufacturer serving the industrial marketplace with those quality certifications and a lean culture. Our customers benefit from a high performance management system based on these ISO quality systems as well as lean manufacturing principles that deliver consistently high levels of customer satisfaction. In fact, in customer satisfaction surveys conducted by an unbiased third party for the past 15 years, Grover was rated ahead of its competition in all areas examined.   With stringent quality systems, Grover has a time-tested reputation in the marketplace as a precision manufacturer and key supplier to some of the largest names in the industry. We think that says a lot about our commitment to maintaining the highest quality standards.   Grover Corporation boasts a rich history, extensive industry knowlege, and in-depth applications expertise. We always strive to do more, better. Grover provides the superior quality, service and flexibility you expect so you can deliver the same to your customers.   Grover first opened its doors in Milwaukee in 1929, as Grover Piston Ring under founder Richard Grover. It was innovative thinking that led Grover to develop the Permaseal® interlocking joint in 1929. It is the same innovative thinking that drives us to set new benchmarks for quality, efficiency and service today.  In 2005, Grover Corporation acquired the operations of Double Seal Ring Co. in Fort Worth, Texas. With the addition of Double Seal, we added new products to our inventory, and a rich history of quality, innovation and industry knowledge.