Custom Piston Ring Solution for Air Compressor

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Grover’s Piston Ring Design Produces Higher Quality Product with Dramatically Lower PPM Pass Through Rate

Challenge - Accepted

A large manufacturer of piston air compressors contacted Grover Corporation asking if we would meet with their Engineering Department. They told us their Quality Department had recently identified that 4% of their piston air compressors in the market were experiencing an oil pass through rate higher than the maximum allowable 14 particles per million (ppm).

The piston air compressors that did not meet the ppm standard were being recalled, and the company needed to find a solution quickly to halt the lost time & expenses that were being expended on the recall process.

Solution - Delivered

Grover’s engineers met with the Production, Quality and Engineering Departments to analyze the application.

Each piston in the two-stage air compressor was using three Permaseal® taper face piston rings and a three-piece oil control ring.

Our engineers began by focusing their attention on the "cross-hatch" pattern (used to ensure proper lubrication and seal of pistons in cylinders). Then, in each stage, our engineers replaced one of the taper face piston rings with a butt cut taper face piston ring that featured a scraper groove.

Final Result – Achieved

The new ring set design was tested on one of the air compressors that did not meet the ppm standard. After 24 hours of pass through rate testing, the ppm were reduced to 3 – 3.5.

When the new piston ring set design was used in a new cylinder, oil pass through rate dropped to just 2 ppm.

The customer was extremely impressed with Grover’s engineering and the final result it achieved. The customer was not only able to eliminate the expensive operation of re-honing the cylinder for the recalled air compressors, it was also able to produce a better product!

Our knowledgeable staff engineered a superior custom piston ring solution that was delivered with a short lead time. We also helped produce a higher quality product that exceeded the customer’s expectation.

Putting the Seal on Your Success

Grover works collaboratively with customers in many sectors of the global marketplace. It is not only the work we do, but how we do it that is important.

Grover understands that each company's needs are unique...and so are their products and services. Through a collaborative process like the one outlined in this example, Grover can help the customer design and engineer world competitive products.

We provide the caliber of quality customers expect and the flexibility they need, while meeting the lead times they demand. Grover employs a flexible and adaptable approach to meeting primary customer needs: personalized service, short lead times and high quality products.

Dedicated. Committed. Responsive. Accommodating. These are some of the founding principles of Grover Corporation and some of the words used to describe Grover's customer service today.

Contact Grover today to improve the performance and competitiveness of your products.