Our customer, a chemical plant, uses in one department, 7 air operated double diaphragm pumps (AODD). On that application, pumps from a known competitor, had a useful service life of 4 to 6 weeks between rebuilds. The plant spent over $ 100,000 a year, in parts and labor, on those 7 pumps.
We evaluated the application, and recommended the same type of pumps (AODD), by Yamada. Once the original trial pump got beyond 3 months without failure, customer decided to gradually replace all 7 units by Yamada pumps. Some have now been in service for over 10 months, and are still running.
The purchase of 7 pumps on a project budget, for much less than the money spent in repairs each year, resulted in nearly $ 100,000. savings on the annual maintenance budget.