Parker-Hannifin has agreed to buy Filtration Group for $9.25 billion, adding a major filtration-technologies manufacturer to its industrial portfolio. - tim chong/Reuters Parker-Hannifin has agreed to buy Filtration Group for $9.25 billion, adding a major filtration-technologies manufacturer to its industrial portfolio. The motion-control technologies company said Monday that it will finance the purchase with a combination of new debt and cash on hand. The transaction, subject to regulatory approvals and ...