SUMMARY Donaldson ® currently has multiple compressed air filtration lines installed in a number of facilities across the U.S. for a major bottled water company. These lines supply purified process air to the PET bottle blowing machines which produce bottles for bottled water. By injecting sterile compressed air into a shell of polyethylene terephthalate (PET) the shell expands into a mold which produces the bottle shape. These bottle blowing

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