The PW-11 is a retrofit upgrade that meets API 610 11th edition for horizontal single stage OH2 process pumps. The upgrade ensures petroleum refineries have a fast and cost-effective way to modify any brand of existing OH2 pump and achieve API 610 11th edition requirements/reliability without expensive changes to the wet end (casing & impeller) and piping. We utilize customers existing casing and impeller with PumpWorks 610 PW-11 retrofit upgrade kit. Alternatively, with access to over 1,200 single stage surplus/used OH2 overhung process pumps, we can match your existing unit.