API 610 - BB3 Pumps Axially split multistage between-bearings pumps are referred to as BB 3 type pumps. Finder have been manufacturing BB3 pumps for decades with numerous units in operation around the world. Series 2 Finder Pompe HPM API 610 BB3 two stage axial split pumps for flows up to 600 m3/hr and TDHs of 900 m. Finder Pompe HPMB API 610 BB3 multi stage two stage axial split barrel pumps for flows up to 1,100 m3/hr and TDHs of ...