This series of products is single stage double suction medium pump. The API definition is BB1.
The series pumps are single stage double suction impeller with self balanced axial force. The pump dissection is on the axis line, and the inlet and outlet are all on the pump body below the partition plane.
There are two ways to support the rotor: first, rolling bearings, grease or thin oil lubrication; two, sliding bearings, thin oil lubrication. The axle seal is optional or mechanical seal.