This series of products is a multi-stage intermediate pump. The API definition is BB3.
The impeller of the pump series is arranged symmetrically, and the rotor hydraulic self balancing 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.
The rotor supports have two ways: rolling bearings or sliding bearings, and thrust bearings bear axial force. Mechanical seal is generally used in shaft seal.