- This series of pumps are horizontal, single-suction, multi-stage segmented small boiler feedwater pumps. The suction and discharge port directions are either both vertically upward, or the suction port is horizontal and the discharge port is vertically upward. The pump uses tension bolts to connect the inlet section, middle section, and outlet section into one unit. The pump rotor consists of components such as impellers and a balance disc mounted on the shaft. Both ends of the rotor are supported by rolling bearings, which are lubricated with grease and cooled with water. The axial thrust of the rotor shaft is balanced by the balance disc. ISG and ISW series centrifugal pumps
