... (mm)A-first reconstruction, Y-centrifugal oil pump, S-first impeller double-suction,,material code of ... by A, B.......Structure:AY-type oil pump has six models: single-stage single-suction cantilever ... Its inlet and outlet flanges are installed on its pump body, vertical and upward. Shaft seal (stuffing ... mono-block cast and static balancing. Its axial force is balanced by impellers balancing hole.Its ...