... Temperature T=-45~420AY-type oil pump is used in the conveying of petroleum, liquefied petroleum gas and other medium in petroleum ... ,250-inlet diameter (mm)A-first reconstruction, Y-centrifugal oil pump, S-first impeller double-suction,,material code of over-current ... times are represented by A, B.......Structure:AY-type oil pump has six models: single-stage single-suction cantilever type, double ...