<1>General

 AY series centrifugal oil pump is a brand-new one redesigned on the basis of Y type one and by means of absorbing the
advanced foreign know-how and used for the demand of the modernization construction and for quick suitability to the updating
equip ment taking energy-saving as the center. It features:Use 45,56,70 bearings to replace the former 35,50,60 ones,
enhancing the reliability.A high effective energy saving hydrau lic mod el is used for the hydraulic portion, the average efficiency is higher than that of Y type by 5 8%. To ensure the inheritance, the type of structure, external and installation dimensions and performance range of this pump are made identical to those of Y type so as for the oil apparatus to be easily reformed.Refined selection of materials, the main body takes the materials of , categories as the base, the bearing etc. parts are made of cast steel and cast iron two materials, providing the use at a cold outdoor and on a ship with a benefit condition.The parts are widely universal and the standard parts can be used mutually for several series products. Three cooling ways are available with the bearing: air, blower and water cooling, selectable upon different medium temperatures.Of which the blower cooling is especially suitable for the area lack of water or of a poor water quality. 

<2>Feature

 Six kinds of structure are available with AY type pump: single-stage single-suction, single-stage dual-suction, dual-stage,
single-suction underslung type, single-stage dual- suction and dual-stage single-suction, dual-stage dual-suction both ends
supported type.

The casing is radial opened, especially suitable for transporting high temperature high pressure and combustible and explosive or toxic liquids. It is mounted with the horizontal central line supported. The flanges at both suck inlet and drain outlet are cast on the pump casing, vertically upward. Both axle seal cavity (packing box) and pump cover are cast integrally, used for placing packing seal and balancing, bellows and in-series mechanical seals. On the outer of the cavity a selectable water cooling chamber's jacket is cast, allocation of which should be specially required or used when to transport the water, as the medium, of a temperature over 66 and the hydrocarbon of a temperature over 150 .The impeller is integrally cast and via static balanced and the axial force of the pump is balanced mainly upon its balancing hole.

With the bearing body a set of radial ball bearing and a group of back-to-back mounted pushing ball bearing are fitted, which
are lubricated with the thinned oil of the oil swing loop. The external face of the bearing body are cast with radiation sheets for
air cooling(T<120 ), and can also be cooled with a blower(T: 120 260 ) and with water(T:260 420 ).In order to have the impeller, axle, bearing axle seal etc.parts easily taken out during the overhaul of the pump while without removal of the suck-in or drain-out pipeline, AY type oil pump uses a flexible diaphragm extended clutch.Rotating direction: CCW viewing from the prime mover. 

<3>Application: AY manual oil pump 
 AY series oil pump is used mainly for petroleum refining,petrochemical and chemical industries to transport the petroe
um containing no solid grains, liquefied petroleum gas, other petroleum products, high temperature high pressure, combustible and explosive liquids.