AY single two-stage centrifugal pump (centrifugal pump | centrifugal pump) series, is based on the old Y-series pump to transform and redesign. It is to meet the needs of modernization, as soon as possible to adapt to energy-saving equipment replacement and development of new products, has the following characteristics: 1, the bearing body parts of the original 35,50,60 bearing bodies were 45,55, 70 bearing body, improve reliability. 2, hydraulic flow through the site with a high efficiency energy-saving pump hydraulic model, the average efficiency of the old Y-type oil pump 5-8% higher. 3, in order to maintain inheritance, AY-type pump structure type, installation size, performance parameters to maintain the same range with the Y-type pump, easy to upgrade the old device. 4, a high degree of generalization of parts, common standard parts for several series of products sharing. 5, material selection, the main body to â…¡, â…¢-based materials, bearing bodies and other components increased for the cast steel, cast iron two, for the cold areas, exposed areas, open-air use, marine provided favorable conditions. 6, air bearing cold, cold fan, water-cooled three, according to the different temperature of the pump selection. The fan is especially suitable for cold and poor water quality in areas. AY single and two series of pumps Performance Range: Flow Q = 2.5 ~ 600m3 / h Head H = 30 ~ 330m Temperature T = -45 ℃ ~ +420 ℃ AY-type pump can be used in petroleum refining, petrochemical and chemical industry and other Local delivery of solid particles of petroleum, liquefied petroleum gas and other media. 50AY â…¡ 60 × 2B, 250AYS â…¢ 150C 50,250 - suction inlet diameter (mm) A - the first transformation Y - Centrifugal pump S - the first impeller for the double suction â…¡, â…¢ - flow parts parts material code : â… class HT250, â…¡ ​​class ZG230-450, â…¢ class ZGCr13Ni. 60,150 - single-stage head (m) 2-series B, C - impeller cutting frequency, the order of A, B ...... said. AY-type pump is divided into single-stage single suction and two single-suction cantilever, single-stage suction cantilever, single-stage double suction and two double-suction two support, two single-suction two support six. Radially split shell, especially for conveying high temperature and flammable, explosive or toxic liquid. The installation of horizontal centerline support. Pump suction flange and discharge flange are cast in the pump body, and are vertically up. The bearing chamber (stuffing box) and pump cover are cast in one piece, which can be filled with seals and balanced, bellows-type, tandem-type mechanical seals. An optional water-cooled chamber jacket is cast outside the shaft seal chamber. The water-cooled chamber must be specially equipped or used when the temperature of the water in the transfer medium exceeds 66 ° C and the hydrocarbon temperature exceeds 150 ° C. Impeller as a whole casting, and the static balance, the pump axial force mainly by the balance of impeller to balance. The bearing body is equipped with a set of radial ball bearings and a set of thrust ball bearings mounted back to back. The bearings are oil-lubricated with oil slinger. The outer surface of the bearing body is provided with cooling fins for air cooling (T <120 ℃) Selection of fan cooling (T = 120 ℃ -260 ℃) and water cooling (T = 260 ℃ -420 ℃). For pump maintenance, it is easy to disassemble the impeller, shaft, bearing, shaft seal and other parts without having to disassemble the suction or discharge lines. The AY type oil pump adopts the flexible membrane lengthened coupling part. 1, cooling water is based on temperature and use requirements, the shaft seal chamber, bearing or pump bracket cooling, water pipelines proposed for each 0.3-0.7m3 / h, the pressure is 0.2-0.3MPa. 2, seal flushing is based on the pump delivery medium and its temperature, pressure and other working conditions vary, the sealing liquid for each pump chamber as the table below, for internal or external supply can be. Sealing Nominal Diameter (mm) 13-47 48-59 60-84 85-95 96-133 Average Sealing Capacity (m3 / h) 0.18 0.24 0.36 0.48 0.66
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