??As we all know, the petrochemical industry is the energy industry, the proportion of China's national economy occupies a great weight. With the rapid development of China's economy, oil and petroleum products such as gasoline, diesel, kerosene, lubricants and other growing demand, as well as the three major synthetic materials such as synthetic resin, synthetic rubber, synthetic fiber requirements will also be greatly increased, Is bound to pull the petrochemical pump demand increases, the development prospects of China's petrochemical pump is very gratifying.Petrochemical pump is the largest amount of petrochemical production equipment in the rotating equipment, which is mainly a variety of liquid media such as crude oil, refined oil, chemical raw materials, intermediate products and finished products for delivery. According to statistics, a medium-sized refinery has more than 1,000 pumps, including dry screw vacuum pump accounted for 10%. A petrochemical plant has more than 2,000 pumps, of which dry screw vacuum pump accounted for 12%. These pumps are generally driven by a motor. Petrochemical pump to send the medium pressure from negative pressure to 300MPa, the temperature from minus 140 ℃ to zero nearly 500 ℃, some media sticky, and some also with solid particles, most of the corrosive transmission medium. Petrochemical pump is the most energy-consuming equipment, pump electricity accounts for about 50% of the whole plant electricity.China's petrochemical pump through years of development, especially since the reform and opening up the introduction of many foreign advanced technology, from the product's technical performance and product quality have a greater development. However, compared with the international top petrochemical pump production, or a greater degree of gap. Mainly including the following three aspects:First, the standardization of the pump, serialization and generalization of the poor, the pump factory since the series, standardization of parts and interchangeability is low, the lack of uniform standards, product specifications can not meet the needs of petrochemical development.Second, poor quality and reliability, mainly because of the domestic varieties of less resistant or less improper selection and processing accuracy is not high. In addition the pump seal life is low, less variety. Foreign mechanical seal life can reach about 2 years, the domestic petrochemical pump has not yet reached this level.Third, the pump efficiency is low, due to the domestic pump design hydraulic model is poor, the processing accuracy is not high, the pump efficiency is generally lower than 2% to 3%. So there are many chemical process pumps have to import from abroad.In recent years, many domestic pump from abroad to introduce advanced technology, in accordance with international standards for the production of chemical process pumps, so that the technical level of petrochemical pump has been greatly improved. In the future with the petrochemical industry technology and the continuous development of the petrochemical pump requirements are getting higher and higher. In addition to continuing to improve the quality of conventional pumps and to expand the variety of specifications, especially for the transport of corrosive materials, pump requirements are increasing, such as ethylene production in ethylene cracking unit, polyethylene plant and polypropylene plant; chemical fiber production PTA device (refined terephthalic acid), polyester plant and polyester spinning device, acrylonitrile and grease to the device. Therefore, efforts to develop corrosion-resistant pump technology. At present, the corrosion resistance of the pump material is still a large number of ferrous metal materials, high nickel alloy materials, the future requires more use of titanium, zirconium, tantalum and other excellent corrosion-resistant materials, as well as the development of non-metallic materials such as ceramics, glass and graphite and other materials??