The development of foreign countries: the development of foreign pumps is faster and the technology is more advanced. The pump made by a large pump manufacturer abroad has the advantages of high speed, small volume and light weight. Its flow is 1.5~2 times that of the same caliber pump in our country. Especially in Holland, Japan, the United States, the former Soviet Union and other countries, the performance index of the pump is obviously superior to that of the domestic. Holland pays more attention to the investment of scientific research, its scientific research force is very strong, the facilities are more perfect, and the water pump and its flow channel are systematically studied. Foreign countries especially developed industrial countries, they in the design and manufacture of pumps and pump to study the degree of attention, is worth learning and reference, but not to say that they are perfect in pump design and manufacturing, but also need to make a breakthrough in the important step parameters of the pump head and flow etc. and this requires investment in improved mechanical structure of water pump. With the development of science and technology, the domestic pump industry to large-scale, high-speed, high strength, high pressure, high reliability, long life, and machine control system, instrument integration and other high-tech development, among them, the life and the reliability and automation has become the main pump selection factors to consider.
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