From the pump performance range, giant pump flow up to hundreds of thousands of cubic meters per hour or more, while the micro-pump flow rate is less than dozens of milliliters per hour; pump pressure from the normal pressure up to 19.61Mpa (200kgf / cm2) above; the temperature of the liquid being transported as low as -200 degrees Celsius, the highest up to 800 degrees Celsius. Pumps deliver a wide variety of fluids, such as delivering water (clean water, sewage, etc.), fluids, acids and alkalis, suspensions, and liquid metals. In the production of the chemical and oil sectors, raw materials, semi-finished products and finished products are mostly liquids, whereas the conversion of raw materials into semi-finished and finished products requires complicated processes that pump to deliver liquids and provide chemical reactions with pressure flow In addition, in many devices also use the pump to adjust the temperature. In agricultural production, pumps are the main irrigation and drainage machinery. A vast rural areas in our country, every year in rural areas require a large number of pumps, agricultural pumps in general account for more than half of total pump output. Pumps are also the most widely used equipment in the mining and metallurgical industries. The mine needs to be drained by a pump. In the process of beneficiation, smelting and rolling, the pump is required to supply water first and so on. In the power sector, the nuclear power station needs a nuclear main pump, a secondary pump, a tertiary pump, and a thermal power plant which require a large number of boiler feed pumps, condensate pumps, circulating pumps and ash pumps. In the national defense building, the regulation of aircraft flaps, tail rudders and landing gear, the rotation of warships and tank turrets, the ups and downs of submarines, etc. require the use of pumps. High pressure and radioactive liquid, some also require the pump without any leakage. In the shipbuilding industry, the number of pumps used on each ocean going wheel is generally more than 100 and its type is also varied. Others, such as urban water supply and drainage, steam locomotive water, lubrication and cooling in machine tools, transporting drifts and dyes in the textile industry, transporting pulp in the paper industry, and transporting milk and sugar foods in the food industry, require large quantities Pump. In any case, pumps, pumps, running pumps, tanks, submarines, or drilling, mining, trains, ships, or everyday life are needed everywhere. This is the case, so the pump as a general machinery, it is a kind of mechanical industry in the product.
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