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What is the difference between high pressure pump and low pressure pump?

What is the difference between high pressure pump and low pressure pump?

The speed of the water pump is different, the specific speed of the high-pressure pump is relatively small; the head is different, the head of the high-pressure pump is higher at the same flow rate; the material of the pump body and the shaft is different; the volume of the high-pressure pump is larger.
The high-pressure plunger pump is suitable for the descaling of high-pressure water in the process pumps, metallurgy, and steel mills in the petroleum, chemical, and fertilizer industries, high-pressure water cleaning and descaling in construction, sugar, chemical, and other industries, oil field water injection, boiler water supply, hydraulic machinery Power source. As well as food, pharmaceuticals and other parts that need to generate high-pressure liquid, the transport medium is a fluid without solid particles.
The low-pressure pump is a centrifugal pump with a rated head of 1–100m (such as an irrigation water pump). Compared with it, there are medium pressure pumps, high pressure and ultra high pressure pumps. According to relevant information, the total number of fans, pumps, and air compressors in my country is about 42 million units, and the installed capacity is about 110 million kilowatts. However, the actual operating efficiency of the system is only 30% to 40%, and its power loss accounts for more than 38% of the total power generation. It can be seen from this that doing a good job in the energy conservation of fans and pumps is of great significance to the development of the national economy.