Water and pump
Improvement of water is very important for human life and production. Since ancient times has had a variety of water, such as Egypt's chain pump (17th century BC), China's Gao (17th century BC), Potter (11th century BC) and water (1th century AD). More famous there Third century BC, invented by Archimedes screw, a smooth continuous water to several meters high, its principles are still used by the modern screw pumps.
Around 200 BC, ancient Greece craftsman ktesibios invented fire-fighting pump piston pump is one of the most original, has a typical piston pump for main components, but only after the emergence of steam engines piston pump develops rapidly.
1840-1850, the United States invented Worthington pump and steam cylinder opposed, direct acting piston steam pumps, marked the formation of the modern piston pump. 1851-1875, multistage centrifugal pumps with guide vanes have invention, makes it possible to develop high lift centrifugal pumps. During the climax of the 19th century development of piston pump, used in hydraulic machines and other machinery at the time. However, with the sharp increase in water demand, since in the 1920 of the 20th century, low speed, limit flow piston pump has been high-speed centrifugal and rotary pumps replaced. But in the field of high pressure low flow reciprocating pump still occupy a major position, especially diaphragm pumps, piston pumps with unique advantages, applications are increasing.