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Salvage pumps are general-purpose, portable dewatering pumps adapted for marine salvage work. They tend to be of rugged construction with a protective framework or packaging to reduce the risk of accidental damage. [ 6 ] :
Pumps being used to dewater a spillway at Baldhill Dam. Dewatering / d iː ˈ w ɔː t ər ɪ ŋ / is the removal of water from a location. This may be done by wet classification, centrifugation, filtration, or similar solid-liquid separation processes, such as removal of residual liquid from a filter cake by a filter press as part of various industrial processes.
The screw pump is the oldest positive displacement pump. [1] The first records of a water screw, or screw pump, date back to Hellenistic Egypt before the 3rd century BC. [1] [3] The Egyptian screw, used to lift water from the Nile, was composed of tubes wound round a cylinder; as the entire unit rotates, water is lifted within the spiral tube to the higher elevation.
It was the first practical application of the steam engine in a mine and was used to dewater coal and tin mines. The first reliable metal pump was developed by József Károly Hell and used in Schemnitz in 1749. [7] In the 20th century submersible pumps offered another innovation in mine dewatering. Currently dewatering techniques and systems ...
Sump pumps are used where basement flooding may otherwise happen, and to solve dampness where the water table is near or above the foundation of a structure. Sump pumps send water away from a location to any place where it is no longer problematic, such as a municipal storm drain, a dry well, or simply an open-air site downhill from the building (sometimes called "pumping to daylight").
Handy billy — also known as Handy-billie —is an emergency portable pump that for decades was commonly placed aboard most U.S. Navy ships from World War I on, as well as later use on civilian craft.
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