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A bilge pump is a water pump used to remove bilge water. Since fuel can be present in the bilge, electric bilge pumps are designed to not cause sparks. Electric bilge pumps are often fitted with float switches which turn on the pump when the bilge fills to a set level. Since bilge pumps can fail, use of a backup pump is often advised. The ...
The bilge pump was an improvement on the first hydraulic pumps used in antiquity: force pumps. Invented around the early 3rd century BCE, the most primitive design of a force pump consisted of a piston pushing water out of a tube, constructed by soldering individual bronze elements (Stein 246).
Bilge compartment in a steel hulled ship (looking down) Bilge compartment and pump. The bilge / b ɪ l dʒ / of a ship or boat is the part of the hull that would rest on the ground if the vessel were unsupported by water. The "turn of the bilge" is the transition from the bottom of a hull to the sides of a hull.
Both ships had several hand-operated bilge pumps that worked like a modern bucket dredge, the oldest example of this type of bilge pump ever found. The pumps were operated by what may have been the oldest crank handles yet discovered; [ 11 ] however, the reconstruction of the cranked pump from fragments, including a wooden disk and an eccentric ...
Chain pumps were used in European mines during the Renaissance; mineralogist Georg Agricola illustrated them in his De re metallica (1556). [7] Chain pumps were commonly used on naval vessels of the time to pump the bilges, and examples are known in the nineteenth century for low-lift irrigation.
They are found on board ships where they are used to separate oil from oily waste water such as bilge water before the waste water is discharged into the environment. These discharges of waste water must comply with the requirements laid out in Marpol 73/78. [1] Bilge water is a nearly-unavoidable byproduct of shipboard operations.
A chain pump is made of an endless chain carrying a series of discs that descend into the water, and then ascend inside a tube, carrying with them a large quantity of water. They are a simply made, old hand-powered pumping technology [10] In the 18th century they were used as ship's bilge pumps. [11]
Less hydro-dynamically efficient than a fin keel, they have a shallower draft. Full-length bilge keels add rigidity to a hull. Bilge keel craft are found in areas with large tidal ranges to keep the vessel upright when dried out. Bilge pump: a manual or electric pump for draining the bilge. Set at the lowest point, its inlet is protected by a ...
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