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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).
The process was inefficient and unrewarding at first, but he improved it by making the vats leakproof, providing moveable covers to keep out the rain and installing a salvaged bilge pump to draw water directly from the sea via leadlined wooden pipes.
The infamous Eastern Han court eunuch Zhang Rang (d. A.D. 189) once ordered the engineer Bi Lan (畢嵐) to construct a series of square-pallet chain pumps outside the capital city Luoyang. [14] These chain pumps serviced the palaces and living quarters of the Luoyang; the water lifted by the chain pumps was brought in by a pipe system. [14]
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 ...
Bilge water is a nearly-unavoidable byproduct of shipboard operations. Oil leaks from running machinery such as diesel generators, air compressors, and the main propulsion engine. Modern OWSs have alarms and automatic closure devices which are activated when the oil storage content of the waste water exceeds a certain limit(15ppm : 15 cm3 of ...