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The Sprengel pump is a vacuum pump that uses drops of mercury falling through a small-bore capillary tube to trap air from the system to be evacuated. [Note 1] It was invented by Hanover-born chemist Hermann Sprengel in 1865 while he was working in London. [3] The pump created the highest vacuum achievable at that time, less than 1 μPa ...
Lightweight hand-held vacuum cleaners, either powered from rechargeable batteries or mains power, are also popular for cleaning up smaller spills. Frequently seen examples include the Black & Decker DustBuster , [ 26 ] which was introduced in 1979, [ 27 ] and numerous handheld models by Dirt Devil , which were first introduced in 1984. [ 28 ]
2. Bissell Handheld Vacuum. Most Powerful . While we could give a standing ovation to this vacuum’s 50,000-watt suction and pet hair cleaning capabilities alone, we’d say its motor-powered ...
In the field of oil regeneration and re-refining, vacuum pumps create a low vacuum for oil dehydration and a high vacuum for oil purification. [44] A vacuum may be used to power, or provide assistance to mechanical devices. In hybrid and diesel engine motor vehicles, a pump fitted on the engine (usually on the camshaft) is used to produce a vacuum.
Furthermore, vane pumps can be used in low-pressure gas applications such as secondary air injection for auto exhaust emission control, or in low-pressure chemical vapor deposition systems [citation needed]. Rotary-vane pumps are also a common type of vacuum pump, with two-stage pumps able to reach pressures well below 10 −6 bar.
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