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One of Hoffman's key customers enquired whether it could provide a vacuum system that would work with pumps other than Edwards'. Hoffman informed Edwards whose response was to suggest purchasing Hoffman. Information was provided about Hoffman to Edwards for due diligence, under a non disclosure agreement, in order to progress the acquisition ...
1939 F.D. Edwards begins manufacturing vacuum equipment. 1955 The company acquires Alto Vuoto SpA, a freeze drying manufacturer in Italy. 1968 The company is acquired by BOC, after staying in private hands through the post-war period and until the 1960s when it went public.
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.
Single-stage vacuum pumps typically produce vacuum to 35 torr (mm Hg) or 47 millibars (4.7 kPa), and two-stage pumps can produce vacuum to 25 torr, assuming air is being pumped and the ring-liquid is water at 15 °C (59 °F) or less. Dry air and 15 °C sealant-water temperature is the standard performance basis, which most manufacturers use for ...
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Edwards has over 3,200 full-time employees and 500 temporary workers operating in approximately 30 countries worldwide engaged in the design, manufacture and support of high technology vacuum and ...
The term "roughing pump" derives from the vacuum range it works in, "rough vacuum", above 1x10 −3 torr (0.1 Pa). Pumps that operate in the high vacuum ranges typically don't operate, or only operate inefficiently, at atmospheric pressures, whereas pumps that work efficiently at atmospheric pressure usually cannot produce a vacuum lower than ...
A vacuum ejector, or simply ejector, or aspirator, is a type of vacuum pump, which produces vacuum by means of the Venturi effect.. In an ejector, a working fluid (liquid or gaseous) flows through a jet nozzle into a tube that first narrows and then expands in cross-sectional area.
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