Vacuum Pumps
Manufacturer and exporter of vacuum pumps from Toptime Group Co.,Ltd. which a very famous electric & industrial foreign trade Company in China. It has 4 important subsidiaries, which covers the products of electrical appliances, pump & valve, auto fittings and building materials. We can offer you the most superior vacuum pumps products on the market today and you also can feel free to tell us your requirement about vacuum pumps.
A vacuum pump is a pump that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. The vacuum pump was invented in 1650.
Vacuum pumps are combined with chambers and operational procedures into a wide variety of vacuum systems. Sometimes more than one pump will be used (in series or in parallel) in a single application. A partial vacuum, or rough vacuum, can be created using a positive displacement pump that transports a gas load from an inlet port to an outlet (exhaust) port. Because of their mechanical limitations, such pumps can only achieve a fairly crude partial vacuum. To achieve a more-perfect vacuum, other techniques must then be used, typically in series (usually following an initial fast "pump down" using a positive displacement pump). Some examples might be use of an oil sealed rotary vane pump backing a diffusion pump, or a dry scroll pump backing a turbomolecular pump. There are other combinations depending on the vacuum quality desired.
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