There are basically two types of technologies used in vacuum pump system namely the gas transfer system and the gas capture technology. The gas transfer technology operates respectively by transferring the gas molecules either through kinetic action which is called momentum exchange or through positive displacement. In the process of gas molecule removing from the chamber, usually the same quantity or numbers of molecules are discharged from the chamber in comparison to the gas that enters into the chamber and when expelled from the chamber the gas normally comprises slightly high pressure in comparison to the atmospheric level of pressure. The terminology used for the ratio of outlet pressure or exhaust pressure in comparison to the obtained lowest pressure is compression pressure. If you are seeking for a best and appropriate vacuum pump for your scientific applications or research, contact Harvest Right freeze dryers for best, affordable and reliable vacuum pumps.
The principle of momentum transfer is used in the kinetic transfer vacuum pumps which eventually directs the gas to the outlet of the pump in order to give higher possibilities of the molecules to move forward to the outlet using introduced vapour or high-speed blades. The kinetic vacuum pumps normally do not comprise sealed volumes but ultimately achieve a higher ratio of compression at lower pressure.
On the other hand, the positive displacement transfer vacuum pump operates by trapping mechanically to a volume of gas and eventually moving the same through the pump. These types of vacuum pumps are normally designed in various or numbers of stages. In the process of operation, the isolated volume of positive displacement vacuum pump system is usually compressed into a smaller volume against a higher pressure. Finally, the compressed gas either removed to the next pump or expelled to the atmosphere. In most positive displacement transfer vacuum pump system two transfer pumps are normally used in order to generate higher vacuum and enhanced flowrate.
In the case of capture vacuum pumps, the operation is done by capturing the molecules of gas from surfaces in the vacuum system. Eventually, the capture vacuum pump system operates comparatively at lower flow ration in comparison to transfer vacuum pump system. In spite of operating at a lower rate of flow, the capture vacuum technology produces ultra-high vacuum up to 10-12 torr and effectively generates oil-free vacuum. The capture vacuum technology has no moving parts and uses cryogenic condensation, chemical reaction or ionic reaction.