Metal silicon,
also known as Crystalline Silicon or Industrial Silicon, is mainly used
as an additive to non-ferrous based alloys. Metal silicon
is a product made of quartz and coke in an electric furnace. The content
of silicon in the main component is about 98% (in recent years, 99.99%
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are iron and aluminum. , calcium, etc. Silicon Metal,Metallic Silicon,Crystalline Silicon,Industrial Silicon Ningxia Evergreen Trading Co., Ltd. , https://www.nxevergreen.com
As turbopumps are in some ways more advantageous than cryogenic pumps, ion pumps, and diffusion pumps. Therefore, under normal circumstances, more use of turbopumps. But any vacuum pump has shortcomings, turbo molecular pump is no exception. Next, the advantages and disadvantages of turbomolecular pumps will be described in detail. Turbomolecular pump Turbomolecular pump Advantages: 1, clean, oil-free steam backflow Turbomolecular pump without any trap, according to the rules of operation, will be able to be pumping container to provide a very clean vacuum environment, and does not contain any hydrocarbon Compound. 2, easy to use In many applications, turbopumps do not need high vacuum valves or rough vacuum valves. Just press the button, the pump will be able to start working. From atmospheric pressure can be reduced to the ultimate pressure. The system can be coarse-tuned by turbomolecular pumps and can be accelerated up to operating speed. 3, strong gas delivery Most turbomolecular pumps for the delivery of light gas ability. So it is very suitable for ultra high vacuum process operation. For those hydrogen-rich processes, helium mass spectrometer leak detectors and other applications are available. 4, suitable for the application of ultra-high vacuum A sealed and degassing turbo molecular pump, with good performance of double-stage rotary vane pump (or the same performance of dry-type pump), the ultimate vacuum can generally reach 10- 9-10-10 Torr (ie 133.3--13.33 nPa). 5, good performance under high pressure Some turbo molecular pump inlet pressure can be 10-1 - 10-3Torr (ie 13.33Pa - 133.3mPa) run between. In this pressure range, the ion pump can not be applied, for the cryogenic pump need to throttle pumping speed or regular regeneration, the work of the diffusion pump will become unstable. Turbomolecular pump Disadvantages: 1, the high cost of equipment Taking into account the diffusion pump system requires valves, baffles, wells, valve controllers and pipes, the total cost to calculate the difference between the two is not big, in some cases Under the turbo molecular pump is still a cheaper option. 2, sensitive to particles or sediments Once the accident damage is serious, there will not be a few pieces of reuse. Rebuilt, replacement parts is very expensive. In order to work safety, installed in the pump inlet fine pore filter to protect the normal operation of the pump. 3, noise and vibration From the experience of use, the pump will appear vibration and noise problems, mostly bearing damage and poor balance problems. 4, Broken Problem Some users are afraid to use turbomolecular pump because they are afraid of broken rotor blades. When crushing is normal operation of the pump, the impeller suddenly suffers foreign material or bearing wear and appears broken. 5, exposure to the atmosphere easily lead to accidents such as regulation rupture, the entrance of the pipeline, valves, sealing problems, may suddenly make the vacuum pump inlet exposed to atmospheric pressure. Different types of turbo molecular pump, the ability to withstand atmospheric pressure impact is different. Some pumps are damaged by the blade's resonant bending, but some pumps are subject to atmospheric impact without damage. Turbomolecular pump to have a longer working life and the best running performance, users must follow the operating procedures and procedures, it should play its advantages and to avoid its shortcomings. Related articles: Spool valve vacuum pump advantages and disadvantages Oil seal vacuum pump advantages and disadvantages