Oil-sealed vacuum pump is a device to obtain the vacuum, the vacuum pump has the characteristics of oil plays an important role, which combines sealing, lubrication and cooling of the three kinds of performance. Its status in the industry is more and more prominent. People will be more attention on the understanding of the advantages and disadvantages of oil-sealed vacuum pump. Oil-sealed vacuum pump seal vacuum pump advantages: 1, oil-sealed vacuum pumping speed, the work efficiency is relatively high. 2, oil-sealed vacuum pump small size, easy to use. 3, oil-sealed vacuum pump ultimate vacuum high. 4, oil-sealed vacuum pump low noise, for the construction staff is very useful. Disadvantages of oil-sealed vacuum pump: 1, not suitable for pumping high oxygen gas. 2, not suitable for extracting explosive gas. 3, is not suitable for pumping containing gases that are corrosive to ferrous metals. 4, not suitable for pumping gas containing the pump seal oil from the chemical role. 5, not suitable for pumping gas containing and containing dust particles. It is necessary to understand the characteristics of the oil-sealed vacuum pump used in our country. It should not only pay attention to its advantages, but also pay attention to his shortcomings and avoid weaknesses so that it can play its greatest role. Related Articles: Oil-sealed vacuum pump Features Oil-sealed vacuum pump working principle and structure

CuW alloys are used where the combination of high heat resistance, high electrical and thermal conductivity, and low thermal expansion are needed. Some of the applications are in electric resistance welding, as electrical contacts, and as heat sinks. As contact material the alloy is resistant to erosion by electric arc. WCu alloys are also used in electrodes for electrical discharge machining and electrochemical machining.


Copper–tungsten (tungsten–copperCuW, or WCu) alloy is a pseudo-alloy of copper and tungsten. As copper and tungsten are not mutually soluble, the material is composed of distinct particles of one metal dispersed in a matrix of the other one. The microstructure is therefore rather a metal matrix composite instead of a true alloy.

Copper Tungsten Alloy Switch Contacts

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