Material for Gas Meter and More Applications

As the gas is usually compressed, there is more austere requirement for the valves.
Firstly, leakage is permitted but should be constant so that the amount could be
adjusted to required reading tolerance. Secondly, the gas meter would be use for
at least ten geezerhood in a family so that the valves should be kept with small deformation
during the working period. Thus the oil or grease is non suitable for the circumstance
because they would degrade after so long time. Furthermore, the actual for the
valves should be stable enough to suer ten-year work. Wear is a process of removal
of material from one or both of 2 unfaltering surfaces in solid-state contact. It occurs
when solid surfaces are in sliding or rolling motion relative to all(prenominal) other. In well-
designed tribological systems, the removal of material is usually a very slow process,
but it is very steady and incessant [ 1, Bharat Bhushan and B.K. Gupta, (1991) ].
Therefore, the material should be both self- be, wear-resist and deform-resist.
Solid lubricants are used when liquid lubricants do non meet the requirements.



These
lubricants do not displace the conventional oils and greases but provide successful
lubrication in unknown situations, such as at very high temperature, in cryogenics,
down the stairs very high vacuum, in nuclear applications, under extreme loads, and in chem-
ically reactive environments. The maximum useful temperature of solid lubricants
depend strongly on the constituents of the environment, the required life at temper-
ature, and such factors as oxygen availability at the lubricated surface, air
ow rates,
lubricant particle size, and addition of adjuvants and binders [ 1, Bharat Bhushan
and B.K. Gupta, (1991) ].If you want to get a full essay, order it on our website: Ordercustompaper.com



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