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How do you convert microns in air filtering to grains of weight?
Wiki User
∙ 14y ago
There is no direct conversion from microns to grains of weight. A micron is a measure of distance equal to one millionth of a meter. In air filtering this is the dimension of the diameter of the particle. Grains are measures of weight. You can't determine the weight of say a 5 micron particle unless you know what the particle is made of.
It is even difficult to express any average since the material captured in an air filter in Arizona will be much different than in Los Angeles.
The volume of a spherical particle is
So the volume of a particle with diameter 5 microns = 6.54 cu-microns or
6.54 x 10-17 cubic-meters
If the material was silica sand with a density of 2.17 Mg/cu-m you would have
1.42 x 10-10 grams. 1.0 gram = 15.43235 grains
So a 5 micron particle of filered sand = 2.19 x 10-9 approx 2.2 billionths of a grain
Wiki User
∙ 14y ago
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