Explanation of dust extractors

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graduate_owner

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Hi everyone,
can anyone explain to me why the large chip extractors are high volume low pressure?

They are driven by fairly substantial motors, say 3/4 to 1 HP induction motors, and have impellers of, say 8". Dust extractors have smaller impellers and are driven by motors of 1100W (presumably input power), often brush motors, and are low volume high pressure.
So why the difference? If a HVLP extractor was fitted with a small impeller, would it be then LVHP? What would happen if one of these chip extractors had a bigger motor and a bigger impeller - would it still be HVLP?
In other words, what is it that makes an extractor HVLP or LVHP? And would it be possible to combine some of the features of both and make a high volume high pressure? - Two motors? Two impellers, one large and one small?

Does anyone have any information on this?

K
 
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