Reply by crank49

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Posted on My first dust collector

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4032 posts in 3854 days

#1 posted 08-26-2016 02:48 AM

Beware of CFM ratings that don’t also include a static pressure value to go with it.
One means absolutely nothing without the other.

For example, a high pressure rating without a CFM is probably the maximum pressure with the inlet completely blocked. A high CFM rating without a corresponding pressure rating is probably the maximum theoritical flow without any restrictions; like with no duct work or hoses, not very useful information.

An honest rating would be like: 600CFM @ 14” WC. That means the machine can move that volume of air with 14 inches of pressure to create the needed velocity in the duct. There are charts and calculations that can be used to know what that system will actually do. Without both numbers not so much.

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