How many CFM from my Speedaire model 3Z406

by Ron
(Connecticut)

Does anyone know how many CFM my Speedaire model 3Z406 compressor will deliver at 40 and 90 PSI? How about the capacity of the tank?

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Jun 16, 2015
40 PSI
by: Bill

Sometimes compressor vendors will highlight the CFM output of a compressor at the 40 PSI pressure as there will be less flow at 90 PSI.

Most folks are using 70+ PSI in their air tools, so the 40 PSI figure is - in my opinion - a gimmick.

The CFM page on this site provides a 'rule of thumb' guide about how much flow per horsepower of motor on a compressor.

If you review the information on this site about tanks, you will find the formula to figure out the tank capacity.

Jun 15, 2015
specs
by: Doug in s.d.ca

Guesstimate, and pay no attention to 40psi.

Typically, 3-4 CFM/HP (from motor tag rating).

Measure the tank and do the math.

Either the motor or the pump may not be original or working at full capability.

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