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  1. 19-04-2013 #12
    John S's Avatar
    Lives in Nottingham, England, United Kingdom.
    John S
    Last Activity: 23-09-2017 Has been a member for 9-10 years. Has a total post count of 2,073. Received thanks 140 times, giving thanks to others 45 times. Referred 1 members to the community.
    You have basically answerd your own question when you state 4.2cfm FAD which means Free Air delivery. because they don't have a swept volume like a piston compressor they have to state what they put out.

    CFM means sod all, CFM is the swept volume x revs in one minute and doesn't take into account valves opening and closing which is when the proper work is done.

    Read this.

    The "power" of an air compressor
    John S -
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