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  1. #11
    John could we get a bit more real life usage of the hydrovane 5 series.

    I've been looking on ebay for some time now and they do come up often for around 300, which I don't mind paying, but when I read the specs of the 501, it only produces 4.2 cfm FAD. Seems crap against say a 300 secondhand 150ltr Sealey/Abac/Clarke with 14cfm. Would the 501 easily allow for some spray painting, blasting, sanding. Could it even be used for blowing chips away.

    Feel like I have to look at a big 3 phase hydorvanes to get any where near descent Ccfm. But then these are a huge step up, with ratings of 20+ cfm.

    Are the hydrovane and regular compressor cfm's not comparable?

    Cheers Adil

  2. #12
    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 -

  3. The Following User Says Thank You to John S For This Useful Post:


  4. #13
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 2 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,837. Received thanks 192 times, giving thanks to others 5 times.
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    Last edited by m_c; 20-05-2014 at 10:25 PM.

  5. #14
    What you have to do with the tankless units is put them on a tank and run them up to see what pressure they spit out before they unload.

    Then fit a pressure switch, machine mart are reasonable for these, and set it for 10 pounds less than the test pressure, this way they perform the same as the tank model.
    John S -

  6. #15
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 2 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,837. Received thanks 192 times, giving thanks to others 5 times.
    1234567890
    Last edited by m_c; 20-05-2014 at 10:25 PM.

  7. I had a 14cfm twin piston compressor and yes it could kick out 14cfm when the tank was full thats bout it. then i landed on a nearly new Abac 50+cfm jobby and that will do a proper continuous 50 cfm and its alot quieter than the old turd.

  8. #17
    Quote Originally Posted by AdCNC View Post
    and its a lot quieter than the old turd.
    Adam,
    There is no need to get offensive, I can't help getting old................
    John S -

  9. #18
    I will have to look for another air compressor now, I have had an el cheapo model for years & it has been great for the things I was using it for, few air tools, bit of spraying, nail gun & blowing up the car tyres was about all it got used for.
    Now I have built the blast cabinet it's just to small to handle the flow required at the correct pressure.
    Still having read this thread at least I have a better idea what to look out for now.

  10. Lol John how did you know i was talking about you :-p

  11. #20
    Hope this isn't classed as a hijack it is about air compressors lol.

    Read what John was saying about compressor outputs & that he had said to look out for hydrovane series 5 units but I'm not sure if something that size would do for the blast cabinet, the 5 series from what I can see chucks out about 5 cfm & the blast cabinet needs a minimum of 7 cfm @ 80 psi, more would be better.
    Realise from Johns post that those figures might not mean a lot so needing a bit of help with what might be suitable without having to take out a loan.

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