Couple of Compressor Newbie Questions.

  1. Submariner1 Member

    Messages:
    100
    Location:
    Berkshire
    1. After the pump has filled the tank it correctly stops at 10 bar, this drops to 9.8 bar in say 10 mins and then stays there (in an unheated garage).
    Is this the hot air just cooling and contracting?
    2. When the pump starts it seems to partially exhaust for a few seconds of running and then seals completely .. is this normal? I.e. a partial delay to let the pump get going?
    3. How long should a B2800B 3 HP 12 cfm pump take to fill a 50L tank from empty?

    apologies for the daft questions, just had a few issues like a faulty leaking PCL air filter and a leaking QR connector; so one starts to question things.

    Life has taught me to check things out when you first get them, because if you don’t sort things out quickly, after getting new stuff ... many suppliers are pretty unhelpful.
     
  2. bourbon Member

    Messages:
    802
    Location:
    Lichfield UK
    Not sure about (1) but (2) yes, there is a short exhaust before It seals to fill the tank. (3) do the maths! although it's a bit awkward with the pump measured in Cubic Feet per Minute and the tank in Litres.
     
  3. zzr1200

    zzr1200 Working at 650 ft on open steel work

    Messages:
    4,038
    Location:
    Glapwell, Chesterfield, Derbyshire.
    1. Probably.
    2. Yes
    3. That depends on a few things:-

    A. Is the unit it new or s/hand?
    B. It depends on the motor speed and the driven speed of the pump unit, ratio.
    C. It also depends on the manufacturer stating the correct built spec..
     
  4. Morrisman

    Morrisman Forum Supporter

    Messages:
    2,722
    Location:
    Staffordshire, England
    Yes, air contracts after it’s been heated under compression.
    Yes, the pause is the unloader working, so the compressor doesn’t start under full load on the position.
    Not to sure about the last one, but several minutes.
     
    addjunkie likes this.
  5. Submariner1 Member

    Messages:
    100
    Location:
    Berkshire
    Thanks
    I think mine was 2 or 3 mins, need to check.
     
  6. Submariner1 Member

    Messages:
    100
    Location:
    Berkshire
    Thanks
    A its new
    B Motor 2,800 rpm? pump 1540 rpm
    C hope so
     
  7. Submariner1 Member

    Messages:
    100
    Location:
    Berkshire
    Thanks
    Maths ... hmmm getting on in years LOL
     
  8. Morrisman

    Morrisman Forum Supporter

    Messages:
    2,722
    Location:
    Staffordshire, England
    My last line should have said piston, not position. Bloody autocorrect.... and Old Speckled Hen.....:rolleyes:
     
    zzr1200 and slim_boy_fat like this.
  9. zzr1200

    zzr1200 Working at 650 ft on open steel work

    Messages:
    4,038
    Location:
    Glapwell, Chesterfield, Derbyshire.
    :thumbup:......:drunk:
     
    Morrisman likes this.
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