1. Name Calling or general rude behavior is no longer acceptable in the Cafe, We are adults which means that we should be able to debate without resorting to name calling. Warnings will be given out if users fail to act appropriately.

vacuum pump problems.

Discussion in 'Concentrates and Extracts' started by vacpurge, Jun 19, 2013.

  1.  
    vacpurge

    vacpurge New Member

    soo.

    ive had some oil in the chamber for about 5 days straight now. under full vacuum. I went to check it out and maybe try pulling on it a bit more because of the degassing. I always turn the pump on FIRST and THEN open the ball valve up. this time I did and the gauge dropped right down to like 19"... that was as much as the pump could handle!!!

    soo. is my 109$ pump all of a sudden worn out? or could it be the oil, which I recently changed....?

    weird, I worked fine 5 days ago, did nothing but sit outside in the nice temp, now it wont pull a decent vacuum.. wtf????
  2.  
    chuck estevez

    chuck estevez Well-Known Member

    is the pump oil dirty looking?
  3.  
    vacpurge

    vacpurge New Member

    yeah its a little foggy lookin.
  4.  
    chuck estevez

    chuck estevez Well-Known Member

    in hvac, when the oil gets contaminated, the pump doesn't work as well, frequent changes are recommended.
  5.  
    vacpurge

    vacpurge New Member

    crazy. the first oil I used worked for months! like 50 pulls!!! this stuff is 1 month and maybe 15 pulls! ill change and let ya know. thanks.
  6.  
    vacpurge

    vacpurge New Member

    well.. im an idiot.


    in order to stop the chamber from somehow pulling oil back into the chamber through the ball valve, I usually unhook the line from the vacuum pump!!! I forgot it was unscrewed all the way on and just sitting there.. im surprised I was even able to pull a 19" vacuum!

    so, here another question. all my fittings are threaded, simple. 1/4" I believe. could I get a 1/4" threaded check valve, or another ball valve so that I got two of them to stop the chamber from pulling my pump oil back into the line? it somehow gets my vacuum pump oil to sit on the CLOSED ball valve... so when I open the ball valve, a few drops of oil drip into the chamber. wtf??? is my ball valve not holding? the vacuum level seems fine..
  7.  
    Fadedawg

    Fadedawg Well-Known Member

    The line from the pump to the valve is under vacuum when you shut it off and will pull some oil from the pump. If that is a problem, you can shut the valve and disconnect the line before shutting off the pump, or put the valve closer to the pump.
  8.  
    vacpurge

    vacpurge New Member

    ah! that makes sense, I never thought of after the valve still being under vacuum.

    so even if I jut unscrewed it from the pump real quick, then screwed it back on would get rid of the vacuum so its ready to use for next time?
  9.  
    Guzias1

    Guzias1 Well-Known Member


    yup, you are closing off the chamber right at your lid, anything between that and your pump is under vac, unless released (IE. remove hose from vac)

    i would only do so on long purges. initial quick purges usually dont need this if you are closing off the chamber correctly..
  10.  
    Fadedawg

    Fadedawg Well-Known Member

    Correct, if you close the valve and then unhook the hose before shutting off, you won't be aspirating any oil from the pump.

    You can also install a valve closer to the pump, so that the vacuum reservoir (plenum) produced by the hose is smaller.

Share This Page