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  1. #144
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    Hint
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  2. #145
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    It must be the 4000 dollar pump that pulls below 0 with ease that you can tolerate using the small dia. hose and overcomes the poor conductance speed of those small lines. Expecially that Y/J hose that is more like than ⅜

  3. #146
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    Quote Originally Posted by itsiceman View Post
    It must be the 4000 dollar pump that pulls below 0 with ease that you can tolerate using the small dia. hose and overcomes the poor conductance speed of those small lines. Expecially that Y/J hose that is more like than ⅜
    We get pumps at distress prices.
    This one is one of the well used ones. Does 6.
    But it was on site from a big 30 min pull down.

    But the seal overheated (can get to that later).
    The 10mm hoses are ok for a quickie on the compr while the coupling is got ready. Especially if you consider the outgassing of the oil is free purge gas...

  4. #147
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    Bubbles the vacuum gauge!

    What goes in must come out.
    One bubble every 8 min means under well under 500 mics.
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    Blank off for a while, say Lunch, open back up, I get the same rate. Done.
    Your setup may vary due to pump capacity & ultimate vacuum, but doing this while your have a gauge on will let you discover your tend.

  5. #148
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    You will see a constantly reducing rate ( time increasing ) on a leak free system.

  6. #149
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    How Edwards does a 5 CFM pump. 4.7 actual.
    Bought in 1991, rebuilt 600.00. Pulls 8 mics still.

    The CPS will not recognize the wet oil during a blankoff.
    At other times it is way high. It is always powering off. I have 120v, why would I want something shutting off when I need it the most?
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  7. #150
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    Is that Hastings Gauge similar to the Thermal Engineering as far as accuracy?

  8. #151
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    Quote Originally Posted by itsiceman View Post
    Is that Hastings Gauge similar to the Thermal Engineering as far as accuracy?
    It feels like it is. Lol. I used a T on my first job. Its cheesy .Not sure. Mine too if I look at the grapefruit can.
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  9. #152
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    It is more accurate, with the calibration tube especially

  10. #153
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    http://www.teledyne-hi.com/products-...rol/dv6-series

    Found it
    Says 15%

    I'll try and dig for the thermal but they give different %'s at different levels of vacuum

  11. #154
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    I removed the flange port and replaced it with 5/8 flare.
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    There is not better place for the working men than the union! 100% UA the only HVAC union!

  12. #155
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    Is there a reason we are still using vacuum pumps that are filled with oil?

  13. #156
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    Quote Originally Posted by valdelocc View Post
    I removed the flange port and replaced it with 5/8 flare.
    Is that a Milwaukee Vacuum?

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