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  1. #118
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    Not pump!
    Your flexy hose to system! Sorry I did cloud ☁ up my post.
    Drill out straight adapters, is what I mean

  2. #119
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    Quote Originally Posted by skwoodwiva2 View Post
    For regular .25 flares, I hollow out a straight VJ seal right to 7/32 so only the outer oring is sealing, no guts. Then do the same for all your .25 ports too. Like the cross you just pic'ed.
    Get it? More flow going from maybe 3/16 vs nearly .25!
    Quote Originally Posted by skwoodwiva2 View Post
    Not pump!
    Your flexy hose to system! Sorry I did cloud ☁ up my post.
    Drill out straight adapters, is what I mean
    The Appion " fittings that I used on the 1" hoses are full flow already. Actually the ID of the " gasket is the smallest choke point


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  4. #120
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    my Daddy's is bigger than.....

    More flow.
    Plus if you drill the unit access too you get even more.
    Put a access Tee on top when done
    Attached Images Attached Images  

  5. #121
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    I've had too many bad experiences drilling out a bigger hole in soft metal. Is that really worth the effort? Seems like splitting hairs. If going through the trouble on a unit I could see adding a larger dedicated evac port on a system.

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  7. #122
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    Quote Originally Posted by skwoodwiva2 View Post
    my Daddy's is bigger than.....

    More flow.
    Plus if you drill the unit access too you get even more.
    Put a access Tee on top when done
    Have you ever figured the conductance speed of those little hoses?
    With those big pumps you have drilling out any fittings is of little significance compaired to the small hoses attached to them IMO

    A 6ft " ID hose will allow for 2.75cfm at 100 microns

    A 6ft 1" ID hose will allow 21cfm at 100 microns

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  9. #123
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    Quote Originally Posted by itsiceman View Post
    Have you ever figured the conductance speed of those little hoses?
    With those big pumps you have drilling out any fittings is of little significance compaired to the small hoses attached to them IMO

    A 6ft " ID hose will allow for 2.75cfm at 100 microns

    A 6ft 1" ID hose will allow 21cfm at 100 microns
    Do you actually use those spiral hoses in the field or are they just for bench testing? Looking for a faster way to pull down big units 20+ tons

  10. #124
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    It's faster for any size units. I use these on systems that hold ozs.

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  12. #125
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    It's faster for any size units. I use these on systems that hold ozs.[/QUOTE]

    Those are bad azz. Do you have a post on here about how to make those? I've search a little off my phone but haven't found like a full process on them. Thanks

  13. #126
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  15. #127
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    Thank you

  16. #128
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    Had to replace a worn gasket. Here's without the gasket or knurled cap.



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  18. #129
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    so, stupid question, but Ive always assumed Id be better off with a 3/8 hose going into a 3/8 access when possible over my 1/2 hose going into a 1/4 access. Thoughts?

  19. #130
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    That's not stupid.

    As with anything; good flow results from lower restriction to flow. So, as far as larger fittings and hoses are less restrictive; they are 'better'.

    What do you mean when you say "I'd be better off" ? What would be better? Faster? Lower? More impressive? <g>

    I have long speculated about pump CFM ratings being almost meaningless at anything below about 25". I have a shelf of big vacuum pumps but 99% of the time I use a little one that is rated at 2 CFM. <g> I haven't weighed it but I would guess it weighs about 5 lbs.

    I always do the piping first and set up the vacuum pump then. All you should be pumping out is fresh dry nitrogen. Then by the time I'm ready-to-start the micron gauge is down. If not; it's always break time anyway. <g>

    PHM
    --------


    Quote Originally Posted by Shreadhead View Post
    so, stupid question, but I’ve always assumed I’d be better off with a 3/8 hose going into a 3/8 access when possible over my 1/2” hose going into a 1/4 access. Thoughts?
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

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