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Thread: DC Duct Length Below Cyclone

  1. #1

    DC Duct Length Below Cyclone

    I'm setting up a two stage system and in my work area, it's logical for the impeller and cyclone to be very high up on my wall, but I would still like easy access to my sawdust barrel that sits under the cyclone. Does the length of the ducting that runs from bottom of the cyclone to the barrel matter? I know that everywhere else in my system every foot length of duct matters, but in this case, it is literally just a gravity drop of the dust being dropped from the cyclone? Would a 4-6 ft pipe there cause a problem with the airflow of the other components? Doesn't seem like it would but when it comes to airflow dynamics, I've been very wrong before...

    Thanks.

  2. #2
    You must have high ceilings. My ceiling is 9' and I have maybe a foot of flex between the cyclone and the drum. If you use a clear pipe it will give you a good view of your barrel filling up if it is accessible from your shop. I hang a trouble light behind my hose so if it gets full when I am planing lumber I can see it.

  3. #3
    Join Date
    Feb 2010
    Location
    Woodstock, VA
    Posts
    794
    Mine is set up like that, as long as it's sealed it's good.

  4. #4
    Join Date
    Mar 2003
    Location
    SE PA - Central Bucks County
    Posts
    49,988
    It can be as long as you need it to be with no issue...with the proviso that's already been mentioned: It must be absolutely sealed. Even a tiny pin-hole can cause havoc.
    --

    The most expensive tool is the one you buy "cheaply" and often...

  5. #5
    Thanks for the information on sealing. I knew that sealing was important but I didn't realize that it was quite THAT important. I'll be sure to take precautions.

  6. #6
    Join Date
    Mar 2003
    Location
    SE PA - Central Bucks County
    Posts
    49,988
    Just to add to your confidence, I helped a local friend install her Oneida cyclone in the upstairs of her shop building. The barrel is on the floor in the actual shop. So the duct from the cone to the barrel is 8+ feet long. (High ceiling in the shop)
    --

    The most expensive tool is the one you buy "cheaply" and often...

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