Dust Collection Ducting Suggestions?

Todd:
Sounds like you have too much pipe running for the draw of that 2 hp machine.
Is there any way you can run one single line with 6” drops to the machines? You can transition the 6” drops real close to your machines.
It would be best to try to eliminate as much of the corrigated pipe as possible as it creates turbulance.
Can you line up the majority of your machines in one long row?
It’s hard to advise you without seeing your floor plan
As for the pipe, it dosent really matter except pvc is more prone to static build up and can be annoying but not dangerous. The advantage I see with it is that it is cosmetically more acceptable and the sweeps are better than with traditional hvac piping.

Bob

-- A mind, like a home, is furnished by its owner

Penn State has this chart showing different layouts for ductwork. I’ve also seen charts showing the friction loss of various fittings, to get the best suction also.

Another thing, if you go to large sized pipe you lose velocity

Here’s the chart: http://www.pennstateind.com/duct_assist.html

I looked up static loss in ductwork on Google. This is one site that may help you. http://www.airhand.com/designing.asp

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN. http://www.woodcarvingillustrated.com/gallery/member.php?uid=3627&protype=1

WOW.. Great links.
Ranter than start another post can I also get your thoughts?

I was going to run some 4’ PVC in my shop ceiling from a Jet DC-1100RCK and knew I should try to figure out the best solution but never gave it much thought until now.

Random thoughts-
-vacuum runs at 1100 CFM
-My largest tool runs at about 500 CFMs (8 ” jointer)
-Shop is about 20X20 making about a 40 run my max distance connecting to the jointer 25 ” in the ceiling (8” up and 8” down)

my guess is if I ran the 4” pvc I would be ok.
What do you think?

-- "so much to learn and so little time"..

If your Cyclone has a 6” intake, I’d use 6” for your main line, branch off from there with 4” to the tools.

I recently revamped my DC, & used metal pipe I bought at a local hardware store, it was fairly reasonable. One thing nice about buying local, I picked up more parts that I planned for , just in case I changed plans while installing. When I was done I brought back what I didn’t use, no problem.

The intake on my DC is 5” so I ran my main at 5”. Take a look at my blog.

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN. http://www.woodcarvingillustrated.com/gallery/member.php?uid=3627&protype=1

I would love to upload a picture of the lay out of my shop on here. But apparently I don’t understand how to do it…

-- Todd

Lets see if this works
http://i221.photobucket.com/albums/dd127/tknne/shopwtools.jpg

-- Todd

Hi Todd:
Is the length of your shop 32 feet or 36 Feet?

The top of the drawing says 32 and the bottom adds to 36?

Bob

-- A mind, like a home, is furnished by its owner

It sure is a nice layout.

I just started a new thread on Dust Collectors.

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN. http://www.woodcarvingillustrated.com/gallery/member.php?uid=3627&protype=1

Hello All,
Hey, If you want to know what Bill Pentz says about my system and about how to correct some problems, please go to my blog site. I believe he has some helpful information on there. Thanks. I hope he helps you as much as he has helped me. Todd

-- Todd

Hmmm? You kind of tossed me a curve on this one.

You stated at the outset that you had a budget of $600.00

”My next move is to buy a dust collector. My budget is $600, which includes all the accessories. I plan to spend $400 on the DC and $200 on hosts, a remote control, and a dist hood with stand.”

The recommendations you have accepted now are for much more $$$.

This kind of makes anwering questions like this one a bit of a thankless task.

Perhaps I should have just said Google Bill Pentz. <g>

Cheers

Bob

-- A mind, like a home, is furnished by its owner

Hi Bob,
With a shop like Todd has, I think he’s doing the right thing, even though he’s going over his budget, it’s going to pay off for him in the future.

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN. http://www.woodcarvingillustrated.com/gallery/member.php?uid=3627&protype=1

I agree with you Dick, but that was not the question asked.

Why choose a budget at all if you are just enquiring about a project?

It certainly changes the responses one can get.

Bob

-- A mind, like a home, is furnished by its owner

Well, he started at the top of his shop but when he got to the bottom he had more space so he had to find a way to spend more money.
Or maybe it just seems like it takes more space to work metal.
Does that make his shop an expansion joint?

-- No piece is cut too short. It was meant for a smaller project.

Hey Bob,
These friction, cfm ers and the sp ers have me going nuts when they talk about all this suction garbage!
They all talk in circles. This is what I am hearing:
You should do this, but they don’t recommend you doing it because you can use that, but they wouldn’t recommend that because I recommend you do this, but don’t ever do that because you should do this, because the other thing didn’t work right the first 50 times they tried it!!!!! So, take our recommendations and multiple them by what the heck did you say and you will get the exact machine, cfm and s.p. needed to not perform anything you need it to do!!!!!

I have 8 years of college, a B.A. in Biology, A.D. in Prehospital Emergency Medicine, and you think I can make heads or tails of this stuff. Anyway, I went through and figured out all the numbers I am supposed to figure out for this stupid dust collector. This is what I came up with. My machine is a Grizzly G0440 with the following: Suction Capacity of 2.5” S.P. @ 1354 CFM, with the max S.P. being 10.4.
Now, with just about everything added up, I get a 188’ of linear measurements (with all 6”, including the elbow straight pipe conversion stuff). So, if you know that you have 4.5 S.P. for every 100’ at 4,000 FPM with 6” pipe, than 188’ would be 4.5/100=x/188 which gives you 8.46 S.P. This would be the maximum worst case scenario.

There you go. That was easy wasn’t it?

-- Todd

Todd;
You forgot to take into consideration the altitude and and the current ground temperature. <g>
You might also want to allow for the line current in you area and that actual vs expected rpm of the motor.
All this stuff is fun for certian personalities and back grounds but… sooner or later you have to fish or cut bait.
I note that most of these techno geeks don’t have a shop to demonstrate how their theories actually improve the air quailty.
That being said, they do provide a benchmark and a lot of their advice is usable.

So in a practical sense.
1. Keep the runs short. If you can centralize either your equipment or the blower assembly you will be dealing with shorter runs.
2. Let the impeller breath- don’t restrict the flow.
3. Buy the best 2 hp or better system you can afford.
4. Keep the leaks to a minimum.
p.s. you will be hard pressed to find a 2 hp single or dual stage with an S.P. of 8.46 so you are pretty safe with any of them.
More $ generally buys better quality but not more S.P. for a give HP.

Cheers
Bob

-- A mind, like a home, is furnished by its owner

Great summary Bob. Thanks

-- "Functional WoodArt" by Debbie, Canada (http://www.execulink.com/~yohan)