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Can use some DC suggestions please

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Forum topic by jesinfla posted 04-19-2015 04:05 PM 967 views 0 times favorited 20 replies Add to Favorites Watch
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jesinfla

274 posts in 605 days


04-19-2015 04:05 PM

Topic tags/keywords: dust collection

I’m in the process of laying out my dust system (diagram below) – I’m sure this won’t be my final layout, but until I get better at this, this is what it is.

Being on a tight budget I’m using 2” pvc pipe, 2 1/2” hose (from amazon) and 3” hose clamps and lots of duct tape LOL. I make my own connectors for joining the hose to the pvc pipe using 4” pvc cuts and PVC T connectors – seems to be working fine at the moment.

Anyway…

I’ve been looking at various layouts etc and one thing I notice is some of them have gates to turn on and off the flow of air to various stations.

I’m assuming this is to maximize the airflow (vac pressure?) to the stations that are currently in use?

If that is correct, using my diagram below and using the VAC as the starting point – would I insert gates:

1. Just after the VAC T connector – for the Table saw.
2. Just after the T connector Misc – I use this for a router table, jig saw table, and hand drilling on the work bench etc. (I don’t have a bench drill anymore)
3. Just after the T connector for the sander

I know there is a lot of pipe between the sander and the miter saw, but that’s just how it worked out. Normally, my bench drill would sit in the corner between the sander and the miter saw.

Thanks as always in advance for the advice – it is greatly appreciated

-- They said I could be anything... So I became Sarcastic! They also said making drawers is easy... I think they lied :(


20 replies so far

View kdc68's profile

kdc68

2526 posts in 1744 days


#1 posted 04-19-2015 07:31 PM

I’m no expect at dust collection, so take my advice with a grain of salt…...
v
You should probably use “Y’s” (wye’s) instead of “T’s” because of less restriction of air. Everywhere except at the Vac location. I don’t know an appropriate PVC fitting to go in opposite directions from the Vac except for maybe a double “Y” (wye) ??

I would have a blast gate on both sides of the “T” at the Vac area. That way you can utilize all the suction at the table saw when using it. Close it when you are working at the bench, sander, or miter saw.

There should be two blast gates at each tool location. One for the tool, the other for the run.

>When using the work bench you can close the gate in the run going to the sander and miter saw.

>When using the sander, you can close the gate to the bench and the gate in the run going to the miter saw.

>When at the miter saw, have the gates closed at the bench and sander. Open all gates in the run from the vac to the miter saw.

>All these scenarios the blast gate to the table saw is closed

You should probably use two 45’s in each corner or a long sweep 90 instead of a standard 90. Don’t want too many sharp bends. Connect a 45 on each end of a short piece of PVC to form the bend.

That is a long way around your workshop to reach your miter saw, which happen to be a very difficult machine to collect dust.

To me, by the time you purchase all the PVC pipe and fittings to go around the shop from the sander to the miter saw you could buy a cheap shop vac just for the miter saw and place it by the fan.

End the first run at the sander and eliminate everything from behind the sander around 2 corners to the miter saw. Your layout is better suited for a dust collector. Probably more than 1 shop vac can handle effectively.
v
Hopefully someone that “knows” dust collection can chime in…..good luck

-- Measure "at least" twice and cut once

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rwe2156

2198 posts in 948 days


#2 posted 04-19-2015 09:15 PM

When you say “vac” is it a shop vac?
If so, it will not work for a DC system like you have designed.
It simply does not have the CFM’s.

If it is a standard DC, then:

1. The ducts are too small. Absolute minimum is 4”, 6” best.
Use DWV (thin wall).
You’ll need at least an 800 CFM DC, 1000 better 1400 best. That puts you in the 1 1/2 – 2 HP range.

2. Your layout need some tweeking.
a. the 2 90’s are going to impact your air flow.
b. I would come off the DC with a couple 45’s and run a main duct down the center, branching off as needed.
c. The sander, TS and MS are fine dust producers and its best to have them closest to DC.

3. Optimize air flow
a. use 2-45’s with a short section of pipe for 90’s.
b. use Y’s for your branches.
c. 4” for your drops. You can use flex duct to the machines it will fit right over 4” pvc.
d. don’t glue the joints. screw or rivet and tape to seal.

-- Everything is a prototype thats why its one of a kind!!

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Bill White

4458 posts in 3427 days


#3 posted 04-19-2015 10:09 PM

Mr. Engel speaks with much wisdom Grasshopper.
Bill

-- bill@magraphics.us

View jesinfla's profile

jesinfla

274 posts in 605 days


#4 posted 04-19-2015 11:00 PM

Thanks all – yes it’s a normal shop vac – it’s all I have at the moment

I like the idea of a main duct down the center and branching off that – I’m going to draw that up.

Unfortunately, the shop vac is the best I can do at the moment. Being new to this hobby, I don’t want to/can’t spend a lot of money on things – I’m using wood I’ve had laying around for ever to make my jigs and practice stuff.

I’ve yet to be able to find pvc and hose/ducting that fits together – I’ll go back and look into the flex duct and 4” pvc

At least I can reuse the 2.5” and build my spray booth with it LOL

Thanks for the advice everyone, much appreciated – although not what I wanted to hear lmao

-- They said I could be anything... So I became Sarcastic! They also said making drawers is easy... I think they lied :(

View jesinfla's profile

jesinfla

274 posts in 605 days


#5 posted 04-20-2015 12:27 AM

Updated my drawing from suggestions – I like this way better:

-- They said I could be anything... So I became Sarcastic! They also said making drawers is easy... I think they lied :(

View kdc68's profile

kdc68

2526 posts in 1744 days


#6 posted 04-20-2015 01:37 AM

Do you want some blast gates ?

I have a bunch (say 10) that will work for 2” PVC and 2-1/2” flex hose. The gate on one end is 2-1/2” O.D. and 1-15/16 O.D. on the other. As you can see in the photos below that these will fit a flex hose on one end (clamp needed) and on the other will fit a 2” PVC (with a duct tape wrapped around a couple of times). You could drive a self taping screw to secure that end.

If you want them all you have to do is pay postage…..Personal message me your info and we can work out the details. If you have pay pal, that would be an easy transaction…..
v

v

-- Measure "at least" twice and cut once

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kdc68

2526 posts in 1744 days


#7 posted 04-20-2015 11:58 AM

The pot got a little sweeter…..

I found 4 more blast gates (pictured above) for a total of 14

Also (pictured below) I have:
6- 2” wyes
3 – 2” 45’s
15 – 2-1/2” hose clamps

All this is yours if you pay shipping. I’m in a groove getting my shop cleared out of things I don’t need anymore. Storing and keeping everything good/bad/no longer wanted or needed been years in the making. It’s got to go, and I’d rather give it away than throw it out…..

Again, PM me to work out the details. Pay pal would work out great for reimbursement of shipping….

-- Measure "at least" twice and cut once

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kdc68

2526 posts in 1744 days


#8 posted 04-20-2015 01:52 PM

Your PM has been answered

-- Measure "at least" twice and cut once

View jesinfla's profile

jesinfla

274 posts in 605 days


#9 posted 04-20-2015 02:32 PM

Thx kdc68 – msg sent and thank you very much for your offer

-- They said I could be anything... So I became Sarcastic! They also said making drawers is easy... I think they lied :(

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kdc68

2526 posts in 1744 days


#10 posted 04-20-2015 02:48 PM

Your next PM answered….

-- Measure "at least" twice and cut once

View rwe2156's profile

rwe2156

2198 posts in 948 days


#11 posted 04-20-2015 03:01 PM



Updated my drawing from suggestions – I like this way better:

- jesinfla

This system will not work with a shop vac.
I’d hate to see you put the time and money into it.
Hope you haven’t bought the blast gates…..

Your best bet is individual machine hookups and move the vac around.
For the money you’re gonna spend get a Dust Deputy and canister.
Make sure you’ve got a good HEPA filter on your vac.

FYI your Y branches are aimed the wrong way they should go back toward the vac.
Good luck.

-- Everything is a prototype thats why its one of a kind!!

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kdc68

2526 posts in 1744 days


#12 posted 04-20-2015 03:06 PM

Your next PM answered….

-- Measure "at least" twice and cut once

View exelectrician's profile

exelectrician

2327 posts in 1894 days


#13 posted 04-20-2015 07:47 PM

Gather the “filtered air” and pipe it OUTSIDE – It is the fine stuff that does the most damage to your health.

-- Love thy neighbour as thyself

View jesinfla's profile

jesinfla

274 posts in 605 days


#14 posted 04-20-2015 07:54 PM



Gather the “filtered air” and pipe it OUTSIDE – It is the fine stuff that does the most damage to your health.

- exelectrician


Thanks – but not sure how I would do that :( making holes in my garage isn’t that appealing to me, I’m thinking about making a cyclone like container to add to my system.

The shop vac is 3.5 hp so it should suck stuff up pretty good, no?

-- They said I could be anything... So I became Sarcastic! They also said making drawers is easy... I think they lied :(

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kdc68

2526 posts in 1744 days


#15 posted 04-20-2015 08:04 PM

Sent you another PM with shipping info.

Thanks Jessie

-- Measure "at least" twice and cut once

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