dust collection question
is their such a thing as too powerful of a dust collector? I had found a really good deal on a 10hp grizzly cyclone dust collector that is designed for industrial shops running multiple machines at a time all day long, if i was to put it in my small 1000 sqft 1 person shop would it cause any issues?
Technically, no. But think about the increased noise, upgraded duct work and electricity usage. It might not be the bargain it seems like. With that much suck you will definitely need heavier duct work so you don't collapse it. You may also want to keep all your blast gates open all the time. I would not hook 10 HP up to just a couple of machines. You may need to do some math to figure out how many cubic feet of air it is pulling and then balance it out.
alright, thanks for the help its like a 9k machine i would be getting for 1k. I was planning on running more heavy ductwork anyhow and it would be in a separate building connected to my main shop and it would be hooked up to more heavy machinery like a cabinet saw and jointer and what not, not jobsite tablesaws and what not but it would only be me, but it seemed like a good deal plus the filtration on it i think goes down all the way to like .2 microns with around 4k cfm if i was still high i know its generally bad to avoid 90s in duct work because of air resistance would it be a bad idea to put in 90s to numb it down some? sorry if its a dumb question pretty new to dust collection
It is rather large but you can choke it down without hurting anything.
If it is a cyclone I would assume it has a minimum amount of air flow to separate the dust from the air. That is only thing I can think of that would cause an issue.
Smaller duct work will restrict the air flow/cfm to levels you need. The load on the motor depends on the amount of air it is moving, so less air just means less load on the motor. Sort of like cutting 1/8" plywood on a 5hp saw. It doesn't hurt anything.
Probably overkill but since you can get it cheap and if you can deal with the duct work why not?
Is that 10 HP Dust Collector 240v Three Phase or Single Phase? If 3 Phase is you shop wired for 3 phase?
its the 3 phase and yeah it is wired for it
Have you considered how the makeup air will work? Are you drawing in unheated/conditioned air that will severely impact heating and coiling costs.
it will be pulling out conditioned air running through an extra filter and pumping it back into the shop
Makeup air is only a factor if it is exhausting outside. A dust collector totally contained within the shop simply filters the existing air.
I'm no expert here, but here is a very good source to research Dust Collection systems:
Bill Pentz Cyclone and Dust Collection Research home page and other pages on the website.
Bill Pentz FAQs
P.S. Clear Vue Cyclones have a "Pentz" version dust collector designed by Bill Pentz.
Disclaimer: I have no association with either.
that's interesting according to his cfm chart that 10hp dust collector would be a little over osha's standards but medical recommended it is about dead on and thats assuming you dont lose any cfm and that was only on my bigger tools not even on my router table and what not.
Is this the Pentz chart that you are referencing? "Exhaust Reqirements for Woodworking Operations - Recommended Duct Velocity 4000 FPM"? Scroll down to first chart.
If so the chart is in FPM (feet per minute) vs the 4000 CFM (cubic feet per minute) rating on the 10 HP Grizzly Dust Collector.
According to Bill the calculation is "FPM=CFM/Area". Where Area is the "size of the pipe".
Or examples Area of Circle: A = π r**2:
Grizzly 10 HP rated at 4029 CFM with a 6" diameter pipe, 3” radius or 0.25’
FPM = 4029 / (0.25 * 0.25 * Pi) = 20,519 FPM
Grizzly 10 HP rated at 4029 CFM with a 8" diameter pipe, 4” radius or 0.333’
FPM = 4029 / (0.333 * 0.333 * Pi) = 11,542 FPM
yeah the chart i was looking at said medical recommended cfm
Let me reiterate with the disclaimer that I'm no expert when it comes to dust collection systems.
That chart would indicate to me that the ~4000 CFM 10 HP 3 Ph Grizzly dust collector would have about 3 to 4 times the amount of CFM for those machines in that chart.
I think you can make it work but you probably have two to three times the size motor that you need for a 1 person shop depending upon the CFM requirements of the machines in your shop. You will need to correctly size the pipes (probably 8" for main dropping to 6" and then whatever size is required by the tool). You will probably need to leave several blast gates open to make sure you do not put unneccesary strain on the motor.
If you have a lot of machines paying for a properly designed pipe layout in your shop may save you money in the long run. I believe Nordfab offers that service.
Also make sure you keep small pets or objects away from any open blast gates ;-)
Best of luck and thank you for posting an interesting question.
Here is another good resource for duct work design. Some of the information on their site might help.
Nordfab Dicting: SIZING A QF® DUCT SYSTEM
Their products are top notch and straigtforward to install and as your requirements change relatively easy to reconfigure.
Disclaimer: I have no association with Nordfab.
I would love to get Nordfab ductwork. Beautiful, well executed, but OMG expensive. and honestly just can't justify for my needs.
Does anyone else know of another source for ductwork layout service ?
Two additional considerations - how does it compare in terms of space consumed and noise generated?
Shop space is at a premium and if the DC is over spec it will take up more than it needs. The opportunity cost of shop space is under-estimated.
If it is very noisy, you may regret the decision.
That having been said, it's very cheap...
yeah i already have a separate area that would fit it, it is outside but connected to the shop so it should help a lot with the noise and space plus might put in some noise reduction panels in their if its still crazy loud