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Air Handling Systems is proud to support the following industrial trade shows. Upcoming Events | Before you say, I cant afford a dust collection system or fume collection system or I cant wait months for delivery, we can help you make it possible! You will need to buy from either a dust collection vendor or a HVAC vendor who carries heavier gauge ductwork. In the last five years or so, this seems to be improving, but is still not great. Privacy Policy |

frame with a ground screw, as shown in Figure 40. How Does Dust Collection Ductwork Work? Call us at (800) 367-3828 to discuss your next project or email your quote to sales@airhand.com.

In any case I am leaning heavily towards using PVC.

I use some metal ones on my PVC ducts as well because they are more durable than the cheap plastic ones.

I have done a lot of research on this recently, and I must warn you is is VERY IMPORTANT to ground your pipes and system. We have provided systems to television shows such as the New Yankee Workshop and This Old House and woodworking publishing companies such as Taunton Press, publishers of Fine Woodworking. In my research I found some web sites that may interest your readers.

You might also try getting an air flow meter and experimenting with some various size pipes to see what you find. As you state regarding PVC/ABS pipe dust collection which places extremely low pressure the negative pressure is way too low to collapse anything. The more info about dust collection I can get the better Blast gates are setup at each tool, and you only have it open when you are using that tool; all other gates remained closed. Also, the dust collector has three 4 ports. I bought a few extra remotes and I have them mounted near all of my primary tools.

All-metal ductwork is used in nearly every industrial and commercial application. Thanks Remove the old ones with a razor knife, then lube up the new ones with a little liquid dish soap.

G is for Gentle. This seem to make excellent sense when they explained PVC is meant to move water (a heavier substance) and dryer vent pipe is specifically designed to move air (a lighter substance). We also work with paper mills and corrugated box manufacturers.

Our phone lines are open from 9am-5pm central time, Monday through Friday. SWMBO first, soap eventually. PVC can not ground by itself, and the fact that it is a good insulator increases the static buildup much higher than metal. Without going on too long here, see the directions from Shop Fox above.

Not quite done yet but what a difference hen you get big pipes and a powerful blower.

Clean air has never been more important, and we're making sure our customers have everything they need.

Thanks again for sharing your thoughts on this.

Our dust collector ducting is designed to withstand high air pressure, minimize air resistance and reduce static pressure loss making it ideal for material handling applications.

These simple steps will drastically reduce your dust explosion risks. Paul-Woodworkers Guild of America.

Do not forget to connect the, wires to each other with wire nuts when two branches, Ensure that the entire system is grounded.

Either PVC or metal will work well. If you want to dive into more detail on this topic, some of the dust collection vendors offer guidelines and services in this area, and independent researchers such as Bill Pentz provide extensive information on this topic as well.

Producing round metal fittings has been our business for over sixty years.

Thanks The dust collector is the vacuum cleaner where the dust is filtered and clean air is returned to the building or extracted outside. In other words, you are better off if you have a single blast gate designated for each tool, and therefore each tool gets the full air flow from the dust collector.

If I were to get a portable system, I would do one of two things.

Are you installing spray booths, welding booths, or any other equipment that requires ducting for proper ventilation? On vertical runs, and some horizontal runs where connections are slightly loose, I put a couple #8 x 1/2 self tapping sheet metal screws into the joint to hold it securely. The HVAC piping in most home centers is 30 gauge or thinner, so it is not a good choice for dust collection. All those wood shavings swirling in a plastic funnel was a wicked combination.

Thanks, is aluminum flexible pipe a good alternative to steel. Non-metalic duct is prohibited by both OSHA and NFPA-664 due to potential static electricity issues. I think you will find that woodworking retailers are slowly getting up to speed on dust collection, but they are not on the cutting edge of research in this area.

If you already have PVC, at least run a bare copper wire along the outside of the duct to ground.

Do you have a remote? Thanks Paul-WWGOA. Dust collector ductwork is divided into two main categories, hard fixed ducting and flexible hose ducting.

Hi Noah. Good article.

This supports the use of PVC as safe.

I had that exact DC and ran 6 ducts that were much shorter than yours, and when I took the ducts apart to move I found that massive amounts of dust had settled in the ducts. check out grizley they have a very good dust pipe assortment TOP SHELF !!!!!!! Ummm, any suggestions on getting the flex into the coupling? I was also wondering how you configured the on/off system for your tools? If your system leaks, you are literally wasting money. Add screws wherever needed to secure joints. Problem is, the wiring is all done for the DC in a certain place in the shop.

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After much research about metal vs. occurs, you made this an easy decision for me. Good luck, and work safe.

In my shop that is a table saw, miter saw and planer, but that can vary depending on the actual tools that you own. Where do you recommend I down size to the 4 line? Keeping in mind that ideally you will place a 6 port as close to where the dust is being produced as possible, and I have never purchased a tool that had a standard 6 port, or even an optional one for that matter. Then insert your flex pipe into the other end of the coupler.

On the floor?, on the ceiling?, or same level as the intake port? That port allows massive air movement, and allows my dust collector to pull everything that is not attached to the tool.

If you go that route, Id suggest upgrading the filter to something in the 1 micron range.

Items out of stock and custom-made parts generally will be shipped in 5 working days.

Great article.

Woodworkers Guild of America Video Membership, It was interesting in learning a few more tips and tricks.

Hi, many thanks for the informative discussion. Help Ordering Online |

If you trunk it down to 4 right at the DC, then it wont gain you anything to open it back up to 6 for the main trunk, and youll probably see such low velocity that dust will settle in the line.

at Ys and Ts should be made with wire nuts.

Oil Extraction in the Gulf of Mexico needs fresh air supplied to explosion proof testing labs.

I totally agree with the comments on gentle curves and corners and have found that this minimises chances of clogging the duct on flexible systems.

It can be used with a 9 inch manifold with 4 4inch fittings or by removing the manifold and the connecting the DC directly to the main. Paul-WWGOA.

I would recommend a separate drop for each tool. very helpful! Example: A system where the main trunk line is 6" in diameter (representing 615 CFM) is connected to a machine that requires 395 CFM (4" diameter), you would add 615 + 395 = 1010 which would require a 7" duct.

Its not as quick as using the coupler, but it is not too bad. How about a shooting range that needs ventilation for gun smoke? They sell plastic hangers for the ABS pipe that is convenient to hang my pipe, instead of attaching the plumber straps.

If using metal, as I did, try using pop rivets instead of screws.

If that doesnt give you enough wiggle room you might need to either try different flex pipe that might have a different diameter.

Earthing?

Hi Timothy.

I am looking forward to the second installment about connecting various tools to the system as that is always a pain since tool mfgs cant seem to agree on a standard.

Continue to the second machine. I love it! Our clamp-together, modular ducting systems are ideal for the following industries and/or applications: Flanged ducting is a method in which two pieces of duct are joined using metal flanges. The max run is 57 horizontal plus 10 vertical. Therefore it is important to have your duct layout in mind when you buy your dust collector, and have your vendor suggest a model that can deliver enough suction at your tools.

Mine was not difficult to get in there.

Be careful out there.

These are easily removed when rearranging ducts.

The less bends and vertical climb the better, so Id leave it at the same level as the intake if you can. Maybe remote.

Only one tool at the time will work on this collector. Once it is started hopefully it will slide the rest of the way in without a problem.

Heres an option: https://www.homedepot.com/p/7-in-to-6-in-Round-Reducer-R7X6/100117561. Our fabrication department is dedicated to producing quality products. SWMBO just returned from visiting relatives for a few weeks and giving up a little shop time this week should help me to maintain tranquility.

I also exhaust the cyclone outside so I dont have to deal with filters and breathing very small particles.

Our products are designed to meet industrial standards.

Copyright 2022 Air Handling Systems | All Rights Reserved | Site by: Dust Collection Frequently Asked Questions.

Hi Ted.

It's extremely difficult to move or reconfigure flanged ducting systems. I Just moved and starting to put together my shop in the basement. If the fit is a bit loose, you could use X-treme tape or duct tape to hold it solidly and seal it. grounding terminal in your electric service panel.

Where can I find all of yours. Even among standard promulgated by the same standards-developing organization, the definitions vary significantly.. Its fun.

Thanks

O is for Open.

New shop in new house, so I installed a Harbor Freight DC, Oneida Dust Deputy, 4 ABS for most of system, and a blast gate at each drop.

Just because you may not have had any issues in the past does not mean that you are capturing the dust safely. Thanks Ive gone through the design calcs, and it looks like it will work with 4 ducting, but after reading this article Im wondering if he should relocate the DC to reduce the lengths. All prices subject to change without notice. Place machines that require the largest CFM (cubic feet per minute) of airflow closest to the dust collector.

Watch the next newsletter for specifics on how I optimized dust collection at various tools in my shop. Are you a Chemical or Allied Product Manufacturer with processes that generate fumes?

Also do not discount air restrictions after the power.

However, plastic flex-hose and plastic duct, are an insulator, and dust particles moving against the, walls of the plastic duct create a static electrical build. Specific choices that help promote gentle dust paths include: Minimize the flex pipe. I incorated 12 v switch system to start the system automatically. However, according to the OSHA Combustible Dust ANPR (Advanced Notice of Proposed Rulemaking), No single, universally accepted definition of combustible dust is available. Shop By Brand, Machinery Repairs |

If using plastic, blast gates to direct air flow, the grounding wire must, be jumped (see Figure 41) around the blast gate without, We also recommend wrapping the outside of all plastic, ducts with bare copper wire to ground the outside of the, system against static electrical build up.

Using the ones you say NOT to use will allow the air system to operate more efficientl. up.

For the stroke sander you will probably want to build a shroud of some sort, and position it directly behind where the dust flies off on the left end as you face the machine. PVC duct systems are common in hobbyist woodworking shops but users are encouraged to perform their own due diligence to verify their insurance coverage.

A model available from my local supplier (Canberra, Australia) includes a large collector/filter bag combination with two 4 inlet ports.

Additional charges may apply. One option might be to attach a coupler, and then you would have multiple options to attach to that depending upon which tool you were using it on. I was just going to use 4 duct as that is what is pushed by all the woodworking vendors on their sites and catalogsnow you have me thinking about 6!!!

I use a remote control that was provided as an accessory from Clear Vue Cyclones.

The picture shows a shop made 6 port on a jointer, with a drill stuck in it to illustrate the massive size.

The Powermatic 73 is a 1.5 HP unit, which puts it right on the edge as to whether it will deliver enough air speed through 6 duct to prevent the accumulation of debris in the duct.

While I liked your piece overall I know from handling PVC daily that in generates enough static you shouldnt ignore the risk.

I would argue that many of the products that are sold in this category are not up to the task of removing. In most cases, flanged ducting is throw away. Im planning to use 6 ducts to the tools, and 4 for the vertical runs to keep the velocity up. all I can find is 6 inch pipe. Youll have to keep an eye on low spots in the line and disconnect after a month or so to see if you have dust settling in the line which can become a major problem over time. The branch would be sized at 5-3-4, with 5" being the largest reducing to 4" with a 3" branch going out the side at 30 degrees. It depends on the impeller size and several other variables, and Id suggest running your question by Powermatic, but my guess is that you would be ok running a short main trunk of 6, dropping down to 4 for the tools. We are shipping orders on time, with no delay in manufacturing.

I did find an article by Rod Cole, who works at MIT, and has extensive knowledge on the subject. Thanks. I have seen this topic debated in woodworking forums for nearly two decades, but I have not seen any compelling evidence to support the theoretical risk. First, unless you want to jockey a hose from tool to tool each time you make a cut (dont kid yourself; thats a pain), you will need to set up ductwork to draw dust from each tool in your shop to your centralized dust collector. Yes, that sounds better. I searched the internet and read books to do the best I could and I see I managed to get some things right.

Great article and timely for me as Im considering a dust collection system for my small workshop (one car garage stall) .

I am in the process of setting up a new workshop and will be looking at a PVC rigid pipe system this time. IMPORTANT SAFETY NOTE: All dust systems must be grounded to avoid a buildup of static electricity in the ductwork or filter. The existing 6" trunk line would be acceptable. Madeline is this the maximum duct size that i can use or should i still use 6 for the main runs and 4 for the branches. Your advice on tees and y pieces is wrong, the ones you say to pick are more turbulent and add more static to the system over the ones say to not pick.

now before starting to build thanks for the tips. I slip the PVC over the small end, and then the bell slips over the dust port on the tool.

I would relocate to shorten the lengths if possible.

This allows you to easily make changes or expand your present system in the future. I know the answer is basically on the length of the main and static pressure and design.

Continue on to the remaining machines using the example above until your main trunk is equal in dia.

Include the CFM requirements for each dust port.

Proper ductwork is all about providing a network that allows air to be pulled from each tool individually at ample velocity, and moving enough air volume to remove both the chips and the very fine dust produced. ft. shop, but do yourself a favor and dont skimp). To maximize your air flow, focus most of your design efforts around 6 pipe, sometimes 4 when you need to, but nothing smaller than that for stationary tools.

X-Treme Tape, Self fusing silicone rubber tape 20 ft. roll, $14.99 To protect against static electrical build up inside a nonconducting, duct, a bare copper wire should be placed, inside the duct along its length and grounded to the dust, collector. At the end of the 30 feet, it will have about 16 feet of 4 inch pvc to reach the tools.

Installs in less than 1/2 the time of standard flanged duct systems. I have found this to be a perfect fit on both 4 and 6 ducting, requiring only a pressure fit to stay on, with little noticeable air leak.

I disagree with your suggestion of using screws whenever possible to secure joints.

The big issue is whether I should go with a bigger DC to support plumbing drops for each machine or a smaller DC unit and drag a hose around to each machine. I would recommend at a minimum a 1.5 HP dust collector with a 1 micron filter and a short 4 hose that you would connect to each tool.

Buying local might provide savings due to the high shipping costs of large pipes.

On my third now and it works great. While I agree with most of your article, I strongly caution any use of PVC pipe in a wood dust collection system. Use a standard PVC coupler to slip easily over the opening on your shop made tool port.

Every major shipping carrier serves our Woodbridge, CT. We are knowledgeable about shipping rates and carriers to different parts of the country and world.

Great advice!

I got a great deal of information.

It would be better if it was on the inside, but this is not always practical. Now you want to make sure that you are doing everything you can to get the most out of it.

I would build a shroud, or buy one, and experiment with positioning it.

Also, choose a good quality flex pipe with smooth interior walls that was designed specifically for dust collection. I like these much better than commercially available quick disconnect systems, plus I have not seen commercially available quick disconnects for 6 ducting. However, if the machine can be isolated with a blast gate, you will not need to add the two air volumes. My concern is not with dust that is moving inside the duct, but with the static that is discharged when nearby events such as cleanup with an air hose, sweeping, or emptying dust bags creates a dust cloud. Moving air causes enormous amounts of static electricity.

First, I would like to review your research findings if they provide examples of explosions caused by non-grounded PVC ducting.

Do you recommend reducing the run to 4 to the miter saw box to increase air velocity?

Example: if your woodworking machine has a 3 port you can assume that it requires approximately 220 CFM

Ive reconfigured the design to have a dedicated straight 20 run to the table saw, and either a 14 continuation to the chop saw, or a third dedicated 31 run to it.

If you have trouble slipping the flex tube over the PVC just cut some slits into the PVC as you see shown in the 2nd picture in this article. We recommend inserting a, continuous bare copper ground wire (see Figure 40) inside, the entire duct system and attaching the wire to each.

Tahnks for writing the article, it was very good for me.

Some of the cheaper stuff I have used is extremely rigid, making it terrible to work with.

If you start dipping below 4000 FPM, you should reduce the size of pipe. They are side by side in my shop. I build a 4system and made my own gate, and im very happy with them.

Great success with both. Woodworking Hobby Shop metal dust pipe, fittings and hose.

If it is super tight I would cut a slit into the flex, cutting through a couple strands of the wire that wraps around it, and that should help you get it started. Thanks for reaching out with your questions. The left lane will be on 4 inch pvc duct for about 14 feet with about four 45 degrees elbows.

As to your question, you can probably guess what I would suggest which is a bigger DC and a ducting system. Manufacturer ratings for CFM are inconsistent, and if I know which machine you have Ill have better estimate of what kind of performance youll see through that configuration. For tools that are farther away, you might need to drop down to 4 to keep the air velocity up. You are probably better off going with 4.

What size hp would you recommend for that, my whole shop is 1822 so none of the runs can be super long, I was thinking of getting a 2hp from harbor freight to hold me over until I could afford a cyclone would that be a good idea?

Extra ports. Over 90% of stock orders can be shipped within 24 hours or less. Do not get schedule 40 or 80, because these are expensive and heavy, and all of the extra mass is wasted on dust collection which places extremely low pressure on PVC relative to plumbing applications which generally dictate schedule 40 or 80.

I currently have a 4 H.P. On the 4 it is a bit looser, so I have used duct tape to secure it. If I have three separate lines, Id need a 6-4 reducer going into each of the three ports on the collector.

Cool!

This electrical discharge may. Heres a link to sign up for our Premium Membership to access the full benefits of the site: https://www.wwgoa.com/?add-to-cart-multi=1&products=1195090&skipcart=1&coupon=c20716&vscid=c20716&skipcart=1336083/?nabc=0&SubscriberKeyHash={{SubKeyHash}}. My question should I take advantage and use the largest duct I can find for the main then branch off of it with smaller ones? Ive had a 2HP cyclone dust collector for years, its a collection of home improvement store galvanized pipe (probably a combination of 26-30 gauge, I never really check) and high quality smooth elbows and wyes purchased from a variety of mail order sources.

very good article.

The sharp point and threads of the screw inside the ductwork will tend to catch and hold onto small pieces of wood chips that can build up over time.

Quick disconnect with standard PVC coupler.

If you are going to run 6 then it wont be wise to use the 4 ports on the DC.

DC, with suction capacity of 3560 CFM and Static Pressure 16.8. Shipping Methods. I have emptied the barrel a couple of times and only have a trace amount of dust in the DC bag.

I live in the country and can exhaust my dust directly outside without the catch bag restriction.

We will be happy to provide a quote. Either buy one used from someone who has recently upgraded (there are lots of them out there in my area) or buy one that has enough power to collect from a ducting system if you decide to add that later.

This would be easily able to cause an explosion if the right amount of dust was floating in the air at the time. Hi Mike. If 6 is the way to go why then dont the stores sell fittings for this size.go figure!

The soap seems like a worthwhile trick to try. I have been using a central dust collector system for over 10 years, utilizing both PVC and HVAC ducting. What are the limitations of your workshop or space?

Thanks for this.

The unit has lots of capacity, a very high MERV rating for the filter and low noise rating (75 dbA at 10 ft.).

Also the store I work for stocks some 26 gauge duct work, 4 inch and 6 inch ys still have to be ordered in but if customers ordered enough of these they might become an in stock item.

Air Handling Systems supplies to a whole array of furniture and cabinetmakers, boat builders, mobile home manufacturers, sawmills and many other wood product manufacturers that are attendees of IWF (International Woodworking Fair) as well as members of the WMMA (Wood Machinery Manufacturers of America). End Matchers | Feeders/Conveyors | Finishing Equipment | The benefits are significant.

It would collect some of the heavier debris but would not do much to collect the fine dust that causes health problems.

Another option would be to make your own coupler out of plywood or MDF. You might get by with the HF unit, but it would be borderline. How to Install Nordfab Ducting, Step One: Layout the Machinery of Your Shop.

We have solved the dust collection system affordability problem. Youll probably have to use metal for your first transition.

Or should I stick with the 6 inch ducts? Smooth on the inside. The stroke sander is the worst tool for dust and not sure what is the best way to set up the collection piping on it.I currently am usuing a cheap dust bag with 4 ports and I run 1 port to each end of the stroke sander, its not working. Light, strong, versatile.

What are the blast gates used for? Although my shop is in the painting stage, I can assure you I will be implementing the ideas in this article. 10% leakage on a 50,000 CFM system will lose enough air to add five to six machines.

Would such a small system work, in your opinion? 2) if you do run your trunk line (main line) on the ceiling or in the middle should you include a slight angle on the run like you would a sewage drain? Came here looking for a good way to strap the pipe to ceiling/wall and found that plus more good info. Paul-Woodworkers Guild of America. Once again, many thanks for the informative discussion.

every thing that is in the article is great, I made my blast gates from wood and metal with no problems, I use a first primary collection container before my dust bag to catch larger items so they do not go through my dist collection fan and you do not have to empty the dust bag as often.

The shop/garage is 16x24.

Buy as big as you can and you will only have to buy once. To the extent possible, put your tools with the greatest CFM requirements closest to the dust collector. I just installed a dust collector with a 7 OD pipe, how do I hook it up to a plastic system?

Pharmaceutical manufacturers need special flexible hose for clean rooms. And if you were using a four inch line a low cost take off is the plastic end caps found in rolls of carpet at your builders supply. Note: It is likely that the CFM requirements of your machine will not match the chart exactly. You answered several questions I had about setting up a dust collection system in my shop.

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