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Dusty Deputy Passing Most Debris to the Shop Vac

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Forum topic by KE4NYV posted 10-29-2014 07:37 PM 1728 views 0 times favorited 29 replies Add to Favorites Watch
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KE4NYV

135 posts in 921 days


10-29-2014 07:37 PM

I have the small Dust Deputy and for a while it was working great. I have it set up with my Kobalt shop vac and a metal trash can with a fitted MDF top. For a while, this worked fine. Recently, I noticed that about half of what I suck up is getting passed to the shop vac. I have no idea what has changed. I noticed that most of the debris seems to just spin around and around, without moving down. I’m pretty sure as it spins and stays towards the top, it’s gradually getting sucked up through the top.

I was considering buying the larger Dust Deputy for my Grizzly dust collector, but now I’m not sure I want to spend the money.

Has anyone else seen this?

-- Jason R.


29 replies so far

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ChrisK

1809 posts in 2541 days


#1 posted 10-29-2014 07:45 PM

Sounds like the velocity of the air in the cone has increased. Is there any leaks allowing more air to get in?

-- Chris K

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waho6o9

7166 posts in 2036 days


#2 posted 10-29-2014 07:45 PM

I had a similar situation and couldn’t figure it out but I was thinking

there’s a gap some where around the top of the DD lid so I made

a plywood top to keep it from flexing. The bolts were long enough

and 1/2 plywood was used. Worked better after that.

View KE4NYV's profile

KE4NYV

135 posts in 921 days


#3 posted 10-29-2014 08:00 PM

My original setup with the DD was with a Lowe’s bucket and the snap-on lid. It seemed to work ok, but I filled it up fast. In that case, I didn’t even bother to seal the DD with the lid. I just used bolts all the way around with washers. When I went to the metal trash can, I couldn’t use the stock lid because it’s domed and has a handle in the middle. Instead I cut a disk from MDF and rabbeted the edge all the way around to fit in the top of the can tight. It’s tight enough that I have to pry it off. Also, when I put the DD on, I cut a felt pad to go between the mounting flange and the MDF top to ensure it was air tight. Not sure where my leak could be.

-- Jason R.

View Fred Hargis's profile

Fred Hargis

3926 posts in 1953 days


#4 posted 10-29-2014 08:35 PM

Are the seams on the trash can sealed?

-- Our village hasn't lost it's idiot, he was elected to congress.

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KE4NYV

135 posts in 921 days


#5 posted 10-30-2014 02:06 AM



Are the seams on the trash can sealed?

The best can tell. It was brand new and the seams are all fold over/hook style and then pressed together.

-- Jason R.

View Paul's profile

Paul

721 posts in 1025 days


#6 posted 10-30-2014 02:29 AM

How do you see the dust spin around a metal trash can and a mdf lid?

I’ve had a super dust deputy on my HF DC for over a year and haven’t had to empty the HF DC’s bag once.

Paul

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firefighterontheside

13439 posts in 1316 days


#7 posted 10-30-2014 02:31 AM

Yeah I’m thinking air is coming in thru the trash can somewhere causing air to go up.

-- Bill M. "People change, walnut doesn't" by Gene.

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Fred Hargis

3926 posts in 1953 days


#8 posted 10-30-2014 11:16 AM

Those seams need to be taped (foil tape, not duct tape)....they are seldom air tight from the factory. That includes the one around the bottom. You can test this without taping it. Put a plastic trash bag liner in it, being sure to put some weight in the bottom to keep it from being sucked into the ducting. Try it out and see what happens. That trash bag need to extend over the lip of the can, and be sealed by the top.

-- Our village hasn't lost it's idiot, he was elected to congress.

View KE4NYV's profile

KE4NYV

135 posts in 921 days


#9 posted 10-30-2014 02:56 PM



How do you see the dust spin around a metal trash can and a mdf lid?

I ve had a super dust deputy on my HF DC for over a year and haven t had to empty the HF DC s bag once.

I see it spinning around in the top of the DD, not the trash can.

-- Jason R.

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KE4NYV

135 posts in 921 days


#10 posted 10-30-2014 06:43 PM


Yeah I m thinking air is coming in thru the trash can somewhere causing air to go up.

What has me confused is why it worked when I first put it together. Now, in a matter of a couple of days it’s doing this.

-- Jason R.

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KE4NYV

135 posts in 921 days


#11 posted 10-30-2014 06:45 PM


Those seams need to be taped (foil tape, not duct tape)....they are seldom air tight from the factory. That includes the one around the bottom. You can test this without taping it. Put a plastic trash bag liner in it, being sure to put some weight in the bottom to keep it from being sucked into the ducting. Try it out and see what happens. That trash bag need to extend over the lip of the can, and be sealed by the top.

OK, I’ll go back and tape the seams. Maybe they are opening up slightly, where I can’t see and causing air to leak in. I can tell you that when I have it on, I can put my hand over the hose and the trash can flexes, trying to collapse on it’self. I know that is a drastic difference from open nozzle to complete blockage, but you would think that it wouldn’t be that noticeable with a small leak.

-- Jason R.

View Fred Hargis's profile

Fred Hargis

3926 posts in 1953 days


#12 posted 10-31-2014 12:18 PM

It only takes the tiniest of leaks to allow debris past the separator. It’s possible the can was relatively tight at first, and opened up a little with the stress the DC imposed.

-- Our village hasn't lost it's idiot, he was elected to congress.

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KE4NYV

135 posts in 921 days


#13 posted 10-31-2014 05:11 PM



It only takes the tiniest of leaks to allow debris past the separator. It s possible the can was relatively tight at first, and opened up a little with the stress the DC imposed.

Good point! I’m running to Lowe’s after work to pick up some foil tape. I think I can get foil tape in the HVAC section for duct work…but not duct tape :o)

-- Jason R.

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buildingmonkey

242 posts in 1007 days


#14 posted 11-01-2014 12:35 PM

I understand leaks. My cyclone was filling the filter with dust, and I found a gap between the blower and the cyclone. It had a gasket, but the top of the cyclone was light weight metal, and it just bowed apart and blew out. I took it apart, cleaned it up and put a big bead of silicone between the joint, and let it dry before using it again. Amazing difference. Now my drum is packed full, and hardly anything goes into the filter.

-- Jim from Kansas

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firefighterontheside

13439 posts in 1316 days


#15 posted 11-01-2014 01:01 PM

I’ve had similar problems where it worked great one day and then the next day my shop vac was full of debris.

-- Bill M. "People change, walnut doesn't" by Gene.

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