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best way to plug & seal holes in dust collector ring?

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Forum topic by JesseTutt posted 249 days ago 522 views 1 time favorited 7 replies Add to Favorites Watch
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JesseTutt

792 posts in 694 days


249 days ago

Topic tags/keywords: dust collector modify dust collector seal leak

I am continuing the project of revamping my harbor freight dust collector. I have designed a new mounting system for the dc ring. I need to decide how to plug and seal the various holes that used to have bolts in them. There are three sets of two threaded holes for the old mounting method, and one set of two holes where the plastic handle used to be mounted.

I have considered using silicone and the bolts, using silicone alone, or trying to use the foil tape used by HVAC people.

This area would be under pressure (inside to outside).

What would you advise?

-- Jesse, Saint Louis, Missouri


7 replies so far

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johnstoneb

602 posts in 756 days


#1 posted 249 days ago

Put the bolts back in the holes.

-- Bruce, Boise, ID

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Grandpa

3031 posts in 1258 days


#2 posted 249 days ago

+1 on putting the bolts back. Use carriage head bolts to make it smoother on the inside maybe.

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JesseTutt

792 posts in 694 days


#3 posted 249 days ago

A couple of the bolts did not completely seal, what are the ramifications of putting silicone caulk on the threads prior to reinstalling the bolts?

-- Jesse, Saint Louis, Missouri

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Grandpa

3031 posts in 1258 days


#4 posted 249 days ago

On the threads….no problem now or later. Apply liberally and wipe off the excess after it is tight. I believe Clear Vue recommends DAP AFlex caulk to seal things. Either should be good. Allow to dry before turning on the collector.

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JesseTutt

792 posts in 694 days


#5 posted 248 days ago

Thanks.

I am surprised no one thought that the foil tape HVAC people use to seal ducts was a good idea. Is there a reason?

-- Jesse, Saint Louis, Missouri

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Grandpa

3031 posts in 1258 days


#6 posted 248 days ago

I use it at times but it is not solid like a bolt and nut with caulk sealant….at least to me.

you only got 2 opinions though

View gtbuzz's profile

gtbuzz

334 posts in 1024 days


#7 posted 248 days ago

I’ve done something similar with a different DC. You’re on the right track, just bolts and some silicone caulk to seal it up. If you ever need to remove it, admittedly, it’s a pain, but hopefully you won’t need to do that. Since this is in the ring and after the impeller (positive pressure), if you have leaks here, it’ll be pretty obvious. There will be dust escaping around the head of the fastener. If it were forward of the impeller (negative), there would just be reduced performance.

That silver HVAC tape would probably work, but the reason I didn’t go with it is because I had to go over a fastener head. Since it’s not a smooth profile, you’ll get a little wrinkle in the tape, which could be a leak if its big enough.

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