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Humidity problems

Started by trimguy, August 06, 2023, 02:39:01 PM

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trimguy

I have a planer that has a dust collection fan blowing outside my building. I'm going to upgrade the fan in the near future, while I am doing this is there something that I can do to prevent the hot, humid air from causing condensation on my pipe and on my machine? Would a flap on the end of the pipe be worth the trouble? There is about four or 5 feet of exposed pipe outside.


 

 

 

Don P

can you pitch the pipe out the other way.

doc henderson

yes, slope to the outside going downhill.  is this just in the winter?  why are you getting cooling of the exhaust enough to cause this problem?
Timber king 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor powered by a 12 volt tarp motor

trimguy

The pipe angles up to the ceiling 
 ( about 8' 4" ) then runs a crossed the ceiling to the blower and then elbows and goes out the wall. I can't really change the pipe unless I run it straight up then elbow over. The pipe on the outside angles down. I haven't been using it lately, so it's not the exhaust air. It's a conditioned space inside.

doc henderson

so warm humid air from outside, coming in the pipe and the cooler space in your shop condensing water on the inside of the pipe and running downhill?
Timber king 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor powered by a 12 volt tarp motor

doc henderson

Timber king 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor powered by a 12 volt tarp motor

customsawyer

Try sitting a trouble light inside the machine.
Two LT70s, Nyle L200 kiln, 4 head Pinheiro planer, 30" double surface Cantek planer, Lucas dedicated slabber, Slabmizer, and enough rolling stock and chainsaws to keep it all running.
www.thecustomsawyer.com

tule peak timber

Looks like a Northfield. I like the tilt down pipe idea..
persistence personified - never let up , never let down

kelLOGg

Slide a cover over the table? Won't keep condensate off the knives if that is a problem too. 
Cook's MP-32, 20HP, 20' (modified w/ power feed, up/down, loader/turner)
DH kiln, CatClaw setter and sharpener, tandem trailer, log arch, tractor, thumb tacks

Don P

I like some kind of flap outside to keep hot humid air from backing into the cool pipe,  or a tiny fan exhausting your indoor air out of that pipe all the time to keep the outside from entering the pipe. Damp in the dust pipe ain't good.

trimguy

 

 

 
Here are pictures of the ductwork inside and outside. I guess I will try to find a flap  to go on the end of it to see if that will help. Tile peak, it is a Powermatic 221. Thank you for your help, I will let you know if a flap works. Also, I'm still open to suggestions.

Old Greenhorn

Arnold, that's not good and must be really annoying. First, as you say, add a closure, like a gate valve at the outside end on the duct run, maybe add a second one over the machine. In order for that process to happen, you need to have air moving in and out freely, then condensing with the temp change. Stopping the free air flow should cut the problem considerably. Lastly, I would shove a drip pan under that duct on the machine. It won't prevent corrosion issues on the blades, but it will save the table and that cleanup.
You could add a drip leg on that down sloping pipe to the machine to catch the condensate, but I think preventing it's entry in the first place is a better way to go.
Tom Lindtveit, Woodsman Forest Products
Oscar 328 Band Mill, Husky 350, 450, 562, & 372 (Clone), Mule 3010, and too many hand tools. :) Retired and trying to make a living to stay that way. NYLT Certified.
OK, maybe I'm the woodcutter now.
I work with wood, There is a rumor I might be a woodworker.

Andries

I think Tom's advice is on the right track. 
Stopping the free flow of air in and out of the pipe when the planer isn't in use will stop the condensation from forming.
A blast gate near the wall should stop any air from moving. They are made for dust collection ductwork, so it won't cause any blockages the way that a flapper may do.
Remembering to open that blast gate will have to become a habit before turning on the planer, but it should save your planer from rusting up. 
LT40G25
Ford 545D loader
Stihl chainsaws

K-Guy

I think the blast gate is probably the best answer but have the gate wired to the on switch for the planer so it opens on startup. You can't forget what happens automatically.
Nyle Service Dept.
A common mistake people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.
- D. Adams

trimguy

Yes a blast gate. I don't know why I didn't think of that, I have them on 
my drops for the other dust collection and that would probably be easier to come up with. Thank you.

Old Greenhorn

Well, that's why we beat things around here at (our equivalent of) the local pub after work. ;D
Tom Lindtveit, Woodsman Forest Products
Oscar 328 Band Mill, Husky 350, 450, 562, & 372 (Clone), Mule 3010, and too many hand tools. :) Retired and trying to make a living to stay that way. NYLT Certified.
OK, maybe I'm the woodcutter now.
I work with wood, There is a rumor I might be a woodworker.

doc henderson

are you getting moisture in the turbo separator trash can?  you could also run the planer on the inside dust collector but have to empty more often.  
Timber king 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor powered by a 12 volt tarp motor

trimguy

Not that I noticed. The planer pipe is the only one that goes outside. The trash can is in line for the other dust collection for other tools that don't produce the volume of chips that the planer does.

trimguy

My blast gate came in Friday, and installed it yesterday around lunchtime. It seems to have taken care of my issue, but I will keep an eye on it for a while. A while back, I was having problems with the finished product out of my planner with the advice I was given in another thread I had gotten it pretty close to right, still was not real happy with it. Today was a good day to stay out of the heat and clean up and wax the planer and with the covers off I understood the adjustments I needed to make better now I am happy with it.

 

 
Thank you.

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