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Old 08-03-2010, 11:16 AM
Rollin Karg Rollin Karg is offline
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Moly cooling

A friend sent me a schematic of a European built Moly furnace. At that time we were changing a pot and doing some upgrades on one of our furnaces. I noticed that the cooling tubes on the schematic seemed to be metal and quite a lot larger than what we do here. It made for a nice uncluttered look.

It made me start thinking about this area and I decided to build a plenum with some 2" flexible tailpipe attached to it. This would allow us to aim the air flow at the element tops. I gathered up some parts and formulated a plan.Then I had to leave town.

When I got back my plans had been modified and my guys had come with a new and I think better approach. We installed one of these a few months ago and it seems to be working well. We did the second one last week and that's what these photos are about. Still a work in progress but I like how it's going.
The blower is from Grainger and costs I think $112. It puts out 463 CFM. If you stand at the edge of the furnace and look at the elements you can feel a nice little breeze on your face.
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Old 08-03-2010, 11:33 AM
Steve Stadelman Steve Stadelman is offline
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That is a really nice way to do that Rollin.
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Old 08-03-2010, 12:14 PM
Rollin Karg Rollin Karg is offline
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Thanks boss !!
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Old 08-03-2010, 12:48 PM
Larry Cazes Larry Cazes is offline
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Nice manifold, Rollin. Very clean design.
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Old 08-03-2010, 02:10 PM
Charles Friedman Charles Friedman is offline
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Paint it all gray. It will help it disappear.
That seams like a bit too large of a blower.
But, if it works? it works.
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Old 08-03-2010, 02:48 PM
Rollin Karg Rollin Karg is offline
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Quote:
Originally Posted by Charles Friedman View Post
That seams like a bit too large of a blower.
Yeah ,probably. I just took a guess at the size to start and at $112 I can't see I would saving much to downsize. I do think some reflective paint would be a good idea.
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Old 08-03-2010, 05:35 PM
Kenny Pieper Kenny Pieper is offline
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Rollin I am curious. Have you found that Steve's way with the two washers welded to a tube that blows the air just on the top shaft of the element to be inadequate?
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Old 08-03-2010, 06:15 PM
Rollin Karg Rollin Karg is offline
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Eben, the way it's setup, all the air is directed at the top of the elements and I can't see it having much impact on the overall temp of the furnace. The European unit had the airflow coming down from the top and I think that might have a small impact.

Kenny, I'm getting more air where I want it and I don't have hoses to deal with, so this what I like about it. The other way works, but I think this is a little better. We're using four furnaces right now and that's a lot of hoses. Plus with this system the top of the element is a little less cluttered. I don't see this an earth shaking improvment, but I think it's a little better.
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Old 08-03-2010, 10:16 PM
Scott Garrelts
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looks like it should be a lot easier to change out a broken element. :crossing fingers:

plastic hoses melt, sheet metal usually doesnt.

i like it
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Old 08-04-2010, 12:00 AM
Steve Stadelman Steve Stadelman is offline
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I think that this is a really good way to do this, i started using hoses because I got it out of the kanthal super handbook. There are lots of ways to skin a cat and keeping the transition from the strap to the heater is what is important.
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Old 08-04-2010, 06:17 AM
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Pete VanderLaan Pete VanderLaan is offline
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It does look good. I would again stress that cooling the leads at your transformer is a place where you can prevent a lot of serious damage. I have a blower running there whenever I go to High Fire.
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Old 08-04-2010, 06:22 PM
Paul Hayworth Paul Hayworth is offline
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steel flex piping for cold air

http://www.gsl.cz/en/products/pot-furnaces.html
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