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Old 12-06-2017, 11:37 AM
chris Harman chris Harman is offline
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Blower questions...

Hi all,

I have looked through search but nothing seems to come up for what I'm looking for... and the amount of information here is staggering.

Anyway I have 2 glory holes, both are pre-Katrina WetDog, one at 12" and one burner head; and one at 18" with 2 burner heads. All the burner heads look like Joppa 650s; they are painted black; but they are at least comparable to the Joppa 650 on the Big Dragon that just got the the shop. Both holes are running Eclipse mixers with manual butterfly valves right before where the blower would attach.

Using the Big Dragon blower as a starting point, it's a Dayton 1TDR6 from Grainger... Im thinking that could be the right size blower to use for the 12" hole since then interior of the furnace is comparable for the interior of the 12" hole. Now I'm kind of at a loss of how to go about finding a blower for the 18" hole since it's so much bigger than the 12".

Ovens are a bit simpler and a bit easier to figure out so any help here is greatly appreciated.

I'm still really new at the tech aspect of it all.

Thanks again,

Chris
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Old 12-06-2017, 02:40 PM
John Riepma John Riepma is online now
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Chris, I have a couple of surplus Ametek Rotron regen blowers that I used to run 2 glory holes on simultaneously, one 18" and one 12" hole. With plenty of air left over. One has an inverter duty motor and I have an AC drive available for that as well. Both are 1 HP 120/240v. I believe that both of these are rated at up to 27" wc, which is more than enough pressure to run anything. They are loud, as is anything that generates the volume that you will need at any pressure. I had mine mounted outside and piped the pressurized air into the building. I'm sure that others will chime in with their experiences but that's what worked for me, and they're both for sale.

Pete, I know that the sale aspect of this should be in Classifieds but my response is also about what I used in a similar situation. If the combination is inappropriate in this thread, please remove it.
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Old 12-06-2017, 02:46 PM
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Pete VanderLaan Pete VanderLaan is offline
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Nothing inappropriate here.

I think that in general, the greatest grief comes from underpowering the air in general. Better to have real overkill. You can always bleed off the excess air and you can put a gate valve in to control the volume you do need. The trouble with really oversizing the blower is two fold: first is cost and second is noise. Putting the blower outside works well especially if you're trying to scare away critters and neighbors. It keeps attorneys employed too. At the least, building an insulated box for the things works well but the intake is what's making all the noise and those AMTEK units know how to really howl.
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Old 12-06-2017, 03:20 PM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is offline
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I had a friend that was an electrical engineer, that said for a blower to haul air it used more energy than throttling it- in other words it wasn't a good idea to bleed it, it was better to choke it- was he correct?
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Old 12-06-2017, 05:00 PM
chris Harman chris Harman is offline
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That's much bigger than I was thinking, the Amatek. I like having everything on separate blowers simply from a redundancy standpoint. I have never liked the massive blower with a manifold system, could be because I've never seen one work well... ever. Usually it was underpowered blowers in too small of a noise reduction box and/or a badly built delivery system.

It's a small space, so I was thinking smaller cage blowers would be all right for the noise. There's always going to be some noise.

I'm trying to keep them as self contained units. That way if something goes wrong with a separate blower then I'm not completely down for the duration while getting it fixed.

Last edited by chris Harman; 12-06-2017 at 05:05 PM.
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Old 12-06-2017, 05:27 PM
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Pete VanderLaan Pete VanderLaan is offline
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I would advise staying away from cage blowers. They may indeed be quieter but they simply can't develop water column that you really need. They never overcome piping resistance. Put your hand over the output, the motor never slows down. I think that the TD one you mention used to be the 4C006 from Graingers and its claim to fame was developing .25 WC and that indeed was enough to power a single burner from Dudley .
Those work, until you open the door up and then it goes to hell, particularly if you have a fiber glory hole which I continue to refuse to build since they do not retain mass heat. In a prolonged heat, you'll hate it.
And that's why I like the bigger beast. Theoretically you could have two input gas lines, one on a solenoid powered by a foot switch and excess air the same way. If you need the big burner, step on the switch. You can do reduction doing that as well.
If so, competing with John, I have two big graingers impeller blowers that do 10" WC. I don't care if I sell them or not so I have zip for any urgency. They too are loud, they just don't howl. I hate howling.
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Old 12-06-2017, 06:05 PM
Eben Horton Eben Horton is online now
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Call me captain obvious here, but on your large hole, you can gang 2 of the blowers that you are using on the small hole in series and will increase water columboressure to what you need. Simple solution.
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Old 12-06-2017, 07:57 PM
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Pete VanderLaan Pete VanderLaan is offline
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I don't see it as obvious. Squirrel cages can't produce pressure.
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Old 12-06-2017, 09:52 PM
chris Harman chris Harman is offline
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The blowers would be directly mounted to the hole, so 18-24" from the blower to the burner. It would lose that much power in that short of a distance?

...and no fiber holes, I hate them as well.
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Old 12-07-2017, 07:45 AM
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Pete VanderLaan Pete VanderLaan is offline
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If you have any 90's in the piping, they reduce your effective pressure by 50% each time. They are less expensive but not nearly as much as they used to be. In a straight shot, you're using a lot of sideways space and you should have some mixing of the air gas. Charlie Correll got me a german blower that cost $600 dollars for the recuperator. That seemed like an awful lot of money for a really noisy tool. It's the intake, it just sucks.
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Last edited by Pete VanderLaan; 12-07-2017 at 08:40 AM. Reason: spelling, it's always spelling..
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