Thread: Recommendation for 3HP dusty?

I have a 1hp dusty sitting on top of a home made cyclone (2 x 44 gallon drums, top drum has funnel and is cyclone, bottom drum is collector) I vent the air that has been through the cyclone directly outside the shed with no filter bag so no loss of suction and it works very well. but I am not pulling air through such a long tube and have few elbows. there is a lot more suck with the filters removed.



Doug

Thanks Doug. I am finding this to be a demanding quest, getting dust collection right, at least for the sub-micron dust concerns. So far I've established that an impeller of about 14 to 15" diameter powered by 3HP seems to be the minimum requirement for that. But there is very little true performance data out there for good design decisions. Most of my concerns and queries are now in the thread "External DC - finding the best of bad options?", where, all due to the help of fellow forumites, there is some good progress.

Have you had a look at the Felder, 4hp 3 kw. Only problem is a wiring upgrade

Anodyne, is that what you've got? I had a serious look at the model below that, the Felder AF22 which is 2.2kW. 3 phase is no prob for me, nor is total current draw. But the prices start to edge up, as does the size of the thing. I've shifted my attention to the idea of an outdoor cyclone extractor, to save some shed space, possibly keep prices down, and besides that since it all has to vent outside, I'm thinking I might as well put the whole thing outside.

A suggestion that might work ( I haven't tried it though). Could you attach a 1 hp portable dusty directly onto the machine to push the the flow toward the dusty outside? Like a booster. I would have thought it should solve the problem. Something like this:

http://www.carbatec.com.au/carba-tec...-compact_c1400

It's an interesting idea. There's a nice illustration of the effect of putting two fans in series in the free download link below. Basically, if you put two similar fans one after another in a duct, then the pressure will double, while flow stays the same.

So maybe fans in series, like putting a Carbatec DC impeller unit into the duct near the woodwork machinery, then the actual dust extractor (an impeller plus bins and filters) outside could be a solution if you have a long duct line that would normally kill your pressure through resistance. Could it be a way to use more 4" ducting too? What would be the down side of this idea? I wonder if anyone has tried it.


M.J. McPherson, Fans. In "Subsurface Ventilation Engineering", Mine Ventilation Services, Inc., see pp.26-27.
Fans by McPherson

This is the one I have and very happy with it. I have tall pleated filters, not the small ones shown.

Originally Posted by TP1

A suggestion that might work ( I haven't tried it though). Could you attach a 1 hp portable dusty directly onto the machine to push the the flow toward the dusty outside? Like a booster. I would have thought it should solve the problem. Something like this: ]

Pushing air means pressurising ducting and blowers. PVC Ducting can be permanently sealed with something like PVC glue but there's little that can be done with a cheap blowers. Unless some care is taken they will leak fine dust out into the shed. If this extra ducting and the blower are outside the shed then it should be OK part from the extra noise. I have found little difference between the noise made by cheap small and larger blower/motors