Dust collector Help?

[4yanks]

Originally Posted by JimThomasson

I have the Woodtek 961-339 - 3HP, 240V motor; UVFR 1,180 cfm; four 20" x 36" bags; 6" inlet w/three 4" adapters
I am using 4" flex hose. Even though I have it hooked up to my tablesaw, jointer, radial-arm saw, drill press and lathe I use metal blast gates to close off what I'm not currently using.

Does anyone have suggestions on how I can improve this unit? I can't afford 6" metal ducting right now.

Any suggestions or sketches would be greatly appreciated.

Merry Christmas and God's blessings to one and all!

Jim

Jim,

The single most important thing that can be done to improve the efficiency of any DC system is to hook it upgrade the ducting. Assuming the ductwork is well sealed the next consideration is velocity within it. This can be improved by making the ducting straighter and/or using a slicker material. Metal ducting is generally the slickest surface, next I would assume to be PVC, last is probably flex duct. Whether you use metal or PVC limit the use of flex duct to the last couple of feet of your run so you can make a connection to your machine if you have to. Ductwork that travels in a straight line to the machine will yield the best results. However, for stationary systems this is rarely possible. So when you install the ducting try to run it as straight as possible, use 45 degree turns instead of 90's when you can. You can try calling a local HVAC contractor about buying metal duct. You can probably get away with 28 ga.. If that is still too much check out PVC drain pipe at a building supply store. There is some debate about the dangers of static electricity and PVC, but I don't think the average small woodshop will generate enough airflow to make it a significant consideration. Good luck.

[JimThomasson]

I'm working on a duct solution.

What about modifications / improvements to the bag setup. It has the stock two bag set up. In an upright arrangement like this, can I effectively set up a trashcan vortex for removing chips and larger particles before they reach the impeller? Should I replace the bags with canisters?

Lots of questions and alternatives.

Jim

[junquecol]

Originally Posted by digitect

Bruce, the blower and motor came off a fully functional Delta 50-179. I seem to recall the impeller measured nearly 12".

It certainly is quiet. The first time I turned it on I thought it was broken, you can actually have a reasonable conversation standing next to it.

Nice to meet another woodworker in Apex.

1999 Delta catalog list he 50-179 as 3/4 HP, with a 10" impeller. Strange thing is the 50-180 has 1.0 HP motor, but handles less static pressure.

[PurpleThumb]

You can use a chip can before the impeller and it is my understanding that the pleated filters of the canister are superior to bag filters.