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Question on Ductwork9/18
Our collector (Oneida Cylcone) starts out with an 8" trunk, which runs the length of the shop. Above each machine there is a 5" wye, that reduces down to a 4" hose which then connects to each machine.
Our edgebander is on the opposite side of the shop, about 20" across from the 8" trunk. I like to run 5" pipe from the trunk over to the edgebander then drop down to the machine with the 4" hose. Is 5" pipe adequate, or should I be looking at 6". Ideally would like to use 5" as the wye is already in place for that...
FWIW the wye for the edgebander is at the start of the main trunk (end closet to the DC)
I would recommend a call to Oneida. They are very good at tech help for their equipment and their customers.
One thought I could not ignore is the use of 'hose'. A 12" piece of hose, with internal corrugations equals about 6' of smooth wall pipe if I recall correctly. Limiting the use of hose to only where it is absolutely needed increases the efficiency of any collection system.
What Dave said, you want to minimize any hose to as short as possible. If your running from the ceiling down to the machine with hose your losing a lot of efficiency!
Very generally speaking I would want to keep the piping as large as possible for as far as possible. If you have a 5" wye I would want to run that 5" right to the machine, and have less than a couple feet of hose at the end.
As Dave said though, a quick call to Oneida will save you from having to guess or trust some guy on an internet forum:>)
Thanks very much for the replies. I can run pipe almost all the way to the machine.
At the moment there's a run of 4" hose from the trunk to the machine (about 30'), and as expected the suction at the machine is lousy. Looking forward to improved air flow with hose eliminated.
If you run a 5" duct run 5" flex hose right up to the port and use a 5" to 4" reducer. Don't use 4" flex hose.
I should have mentioned that sharp turns and elbows are also velocity - strength - suckers. Long radius and gentle bends are desired since they will slow velocity less than sharp bends.
Installed 5" pipe (with long sweep elbows). Suction at the machine is considerably better, but actual chip collection is only marginally better.
Need to see why the ports are clogging up on the machine (Brandt KD 56)...