Thread: Ducting

Keith,

I've clamped my risers to the columns in my shed and have no vibration problems. Of course those that know me will tell you that's because nothing's hooked up!

Joking aside, if you use flex to connect the DC to the ducting and the ducting to the machinery, vibration should be negligable.

If you have a problem in one or two spots, it wouldn't be too hard to get some high density foam strip, and bung that under the mounting points, but I wouldn't be in a hurry to do that!

When you've finished, how'd you like a trip east to finish mine off?

P

Keith, like Midge I have my upright going along the upright for the shed, I used steel strap from Bunnings, the one with the holes in it can't remember what it is called. My ducting is 4" but the straps hold the pipe very securely.

I have shown my setup here, if you want a closer picture of how I attached the pipe with straps, sing out.

I also used rubber lined mounting brackets on the pipes, that works very well, and a flexible connection between the dusty and the pipe.

Thanks for the reply. If you haven't had a vibration problem on steel columns, I should be OK attaching it to brickwork. I never realised I would run into so many problems with ducting using PVC and
even the flexi hose. The different diameters, PVC to poly, to steel, to hose! It's certainly been an exercise in DeBono thinking.With a bit of luck I may have it up and running early next week.
The trip East sounds good, but I reckon I now need to get back and do some actual woodwork.

K

I just used a standard stormwater saddle, mounted on a timber block.

Cheers,

P

Keith Welcome to the forum.

I have got metal ductwork attached to my metal workshop, as you can see by the pics,
When I installed the ducting I placed strips of rubber between the ductwork and the brackets and I don't have any real problems with noise and vibrations.

BM, when are you going to finish getting all ducting hooked up?? surely there shouldn't be that much more to finish it off.

Thanks Al,
From what you and the others have said I will be putting rubber inserts between the wall and PVC piping.If there is any vibration it will prevent any abrasion.

regards,
Keith

Originally Posted by Al B

BM, when are you going to finish getting all ducting hooked up?? surely there shouldn't be that much more to finish it off.

So little to do, so much time!

P

Originally Posted by bitingmidge

So little to do, so much time!

P

Ahhhh I know exactly what you mean, BM.

Call me dumb, but if your ductwork is connected at both ends via flexible hose, (to eliminate any xfer of mechanical vibration from the machinery) then surely any vibration in the duct is a sign that there's something wrong with the ductwork? There shouldn't be any vibration... so putting rubbers in to "reduce" vibrations is just fixing the symptom, not the problem.

Maybe the bends are too tight or you have two junctions too close together, thus creating excess turbulence or some similar problem. In generating noise/vibration it'd be losing efficiency... so surely it's better to rework the runs and get them right?

Or you just have lots of stuff going through them!

I know what you are saying skew, but even airconditioning cab ducts get a harmonic vibration just from the friction from the air going through.

It may be unlikely, or even improbable, but it's not impossible.

Hang on, I said that in my first post!

Joking aside, if you use flex to connect the DC to the ducting and the ducting to the machinery, vibration should be negligable.

Cheers,

P