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Posted on Using PVC for Dust Collection Systems

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TechRedneck

770 posts in 3399 days


#1 posted 03-25-2012 11:11 PM

I use S&D 4” pipe. It is inexpensive and easy to handle. Get some good self cleaning blast gates, don’t get the cheap plastic ones.

I would measure the length of pipe you need, cut to length. Wrap the collett of the blast gate a few times with some good electrical tape. This helps make a good seal.

Set your bandsaw height a little over 4” and cut a series of 1” slits in the end of the pipe. Six or eight should do. Slide a good clamp over the pipe and fit over the blast gate. Works great. If you cut the slits too far just wrap one or two turns of tape to cover them then clamp.

I did not glue any fittings. Friction fit every joint and use the “U” shaped clamps to hold the pipe to the walls or

celing. When you have everything the way you like it, wrap each joint with some thick good quality aluminum tape.

If you have a DC with a clear bag. Test the system for leaks by closing all blast gates and turning on the DC. The collection bag should go a little limp. Listen at the joints and gates for major leaks. Some air will pass but not a lot. Don’ run too long like this but long enough to test.

Remember that some blast gates need to be installed a certain way. Check if there is a flow arrow. I made the mistake of installing them upside down and wondered why they were whistling.

Use short runs of flex hose to the machines. If you have to use reducers, reduce at the machine inlet.

-- Mike.... West Virginia. "Man is a tool using animal. Without tools he is nothing, with tools he is all.". T Carlyle


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