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I am in the process of updating the dust collection piping in my shop and need blast gates. I have some cheap plastic ones that get dust in them and also rattle. I probably need at least 6 of them.

The good aluminium ones are about $ 12-15 a piece and I think that I want to build my own.

I have looked at lots of videos, project, and blogs.

How many people have made their own and are you happy with them? Any issues with leakage or rattles.

What have you made them from as what I h ave found is a wide variety of materials and thickness. Many are not even finished and I would worry about swelling and warpage.

I am considering using half inch Baltic Birch and finish with poly…..Does this make sense?
 

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I built mine following Terry Hatfield's plans (they are shown in this link). I made the body out of 1/2" baltic birch, and the slides out of 1/4" plywood. I'm quite satisfied with them, and mine have been in service now for about 8 years. They aren't finished, and I suggest you not finish yours. These pieces are small enough that any wood movement is minor and of no functional consequence. I also suggest screwing the body halves together instead of glue. That way if you need to do some adjustment (tighten, loosen, whatever) it's very easy. Basically I bought a 6" union (coupler) and cut it in 1/2. That became the flanges. The holes in the body halves were cut large enough to allow the flanges to be inserted, and then screwed from the inside to the plywood. They also needed to be sealed on the outside around the edge with silicone. My gates were sliders (one direction to open, the other to close) instead of being completely removable…although the removable ones can be an advantage against a wall or something. Between the 2 halves of the body is a spacer made out of the same plywood (important, given the differences in thicknesses). If you want a little more room for easy sliding, put a piece of masking tape in there. If I were doing them over, I might look for a plastic material to make the slides, but the plywood has worked really well over the years.

Pipeline transport Engineering Gas Composite material Machine
 

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Do you use all of your blast gates? What is your time worth? Also what size blast gates are you using? Prices vary as high as 60 bucks!!!! LOL! But those are 6 inch.

I'm using 4 inch gates. That works for me. good luck!
 
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