By ian.kelly@basegroup.co.uk - 3/20/2019 11:02:28 PM
I'm doing a patch repair on a surfboard and want to set up a vacuum patch over the repair area only ie not a full bag over the whole board. I've looked at some sites on line and they recommend to only apply a partial vacuum so as not to damage the board. They show a setup where the vacuum pump is working against a controlled leak - tee piece in line and a small pipe clamp adjusted to get the vacuum needed - in my case 8 in hg. Trouble is my pump instructions say not to do this. Can anyone recommend the correct setup for this?
Thanks
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By oekmont - 3/21/2019 11:14:12 AM
At such an easy surface, and such small patches, vacuum won't bring you any measureable benefits. If you sand it down flat, it won't even be lighter. A void free laminate isn't hard to do in this case.
You could run a separate line to a vacuum gauge, and clamp the pump line at the desired pressure. This only works, if your setup is 100% tight.
Or you get an professional mechanical (quite expensive) or electronic (maybe more expensive than buying a new board) vacuum reducer/controller.
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