Martin Payne on the charcoalgasifiers yahoo group has made a couple of valves for his Motofier. A small motorcycle run by a charcoal gasifier.  Martin has modified the valve I described in a previous post with some improvements. The disk is left flat but is made in a slight ellipse which helps to make a better seal in the pipe. He also used JB Weld to lock the disk to the cotter pin. On the plastic pipe he also added a small washer where the cotter pin is bent to lock it in place.  This is the end view of two valves.  Below is a PDF file from Martin which shows a way to make an ellipse for the disk. I have added another PDF of some ellipses made in Google Sketch Up. These ellipses are either 10% or 20% wider than the circle I started with. I have also added the Sketchup file. I know just about nothing about Sketchup and anyone else out there that knows Sketchup can do a better job of this. |
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