I'm not quite visualizing the non-conductive plastic washer on the group side. When I had a 2nd gen machine I cut a heat break gasket out of PTFE that fit between the group and boiler and added longer screws to make sure they still had a good grip.DanoM wrote:That is much easier to implement. Just a washer one size too small and filing/drilling out the hole to fit the dipper tube exactly, perhaps a non-conductive plastic washer on the group side to limit heat transfer with a small hole in it for ease of lever movement. Almost as temp stable as the saturated group too.
Regarding water saturation, I believe that happens when you raise the piston past the upper gasket so water enters above the lower gasket, doesn't it? In that case whatever method you use to close off the steam port would be equal to another. A truly water saturated group would be something you would find in a commercial lever with a thermosyphon, or am I missing something?