don young piston valves

[John BaguleyParticipant @johnbaguley78655]

Yes, I did put some narrow grooves in them. I used a 60° threading tool.

John

[John RutzenParticipant @johnrutzen76569]

Thanks John, my fabrication is going ok but it will be a while before I make the valves.

[Simon CollierParticipant @simoncollier74340]

It’s vitally important that the Teflon rings be made according to the tried and true procedure. A friend who thought he knew better, had two failures before he followed the correct procedure the third time and, surprise surprise, he had success. The method is given here:

https://modeleng.proboards.com/thread/13000/piston-valves-rings

Another friend made them too big cold, and they seized on first steaming.

[Author]

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