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Spilling Oil Free Steam Engine

Posted by Jim Crank 
Spilling Oil Free Steam Engine
March 25, 2006 10:56AM
My Swiss client is all worked up about this Spilling steam engine, and the fact that it does not use cylinder oil.
He said this morning that it works and is in production; but with highly superheated steam they have long life problems.
Anyone know what the ring material is that they are using on the piston and valve?

Interesting web site: www.spilling.de
Re: Spilling Oil Free Steam Engine
March 25, 2006 11:25AM
Hello Jim,

It looks from the cross section shown on the site that it is a piston valve engine. The cylinder liners and rings are shown as a different material, plastic?

Anyway one could probably call them up and ask them.


Bill G.
Re: Spilling Oil Free Steam Engine
March 25, 2006 12:23PM
Hi Bill,
It is a piston valve, easily seen in the drawing, nice big ports too.
They will not tell. My client tried. They want you to take out a licence or buy an engine.
I asked him about innocently buying a set of spare rings.

Plastic?? At 750°f steam? Not likely. Perhaps a ceramic-graphite sintered ring, or some other graphite based composit.
Anyhow, I am going to find out, just to satisfy my curiosity.

Edited 1 time(s). Last edit at 03/25/2006 12:24PM by James D. Crank.
Re: Spilling Oil Free Steam Engine
March 25, 2006 12:49PM
Hi Jim that is a realy nice engine.
The piston rings donnot have to operate at the steam inlet temperature as it will average with the exaust temp. They might also have a small water cooling line injecting to the side wall of the piston. We can operate higher than 1200f and operate well. There is more than one type of material in the rings we are using and some are new and experimental high temp. stuff we are having formulated. Super high efficency is not necessary when burning garbage. I think we will see more of this, at least I hope so.
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