Author Topic: Selection pf materials for semi rotary valves for steam  (Read 917 times)

Offline Bob

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Selection pf materials for semi rotary valves for steam
« on: June 01, 2020, 06:29:43 AM »
I am building Ray HasBrouck's No.3 Horizontal Mill Engine. I have a cast iron block and would like to hear from builders with experience of running semi-rotary steam engines on steam. In particular I would like to know about the selection of materials for the valves. If simply corrosion, friction and running together are considered then bronze vales working in cast iron seems a good choice but further in his book Ray mentioned the effect of heat  and expansion of materials in connection with running his engines on steam.

I am concerned about steam leakage with the semi-rotary valves. So far I have only found video of engines with semi-rotary valves running on air when leakage would not be apparent.

A similar situation must prevail in the popular MEM Corliss engine. Could anyone with experience of running these engines on steam comment on what valve material they selected?

Many thanks