I've been asked to make/procure a saftey valve for a Bowman model steam
engine. These look like a copy of the Mamod engine from the 50s(?) and has a
simple meths fired boiler running an oscillating engine.
Can anyone advise what sort of operating pressure these might have been
designed for and hence what pressure the safety valve ought to open at?
The boiler looks to be of quite light construction and no obvious
strengthening stays are visible.
One slight snag in trying to determine the pressure needed to run the engine
experimentally is that it in France in the hands of a non engineer and I'm
in the UK!
NB the original valve was lost and replaced with a bolt so I'm keen to make
the engine a bit safer.
Any help/info welcome.
16 years ago