On a Stuart 10V vertical steam engine, what holds the sliding valve against the cylinder block during operation? Closely machined tolerances between sliding valve, cylinder block, and valve rod? Or maybe shims between sliding valve and valve rod?
Or does the steam pressure in the valve chest force the sliding valve against the cylinder block?
Sorry, I am a total novice at this, so far! So please be very specific, and very gentle.......!
Lee Carkenord