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[Neil]

Hi all,
I am searching for a design for simpling valves.
I would be most grateful for any leads.
They were the "Norm" in the Steam days, especially the Triple Compound engines. That part doesn't matter, 2 or 3 pots, as long as I can start it from the shore.
My best.
Neil.

[papymouzot]

Hi all,
I am searching for a design for simpling valves.
I would be most grateful for any leads.
They were the "Norm" in the Steam days, especially the Triple Compound engines. That part doesn't matter, 2 or 3 pots, as long as I can start it from the shore.
My best.
Neil.

I see no responses here, although I am interested too !!! 

[boneash]

Hi,
My memory of a simpling valve was purely a plug valve situated between the high pressure steam line and the LP cylinder inlet.
A puff of HP steam was given to the LP cylinder to kick the engine into life.
Depending on your pressure and temperature a simple ball valve operated by a servo should work if you want remote starts.
Hope that helps

[gondolier88]

What is described above is an impulse valve- not a simpling valve- and at model sizes may not be the answer- whereas a true simpling valve would be. A simpling valve creates an equal pressure in the LP valve chest, rather than an impulse of steam which raises the pressure enough to move the piston, allowing the HP piston to work as intended.

For models there is next to no benefit by compounding- I would supply both cylinders with HP steam and have a twin simple- the difference in cylinder size wouldn't matter at our engine sizes, and if it did bother you you can always sleeve the cylinder down to match the HP.

Greg