Subscribe to download
Steam Boiler Pressure Controller by Bendigo

A micro controller to manage boiler fill level to maintain pressure without the boiler blowing up.

To use it, connect the nodes from the boiler to the controller, connect use a variable valve connected directly to the boiler then connect the valve with pipes to a tank with fresh water.
Set the default boiler fill level to 4% or lower, connect the variable valve to the controller and a toggle button to start the system. The toggle button can be independent or connected to the ignition of the firebox.
The water flow into the boiler will be adjusted automatically to keep it at a level that the pressure will not exceed 10.

Demo train loco to show how it works.
https://steamcommunity.com/sharedfiles/filedetails/?id=2879077333