Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Thank you Nick for the research!

I agree on letting the leverage do the work but right now, I have the weight fully towards the valve itself.  Clearly too heavy.

What is surprising is that the Bing weights are all over the map.

It seems the spring loaded style is far simpler. My Märklin PV goes off at exactly 2atm on my Bing which I believe is proper per Märklin. So boiler size is not a factor...