That is what I was saying, maybe in a convoluted way. The check valve was a technique that actually would allow higher temperature and pressure to exist outside of the main boiler region.
-----Original Message----- From: Joshua Cude <[email protected]> To: vortex-l <[email protected]> Sent: Wed, Dec 7, 2011 6:12 pm Subject: Re: [Vo]:Discussion of "saturated steam locomotive" versus "superheated" from Railroad Age Gazette On Wed, Dec 7, 2011 at 4:38 PM, David Roberson <[email protected]> wrote: The pressure must be established within the boiler so I guess the hotter steam does not make its way back to the boiler. Is it likely that some form of check valve is used at the throttle? If that were possible, then higher pressure could be applied to the cylinders due to the super heater. It's not necessary to use higher pressure to superheat steam. In fact, the point is that the temperature of the steam is above the boiling point at the local pressure. Otherwise, it's saturated.
