Re: cast radiator /headscratcher
First let me say I have never worked on a steam systems.
As I understand it steam systems usually have one pipe feeding the bottom of the radiator. The steam rises in the radiator and as it condenses it runs down and out the same pipe. There is an air bleeder and pressure release valve on the top side.
In a hot water system there is an inlet pipe at the bottom and a return pipe on the bottom of the other side. An air bleeder valve on the top side . The air is bleed out and the radiator fills with water. The hot water comes in the inlet side and rises to the top of the radiator as it cools the cooler water drops to the bottom and goes out the outlet pipe.
So the difference in the radiators- a steam radiator has a single pipe connection and a plug on the other side, a water radiator has a pipe connected to each side at the bottom and the bleeder valves are different but the cast radiators are the same.
I'm sure one of the techs will be along and correct me if I'm wrong.
Be sure you live your life, because you are a long time dead.-Scottish Proverb