we have a steam boiler that is too big for the house, we replaced all air release valves and set them so that they would slowly let air out of the radiators. the coldest room is wide open. the temperature is pretty even, but since we changed the valves and set them, the pipe going the longest distance which was the coldest room is making all the racket. it use to make limited noise, not too annoying, now its ridiculous.im thinking we should reduce the nozzle size, anything elsewe should consider?
You have water in the steam line.Make sure all the traps are properly installed and working.
Steam Boiler? Gosh that must be 100 years old. Age of steam trains. Modern Gas boilers are known as Condensing Combi Boilers. UK price for a good make Vaillant Eco tec pro 24 Condensing Boiler is ?673.85 Inc vat 17.5% Plus flue ?58 inc Vat for a horizontal flue. (we ordered one last week) (about 1/3 less for a cheap and nasty make) then you have the labor and materials (copper pipes / any new radiators) ?20 - ?60 per radiator (rad) + Trv (add ?15 per rad) copper pipe between ?1.50 - ?3.50 per meter. Plastic pipe is cheaper. Labour aprox ?1000 for boiler change only Or around ?2000 - ?3000 for boiler change and new rads and new pipe runs too. If your builders dont know about boilers, how can they understand what needs doing? No wonder your writing about steam power! Miss informed I think. Unless you have steam power still in the USA? (you quote in $, hence my assumption of USA $) Sounds an expensive quote without seeing the job. Even in $. P.s Condensing boilers are new technology, Is the law in the UK that any new boiler must be Condensing unless the building is awarded an exemption ( Government idea for reducing emissions as Condensing boilers are between 5-20 % more efficient over normal Combi Boilers.).
Keep this room vent open and try turning down the others. This will allow this radiator more steam before it condenses to water. What your getting is water hammer because the steam is fighting the water that is flowing back to the boiler. By giving this room the steam first might reduce the water hammer. Don't worry about explosions as it is only water and steam and noisy. Did you replace the vents with the adjusting valves? That was a good choice if you did. Try adjusting them to see what works.
