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i'm making a boiler can i use a one way valve? Answered

so i'm trying to make a boiler system so that i can get a little bit of energy back from my forge the idea for the forge is to basically cut open a 55 gallon drum on the bottom flat side and put a forced air pipe in the small orifice normally used as an air hole when dumping the barrel. then i'd cut out the space needed to fit 4 inch stove piping where the larger 2 inch orifice is and carry the exhaust outside and out of mind. then i'd cut a hole in the bottom of the barrel so i can get my work in, put in a steel plate that was cannibalized and drill a few air holes in it, put refractory cement everywhere and bob's your uncle.

what i want to do however is to put some water pipe in the fire box and have it turn a turbine or something, i'll cross that particular bridge when i get to it. but the main question is how can i safely store a reservoir of water so that the pipes don't run out of water halfway through a burn cycle? the thought was that i'd invert another 55 gallon barrel and connect it to one end of the pipes with a one way valve. the only question is would the valve guard the second barrel from the pressure generated while still allowing the water to flow in when necessary? or would the barrel just load up with pressure and when i hit 20 psi it just explodes in a hot watery mess?

any knowledge about this would be great, stuff like where to get cheap but good pipe in upstate new york, where to get regulators, how to find the valve itself, or even where i can find safety fittings like pressure release valves and temperature control.



Best Answer 6 years ago

Boilers for steam engines and such are regulated and have to be designed to certain safety standards. They have to be tested periodically and kept in repair.

That's because they frequently explode if not maintained/designed etc.  When they explode you will be held responsible for the damage or injuries.

Insurance companies won't insure them unless they have full certification etc.

Maybe you have a good idea but you really have a lot of research to do before implementing it.

Re-design, I can't put into words how RIGHT you are!!! As a heating professional, I can still remember the movie of the hot water heater being propelled through the ROOF on a THREE, COUNT'EM THREE story house from the basement. Incredible power. This one of the most dangerous ideas I have come across in a long time. If the author is determined to do this, it is CRITICAL that a relief valve is used with sufficient discharge flow to allow true FAIL SAFE operation. Like the sign at the entrance of the Haunted Forest in the Wizard Of Oz said "I'd turn back if I were you". Unless you are a trained engineer, I would call this effort suicidal at best.

i understand the risk, it's why i haven't built it yet, i've done some looking online but all that i can find are massive boilers that are relics from the turn of the century, or new boilers that run on fossil fuels. i'm not afraid to use fossil fuels but they cost too much and i can get the same amount of work done with wood or if need be coal which is still pretty cheap comparatively.

Like any boiler, it will need to be checked periodically, not much different than steam heat boiler, must be filled, checked, all will depend on how mush steam you use. I want to run a turbine, need steam to get the rpm I need, have also thought and designed a scavenging system to collect, condense, and recirculate the steam. Even with that, a sight gauge and occasionally refilling will be needed, along with pressure gauge, back flow valve, pressure release valve, accumulator, I think that will do it. Also can easily tie it is with my hot water, two separate systems in one. I understand the steam makes a ton on noise.

tnt vs steam

are you wanting to create steam ???
or just hot water?

steam, my goal is a constant 80 PSI coming out of a 1/2 inch metal pipe orifice.

So after losing a long descriptive post this is simple, to do this i need a back flow valve, pressure relief valve, pressure gauge, shut off valve, accumulator, anything else? ' Also, what is the maximum pressure I should look for? Some say 40 psi, others 120 psi. I'm spinning a small turbine, already made the turbine and generator., collecting info on a steam boiler, please don't bother to discourage me if you have nothing constructive to add, lookin forward to some ideasl
'thans, John

what are you using for fuel waste oil ' wood' coal

i used an old gaz bottle ie ( Propagne - lpg ) to do this but it has to be tested to double the normal working pressure befor you commit ie 80 psi x 2 = 160 psi to be on the safe side

Thanks for your reply. So I understand that about the pressure minimums, have a few tanks that would suffice. Am I correct about the other components?, The valves, etc? I've been using a 55 gal. drum for a wood stove foe over 20 years, in the tree business so I have tons of wood, always had the idea of plumbing it into my hot water tank which is electric, in the meantime I work as a technician at a hydro electric plant so I started thinking of making steam to power a micro turbine I made. I would be easy to put a coil of copper tubine inside the drum and plumbb it, add the necessary relief valve, back flow, and gauge and try the whole think outside first, do the necessary pressure tests. All feedback is appreciated, Thanks again, John