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valve idea wanted for for a automatic top up on a small low pressure boiler Answered

Hi
Can anyone sugest a way for me to automacily top up a boiler as the level drops whilst generating low preasure steam.
I am building a small boiler steam generator for a sauna, my problem is that the boiler needs to be small and portable for backpacking and treking so therefore may only hold a couple of litres of water, the small tent style sauna will demand more than this. the boiler may be something simple like a kettle with a pipe attached to carry the steam into the sauna, but whilst taking a sauna i do not want to have to keep topping up the boiler, i have a constant heat source so no problems there. i also have a collapsable fold up plastic water carrier which i can suspend above the boiler as a reservoir but will need some sort of valve that allow the boiler to top up automaticlly. hope that all makes sense. thanks in anticipation.
robert

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Kiteman
Kiteman

9 years ago

If you're making it back-packable, you're making it light and simple.

To whit, don't bother with the automatic top-up. I would be tempted to simply use a funnel to pour water back down the steam tube.

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robertuk444
robertuk444

Reply 9 years ago

not a bad idea, the problem is i shall be in the sauna and not in eyesight of the boiler, i dont wat to have to keep getting out to check as my guess is that at a high heat it would run run dry in 5 mins or so and i would be in for 20mins, unless of course there was some way to bring the boiler inside the sauna with the heat source out side. it is likely that i will either use gas or a wood burning stove for the heat

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caitlinsdad
caitlinsdad

Reply 9 years ago

I suppose you can just run a thin hose/high heat tubing inside to tap off the reservoir to give you something like a water-level gauge. Rig up a toilet float valve to keep the the water level filled.

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robertuk444
robertuk444

Reply 9 years ago

hi
the toilet floats i have seen tend to plastic a a bit large but gauge is an idea though setting it up could be a bit tricky thank for your thoughts and i welcome anymore you have.
robert

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caitlinsdad
caitlinsdad

Reply 9 years ago

find the older type with the brass fittings and metal balloon float. You really just need a rubber float inside your vessel to push a rod up out of a hole to actuate the float lever which then actuates the flow of water into the vessel. Good luck.

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robertuk444
robertuk444

Reply 9 years ago

found plenty of small valves on the internet, but all plastic, metal one tend to be larger. might have to modify something.

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robertuk444
robertuk444

Reply 9 years ago

i will search internet to see if i can find anything small enough.