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Modifying a fire extinguisher.

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Modifying a fire extinguisher.

Unread postAuthor: )DEMON( » Sat Jun 24, 2006 7:17 am

I just bought a 1kg fire extinguisher and have emptied it already,I want to find out if I can turn it into an air source. I am unsure of how it works, this kind is not a chemical reaction kind, it is just the substance with air pressureized above it.That is what I think. Here are some photos of what I have done. I don't know what to do form here and I need help.

Emptying these are fun. :D

Edit, sorry, they are mixed up.I don't know what happend.
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Attachments
fe1.jpg
This is empty, I have taken it apart befor so that explains why the pressure gauge is dented.All attachments to this are threaded and can be removed.
fe2.jpg
I am not sure what these are but I think they lead to the chamber, the one directly seen has a miny piston that only lets substances out.
fe3.jpg
This is the nozzle, I don't know how the valve works but it might be a chamber sealing piston type valve.
fe4.jpg
This is the pressure gauge, it is measured in kpa.
fe5.jpg
Sorry the pics are fuzzy, you can see the various bit once you have unscewed the peices.
fe5.jpg (15.23 KiB) Viewed 1042 times
fe7.jpg
This is the main part which can be removed with ease from the chamber.
fe7.jpg (12.94 KiB) Viewed 1042 times
fe8.jpg
This is the chamber with some of the powder remaining, it is sealed to the top peice with and o ring.
fe9.jpg
all the peices.
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Unread postAuthor: spudshot » Sat Jun 24, 2006 8:20 am

looks like a DC extinguisher, dump all that crap outta the tank (wear a mask just in case) and then just go from there, i took off the gauge on mine and put on a quick connect for my air compressor, if you're going to use it for an air source i'd tap the nozzle and put a hose on there with a quick connect for filling pneumatics.
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Unread postAuthor: )DEMON( » Sat Jun 24, 2006 10:39 am

It is tapped, everything is tapped and threaded.

So I must make sure that the fire extinguisher must be filled through the port where the pressure gauge was?
What about the other side?
I looked at the valve and it is really simple, I will keep it on there.I have also emptied all the crap out of there.
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Unread postAuthor: Mihlrad » Sat Jun 24, 2006 3:51 pm

The substance is dry chemical... basically dry chemical is a chalky powder, completely non toxic, it just makes you feel weird and maybe cough if you breathe it in but its not toxic.
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Unread postAuthor: )DEMON( » Sun Jun 25, 2006 1:30 am

Ok, today I am going to buy some stuff for it.
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Unread postAuthor: LucyInTheSky » Sun Jun 25, 2006 3:32 am

Thought you might want to see this. Its not mine. It is on
http://www.uksgc.co.uk/forums/index.php?showtopic=75

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Unread postAuthor: )DEMON( » Sun Jun 25, 2006 7:19 am

Thanks, I have it figured out now..
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Unread postAuthor: WOW!! » Sun Jun 25, 2006 9:09 am

Iall ready made one, it shoots pens, it has a shrader valve and a PSIG, what is the maz psi on a fire exstinugsher? Ill get a pic up soon.
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Unread postAuthor: pyrogeek » Thu Jul 20, 2006 11:00 am

Having the pressure gauge on it would be nice, so what I would do is just add a "T" in between the tank and the valve, and that would be where your air inlet goes.

I modified a fire extenguisher before, one of those old CO2 ones (very heavy) and I just used it for exhausting my combustion after firing it and such crap. I had a quick connect on the outlet where I would connect something for the air to go out, and then I would just connect the air compressor to it and open the valve to repressurize the tank. But, this is a little different than your situation.
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Unread postAuthor: )DEMON( » Thu Jul 20, 2006 11:03 am

The threads on this one are irregular so I can't just screw in a fitting. I will have to weld a fitting in.
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Unread postAuthor: SpudStuff » Thu Jul 20, 2006 11:20 am

just get the closest fitting. wrap it in teflon. thread it in then run a bead of solder around the rim
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Unread postAuthor: Benny » Thu Jul 20, 2006 7:13 pm

Do what spudstuff said, but instead of solder use some jb weld.
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Unread postAuthor: Pete Zaria » Thu Jul 20, 2006 7:38 pm

Agree w/ Benny. Take it to a hardware store and find whatever fitting goes in it the best, then give it two or three wraps of Teflon tape, thread it in with a wrench, and then JBweld it in (inside and out if possible). That sucker wont' come back out.

I might try this for use with a little cloud bbmg strafer.

Peace,
Pete Zaria.
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