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How Do you unscrew the valve of the top of co2 tanks

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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How Do you unscrew the valve of the top of co2 tanks

Unread postAuthor: Goats spudz » Thu Aug 04, 2011 12:30 pm

i have an old co2 tank for a beer system that my Grandad had, its about 30 years old, i emptied it through the hammer valve and drilled it through but something in the valve got stuck in the cylinder, how would i get it out because the thread is brass with a silver coloured ring around the bottom and i have tried with a wrench put i cant remove it. help :D
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Unread postAuthor: jsefcik » Thu Aug 04, 2011 12:38 pm

Put the bottle in a vise, and get a pipe wrench and just keep pushing,
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Unread postAuthor: Goats spudz » Thu Aug 04, 2011 12:58 pm

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Unread postAuthor: jsefcik » Thu Aug 04, 2011 2:17 pm

Heat it up

if my other posts pop up please excuse them, they arent showing up on my computer please excuse them
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Unread postAuthor: Goats spudz » Thu Aug 04, 2011 2:24 pm

i have opened it,,, jumped on it :D
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Unread postAuthor: jsefcik » Thu Aug 04, 2011 2:34 pm

How did you get it open?
did you heat it?
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Unread postAuthor: saefroch » Thu Aug 04, 2011 3:55 pm

Pressure test that before you use it, looks like it's taken a bit of abuse. Fill it with water and pressurize to twice the pressure you plan to use it at.
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Unread postAuthor: Gun Freak » Thu Aug 04, 2011 3:57 pm

What size fittings are you gonna use to attach it?
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Unread postAuthor: Goats spudz » Thu Aug 04, 2011 5:02 pm

its fine the only damage was the paint and label which i have sanded off. also it had 2600 psi of co2 in it, i de-pressurized it by pressing the valve in on a rock. And Im gonna put a 1/2" hex nipple that reduces to 1/4" for the elbow into my QEV. and im only pressurizing to 300 psi, also to answer your question i opened the valve with the wrench i kicked it really hard and the valve came off.
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Unread postAuthor: MrCrowley » Thu Aug 04, 2011 6:12 pm

Goats spudz wrote:also it had 2600 psi of co2 in it

How hot was the bottle? :shock:

CO2 is only ~800PSI at room temperature.
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Unread postAuthor: Goats spudz » Thu Aug 04, 2011 6:25 pm

i kept it in my shed which has insulation and a window in the roof its kinda hot in there, i pressure tested it but it cooled
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Unread postAuthor: Mr.Tallahassee » Thu Aug 04, 2011 6:28 pm

The CO2 would have to be upwards of 200 degrees Fahrenheit to be under that much pressure at rated fill.
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Unread postAuthor: Goats spudz » Thu Aug 04, 2011 6:38 pm

yah, the bottle was about 200 degree f
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