Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 83 users online :: 3 registered, 0 hidden and 80 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

CO2 tank threads

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.
Sponsored 
  • Author
    Message

CO2 tank threads

Unread postAuthor: noname » Mon Sep 10, 2007 9:24 am

I've heard lots of people say that unscrewing the needle valve from a paintball Co2 tank is extremely hard or near impossible. Not true! All you need is a vice to hold the bottle and a pipe wrench to uncrew the valve. The bottle can be attached to normal steel or brass or whatever kind of pipe fittings you want, simply by using 3/8" NPT fittings.
A 9oz CO2 bottle would be a gret hybrid chamber, just put in a schrader valve spark plug (or an actual one if you have the tap), a propane meter and air source, a 3/8" union, and you're done. The bottle will never fail, because they can easily hold 3000 psi. An emty 9oz tank should be less than $10, cheaper than a Sch 40 steel chamber.
  • 0

User avatar
noname
Lieutenant General
Lieutenant General
 
Posts: 2699
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA
Country: United States (us)
Reputation: 9

Unread postAuthor: psycix » Mon Sep 10, 2007 9:29 am

well ehm... cool :P
  • 0

User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: CannonCreator » Mon Sep 10, 2007 6:00 pm

Wow! this is actually a good thing to know. Thanks for posting this!
  • 0

Spudding Is dangerous, I learned the hard way:
http://www.spudfiles.com/forums/my-eye- ... 15301.html

Guns. As They may Claim lives, they are lives. Our lives.

When Life gives you lemons, through them at somone.

Live, Breathe, Eat, Paintball
User avatar
CannonCreator
Captain
Captain
 
Posts: 314
Joined: Sun Aug 12, 2007 12:59 pm
Location: Moorpark, CA
Reputation: 0

Unread postAuthor: Scope » Mon Sep 10, 2007 7:08 pm

20oz co2 tanks are rated for 1800 psi i believe. burst disks are 1.4 k?
  • 0

User avatar
Scope
Captain
Captain
 
Posts: 342
Joined: Fri Nov 17, 2006 10:31 pm
Location: Ct
Reputation: 0

Unread postAuthor: iPaintball » Mon Sep 10, 2007 7:17 pm

Noname, don't make the same mistake I did. After you remove the needle valve, the actual bottle threads apper to be standard 3/8", but they are not. A 3/8" male fitting will screw in about one turn, but after that, it won't go in any farther.
  • 0

Summer Projects:
CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
User avatar
iPaintball
Colonel
Colonel
 
Posts: 695
Joined: Sun Mar 04, 2007 8:37 pm
Reputation: 0

Unread postAuthor: noname » Mon Sep 10, 2007 9:18 pm

I was capable of screwing in a 3/8" nipple as far as it would go, or screw the needle valve all the way into a 3/8" female fitting.
  • 0

User avatar
noname
Lieutenant General
Lieutenant General
 
Posts: 2699
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA
Country: United States (us)
Reputation: 9

Unread postAuthor: frankrede » Mon Sep 10, 2007 9:23 pm

iPaintball wrote:Noname, don't make the same mistake I did. After you remove the needle valve, the actual bottle threads apper to be standard 3/8", but they are not. A 3/8" male fitting will screw in about one turn, but after that, it won't go in any farther.
no...I have done it and it works, but I use a 3/8" tap for even better threads.
  • 0

Current project: Afghanistan deployment
User avatar
frankrede
Lieutenant General
Lieutenant General
 
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Orpackrat » Mon Sep 10, 2007 9:35 pm

Scope wrote:20oz co2 tanks are rated for 1800 psi i believe. burst disks are 1.4 k?


Burst disks are 3,000psi.
  • 0

K.I.S.S. "Keep It Simple ******"

Orpackrat
1st Lieutenant
1st Lieutenant
 
Posts: 254
Joined: Mon Mar 19, 2007 4:11 pm
Location: Oregon Coast
Reputation: 0

Unread postAuthor: beebs111 » Tue Sep 11, 2007 9:01 pm

i was under the impression that burst disks were 1.5-1.6k but meh. what do i know?
  • 0

in the upcoming presidential election, there will be several candidates who will be running, one of whom is Hillary Clinton. Now WAIT A SECOND!!! I though there was some sort of rule that prevented someone from serving more than two terms in office. Vote Against Hillary: Presidential Elections 08
User avatar
beebs111
Brigadier General
Brigadier General
 
Posts: 807
Joined: Thu Aug 25, 2005 3:08 pm
Location: massachussets
Reputation: 0

Unread postAuthor: )DEMON( » Wed Sep 12, 2007 10:01 am

There are different strength burst disks I believe. When it says k for a value it usually means 1000x that number.
  • 0

Forever dreaming...
User avatar
)DEMON(
Major General
Major General
 
Posts: 1391
Joined: Sun Mar 12, 2006 1:22 pm
Location: Johannesburg South Africa
Reputation: 0

Unread postAuthor: dongfang » Thu Sep 13, 2007 3:49 pm

Hi,

I was capable of screwing in a 3/8" nipple as far as it would go, or screw the needle valve all the way into a 3/8" female fitting


Not that I know anything about it, but couldn´t it have been the case that one of you successfully screwed in a cylindrical 3/8 fitting, and the other one of you could not get in a tapered 3/8 fitting?

Regards
Soren
  • 0

User avatar
dongfang
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 448
Joined: Sun Aug 27, 2006 8:02 am
Location: Switzerland
Reputation: 0

Unread postAuthor: iPaintball » Thu Sep 13, 2007 5:14 pm

That might act ually be the reason, but I can't find any non NPT thredded nipples...
  • 0

Summer Projects:
CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
User avatar
iPaintball
Colonel
Colonel
 
Posts: 695
Joined: Sun Mar 04, 2007 8:37 pm
Reputation: 0

Unread postAuthor: Hubb » Thu Sep 13, 2007 5:21 pm

dongfang wrote:Hi,

I was capable of screwing in a 3/8" nipple as far as it would go, or screw the needle valve all the way into a 3/8" female fitting


Not that I know anything about it, but couldn´t it have been the case that one of you successfully screwed in a cylindrical 3/8 fitting, and the other one of you could not get in a tapered 3/8 fitting?

Regards
Soren


Or maybe the threads got cross threaded.
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Unread postAuthor: Gun Freak » Tue Aug 02, 2011 6:09 pm

I know this is an old thread, but I was going to start one just like it.

I want to take the pin valve out of a co2 tank, and then attach it to a slide valve/QEV gun for semi auto. I have a 3/8" tap (harbor freight junk) so will that work on the inside of the tank so I can use npt?
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: Lockednloaded » Tue Aug 02, 2011 6:52 pm

I believe you'd need a 3/8" flare adapter to NPT, I've heard those fit perfectly
  • 0

I love lamp
User avatar
Lockednloaded
Major General
Major General
 
Posts: 1558
Joined: Thu Sep 03, 2009 9:38 pm
Location: Texas, USA
Reputation: 0

Next

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot]

Reputation System ©'