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 76 users online :: 6 registered, 0 hidden and 70 guests


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

Registered users: Bing [Bot], farcticox1, Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Pneumatic Air pressure

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

Pneumatic Air pressure

Unread postAuthor: KingKyro » Sat Sep 25, 2010 11:50 am

I just built my first Pneumatic gun and i was wondering what are the warning signs if any that i need to be aware of so i don't put to much air pressure in my chamber.
  • 0


KingKyro
Private
Private
 
Posts: 15
Joined: Tue Jan 26, 2010 5:58 pm
Location: Pennsylvania
Reputation: 0

Unread postAuthor: urgle the danish cow » Sat Sep 25, 2010 11:52 am

if its pvc read the pipe to be extra safe and if you are using a ball valve read the valve for max psi
  • 0

User avatar
urgle the danish cow
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Sun Jul 26, 2009 4:48 pm
Reputation: 0

Unread postAuthor: Gun Freak » Sat Sep 25, 2010 11:58 am

We need to know what kind of materials it is made out of. PVC, if sch 40, is normally used at about 100 psi. Sch 80 is rated higher and can even be used in low mix hybrids. If it is metal, like galvanized pipe nipples, then it will be good at I'd say a max of 800 psi but I wouldn't push it higher. So and pictures and/or details of the gun would help us answer your question...
  • 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: KingKyro » Sat Sep 25, 2010 12:20 pm

here is a few picks of the chamber and valve assembly. i didn't include the barrel cause i made it interchangeable, all my PVC pipes are pressure rated.
My downfall is the end cap, coupling's and other attachments i had to buy didn't say if they where pressure rated or not.
  • 0

Attachments
PHOT0036.JPG
here is the full chamber valve assembly
PHOT0037.JPG
the chamber is made from a 1' long piece of 3" sch 40 pvc the is pressure rated to 260 psi
PHOT0039.JPG
here is my pressure gauge that reads up to 160 psi, tire fill valve and pressure release valve
PHOT0038.JPG
my modded 1 inch automatic inline sprinkler valve

KingKyro
Private
Private
 
Posts: 15
Joined: Tue Jan 26, 2010 5:58 pm
Location: Pennsylvania
Reputation: 0

Unread postAuthor: Gun Freak » Sat Sep 25, 2010 12:40 pm

With that way you drilled into a single layer or pvc three times, I would only trust this launcher up to 100 psi. Some people may suggest even lower :D How high have you been using it?
  • 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: clemsonguy1125 » Sat Sep 25, 2010 12:40 pm

The only problem I see is that you tapped the gauge into a single layer of pipe. If not for that I would say 80 PSI, but since you did personally I would rebuild it but at 30 you MAY be safe. Other than that nice, clean first pneumatic.
Edit-Gen Freak beat me to it but trust me, 100 PSI is not a good idea
  • 0

User avatar
clemsonguy1125
Major General
Major General
 
Posts: 1485
Joined: Tue Jul 21, 2009 4:00 pm
Location: East Coast
Reputation: 1

Unread postAuthor: Technician1002 » Sat Sep 25, 2010 1:07 pm

Very good performance can be had if you didn't use a small restrictive valve between the chamber and barrel. Best performance is had when the valve is at least as large as the barrel. A 1.5 inch valve will out perform a 1 inch valve by about double. A 2 inch valve is often cost prohibitive. Price skyrockets with larger sizes.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Sponsored

Sponsor
 


Unread postAuthor: Gun Freak » Sat Sep 25, 2010 1:12 pm

@Tech, AFAIK, 1.5" sprinkler valves are not all that common.
  • 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: Technician1002 » Sat Sep 25, 2010 2:36 pm

@ Gun Freak, I must be lucky. One store near hear even has 2 inch for about $80.
  • 0

Last edited by Technician1002 on Sat Sep 25, 2010 6:56 pm, edited 1 time in total.
User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: KingKyro » Sat Sep 25, 2010 2:45 pm

@ tech, i had to order the 1" valve off the internet cause i couldn't find them in any stores around me. i tried Lowes, home depot and a few others. as for the gauge i had wondered if re doing the chamber so the gauge goes through the end cap and inner PVC would be better but wasn't sure. so far Ive had it up-to 60psi using a bike pump, didn't hear no leaks or anything, all i noticed is how hard it got to pump at that point. if i make the chamber shorter when i re-build it will that affect the amount of pressure i can use?
  • 0


KingKyro
Private
Private
 
Posts: 15
Joined: Tue Jan 26, 2010 5:58 pm
Location: Pennsylvania
Reputation: 0

Unread postAuthor: saefroch » Sat Sep 25, 2010 6:31 pm

No, shortening the chamber will not affect the level of pressure the pipe can take. It will affect performance though.
  • 0

User avatar
saefroch
Major General
Major General
 
Posts: 1679
Joined: Mon Jun 08, 2009 8:47 am
Location: U.S.A.- See Map
Country: United States (us)
Reputation: 0

Unread postAuthor: Technician1002 » Sat Sep 25, 2010 7:03 pm

KingKyro wrote:@ tech, i had to order the 1" valve off the internet cause i couldn't find them in any stores around me. i tried Lowes, home depot and a few others.


This is strange. My local Home Depot has them in the Irrigation isle. Their online website lists several models that are in your local store and not for online purchase.

Model 57101 and 57100 on the page below indicates this. Don't look in the plumbing section. Check the irrigation isle for the yard and garden.
http://www.homedepot.com/webapp/wcs/stores/servlet/Search?keyword=sprinkler+valve&langId=-1&storeId=10051&catalogId=10053

Image
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: KingKyro » Sat Sep 25, 2010 7:44 pm

This is what confused me tech, i can easily find the valve on the company websites but they didn't have them for in store sale. I even had manager's looking for me in the isle's as well as on there computer's.they all came back the same online purchase only. maybe its a Pennsylvania thing i don't know.
  • 0


KingKyro
Private
Private
 
Posts: 15
Joined: Tue Jan 26, 2010 5:58 pm
Location: Pennsylvania
Reputation: 0

Unread postAuthor: maverik94 » Sat Sep 25, 2010 9:48 pm

This is strange. My local Home Depot has them in the Irrigation isle. Their online website lists several models that are in your local store and not for online purchase.

My local Home depot doesn't carry sprinkler valves either. I just order mine from Amazon.com :)
  • 0

"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
User avatar
maverik94
Colonel
Colonel
 
Posts: 558
Joined: Wed Jan 21, 2009 4:48 pm
Reputation: 0

Unread postAuthor: Technician1002 » Sat Sep 25, 2010 11:49 pm

I wonder if they don't carry them in locations that are always wet and humid and don't use irrigation.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Next

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], farcticox1, Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'