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 78 users online :: 4 registered, 0 hidden and 74 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

can you use a ball valve like a oiston valve

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

can you use a ball valve like a oiston valve

Unread postAuthor: superpenguin » Sun Mar 29, 2009 2:26 pm

American Valve®
1" Check Valve PVC SCH40 Solvent



could you just cut a small slit on the inside for an eqaulization hole and use a check valve as a piston valve?[/img]
  • 0

Last edited by superpenguin on Sun Mar 29, 2009 2:44 pm, edited 2 times in total.
User avatar
superpenguin
Private
Private
 
Posts: 10
Joined: Sun Mar 29, 2009 2:10 pm
Reputation: 0

Unread postAuthor: jonnyboy » Sun Mar 29, 2009 2:31 pm

I don't really get what you mean. :?

Maybe you should have a look at what pistons are.
  • 0

mobile chernobyl wrote:I can shoot a Canuter Valve off my '82 Chevy Ram F150 AT LEAST 3/4 Mile with 'ma cannon made of soup cans duct taped together, then I just squirt some bacardi 151 in the chamber and hold up my cigarrete lighta and WHOOSH! That thing flies at least 3/4 mile
User avatar
jonnyboy
Colonel
Colonel
 
Posts: 591
Joined: Mon May 26, 2008 1:20 pm
Location: Williamston MI USA
Reputation: 0

Unread postAuthor: Biopyro » Sun Mar 29, 2009 2:46 pm

No. Not unless the check valve was one which allowed flow from both branches of the tee into the stem, in which case it probably still wouldn't work unless the valve was already made like a piston valve.

I may have misunderstood you, but I think that it would have been done already if it was possible.

http://www.spudfiles.com/forums/piston- ... t8157.html Have a look at this link.
  • 0

Last edited by Biopyro on Sun Mar 29, 2009 2:47 pm, edited 1 time in total.
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. -Benjamin Franklin
User avatar
Biopyro
Colonel
Colonel
 
Posts: 656
Joined: Fri Aug 04, 2006 5:32 am
Location: UK
Reputation: 0

Unread postAuthor: superpenguin » Sun Mar 29, 2009 2:47 pm

i mean that a piston valve is basicaly a check valve with a rod instead of a sphere and if you could just cut a slit on the inside so it dosnt seal completly and would be your eqaulization hole.you would have to have the chamber atached to the valve like normaly and have small barrel touch where the valve seals.it would be like a coaxel gun.
  • 0

Last edited by superpenguin on Sun Mar 29, 2009 2:52 pm, edited 2 times in total.
User avatar
superpenguin
Private
Private
 
Posts: 10
Joined: Sun Mar 29, 2009 2:10 pm
Reputation: 0

Unread postAuthor: Biopyro » Sun Mar 29, 2009 2:50 pm

Not really, because a check valve has only two ports and a piston valve has three.
Definately check out that link I posted, it helped me loads back in the day.
  • 0

Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. -Benjamin Franklin
User avatar
Biopyro
Colonel
Colonel
 
Posts: 656
Joined: Fri Aug 04, 2006 5:32 am
Location: UK
Reputation: 0

Unread postAuthor: c11man » Sun Mar 29, 2009 3:57 pm

i think i under stand what you are trying to say super...

if the flap was perfectly perpendicular to the pipes it might work. 2 problems though...

1. the flap already inside of the check valve would probalby not be soft enought to form a seal on the barrel

2. from what i have seen the flap is at an angle like this

http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=checkvalve.jpg&t=1238360257835

EDIT: this would make more of a diaphram valve not a piston valve
  • 0

User avatar
c11man
Brigadier General
Brigadier General
 
Posts: 783
Joined: Fri Feb 06, 2009 4:37 pm
Location: Wisconsin, USA
Country: United States (us)
Reputation: 0

Unread postAuthor: superpenguin » Sun Mar 29, 2009 4:40 pm

you could cut the barel at an angle and it would probaly seal. but i was talking about a differnt type pf check valve, that is a swing arm check valve or somtjing like that. i am talking about the type that uses a ball to seal it.
  • 0

User avatar
superpenguin
Private
Private
 
Posts: 10
Joined: Sun Mar 29, 2009 2:10 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: c11man » Sun Mar 29, 2009 4:52 pm

a ball might be harder

first the barrel would have to be EXACLTY center in the barrel

second the end of the barrel would have to have a perfectly flat and almost polished surface.

third the barrel would have to be exactly in the right position forward or back so that it seeled on the barrel and in the original check valve
  • 0

User avatar
c11man
Brigadier General
Brigadier General
 
Posts: 783
Joined: Fri Feb 06, 2009 4:37 pm
Location: Wisconsin, USA
Country: United States (us)
Reputation: 0

Unread postAuthor: Daltonultra » Sun Mar 29, 2009 10:12 pm

Simple answer, NO. Most check valves would be completely unsuitable as a firing valve, and I don't think any of them would be practical to modify. They simply don't work in the right manner.

The few that COULD be modified to work would require extraordinarily exacting work to adapt, and would probably cost you more than simply buying a QEV or making a fully custom-made piston valve.
  • 0

The Official High-Tech Redneck

"There is no such thing as overkill." ~Solomon Short
User avatar
Daltonultra
1st Lieutenant
1st Lieutenant
 
Posts: 282
Joined: Mon Nov 24, 2008 8:17 pm
Location: Columbus, Ohio, U.S.A.
Reputation: 0

Return to Pneumatic Cannon Discussion

Who is online

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

cron
Reputation System ©'