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 68 users online :: 4 registered, 0 hidden and 64 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

Spring loaded ball valve vs Piston 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

Unread postAuthor: DYI » Tue Jan 29, 2008 8:04 pm

I've built a full piston valve, but it only had .787" porting due to materials difficulties, and it wasn't really worth posting. It also leaked intermittently.

My valve of choice on pneumatics has always been a burst disk of some sort, because reliability and power generally trump ease of use for me (unless you can't already tell :roll: )

If you could get a spring loaded ball valve to open fully in 2ms, it would be just as good as a piston valve. Until then, a piston valve wins.
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: SpudBlaster15 » Tue Jan 29, 2008 8:58 pm

DYI wrote:If you could get a spring loaded ball valve to open fully in 2ms, it would be just as good as a piston valve. Until then, a piston valve wins.


Upon reading this, I visualized a ball valve actuated by a high explosive powered steel ram.

...I think burst disks are a better option though.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Unread postAuthor: Mitchza89 » Tue Jan 29, 2008 9:11 pm

Mate never let any guns on this site ever make you feel lousy. My 1st pneu was a bit of pipe and a bottle threaded onto a ball valve. As your experience in spudding increases, as will your craving to build bigger and better guns. When I first started, I was scared to go past 100psi, now I'm heading towards 400psi because I'm confident with my building ability, in time, you will be too :D.
  • 0

Image
User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Unread postAuthor: Hotwired » Tue Jan 29, 2008 9:21 pm

Each to what they have :wink:

Exhaust piloted valves with full barrel flow are the best option for most people but pretty much any kind of valve that can be relied on to open quickly with significant flow is good enough.

I'm feeling like rebuilding my manual ballvalve cannon for plinking...
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: DYI » Tue Jan 29, 2008 9:28 pm

Upon reading this, I visualized a ball valve actuated by a high explosive powered steel ram.


:lol: That's what I was thinking while I was writing it, actually. Of course, when the ram mechanism to actuate the valve contains more potential energy than the chamber itself, you have to start wondering about your methods... :roll:
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: Mitchza89 » Tue Jan 29, 2008 9:30 pm

Well you'll be set if your using I dunno.....maybe 1000+ psi :D
  • 0

Image
User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Previous

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'