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 71 users online :: 5 registered, 0 hidden and 66 guests


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

Registered users: Bing [Bot], Exabot [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

100% seal, no O-rings!

Come find a how-to on how to do something, or come write your own for other people.
Sponsored 
  • Author
    Message

Unread postAuthor: hunter1992 » Sat Apr 14, 2007 11:31 pm

lithium grease works great for lubing rubber. I used this design on my new cannon and it works GREAT! Thanks alot brain!
  • 0


hunter1992
Private
Private
 
Posts: 23
Joined: Wed Apr 04, 2007 11:00 pm
Reputation: 0

Unread postAuthor: pyromaniac » Thu Apr 19, 2007 6:26 pm

I am sorry to kick up this topic but does there need to be a equalization hole? i'm trying to make my first piston with this but i just don't see how you will get air to the chamber unless this is a chamber fill piston.

or I'm just stupid.

nvm i get it now.
  • 0

:pottytrain3:
User avatar
pyromaniac
Brigadier General
Brigadier General
 
Posts: 805
Joined: Tue Feb 27, 2007 7:18 pm
Location: MO
Reputation: 0

Unread postAuthor: origin unknown » Tue Oct 09, 2007 3:47 pm

Does the washer in the middle of the piston have 2 holes through it?
  • 0

Ecclesiastes 1:9 - What has been will be again, what has been done will be done again; there is nothing new under the sun.
User avatar
origin unknown
Colonel
Colonel
 
Posts: 533
Joined: Sat Apr 14, 2007 2:38 pm
Location: Searcy, Arkansas (college) and Memphis, TN (hometown)
Reputation: 0

Unread postAuthor: Brian the brain » Wed Oct 10, 2007 1:39 pm

The back phram allowes air to pass from the pilot into the chamber.If it doesn't it's not done correctly.
I'd like to see hunter's gun!
I never read his post til now...
  • 0

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Unread postAuthor: spanerman » Wed Oct 10, 2007 1:45 pm

this is exactly how a brittsh QEV works....its like a check valve and seals perfeclty
  • 0

Image

spanerman
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 438
Joined: Sun Sep 17, 2006 2:54 pm
Reputation: 0

Unread postAuthor: Brian the brain » Wed Oct 10, 2007 1:58 pm

The back phram allowes air to pass from the pilot into the chamber.If it doesn't it's not done correctly.
I'd like to see hunter's gun!
I never read his post til now...and yes, the middle washer is just for support.
The pham should be kept from turning inside out at pressure it should be supported on the other side by a metal washer like so
pressure----> )I
  • 0

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Unread postAuthor: dongfang » Thu Oct 11, 2007 6:35 am

Hi,

Add oonnnnnne little disk in the pilot end (like the exit disk, just at the opposite end of the tee, and a little smaller), and you have a DFTV valve. If you want to have one.

That disk should probably be the classic o-ring type, as it should pop into the open, and a tapered oversize disk would be difficult to stuff back into place after each shot.

Regards
Soren
  • 0

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

Sponsored

Sponsor
 


Unread postAuthor: schmanman » Thu Oct 11, 2007 6:45 am

wow, I've been gone for like amonth and a half, and this thread is still going!
  • 0

Persistence is a measure of faith in yourself
User avatar
schmanman
Major General
Major General
 
Posts: 1685
Joined: Sat Mar 25, 2006 12:28 pm
Location: Michigan,U.S.A
Country: United States (us)
Reputation: 0

Unread postAuthor: brogdenlaxmiddie » Sat Dec 29, 2007 2:58 pm

Does this clever design work as well, if not better than say other piston valves, specifically ones that use a solid piston?
  • 0


brogdenlaxmiddie
Colonel
Colonel
 
Posts: 562
Joined: Sun Jul 22, 2007 2:19 pm
Country: United States (us)
Reputation: 0

Previous

Return to How-To Guide Database

Who is online

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

Reputation System ©'