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 64 users online :: 6 registered, 0 hidden and 58 guests


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

Registered users: Bing [Bot], farcticox1, Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

can you run C02 straight into Qev ??

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: jackssmirkingrevenge » Wed Feb 24, 2010 3:14 pm

D_Hall wrote:Or did I miss a sexual inuendo?


Very thinly veiled ;)

Brian the brain wrote:The power scared me.I did not feel comfortable around it.


:shock:

You are human after all!

:D :D :D
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: Patto » Wed Feb 24, 2010 4:13 pm

Sweet as :) Thank you
  • 0

User avatar
Patto
Sergeant
Sergeant
 
Posts: 96
Joined: Wed Jan 20, 2010 7:08 pm
Reputation: 0

Unread postAuthor: Brian the brain » Wed Feb 24, 2010 4:24 pm

You are human after all!


Living tissue over a metal endo-skeleton...

Just feel like keeping my teeth for a bit longer... :D

Patto..do be careful..the power behind it is incredible.I had to knock the hammervalve open with an actual hammer.
And I had to hit it hard too!

If anything fails it will be very dangerous.
  • 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: Patto » Wed Feb 24, 2010 7:23 pm

Brian the brain wrote:
Patto..do be careful..the power behind it is incredible.I had to knock the hammervalve open with an actual hammer.
And I had to hit it hard too!

If anything fails it will be very dangerous.


So would it be a better idea to run the co2 through a reg down to say 400psi and use it that way?? That would still be plenty of power for what I need :D :D . Would the hammer operate alright at that pressure?

Also since it will be reged down would (sorry if this sounds dumb but we don’t get to do a lot with co2) that help it to last a little longer or is that just me being a optimists? :lol:
  • 0

User avatar
Patto
Sergeant
Sergeant
 
Posts: 96
Joined: Wed Jan 20, 2010 7:08 pm
Reputation: 0

Unread postAuthor: metalmeltr » Wed Feb 24, 2010 7:54 pm

Since the gas would be used in the same volume at a lower pressure there would be less gas being used so the number of shots that you could get would increase.
  • 0


metalmeltr
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 426
Joined: Thu Dec 18, 2008 3:42 pm
Location: united states
Reputation: 0

Unread postAuthor: Patto » Thu Feb 25, 2010 11:05 pm

So is there a good way to make a hammer valve for a Qev running @ 800psi ??
  • 0

User avatar
Patto
Sergeant
Sergeant
 
Posts: 96
Joined: Wed Jan 20, 2010 7:08 pm
Reputation: 0

Unread postAuthor: POLAND_SPUD » Thu Feb 25, 2010 11:16 pm

in order to reduce the amount of force needed to open the valve you could make it a partially balanced design
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Sponsored

Sponsor
 


Unread postAuthor: Patto » Wed Mar 03, 2010 12:31 am

POLAND_SPUD wrote:in order to reduce the amount of force needed to open the valve you could make it a partially balanced design


Yeah i've looked into this (BTB's - excample) but i couldn't understand how it worked. i need something like his push buttton but need it to be chamber sealing and travel through the "T" upwards .. (if that make's any sense ?? )

Can anybody help me with this please .... ?
  • 0

User avatar
Patto
Sergeant
Sergeant
 
Posts: 96
Joined: Wed Jan 20, 2010 7:08 pm
Reputation: 0

Unread postAuthor: POLAND_SPUD » Wed Mar 03, 2010 12:49 am

the valve used by this guy is a partially balanced spool valve

:D

both balanced and unbalanced designs have their advantages and disadvantages... balanced valves can be opened easily regardless or pressure but that means they open as fast as you open them :)

force needed to open unbalanced valves will increase (or drop) as the pressure increases
but this can be a good thing as you can use the same principle that's at work in case of QEVs/piston valves (once the piston unseats air acts on the other side of it (which slams it open even more))
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: Patto » Wed Mar 03, 2010 12:52 am

poland wrote:the valve used by this guy is a partially balanced spool valve



hehehehehe :lol: :lol: - good one :D

so what would be your suggestions ??
  • 0

User avatar
Patto
Sergeant
Sergeant
 
Posts: 96
Joined: Wed Jan 20, 2010 7:08 pm
Reputation: 0

Unread postAuthor: POLAND_SPUD » Wed Mar 03, 2010 2:04 am

you already have a balanced valve but you didn't know it... you just have to attach the chamber to the other port (the one that now leads to the barrel)

possibly you'd need an o-ring near the other end of that bolt...



if you want to convert that to a partially balanced valve one side of it would have to have larger area than the other... then you just add a hammer and that's it (well you have to make sure that it seals and that at 800 psi the hammer would be able to open it... but it goes without saying I guess)
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Previous

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], farcticox1, Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'