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 49 users online :: 5 registered, 0 hidden and 44 guests


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

Registered users: Bing [Bot], 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

What did i just buy?

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
Sponsored 
  • Author
    Message

What did i just buy?

Unread postAuthor: Alex345 » Tue Feb 12, 2013 12:25 pm

I found this BIG valve(ish) thing at a local tool shop in one of it's many miscellaneous boxes. To me it looked like a huge piston valve, but i have been deceived in ways like that a few times before... But since they sold it for dirt cheap i took a chance and bought it!

I just took some photo's, one where it is compared with a normal 3/4 qev and also a few shots of it taken apart. Enjoy;

Image
Image
Image
Image
Image
  • 0


Alex345
Corporal
Corporal
 
Posts: 77
Joined: Sun Jun 13, 2010 3:26 pm
Reputation: 0

Unread postAuthor: Labtecpower » Tue Feb 12, 2013 1:03 pm

Looks like some kind of diaphragm valve to me, judging by the holes in the top and side it is pressure controlled.

Could you unscrew the top cap?
  • 0

"ñøw mÿ šįg šüçkś!"
User avatar
Labtecpower
Major General
Major General
 
Posts: 1267
Joined: Sat Feb 20, 2010 6:38 am
Location: Herb Island
Reputation: 7

Unread postAuthor: MRR » Tue Feb 12, 2013 1:08 pm

According to google, PSV stands for Pressure Safty Valve. The picture search revealed a similar design to this one.

It looks like (could be wrong though) that you can screw in a little pressure release valve which triggers the PSV.
  • 0


MRR
Major
Major
 
Posts: 362
Joined: Tue Feb 17, 2009 2:29 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue Feb 12, 2013 1:13 pm

That must have cost a lot new, nice catch if you got it for peanuts. Agreed with lab, looks like an exhaust valve.
  • 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: Alex345 » Tue Feb 12, 2013 1:29 pm

jackssmirkingrevenge wrote:That must have cost a lot new, nice catch if you got it for peanuts. Agreed with lab, looks like an exhaust valve.
When i got to the cash register i prepared myself for one heck of a price! But then the lady picked it up, put it on a scale to weigh how much brass it was and charged me 10€

I really had to force myself not to start smiling like an idiot XD

Here are some more pictures for Labtecpower without the cap and with the "piston" open and closed:

Image

Image

Image
  • 0


Alex345
Corporal
Corporal
 
Posts: 77
Joined: Sun Jun 13, 2010 3:26 pm
Reputation: 0

Unread postAuthor: Labtecpower » Tue Feb 12, 2013 1:40 pm

With a fancy PTFE sealing face, i'd guess the price is in the three digit range :D

Can't tell how the piloting system works from the pics, I guess the best option is to hook it up to an air source and do some tests hehe
  • 0

"ñøw mÿ šįg šüçkś!"
User avatar
Labtecpower
Major General
Major General
 
Posts: 1267
Joined: Sat Feb 20, 2010 6:38 am
Location: Herb Island
Reputation: 7

Unread postAuthor: Brian the brain » Tue Feb 12, 2013 2:13 pm

Plug the hole on the side, and insert a pilotvalve on top..

Then its a pistonvalve.
  • 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

Sponsored

Sponsor
 


Unread postAuthor: Alex345 » Tue Feb 12, 2013 2:43 pm

Brian the brain wrote:Plug the hole on the side, and insert a pilotvalve on top..

Then its a pistonvalve.
Already plugged it ;) Just need to find a cheap pilot valve with 1/8 threads. Right now the only issue is the fact that the threads on both sides of the valve are massive! The biggest thread size most hardware stores have is 1" so i'll have to look at specialized stores for the right pieces. This thing is truly huge and the pictures simply don't do it justice. A lot of you spudding veterans have probably seen way bigger ones, but for me this is quite a sight :D

I'm getting more excited by the minute! I can't wait to test this thing :D
  • 0


Alex345
Corporal
Corporal
 
Posts: 77
Joined: Sun Jun 13, 2010 3:26 pm
Reputation: 0

Unread postAuthor: Gippeto » Tue Feb 12, 2013 2:43 pm

Good score. 8)
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2394
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Unread postAuthor: Alex345 » Tue Feb 12, 2013 2:57 pm

Ok this is a strange valve :p Apparently you CANT plug the hole on the side because doing so creates a vacuum preventing the piston from moving smoothly.

I will try to draw something up for you guys ;)
  • 0


Alex345
Corporal
Corporal
 
Posts: 77
Joined: Sun Jun 13, 2010 3:26 pm
Reputation: 0

Unread postAuthor: Alex345 » Tue Feb 12, 2013 3:20 pm

Ok here we go :) So now i know that the valve will only function when you leave the extra hole on the side alone, so no problem there. But i would really like to know what it is for :)

Image
  • 0


Alex345
Corporal
Corporal
 
Posts: 77
Joined: Sun Jun 13, 2010 3:26 pm
Reputation: 0

Unread postAuthor: dewey-1 » Tue Feb 12, 2013 3:40 pm

Alex345 wrote:Ok here we go :) So now i know that the valve will only function when you leave the extra hole on the side alone, so no problem there. But i would really like to know what it is for :)


Here is what I think it is;
http://www.eng-tips.com/faqs.cfm?fid=744

Is there any company logo or symbol on it?

I can see: PSV-D 40/40 C ???
  • 0

User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Unread postAuthor: Alex345 » Tue Feb 12, 2013 3:58 pm

Yes PSV-D 40/40 C and PTFE on the other side, which would refer to the sealing face. On the bottom there is CW617N which is apparently the type of brass it is made from. And an arrow pointing to the exhaust side with IB next to it.

And that's all she wrote i'm afraid :p You'd think someone would put a brand name on something that big and probably expensive...
  • 0


Alex345
Corporal
Corporal
 
Posts: 77
Joined: Sun Jun 13, 2010 3:26 pm
Reputation: 0

Unread postAuthor: MrCrowley » Tue Feb 12, 2013 3:58 pm

I'm jealous. That's one cool valve, hope to see it on a ~200PSI cannon in the near future :wink:

Ok this is a strange valve :p Apparently you CANT plug the hole on the side because doing so creates a vacuum preventing the piston from moving smoothly
I guess because it is all o-ringed and what not, actuating the piston would decrease the (atmospheric) pressure in that middle bit if you blocked the hole, thus creating a small vacuum. If that is indeed what happens, just leave the hole open and don't worry about it as no chamber or pilot pressure should reach that middle area.

I'd recommend hooking up the fill line to both the chamber and pilot but with a ball valve to close off the chamber from the pilot when it comes to firing the cannon. Basically means you have a safety valve on the cannon too since triggering the pilot valve probably wont actuate the piston valve if the chamber line is still hooked up to the pilot.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: Brian the brain » Tue Feb 12, 2013 4:22 pm

ah...



you'll need to loop the pilot into the middlesection for it to pop open ..
Or..take out the bottom center O-ring and THEN plug the side.
  • 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

Next

Return to Construction Materials/Ammo Discussion

Who is online

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

Reputation System ©'