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 92 users online :: 5 registered, 0 hidden and 87 guests


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

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

High Pressure dump valves for piston operation

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

High Pressure dump valves for piston operation

Unread postAuthor: Jolly Roger » Fri Sep 01, 2006 8:50 am

I've got a question regarding valves. I was looking at snipermans rifle and found that it's relatively similar to my design I'm still experimenting with. My setup is pretty much the same but I need a valve that can handle a relatively high pressure (300-440psi working pressure, and no it isn't made from pvc...) The trouble is finding one though. I've thought about just attaching a blowgun of some sort. That ghetto dude hooked his up to a hpa tank which is crazy but if it hasn't killed him yet I'm pretty sure it would be able to handle between 300 and 400psi...? Dunno. Heres some links to some of the valves I found. 1. http://www.bhdustcollectors.com/diaphragmvalvesbase.htm These are jet valves - used in dust collectors... ?I think they are exactly the same as a sprinkler valve by the looks and characteristics but I can't tell. The tech specs are so confusing... PCguy uses the same brand of valve on his launcher but I don't know if they work the same. 2. http://www.pvl.co.uk/valves.htm The second is a pilot operated piston valve (down the page) that can go up to 15bar. That'd be perfect except I was wondering if I could take the solenoid off and connect a pneumatic trigger just like a normal sprinkler valve. Wires and batteries are a pain in the ass. Anyone have any suggestions?
  • 0

Last edited by Jolly Roger on Sun Oct 14, 2012 4:12 am, edited 1 time in total.
User avatar
Jolly Roger
Donating Member
Donating Member
 
Posts: 210
Joined: Fri Aug 25, 2006 4:20 am
Reputation: 0

Unread postAuthor: Velocity » Fri Sep 01, 2006 10:01 am

I used the 1.5" Goyen valves on one of my <a href="http://forums.spudtech.com/topic.asp?TOPIC_ID=12497">launchers</a>, and it is only intended to pressures up to 125 PSI; However (unlike a sprinkler valve), this valve is made of aluminum, so when something breaks, it will definitely be the diaphragm.
  • 0

User avatar
Velocity
Brigadier General
Brigadier General
 
Posts: 1039
Joined: Tue Feb 07, 2006 5:42 pm
Reputation: 0

Unread postAuthor: Brian the brain » Fri Sep 01, 2006 10:59 am

I say build your own out of galvanised fittings and a ballvalve as a pilot.
Performance is great, and it can handle high pressures.
Make the piston out of a bolt, metal washers and nuts.Then some neoprene for the sealing surface.
  • 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: Jolly Roger » Fri Sep 01, 2006 9:54 pm

Yeah I was gooing for the realistic firing look, thought about ballvalves but their not really compatible with a rifle style gun. Fire extinguisher valves seem okay. They say that they can handle working pressures of over 290psi which would obviously have a very high burst pressure. I think I might build my own fittings and such as brian suggested. Yeah, now I come to it, I might just use that, KISS, unless of course anyone has any creative suggestions. Always open to ideas.

EDIT: I've dramatically changed my desgin and need a rethink on my valves. I've just stumbled accross some paintball 3 way push button valves... https://palmer-pursuit.com/ecom/product_info.php/cPath/30_39/products_id/462?osCsid=4bcf3a0161d948a334b50ce798fc3a91 They are high pressure but I need them to work a certain way. I need the valve to instantly swith the air flow from (a to b) to (b to c)... If you follow. Going from a into b and then on the push of a button from b into c. I've attached a diagram to explain. Can anyone tell me if Im able to do this with these valves? I'm really stuck... (oh and by the way point b is the exhaust end of a piston cannon if that may aid in analysis.)
  • 0

Attachments
3 Way valve - 2 directional flow.JPG
3 Way valve - 2 directional flow.JPG (10.74 KiB) Viewed 1406 times
User avatar
Jolly Roger
Donating Member
Donating Member
 
Posts: 210
Joined: Fri Aug 25, 2006 4:20 am
Reputation: 0

Unread postAuthor: dinsdale » Sat Sep 02, 2006 3:32 pm

for your piston you could still use pvc rod, it would be lighter that steel, therefore faster, a solid pvc piston inside the pressurized metal tube will hold up
  • 0


dinsdale
Sergeant
Sergeant
 
Posts: 91
Joined: Sun Aug 27, 2006 12:16 pm
Location: Bowmanville, Ontario (canada)
Reputation: 0

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'