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 :: 3 registered, 0 hidden and 68 guests


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

Registered users: Bing [Bot], Google Adsense [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

QEV crash course?

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

QEV crash course?

Unread postAuthor: Aeolus » Thu Nov 02, 2006 7:46 pm

Okay, so i've built my pneumatic, and am very excited about shooting it off, i hope to do so tomorrow or this weekend sometime, and i'm using a sprinkler valve for the pressure release, however, i've recently heard of quick exhaust valves, and couldn't find any good information on them and was wondering if someone could give me a crash course on QEVs and a good place to get them from? thank you!
  • 0


Aeolus
Private
Private
 
Posts: 3
Joined: Tue Sep 19, 2006 11:03 am
Reputation: 0

Unread postAuthor: SpudStuff » Thu Nov 02, 2006 8:03 pm

Get them from http://www.Mcmaster.com.
It is like a pre mofified sprinkler valve with equal or greater flow than a equal size sprinkler valve. Check ebay for them they often have big ones for cheap.
  • 0

User avatar
SpudStuff
Major General
Major General
 
Posts: 1410
Joined: Sat Dec 10, 2005 3:55 pm
Location: Cupertino, California
Reputation: 1

Unread postAuthor: sgort87 » Thu Nov 02, 2006 9:15 pm

3/4" QEVs are more powerful than 1" sprinkler valves.
  • 0

<a href="http://www.launchpotatoes.com"><img src="http://www.launchpotatoes.com/images/uploads/logo2.PNG"></a>
http://www.LaunchPotatoes.com
User avatar
sgort87
Donating Member
Donating Member
 
Posts: 1038
Joined: Sun Sep 18, 2005 10:32 am
Location: Lockport, Illinois
Country: United States (us)
Reputation: 1

Unread postAuthor: SpudStuff » Thu Nov 02, 2006 9:19 pm

Thank you gort!
  • 0

User avatar
SpudStuff
Major General
Major General
 
Posts: 1410
Joined: Sat Dec 10, 2005 3:55 pm
Location: Cupertino, California
Reputation: 1

Unread postAuthor: mark.f » Thu Nov 02, 2006 10:40 pm

A Q.E.V. is an outlet sealing valve. The piston is cone-shaped, so when it is pressurized from the pilot, the cone bends and lets air through the CYLINDER port. When the pressure equalizes, the cones expands back against the walls of the piston carriage and seals. When the pilot is exhausted, the cone shape doesn't allow air to push around the piston, so you get almost instantaneous exhausting with little pilot pressure drop.

And Gort, 1-1/2" quick-exhausts are more powerful than 3/4" quick-exhausts. :P
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: Aeolus » Thu Nov 02, 2006 11:27 pm

awesome, i'd have to get a 1" qev just b/c that's what would fit with my gun and i wouldn't want to change any more, i'd just want to attach a qev, and also, spudstuff, i couldn't find any qev stuff on that site, maybe i'm looking for the wrong thing though ^.^
  • 0


Aeolus
Private
Private
 
Posts: 3
Joined: Tue Sep 19, 2006 11:03 am
Reputation: 0

Unread postAuthor: MrCrowley » Thu Nov 02, 2006 11:38 pm

has anyone thought of using air suspension valves found on cars?they fetch a fair penny but are made of brass and you can get a 1" one for around $80NZD($45US?)but it should be cheaper over in the USImage
  • 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

Sponsored

Sponsor
 


Unread postAuthor: SpudStuff » Thu Nov 02, 2006 11:50 pm

Yes , that is a asco and has a extremly small orfice. It is good for prettymuch nothing.
  • 0

User avatar
SpudStuff
Major General
Major General
 
Posts: 1410
Joined: Sat Dec 10, 2005 3:55 pm
Location: Cupertino, California
Reputation: 1

Unread postAuthor: MrCrowley » Fri Nov 03, 2006 12:25 am

ohh that explains alot,always wanted to know what an asco was....thanks for that.
  • 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: Aeolus » Fri Nov 03, 2006 9:30 am

haha, well, i'm shooting off my gun today or tomorrow, i hope it works, and then i'll post pics of my gun so yall might be able to suggest a qev for me to use
  • 0


Aeolus
Private
Private
 
Posts: 3
Joined: Tue Sep 19, 2006 11:03 am
Reputation: 0

Unread postAuthor: sgort87 » Sat Nov 04, 2006 12:50 pm

markfh11q wrote:And Gort, 1-1/2" quick-exhausts are more powerful than 3/4" quick-exhausts. :P


Yup, and I got 2 of those that I still need to use for something.
  • 0

<a href="http://www.launchpotatoes.com"><img src="http://www.launchpotatoes.com/images/uploads/logo2.PNG"></a>
http://www.LaunchPotatoes.com
User avatar
sgort87
Donating Member
Donating Member
 
Posts: 1038
Joined: Sun Sep 18, 2005 10:32 am
Location: Lockport, Illinois
Country: United States (us)
Reputation: 1

Unread postAuthor: POS » Sat Nov 04, 2006 2:31 pm

MrCrowley wrote:has anyone thought of using air suspension valves found on cars?they fetch a fair penny but are made of brass and you can get a 1" one for around $80NZD($45US?)but it should be cheaper over in the USImage


Could anyone tell me what they are used for in a car ? I know a mechanic, I should get some for free.
  • 0

User avatar
POS
Major
Major
 
Posts: 395
Joined: Thu Sep 14, 2006 4:19 pm
Reputation: 0

Unread postAuthor: Torch » Sat Nov 04, 2006 2:38 pm

Air breaks? Air bag shocks? As for the QEV I was wondering, wouldnt a piston be more powerful?
  • 0

User avatar
Torch
Sergeant Major
Sergeant Major
 
Posts: 180
Joined: Tue Jun 27, 2006 2:08 pm
Location: Maryland
Reputation: 0

Unread postAuthor: Animal81182 » Sat Nov 04, 2006 3:41 pm

QEV's are the Doggs, we over in the UK are using them all the time as they are more available than sprinkler valves!

the flow rates are much higher too, i am curently building a 28mm copper chamber launcher with twin 3/4" QEV's so should be pretty awsome the chamber is made from 2 lengths of 35mm copper aswell!!!!!
  • 0

User avatar
Animal81182
Sergeant
Sergeant
 
Posts: 81
Joined: Wed Sep 07, 2005 7:48 am
Location: Uk
Reputation: 0

Unread postAuthor: MrCrowley » Sat Nov 04, 2006 4:01 pm

air bag suspension i believe,i cant remeber but i know it has something to do with them,but spudstuff said theyre useless so maybe theyre not such a good valve to use.
heres a link to some but these ones are 3-way solenoids http://www.trademe.co.nz/Trade-Me-Motor ... 701598.htm
  • 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

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'