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 76 users online :: 5 registered, 0 hidden and 71 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

Maximum safe pressure limit of Schrader/tire valve?

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

Maximum safe pressure limit of Schrader/tire valve?

Unread postAuthor: Ianbuckwell » Sat May 10, 2014 6:29 am

As per the title, does anyone have any info on what the safe working limit of tire/Schrader valves?

Are the any readily available better alternatives ?

PS Sorry should have asked both valve pressure failure, but also failure if fitted through a hole like in a wheel. Do trucked use regular housings/Schrader valves as they must come under a lot of force?

Thanks
  • 0


Ianbuckwell
Master Sergeant
Master Sergeant
 
Posts: 157
Joined: Tue Apr 01, 2014 1:13 pm
Country: Antarctica (aq)
Reputation: 1

Re: Maximum safe pressure limit of Schrader/tire valve?

Unread postAuthor: Gippeto » Sat May 10, 2014 8:23 am

Did you try searching first? Might want to work on your "google-fu" a bit.

pneumatic-cannons/topic15393.html

For pressure over 500psi, the foster fill nipples used in paintball/ pcp airgun setups are far superior to a schrader valve, and readily available.

http://www.amazon.com/Ninja-Paintball-T ... B003FVUO7A
  • 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: 2393
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Re: Maximum safe pressure limit of Schrader/tire valve?

Unread postAuthor: Ianbuckwell » Sat May 10, 2014 9:32 am

Sorry, i didn't, but thanks for link, first one is really interesting. Just wondered if anyone had seen any official indo on their rating, thanks
  • 0


Ianbuckwell
Master Sergeant
Master Sergeant
 
Posts: 157
Joined: Tue Apr 01, 2014 1:13 pm
Country: Antarctica (aq)
Reputation: 1

Re: Maximum safe pressure limit of Schrader/tire valve?

Unread postAuthor: bravootome » Sat May 10, 2014 1:28 pm

Ianbuckwell wrote:Sorry, i didn't, but thanks for link, first one is really interesting. Just wondered if anyone had seen any official indo on their rating, thanks


i use them to 35-40 bar. it's all about how you fix it to the gun and about the quality. The ones for tractors are far much better...as they come in 2 pieces with 2 tipes of threads, an o rings...etc...and they fit to fire extinguisher ,,,,,,,,
.
  • 0

come undone
User avatar
bravootome
1st Lieutenant
1st Lieutenant
 
Posts: 289
Joined: Mon Oct 14, 2013 11:11 am
Country: Trinidad and Tobago (tt)
Reputation: 10

Re: Maximum safe pressure limit of Schrader/tire valve?

Unread postAuthor: Fnord » Mon May 12, 2014 12:05 pm

I've used them at ~1000psi regularly. I would not consider it safe, though catastrophic failure is unlikely. Just don't put your hand right next to it when pressurized.

This also requires that you keep the internal seals very clean, as any dirt or grime will damage the gasket if it gets squeezed against it under pressure.
  • 0

Image
User avatar
Fnord
Major General
Major General
 
Posts: 2244
Joined: Tue Feb 13, 2007 9:20 pm
Location: Pripyat
Reputation: 7

Re: Maximum safe pressure limit of Schrader/tire valve?

Unread postAuthor: cammyd32 » Mon May 12, 2014 5:34 pm

Ianbuckwell wrote:Sorry, i didn't, but thanks for link, first one is really interesting. Just wondered if anyone had seen any official indo on their rating, thanks


Here
As people have already pointed out they are 'safe' to use to far above what they are recommended for, but as far as the pressures they are rated for that is an 'official' schrader data sheet if you wanted specifics.

Just be sure to identify the right valve core you are using, and the data assumes that the limiting factor is the valve core itself as opposed to the valve stem.
  • 0

User avatar
cammyd32
Captain
Captain
 
Posts: 326
Joined: Fri Apr 29, 2011 7:00 am
Country: United Kingdom (uk)
Reputation: 8

Re: Maximum safe pressure limit of Schrader/tire valve?

Unread postAuthor: jackssmirkingrevenge » Tue May 13, 2014 7:51 am

Fnord wrote:I've used them at ~1000psi regularly. I would not consider it safe, though catastrophic failure is unlikely. Just don't put your hand right next to it when pressurized.


A schrader valve failure on the pilot side of an exhaust valve setup could result in sudden firing of the launcher, definitely not safe. On the other hand, I have never seen such a failure on the forum and have myself regularly used automotive schrader valves to 850 psi with compressed air and several thousand psi with hybrids and have never experienced failure or even leaks.
  • 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

Re: Maximum safe pressure limit of Schrader/tire valve?

Sponsored

Sponsor
 


Return to General Spud Cannon Related

Who is online

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

Reputation System ©'