Talk:Schrader valve

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Another image[edit]

How about this 1921 advertisement for Schrader valve caps? --Christopherlin 06:43, 22 January 2006 (UTC)

Access Valves[edit]

I was informed today that the true name for a Schrader Valve is actually Access Valve. I don't remember the conversation vividly, but I believe it had something to do with Schrader being a trademarked name for a brand of Access Valve. Anyone out there who can shine some light on this? PantherFoxie 23:30, 10 August 2006 (UTC)

Non-cycling applications[edit]

Schrader (Shrader, Shraider) valves are also used in water distribution and storage tank applications. I'm not an expert and cannot explain all their modes of operation, but one purpose is to release excess air from a water system. In a pressure tank, they may also allow air to enter to maintain the correct balance. I hope someone can add this type of information to this entry an disambiguate it from the cycling application. —Preceding unsigned comment added by (talk) 16:20, 16 November 2007 (UTC)

In water based house-heating systems a Schrader valve is used to fill air or N2 in the bladder of the presssure stabilizing expansion vessel. A modified Schrader valve - with a floater - is used in self-acting vents on the very top of pipes. Via Schrader valves cooling medium is filled into the air conditioning of cars, small powder fire extinguishers are filled with nitrogen or pressure-checked. --Helium4 (talk) 08:47, 8 August 2010 (UTC)

Valve Animation[edit]

I created an animation of a valve that opens and closes, because I think it is easier to understand than text and static images. How can I put the image on the page? —Preceding unsigned comment added by (talk) 17:51, 21 May 2008 (UTC)

This illustration is misleading, the spring bears against the outer core and pushes up on the inner core, helping to seal the valve. Greglocock (talk) 02:09, 1 July 2009 (UTC)
I think this article as it stands now (FEBRUARY 2010)is an EXCELLENT example of what a small, very concise wikipedia article should be. Looks VERY professional....good job, guy!!

I like how it clearly states that Schrader valves are NOT just for bicycle tire/auto tire applications, but also an assortment of other applications. The best aspects of this article3 are the detailed diagram and the animation of the valve in action. That video is NOT misleading. It clearly shows the spring-pin going down when air is added, and rising back up to seal the valve when the procedure is finished. Like I previously said: a very professional article!! Good job. Pragmaticus123 (talk) 17:46, 11 February 2010 (UTC)

Looking once again at the animated diagram, I see why Greglocock may have a slight problem with it...but I am not sure of the actual placement of the spring in a real schrader valve. If the spring is at the bottom,as it shows, it would have to be a compression spring to seal...if at the top, it would need to be an extension spring. Be that as it may, I believe that the animation, as it stands, is good enough to show the approximate workings of a Schrader valve...splitting hairs about the spring placement would not add to the general understanding of its operation. —Preceding unsigned comment added by Pragmaticus123 (talkcontribs) 18:05, 11 February 2010 (UTC)

Errors in the - nice drawn - animation: 1. Pressed Spring is seen to expand while valve is opened manually, so helps to open the valve. In reality this spring functions the opposite way. 2. No blank frames between emptied tube (elastic vessel) and filled tube give the impression that the tube is filled quick but live in the animation. Being in conflict with the valve that stays closed. --Helium4 (talk) 09:09, 8 August 2010 (UTC)

Schrader vs Presta[edit]

This addition

"the lack of a spring on the Presta means that full applied air pressure is transmitted to the tire, unlike the Schrader, where, unless a central valve opening pin is used in the inflator, the tire pressure is reduced by the force necessary to press the spring, which supposedly is on the order of 20 psi. This consideration generally applies to some portable bike pumps and the necessity of achieving accurate high pressures."

has at least two issues:

  • What really is the pressure required to open the valve? Even the Schrader site doesn't give a value. Without a source, that detail should not be included.
  • Are there really pumps that do not include the central pin for opening the valve? Why, who would use them when accureate high pressure is required, and can we find a source for any of this? -AndrewDressel (talk) 15:04, 8 May 2010 (UTC)
Random survey of 3 inflators in this house all have the central pin. Sounds to me like a valve snob (I'm sure they exist) is grasping at straws. My advice is to get a cheap pump like mine if you really think it is a big deal. Or switch to Prestas, which of course have their own idiosyncracies. People who are serious about high pressure use the big two handed pumps, the little ones are just to get you home.Greglocock (talk) 00:18, 9 May 2010 (UTC)
A kind of - useful - adapter ist to be screwed on a Schrader valve, opens it with a central pin, but closes the starting blowout quickly with an internal ball valve (steel ball (in cage, no spring) in plastics or brass conical seating). Makes pumping up more easy, closes enough tight to hold the reached air pressure for one minute. --Helium4 (talk) 07:51, 8 August 2010 (UTC)


What about the Woods valve, onece popular with bicycle innertube manufacturers . . . not worthy of note? —Preceding unsigned comment added by (talk) 12:49, 28 April 2011 (UTC)

Au contraire, my friend. The Woods valve, aka Dunlop valve, even has its own article. I'll update the see also section to make that more clear. -AndrewDressel (talk) 12:56, 28 April 2011 (UTC)
Thanks Andrew, that answers a puzzle I've had for twenty years! Greglocock (talk) 00:49, 29 April 2011 (UTC)

Inline citations[edit]

This page appears to be severely lacking in terms of inline citations. Actually, the only source cited appears to be from a catalog, with no page numbers or other information to narrow down the search. — Preceding unsigned comment added by Gleblanc (talkcontribs) 16:32, 26 January 2012 (UTC)

It's interesting to me that many Wikipedia articles will have a "complaint" from 4 or 6 years ago saying "this article needs more citations". Yet nothing ever happens. As someone else mentioned on this Talk page, the article looks fine, yet I understand Wikipedia's desire for "no original research". On the other hand, the original research that is probably in this article will probably never change. At least that's my guess! (talk) 21:19, 12 October 2016 (UTC)

Tyre vs Tire[edit]

Don't want to start an edit war or anything, but I've only ever seen it spelled 'tire', and this article spells it 'tyre' in 20 places, and 'tire' in 6. Whichever is the correct one should be used throughout, IMHO. — Preceding unsigned comment added by (talk) 23:09, 13 May 2013 (UTC)

Fixed a couple. The rest are names of categories or in templates. -AndrewDressel (talk) 01:05, 14 May 2013 (UTC)
Went through and fixed them all. This is an article about an American valve so definitively American in its Americanity that they named it "the American valve" secondary to crediting its American inventor. It deserves to be juxtaposed with the proper American spelling of the American tires into which it typically serves to funnel compressed American air. - — Preceding unsigned comment added by (talk) 05:59, 12 September 2013 (UTC)
Hmmm. WP:RETAIN says "When an English variety's consistent usage has been established in an article, it is maintained in the absence of consensus to the contrary. With few exceptions (e.g. when a topic has strong national ties or a term/spelling carries less ambiguity), there is no valid reason for such a change." So it appears that if we can reach consensus, then we can go ahead and change it. Otherwise, we should leave it alone. I've given up worrying about how tire is spelled years ago, so I'm neutral on this. -AndrewDressel (talk) 13:07, 12 September 2013 (UTC)
American company, American invention, unimpeachable ref now added that a Schrader valve is also known as an "American valve"... srsly... --Shirt58 (talk) 10:41, 23 October 2013 (UTC)
Yes; I just hadn't gone back far enough to see it had been changed from "tire" to "tyre" before the IP started changing it back. Pinkbeast (talk) 13:34, 23 October 2013 (UTC)
Nice job on the reference. -AndrewDressel (talk) 13:08, 24 October 2013 (UTC)