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blow into/thru a Dunlop valve
If you blow into a Dunlop valve, from either
direction, and then compare this to doing the same thing with another Dunlop valve, the amount of air that gets thru isn't the same. But what is the difference, exactly? -- underground experts united http://user.it.uu.se/~embe8573 |
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blow into/thru a Dunlop valve
On 4/23/2018 6:36 PM, Emanuel Berg wrote:
If you blow into a Dunlop valve, from either direction, and then compare this to doing the same thing with another Dunlop valve, the amount of air that gets thru isn't the same. But what is the difference, exactly? Air going in passes through the top pin hole under the rubber tube segment and into your inner tube. Air cannot go back out the other direction through that hole so one must undo teh top nut to let air escape ( as you noted in prior post). I think what you describe is one valve which works and one which is damaged. Usually just replace the rubber tube segment. Those were once included in patch kits but are now less commonly found. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
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blow into/thru a Dunlop valve
AMuzi wrote:
Air going in passes through the top pin hole under the rubber tube segment and into your inner tube. Air cannot go back out the other direction through that hole so one must undo teh top nut to let air escape (as you noted in prior post). Right, then the preassure from inside the tube dislocates the whole thing, away from the opening to let the air out? But just isolating the valve, how does it (the valve) work? The rubber is a loose lid over a cylinder. Blow from within the little pipe, the lid lifts just a bit to let thru air. Blow from the outside, it stays down? (Here the "outside" is actually the inside of the tube.) Is this correct? Why does the Dunlop deteriorate? The rubber looses its freshness/moisture to shrink and not cover the hole? What about lubing it? -- underground experts united http://user.it.uu.se/~embe8573 |
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