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