Opening Dunlop (Woods) valve

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I'm having trouble inflating the tire on my Dutch bike (I now live in the UK, no longer NL, by the way). It's got what I'm pretty sure is a spring-loaded or one-way Dunlop valve. As you can imagine since the valve is on my desk, the tube is now deflated.

The problem, I think, is that I can't get the valve to open. I'm using a reasonably potent two-cylinder pedal pump, but I can't seem to force air through the valve. When everything is seated properly to pump the tire, if I contort myself to hold the nozzle of the pump as tightly against the adaptor and valve as possible, the gauge on the pump gets up to around the 5 bar/70 psi mark, but the valve still doesn't seem to open, and no air is getting into the tube.

Any thoughts on how to solve this?

[GeorgeET]

Scroll down for info and links to woods valve. Could be you need a replacement.


http://sheldonbrown.com/gloss_w.html#woods

[nfmisso]

It might be time to convert to Presta valved tubes.

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(05-11-2014, 12:50 PM)nfmisso Wrote:  It might be time to convert to Presta valved tubes.

Just about. I decided the easiest solution was to get a new inner tube. As long as I was at it, I got one with a Schrader valve.

[GeorgeET]

Yeh the schrader valve will fit without an adopter. Had no luck with presta. PITA.......YMMV.

[DaveM]

In my experience, these clog up more than either schraeder or presta, but work very well otherwise. Usually you just need to replace the valve core.