After getting myself some advice from Timo I do now know enough to proundly present to you the definitive guide on biking valves.
German valve types
There are three types of so-called special biking valves in Germany. On my bike a Sclaverant valve – better known in Germany as Frensh valve – is used. This type of valve seems to be especially good in keeping high pressure of up to 12 bar.
Pumping it up
For those valves there are special bicycle pumps. You should really use those to inflate your tires, because if you use a cheap pump from a discounter and use some kind of adaptors you risk severe damange of your valves. Especially with Frensh valves a good hub is critical – otherwise you will be unable to reach an acceptable pressure or the air will vanish during inflation.
When you buy a new bicycle pump you should ensure it has a special clamp to fix the position of the pump on the valve – I said before that a good hub is critical and you safe yourself a considerable amount of time if you got a clamp. Again this is especially true for Frensh valves.
Standard bicycle pumps can serve all three types of valves outlined above. Usually you can unscrew the stub of the pump and change a pivot to fit either Dunlop and Frensh valves or Car valves.
For home use consider buying a solid standing pump (around 15€). For en-route use consider a foldaway pump (around 10€) or a standard bicycle pump (around 7€). Professional en-route or emergency type users might prefer an automatic inflation system (around 25€) utilizing CO2 cartridges (10 pieces around 3€).
