Any online shops in Germany selling valves etc for air compressors?

Anyone have any idea about web sites in germany that would sell these kind of valves:

Pilot unloader valve:

In tank check valve:

Also if you guys could tell me what these 2 valves are called in German that would be appreciated

Thanks

Zitat von *bigstyle*

do you mean this parts?

Überdruckventil:
http://www.kompressor-teile.de/Anbauteile/-Er…e:::95_156.html

and

Rückschlagventil:
http://www.kompressor-teile.de/Anbauteile/-Er…e:::95_124.html

the last valve you linked to is correct - but not the first one, the other one I'm after is called a "Pilot unloader valve" - and is mostly used on gas-powered compressors so the engine can run continiusly by "unloading" the pressure from the compressor - so the motor runs, but the compressor don't produce any air.