Are you talking of the short valves that do not stick out further than the wheel rim?
I've seen them used before with no issues. Not all tyre fitters stock them, so you may have to provide your own.
2013 C63 AMG coupe "T-Rex", 1999 C43 AMG saloon "Grandma" (sold), Ultima Sports Can-Am (sold)
I have them on all my alloy rims. They are changed for new ones every time I change the tyre. Can't be changed without removing the tyre as they are pulled through the valve hole from the inside. Never had any problem and look neat also.