We at Micro Matic try to maintain our database of brands of draft beer and the system of valve they use in their kegs. However, as there are literally tens of thousands of breweries and brands of beer available it's simply not possible to maintain a listing of every brand of beer.
For those brands of beer not covered in our listing, we recommend simply inquiring about the system of keg coupler with the company from which you are purchasing your kegs. If they do not know, they can make a quick call to the beer distributor or brewery to find out this information for you.
Link to see to our beer brand cross reference listing.