The dealer here sold me a fast valve for my system.  did not work. Kept hunting for the correct value all the time.  Dealer said he did not sell the whole unit to me so it was my problem.   Solved the problem by buying a new applicator from a different dealer. 

I looked at may other peoples and company systems out there, after I had my problem, and nobody had a fast valve on theirs.  No mater how big the applicator.  They where all standard valves.