C550 PLT CLAIMS DVT IFR DEP PROC IN CONFLICT WITH EXPECTED RADAR VECTORS USUALLY OBTAINED WHEN AIRBORNE.

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DVT ROUTINELY ISSUES A CONFLICTING CLRNC TO IFR DEPS. THEY ISSUE THE CLRNC 'CLRED TO XXX VIA THE DEER VALLEY PUBLISHED INST DEP PROC; EXPECT RADAR VECTORS TO THE PXR 336 DEG RADIAL TO THE DRK 127 DEG RADIAL DRK AS FILED.' THE PUBLISHED DEP PROC TELLS ME TO INTERCEPT THE PXR 336 DEG RADIAL; YET THE TWR ADVISES TO EXPECT VECTORS. WHEN I QUESTION THE CLRNC; AM I TO FLY THE PUBLISHED DEP PROC OR CAN I EXPECT VECTORS TO THE PXR 336 DEG RADIAL; THE CLRNC IS REREAD THE SAME WAY. THE TWR WILL NOT ISSUE A VECTOR HDG. THE APCH CTL IS EXPECTING THE ACFT TO INTERCEPT THE PXR 336 DEG RADIAL ON HIS OWN; NOT A VECTOR TO INTERCEPT. I NOW OF AT LEAST 3 INSTANCES OF ACFT FLYING RWY HDG ON DEP EXPECTING A VECTOR FROM THE APCH CTL TO THE PXR 336 DEG RADIAL. I HAVE TALKED TO THE CHIEF OF DVT AND THE QUALITY ASSURANCE STAFF AT PHX TRACON. THIS CONFUSION IS FALLING ON DEAF EARS. EVENTUALLY; A LOSS OF SEPARATION OR NMAC WILL RESULT UNLESS THE CONFUSION IS TAKEN OUT OF THIS CLRNC. CALLBACK CONVERSATION WITH P50 SPECIALIST REVEALED THE FOLLOWING INFO: ANALYST CALLED P50 SPECIALIST. SPECIALIST ADVISED THAT FACILITY INVESTIGATED PLT AND CTLR CONCERNS ON DVT IFR DEP PROC. P50 EVALUATED DVT CTLR'S CLRNC PHRASEOLOGY TO ENSURE THAT AN INCORRECT PLT INTERP WAS NOT CONVEYED. THE SPECIALIST EXPLAINED THAT DEPARTING PLTS OFTEN ARE ISSUED RADAR VECTOR HDGS ON INITIAL CONTACT FROM P50; BUT IF OTHER TFC CONDITIONS EXIST; AND THE CTLR CANNOT IMMEDIATELY ISSUE A VECTOR HDG; THE PLT IS EXPECTED TO INTERCEPT AND RESUME THE PUBLISHED IFR DEP PROC. THE SPECIALIST ADVISED SOME PLTS CONTINUE ON A 060 DEG HDG; AND ARE CHALLENGED BY ATC ABOUT THEIR NON COMPLIANCE. P50 HAS COORD WITH DVT CPR PLTS ABOUT THIS DEP PROC AND ITS EXPECTED APPLICATION.