HI 1080847,
A flash separator for a liquid at it's bubble point,can be worked by putting a PRV (pressure reduction valve) up stream of the separator,at which point you will have Two phase going into the separator..
Email me the composition and I will send you the results..
Ofcourse,it will also work if you use a sinle stage column..
Try it..and good luck
wayil@hotmail.com