Vapor–liquid separator
（重定向自Flash drum）
![A typical vapor–liquid separator including commonly a de-entrainment pad and sometimes an inlet distributor.](/Images/godic/202501/13/Vap-Liq_Separator5855.png")
A vapor–liquid separator is a device used in several industrial applications to separate a vapor–liquid mixture.
A vapor–liquid separator may also be referred to as a Flash Drum, Breakpot, Knock-out drum, Knock-out pot, Compressor suction drum or Compressor Inlet Drum. When used to remove suspended water droplets from streams of air, it is often called a demister.