Condensor Flash Tank

High pressure flash tanks are designed for flashing of high pressure with high temperature condensate and divides it into

1 - lower pressure steam which can be used again with low pressure equipments like steam humidifiers, cooking kettles or low pressure heating supply mains.

2 - Low temperature condensate which driven to steam condensate tank

Low pressure flash tanks used to reduce and cool to low-pressure steam before

re-introducing it to the boiler, condensate receiver, or discharge directly into sewer.

what will be happen when is not present

1 - you will lost some amount of energy which recovered by flash tank.

2 - condensate flashing will occurred in cool condensate pipes and and forming a steam pockets. As steam pockets looses its latent heat, It will Vanish. The walls of water comes back together and creating water hammering in condensate pipes.