Ultra-Filtration drinking water vending machine:  
  Ultrafiltration is a membrane process that is most commonly used to remove suspended or dissolved solids from a process liquid. The membranes are selected to remove impurities based on their molecular weight. Ultrafiltration uses hollow fibers of membrane material. The feed can flow either inside the shell, or in the lumen of the fibers.  
 
F12 model
F13 model
DUV model
OFG model
OSS model
F12
F13
DUV
OFG
OSS