HYDRAcap MAX ultra-filtration membrane simulator is Hydranautics’ first web based program that is being used by hundreds of customers worldwide. It is extremely user friendly. Entering just a few inputs, the simulator works out all the parameters of the HYDRAcap MAX system. It also allows the user to easily modify the designs to suit requirements. It produces a compact graphical process overview. More detailed design can also be obtained. The best feature is the simulator works out process sequence diagram for the design that saves many hours of work of a process engineer.