Parmar, There are a lot of ...
Parmar, There are a lot of parameters you have not mentioned, such as Water Chemistry, Permeate Goals, Percentage of Recirculated Concentrate, etc. But loosely put; Pre Filtration to protect Membranes from Abrasion Damage, a Pressure Pump producing 150 psi., your Membranes need to be at Least Twice of your required water production (due to waste), Storage for Product Water, a Delivery Pump from Storage to Point Of Use, and if water is for Consumption a way to Sanitize that water (Chlorination or UV).