Sandeep, There are many books to be found out there on media filtration design, which would provide you technical fundamentals on design of you system.  Once such book that might provide you the technical reference you are seeking is “Filter Troubleshooting and Design Handbook”: By Richard P. Beverly. Manufacturers of Media Filtration products, such as Evoqua, will have their own design practices.  Most proprietary to try and sustain some level of competitive advantage on what has really become a commodity type of technology.  The media you have chosen has defined design flow specifications as provided by the manufacturer, which you has identified.  The required media depth, specified media design flux (gpm/ft2), and market standard vessel diameters will define your vessel size.  Pressure vessel MFG’s will have common shell diameters based upon their tooling.  Although you can have any custom diameter fabricated, the cost is not justified in terms of beneficial filter performance.  The standard diameter that most closely supports your design requirements will define your vessel diameter.   I use the following rules of thumb in choosing a design flux rate, if not specifically defined by the media MFG. Service Flux rate               Anticipated % Particle Removal (gpm / sq.ft.)                                    (Particles > 40 mm)          (Particles < 40 mm) 15                                                        70%                                     50% 12                                                        80%                                     60% 10                                                        90%                                     70% 8                                                          96%                                     75% Pressure loss through the unit, both during service and backwash, will of course depend on your media profile, but will also be dependent upon your internal distribution design.  There are various distribution designs.  Most common for MMF would be a hub and radial design for lower collection and a splash plate upper distributor.  Typical design pressure loss for such distribution is ~3-4psid.   Hope this helps.

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Sandeep,

There are many books to be found out there on media filtration design, which would provide you technical fundamentals on design of you system.  Once such book that might provide you the technical reference you are seeking is “Filter Troubleshooting and Design Handbook”: By Richard P. Beverly.

Manufacturers of Media Filtration products, such as Evoqua, will have their own design practices.  Most proprietary to try and sustain some level of competitive advantage on what has really become a commodity type of technology. 

The media you have chosen has defined design flow specifications as provided by the manufacturer, which you has identified.  The required media depth, specified media design flux (gpm/ft2), and market standard vessel diameters will define your vessel size.  Pressure vessel MFG’s will have common shell diameters based upon their tooling.  Although you can have any custom diameter fabricated, the cost is not justified in terms of beneficial filter performance.  The standard diameter that most closely supports your design requirements will define your vessel diameter.   I use the following rules of thumb in choosing a design flux rate, if not specifically defined by the media MFG.

Service Flux rate               Anticipated % Particle Removal

(gpm / sq.ft.)                                    (Particles > 40 mm)          (Particles < 40 mm)

15                                                        70%                                     50%

12                                                        80%                                     60%

10                                                        90%                                     70%

8                                                          96%                                     75%

Pressure loss through the unit, both during service and backwash, will of course depend on your media profile, but will also be dependent upon your internal distribution design.  There are various distribution designs.  Most common for MMF would be a hub and radial design for lower collection and a splash plate upper distributor.  Typical design pressure loss for such distribution is ~3-4psid.  

Hope this helps.