[manizamudeen]

I know the pressure & flow rate of the chilled water system but I have no clear Knowledge which type of pump is to be select for proper operation because there are various type of chilled water centrifugal pump like Horizontal split case, single/multi stage end suction, etc... please give me details.

[hvac1000]

Usually those decisions are left to the engineer in charge of the project you are working on. The selection of the proper pumps for any system depends upon the design criteria along with a host of many calculations. If necessary you may try to contact a few of the main pump manufactures to see if they will look over your plans to make a suggested pump selection for you but they will tell you in advance that they will not accept any liability for the consequences of using the pump they recommend.

No one here that I am aware of does pump calculations and any calculations I need are done by staff engineers at the university.