Dear M.P Yadav,

This is reference to the  discussion  just we had few minute ago,

As all the feed tanks are over ground (22 to 26), we recommend positive suction centrifugal pumps and not submergible.
Base on our past experience we are comfortable with centrifugal pumps. These two feed pump from Tank 22 ( one for normal operation and one standby) is Technoforce scope of supply. Both the pumps are with single mechanical seals.

As we discussed, front side 1 to 1.5 meter space blockage due to pumps is not acceptable at your end , you can manage both the pumps backside of tanks (22), where 8 to 9 meter space is available. 
