supply installation testing and commissioning of submersible pumping equipment at wss banghinowgam.- 1 supply, installation, testing & commissioning ofopen well pumping units as per is 14220 at filter water stage. pump: - discharge=8000gphhead= 60 metersefficiency = not less than 50% speed = 2900 rpm type of pump = mixed flow. type of fluid to be handled = clear water type of pump:open well verticalsubmersible pumpdual mechanical seals ( 01 no ) and bearings ( 02 no ) for each pumping unit must be provided as spare parts.material of construction: impeller = stainless steel pump shaft = stainless steel ss 410. pump casing = cast iron / stainless steel impeller: impeller is of the enclosed or semi – enclosed type and properly balanced.enclosed impellers equipped with seal rings on their hubs. coupling: a suitable coupling arrangement provided with pump set. non-return valve: - non return valve of the suitable size provided above the pump discharge case. motor:- rating : as per oemmethod of starting = star – delta / speed = 3000 ( sync ) . frequency = 50 ± 3 % hz working voltage = 380-415 ± 15% v, 03 phase efficiency = not less than 90%class of insulation = f / suitable for above parameterssubmersible motor should be water filled water lubricated squirrel cage type having capacity for above pumping parameters and working on 3 phases; ac supply ranging from 380 to 415 volts, 50hz. the motor should be sealed by radial rings to avoid mixing of well water with motor filled water. a ) the job includes providing and fitting of interlocking arrangement against any failure of coupling. it must be fabricated out of ms strips of suitable size and length. b ) the job includes providing and fitting of appropriate size ms nipple 2 feet long threaded on one end and welded to same size ms flange of thickness ( as per table-17 ) at other end for column pipe as per site requirement. the threaded portion should be as per size of pumping out let for proper fixing. the job includes providing and fitting of r. i. cloth joints / rubber washers with nuts, bolts and washers for all joints of column pipe. the job also includes lowering of pumping unit in the well then proper testing and commissioning of pumping unit on full load at site. note: providing of test certificate & characteristic curve of pumping equipment is compulsory and pumping unit is to be approved from the concerned sub divisional office before procuring