MID/AN/112

Repair to 8 cusec discharge 43mtr HC pump unit no. 02 installed at LIS Jogwan . The job involves decoupling of the pump from motor by unfastening the coupling nuts and bolts , removing the top cover, extraction of shaft and impeller assembly together with bearing brackets by using skilled technicians and shifting the same to workshop by using manual labour and mechanical transport . Dismantling of the impeller shaft assembly and separating shaft, impeller and bushes. Rebuilding of impeller by using good quality electrodes. Turning/machining of rebuild impeller on lathe machine for proper size. P/F of 2-nos. sleeves and 2 nos. bearings as per sample. Providing/fabrication of neck rings ( 2 nos.). Re-assembling of impeller shaft assembly & shifting back to L.I.S. Greasing of all the parts. Fitment of impeller shaft assembly in the pump at proper position & closing the top cover by p/f of new nuts, bolts, washers and packing. Providing fitting of coupling bolts,nuts (4 nos.) along with rubber bushes as per sample. Job also includes providing / fitting of gland packing , greasing work etc. Thereafter coupling with motor, alignment setting, testing of pump on load. Complete job includes the cost of material, labour charges, to and fro carriage charges, hire charges of tools and tackles etc. Complete Job

De-silting of 300mm dia foot valves of pumping unit no. 1 &2 at Jogwan by way of decoupling the foot valve by cutting/unfastening the nuts and bolts from suction lines . Extraction of foot valves out of river with help of manual labour. Dismantling of foot valve after unfastening/cutting the nuts & bolts. Cleaning of foot valve from mud and silt by washing with water . Repair by way of welding to damaged body and strainer of foot valve. Assembling the foot valve and P/F of new rubber packing sheet, nuts and bolts etc. Lowering the foot valve in the river & coupling with suction pipe by providing new rubber packing sheet, nuts bolts and washers. Checking for leakages. Priming the pump & testing/commissioning on full load. The job includes cost of material, labour, transportation etc as per site conditions of LIS Jogwan.

Repair to 180 HP three phase induction motor of pumping unit no.1 installed at LIS Jogwan . The job involves demounting the motor by unfastening the foundation nuts and bolts and also decoupling from the pump and disconnecting the electrical connections from the main supply and shifting to a safer place for repair at the Lift station. Then complete dismantling of the motor involves extraction of rotor from stator followed by cleaning of stator and rotor using compressed air, organic solvent, CCL4 etc. to remove the dust particles /silt etc. Extraction of burnt winding from the stator, cleaning of stator with petrol .P/F of new winding wire of suitable gauge & size in the stator, varnishing the stator winding with superior quality of varnish. Drying the stator winding with hot air circulation process. P/F of NU 319 C3 bearing. Assembling of the motor . Refitting the motor at its installed position and coupling with pump, making of electrical connections, alignment with pump , testing of motor on full load. Complete job includes the cost of material, labour charges, hiring charges of tools & tackles, transportation charges. Complete Job

Restoration by strengthening of 180 HP motor of pumping unit no. 2 installed at LIS Jogwan . The job involves dismantling the motor by unfastening the foundation nuts and bolts and also decoupling from the pump and disconnecting the electrical connections from the main supply. Then complete dismantling of the motor involves extraction of rotor from stator followed by cleaning of stator and rotor using compressed air, organic solvent, CCL4 etc. to remove the dust particles /silt etc. Varnishing the rotor and stator with Dr. Beck compound or equivalent make of varnish in two coats, drying by hot air process. Thereafter checking the IR value using megger meter. Providing /Fitting of driving end bearing and greasing properly . Assembling of the motor . The job also includes cleaning of aluminium and copper cable by using PF solvent to make it moisture and silt free .Providing/fitting of thimbles as per sample which includes crimping . Refitting the motor at its installed position and coupling with pump, making of electrical connections, alignment with pump testing of motor on full load. Complete job includes the cost of material, hiring charges of tools & tackles, transportation charges from and to the site of LIS. Also labour charges for skilled and semiskilled labour to be employed at site for execution of job including the out station charges etc. Complete job

GANPATI ELECTRICAL AND MECHANICAL WORKS

N B Engineering and Electric Works