Repairs to 5 cusec x 10 meter head discharge pump set coupled with 25 hp motor of pumping unit No. II along with allied works at L.I.S. Rathana and repairs to electric substation and repairs to 350 mm non return valve installed at Lift irrigation st

Repairs to 5 cusec x 10 meter head discharge pump set coupled with 25 hp motor of pumping unit No. II along with allied works at L.I.S. Rathana

Repairs to 5 cusec x 10 meter head end casing pump by way of decoupling of 25 HP motor of pumping unit no II from pump and then dismantling the motor and pump from the base frame. Carriage & shifting of dismantled motor and pump of LIS Rathana on head load to roadside using manual labour and then to workshop by carriage vehicle. Repairs to 5 cusec x 10 meter head pump by way of dismantling spiral casing pump of pumping unit no II at workshop by completely draining of old oil from the bearing housing and extraction of all worn out/damaged parts, i.e. pump shaft, impeller, bearings, sleeve, bush, check nut, nuts & bolts, gland plate, gland studs. Repairs to pump shaft by metal filling through welding of worn out portions and turning and finishing to original size with outer threading as per the size of check nuts. Providing and fitting of new impeller and finishing to original size. Providing and fitting of two number new bearings number 6408 and one number thrust bearing number 51310, neck ring, shaft protection sleeve, check nut, nuts & bolts, fabrication of new gland plate with providing and fitting of 2 no’s new gland studs. Completely cleaning of bearing housing to remove dust and metal residue. Reassembling all parts of pump with proper greasing & filling of pump bearing housing with fresh M-oil upto the required level. Assembling of pump with motor and connecting with suction and delivery pipes. Providing of new nuts and bolts with rubber gaskets. Providing and fitting of graphite packing. Repairs to 25 hp motor of pumping unit no II by extracting out old damaged winding manually and cleaning of stator slots. Complete rewinding of the stator by using standard copper wire of requisite gauge. Varnishing after rewinding of stator. Repair to rotor shaft by way of welding, turning and finishing to required size. Providing and fitting of new bearings-2 no’s on driving and non driving end, bearing plates- 2 no’s, end terminals, nuts and bolts. Repairs to coupling pulley of pumping unit no II by way of rebuilding of holes on pulley by filling of metal with welding, drilling and boring of holes as per the required size of coupling bolts. Fabrication of bush and fitment on pulley to make the size compatible with pump and motor shaft. Providing and fitting of 8 no’s. new coupling nuts & bolts, rubber bushes, key way. Repair to 300 mm diameter foot valve of pumping unit no II by way of dismantling all moving and fixed parts. Cleaning of all internal parts to remove silt and rust. Fabrication of new foot valve plate as per size, new leather washer, hinge pin, new nuts & bolts. The job includes fabrication of strainer to stop entry of unwanted material and fitting it with foot valve. Shifting back and installation after carrying out repairs of motor & pump to site. Testing of pumping unit on no load and full load. The job includes the cost of materials, labour charges installation and testing at site. Complete job. Repairs to 63 kva voltage stabilizer by way of dismantling of all components of balanced type voltage stabilizer such as coils, rotary switch. Rewinding of 03 no.’s damaged coils with standard gauge wire and proper insulation & tapping. Varnishing of coils with standard quality varnish and allowing it to dry. Heating of repaired coils in oven to get required megger value. Replacing of 3 pole rotary switch. Making all the internal connections and checking its continuity. Reassembling the voltage stabilizer at workshop. Filtration of existing transformer oil and toping up with 75 liters of fresh transformer oil after cleaning the tank to remove carbon deposits. Installation of the voltage stabilizer by connecting incoming and outgoing power cables. Testing of voltage stabilizer on no load and full load conditions. Job includes cost of material including rebate on old copper scrap/ material, labour charges, hire charges of tools and tackles, installation and testing charges at site.

Rebate on Old Parts

Repairs to electric sub station and repairs to 350 mm non return valve installed at Lift irrigation station Seelam

Repair to 350 mm reflux valve diameter by way of dismantling reflux valve from delivery side of unit no. III installed at lift irrigation station Seelam. The job involves extraction of broken flap of reflux valve. Providing and fitting of new flap with locking sheet. Replacement of hinge and hinge pin of the valve. Properly checking inner body of non-return valve for any cavitation voids or corrosion repairing of the same. Fitting of the valve on the delivery line with providing and fitting of new nuts and bolts along with rubber sheet. Complete job includes cost of material, labour charges, welding charges. Repairs to 100 KVA electric transformer installed at lift irrigation station Seelam by way insolating of transformer from 11 KV HT supply, removing of HT cables and LT cables from the transformer. Lifting of transformer from installed position using long boom crane and carriage of transformer to road side from the lift irrigation station Shifting of transformer to workshop for repairs. Completely dismantling the transformer after removing the top cover of transformer and extracting out the damaged LV and HV coils from the oil tank. Complete rewinding of HV coils and reconditioning of LV coils using superior quality insulating material. Providing and fitting of 4 no’s LV bushes, 3 no’s HV bushes, LV bush rod 4 no’s, HV bush rod 3 no’s, gasket set and nuts and bolts. Repairs to the core of transformer by replacing the flashed core material. Heating of assembled coils in oven for proper hot air process and to get required meager value. Repair to oil tank by welding to make the oil tank leak proof and air tight. Lowering the assembled coils in oil tank. Filtering of existing transformer oil and topping up with 100 liters of fresh transformer oil. Complete job includes cost of material, labour charges, cost of oil, welding charges.

Rebate on Old Parts

Rishabh Electricals and Mechanical Works

M/S NARESH MECHANICAL AND ELECTRICAL ENGINEERING WORKS

GANPATI ELECTRICAL AND MECHANICAL WORKS