Repairs of 120 HP VT pump of unit-IV along with its other allied works at LIS Katal Batal and Repairs schedule maintenance to gates installed at various location and other works.

Repairs of 120 HP VT pump of unit-IV along with its other allied works at LIS Katal Batal

Disconnecting all the electrical connections from slip ring VT motor of 120 HP and unscrewing nuts and bolts to separate the ratchet assembly from motor lifting the motor and rotor assembly with the help of existing chain pulley and gantry arrangement and dragging/shifting to side and then decoupling the flywheel of the coupling set from the top shaft of the suction line by way of unscrewing the lock nut and taking out the locking key and then lifting the flywheel with the help of manual labour. Dismantling the ratchet assembly from the discharge head by way of unscrewing the existing nuts and bolts and then lifting the ratchet assembly with the help of existing chain pulley arrangement and keeping it aside. Dismantling the discharge head from suction, delivery line and base frame and lifting/extracting it out after unscrewing the required nuts and bolts to keep it aside. Extracting the existing column assembly after unscrewing the nuts and bolts, taking out spider guide, unscrewing the line shafts from socket joints, and extracting the damaged sleeves with the help of skilled and semiskilled labour using other required tools and tackles and existing chain pulley arrangement. Extracting all the three Nos suction pipes in similar manner and then then keeping aside. Finally extracting out the damaged 10 cusec 02 stage VT pump, head load carriage of pump, line shafts, sleeves, stuffing box and sockets to road side up to loading point with the help of skilled manual labour and then loading into a mechanical transport for carrying to work shop for repairs with the help of crane/tools, tackles using manual labour. Complete job includes cost of labour, carriage charges and hire charges of tools and tackles. Repair to stuffing box by providing and fitting of new bronze bush as per sample to required size of precision after re metalling, finishing and drilling holes and making internal threads on stuffing box as per requirement. Repair to top shaft by way of rebuilding with machine able SS electrode at worn out portions and then threading and making key way of required size. Providing and fitting of new CI spider guide 02 Nos. along with rubber bush as per sample. Fabrication/ providing and fitting of 04 Nos bronze body bushes. Repairs to 02Nos line shaft by way of welding, turning and making threads as per sample. Providing and fitting of 02Nos sleeves by making internal threads of required size. P/F of oil packing sheet for flanges 05 Nos cut to required size. The job includes fitting of the pump using new nuts and bolts/ studs of required sizes. Complete job includes cost of material and labour charges at workshop. Loading the repaired pump along with line shafts and other allied material into the mechanical transport using crane/tools, tackles with the help of manual labour at work shop. Unloading the same at road site at LIS Katal Batal using crane/tools, tackles with the help of manual labour. Carriage to the site of installation through head load using tools and tackles with the help of skilled labour. Lowering down the pump into the sump by connecting the line shaft by P/F socket 02 Nos and suction pipes by P/F of new nuts, bolts and rubber sheet joint of required sizes one by one after ensuring proper alignment. Fitting of discharge head and connecting it to delivery line by P/F rubber sheet joint and required nuts, bolts of appropriate size Mounting the motor on the base frame after assembling the ratchet and filling of fresh M. oil 05 ltrs approximately after draining the old contaminated oil, coupling the motor with line shaft by p/f of new rubber bush (12 nos) of appropriate size. P/F of gland packing, grease, and rubber sheet joint cut to required size. Providing and fitting of new carbon bushes- 6 no., new brass nuts, bolts with washer 3 Nos., electrical terminal plate, P/F of 3Nos copper thimbles of appropriate rating/size after cutting the damaged/ burnt end and then dressing of 70mm2 multi stand copper cable ends and crimping them using crimping tool and insulating it properly of rotor assembly. P/F 6Nos. copper thimbles of appropriate rating along with required nuts and bolts and crimping them and insulating it properly of slip ring motor. Complete job includes cost of material, labour charges, and hire charges of tools and tackles used. The complete job includes cost of material, carriage, fitment charge and testing on full load at site. Dismantling the 120 HP oil immersed star delta starter from installed position of pumping unit no. IV after disconnecting all electrical connections from input and output side. Loading in transport for carriage to workshop for repair. Repair to starter by way of extracting out the damaged copper contact points both moving and fixed, thimbles, no volt coil, tripping system, overload relay and replacing the same with new ones, minor repairs to operating mechanism. Providing/filling of 10 liters transformer oil for topping of starter after demoisturing the existing oil. Back carriage of the starters to LIS. Installation of starter by proving and fitting new nuts and bolts required commissioning and test. Giving all the electric connection by p/f new thimbles of appropriating rating/size. The job includes cost of material, labour charges, installation and testing on full load at site. The job also involve the plugging of leakage in manifold by way of cutting the worn out pipe of 14” dia from the top to access the inner welding joint at its end point and then welding the end joint from inner side to plug the leakage all around its ends by providing a wider welding layer around the pipe ends. Then welding back the required cut plate on the top of the pipe Also plugging the other weaker joint on the delivery side of all the pumping machinery by way of welding with super bond electrode. The complete job include cost of material carriage of welding and gas cutting set (to and fro), labour charge and testing complete at LIS Katal Batal. Repairs to 200 KVA manually operated voltage stabilizer by way of removing its top cover lifting the coil assembly to access for extraction of damaged rotary switch with the help of chain pulley block, tripod stand and manual labour. P/F of 01No. of new manually operated rotary switch along with plate, new set of brass bush rods for all individual phases on input side. Lowering of the coils inside the casing. Assembling the top cover by p/f of new nuts and bolts of required size along with gasket. P/F of new aluminum bus bar 03 Nos, after dismantling/ extracting the old worn out bus bar, fuses 03 Nos and voltmeter 01 No.by replacing the old with the new one. The job involves topping up of deficit quantity of T-Oil approx. 60 ltrs after heating it to make moisture free. Connecting all the incoming and outgoing electrical connection by p/f new thimbles of appropriate rating /size after cutting and dressing the burnt ends of cables. Also disconnecting all the connection of main supply cable from the LT pole and LT terminal of transformer then re fixing/ connecting them after cleaning the carbon deposited to counter the voltage drop during starts of pumping machinery Complete job includes cost of material fitment and labour charge at LIS Katal Batal. Note:- The tenderers are requested to visit the site and quote the rate as per site conditions. Any modifications/ alterations of the job, absolutely necessary if required at the time of execution may be done as per actual site conditions.

Rebate on Old Parts

Repairs/schedule maintenance to gates installed at various location and other works.

Repair of the gate (5’.9” X 2’6”) at Katal Batal by way of dismantling the winch machine after cutting/unscrewing the old rusted nuts and bolts and then extracting out the worn out gear mechanism along with bearing and stem rod. Loading in the load carrier for shifting to workshop for repair. Fabrication of worm gear and main gear as per sample and tempering them to withstand required load. Re metaling the worn out portion of the gear mechanism housing and grinding it to finish up to required size. Straightening the stem rod and finishing its thread by machining to standard required size. Assembling the winch machine by providing and fitting of 02 No bearing as per sample after greasing the gear mechanism. Loading back the winch machine in load carrier for shifting to site of installation. Fitting the winch machine on the supporting channel and then connecting the stem rod to the gate leaf structure after ensuring the gravity of the gate leaf. Checking for its up and down movement and smooth functioning of winch machine on load at site. Complete removal of old paint by sand paper and painting of both winch machine and gate with one coat of metal primer and two coats of paint andgreasing/ oiling of sliding channel for smooth movement. Complete job includes cost of material, carriage, transportation(to &fro), loading/unloading, hire charges of tools and tackles manual labour and fitment charge at LIS Katal Batal. Repair of the gate (4’10” X 2’6”) at Katal Batal by way of extraction of gate outside the frame using necessary tools and tackles & manual labour / crane after dismantling of winch machine. Strengthening of leaf structure at site by way of welding the worn out joints using good quality electrodes. Replacement of winch machine of 02 ton capacity along with base plate, rain pipe and operating handle. Providing /fitting of stem rod by way of fabrication and turning, threading and finishing to size as per requirement. Lowering the gate leaf structure into the sliding channel after cleaning and creasing the sliding channel. Attaching the stem rod to the gate leaf structure and then fitting the winch machine on the supporting channel after ensuring gravity of leaf structure. Complete removal of old paint by sand paper and painting of both winch machine and gate with one coat of metal primer and two coats of paint. The job includes cost of material, hire charges of tools and tackles, fitment/labour charge, and testing complete at site. Repair to the Escape gate near BSF main gate of size 8’6”:x6’6” by way of dismantling of manually operated winch machine of 5 ton capacity by unscrewing / cutting of rusted nuts and bolts, extracting out the stem rod, straightening of stem rodcleaning of gear mechanism of winch machine with appropriate cleaning agent. Greasing the movable parts and gear system of winch machine.Complete painting with one coat of anticorrosive paint. Assembling back the winch machine by p/f of new nuts and bolt of required size along with stem rod and applying the grease on the stem rod. Cleaning the side grooves and checking the up and down movement of the gate. Complete job including cost of material, hire charges of tools & tackles and charges on a/c of skilled labour required for execution of work. Repair of the gate2'.6"×3'.0"at Giddar Galian by way of extraction of gate outside the frame using necessary tools and tackles & manual labour / crane after dismantling of winch machine. Strengthening of leaf structure at site by way of welding the worn out joints using good quality electrodes. Lowering the gate leaf structure into the sliding channel after cleaning and creasing the sliding grooves. Attaching the stem rod to the gate leaf structure and then fitting the winch machine on the hoisting channel after greasing and ensuring gravity of leaf structure. Complete removal of old paint by sand paper and painting of both winch machine and gate with one coat of metal primer and two coats of paint. The job includes cost of material, hire charges of tools and tackles, fitment/labour charge, and testing complete at site. Repair to gate at Gidder Gallianof size 2'.6"×4'.0" by way of dismantling of manually operated winch machine of 2 ton capacity by unscrewing / cutting of rusted nuts and bolts, extracting out the stem rod, straightening of stem rodcleaning of gear mechanism of winch machine with appropriate cleaning agent. Greasing the movable parts and gear system of winch machine.Complete painting with one coat of anticorrosive paint. Assembling back the winch machine by p/f of new nuts and bolt of required size along with stem rod and applying the grease on the stem rod. Cleaning the side grooves and checking the up and down movement of the gate. Complete job including cost of material, hire charges of tools & tackles and charges on a/c of skilled labour required for execution of work. Gate of Ismailpur Distributary(4’0”X 2’3’’) A Dismantling of winch machine from the supporting channel then extracting out the gears, bearingwith the help of manual labour using tools and tackles, chain pulley block after cleaning area around the gate leaf., straightening of stem rod, fixing of stem rod on winch machine .complete greasing of winch machine Complete painting of gate structure and the winch machine by way of Providing two coats of superior quality paint after applying one coat of red oxide primer, complete job includes cost of material, transportation charge, labour charges and testing for its smooth operation at site. Gate of Ismailpur Distributary(5’0”x 2’3”)B Repair to gate by way of dismantling of manually operated winch machine by unscrewing / cutting of rusted nuts and bolts, extracting out the stem rod, straightening of stem rod cleaning of gear mechanism of winch machine with appropriate cleaning agent. Greasing the movable parts and gear system of winch machine. Complete painting with one coat of anticorrosive paint. Assembling back the winch machine by p/f of new nuts and bolt of required size along with stem rod and applying the grease on the stem rod. Cleaning the side grooves and checking the up and down movement of the gate. Complete job including cost of material, hire charges of tools & tackles and charges on a/c of skilled labour required for execution of work. Gate at Nandpur Ditch (3’0”X3’6”) Repair to gate by way of dismantling of manually operated winch machineby unscrewing / cutting of rusted nuts and bolts, extracting out the stem rod, straightening of stem rod cleaning of gear mechanism of winch machine with appropriate cleaning agent. Greasing the movable parts and gear system of winch machine. Complete painting with one coat of anticorrosive paint. Assembling back the winch machine by p/f of new nuts and bolt of required size along with stem rod and applying the grease on the stem rod. Cleaning the side grooves and checking the up and down movement of the gate. Complete job including cost of material, hire charges of tools & tackles and charges on a/c of skilled labour required for execution of work.

Rebate on Old Parts

AADISHWAR ELECTRICAL AND MECHANICAL WORKS

PERFECT ELECTRICAL WORKS

Vaibhav Engineers and Technocrates

PERFECT ELECTRICAL WORKS

M/S RAGHUNATH MECHANICAL AND ELECTRICAL ENGINEERING WORKS