Repair and servicing of valves gates at LIS Garnai

Repair to 400mm dia reflux valve installed on 400mm dia rising main at LIS Garnai in district Udhampur by way of unfastening of rusted/damaged studs/nuts and bolts, opening of bonnet cover, extraction of damaged disk assembly. Then checking for any cracks, removing of foreign material deposited inside the body. Providing, fabrication and fitting of complete disc assembly and then re-fitting of the bonnet cover by providing and fitting of new rubber joint, studs, nuts, bolts and washers as per site requirement and testing it. Servicing of 250mm dia reflux valves of Unit-I, Unit-II and Unit-III at LIS Garnai by way of unfastening of rusted/damaged studs/nuts and bolts, opening of bonnet covers, checking smooth operation of disk assemblies. Then checking for any cracks, removing of foreign material deposited inside the bodies, cleaning and greasing of the valves. Providing, fabrication and fitting of complete disc assembly to reflux valve of Unit-III. Re-fitting of the bonnet cover of all the three reflux valves by providing and fitting of new rubber joints, studs, nuts, bolts and washers as per site requirement and testing them. Servicing of 250mm dia foot valves of Unit-I, Unit-II and 200mm dia foot valve of Unit-III at LIS Garnai by way of dismantling foot valves from suction pipes in sump tank. Dragging out from sump with the help of manual labour using tools and tackles. Dismantling of foot valves, cleaning and replacing the leather sheets cut to size along with rubber sheet for flanges with p/f of new nuts and bolts along with washers. Re-assembling and fitting the same to the respective suction pipes in sump tank with the help of manual labour using required tools/tackles and testing them. Repair to 250mm Dia sluice valve of unit-III at LIS Garnai by way of taking out of sluice valve from the delivery line after unscrewing/cutting the rusted nuts and bolts. Shifting of the damaged stem rod disc assembly and gland bracket to workshop. Providing, fabrication of new stem rod along with nut and gland bracket as per sample, shifting them back to site. Installation of the stem rod disc assembly with nut and gland bracket to the sluice valve. Re-assembling and fitting the same to delivery pipe by way of p/f of new rubber sheet, nuts, bolts and washers as per site requirement. Job also includes servicing / repair / painting of the inlet & exit regulatory gates installed on the intake sump at LIS Garnai. Detaching the regulatory gates from their guides, extraction of gates outside the frames and associated brackets / fixtures (if any) without causing any damage to the surrounding concrete structure or embedded parts, using manual labour, tools & tackles. Dismantling the winch machines, worm gear assemblies and stem rods. Cleaning the gates, stem rods and housing parts using wire brushes to scrape off mud, dirt, old paint, biological growth and scale build up. Washing all metal surfaces using industrial chemical cleanser & degreaser to remove grease, oils and rust stains. Rinsing thoroughly with high pressure water and letting the components dry completely. Inspecting the worm gear, winch and stem rod for replacement of old worn-out small items by way of providing / fitting of seals, gaskets, washers, keys, gland packing, nuts and bolts of matching specifications. Making disassembled gates and hoist housings, guide channels dust and moisture free after removing of residual rust / old paint by using sandpaper or a mechanical grinder. Applying an even coat of anti-corrosive metal primer to all exposed metal surfaces. Drying completely and then applying two coats of enamel paint. Reassembling and reconnecting the stem rod, the worm gear and the winch machine. Lubricating / greasing the worm gear, bearings, winch lifting mechanism & guide channels to ensure smooth operation. Fitting the entire regulatory gate assembly back into the sump track / channels at the original position ensuring smooth leak free operation. Performing a dry run to ensure the gate opens and closes smoothly. Providing of gland packing-3kg and grease-2kg for smooth operation of pumping units installed Complete job involves cost of material, labour charges for skilled/unskilled labour, transportation charges, headload charges, hire charges of tools/tackles required for the job inclusive of all taxes as applicable and rebate on old Parts. Complete Job