NIT No-04 EE (SDW) II/ (23-24) Item No. 15

Repair/Overhauling of primary Settling Tank No.-2 at 16 MGD, STP, Okhla by carrying out the following works:- including All the required works, materials, arrangements, tools & tackles, workmanship, safety equipments as per NHRC\NGT\ DPCC etc guidelines and as per site requirement, remodeling all the damages up to standard if occurred any complete in all respect as per requirement satisfactorily.

Isolating the PST by closing sluice gate and providing gunny bags to ensure no flow in the PST. Dewatering the stagnant water and cleaning the PST with the help of submersible pumps and D.G. sets De-Sludging and cleaning the P.S.T. manually for execution the work.

Dismantling of central primary gear drive unit after disconnection from main electric supply. Taking out motor after mechanical dismantling of sprocket chain. Removing of gear box from the base and shifting equipments in safe place.

Dismantling of main gear driving unit after cutting rusted fasteners by gas welding set. Dismantling of internal gear heavy unit of turn table, other gears and pinion, dismantling of bearing. Taking out vertical shaft. This includes lifting arrangement by mechanical means.

Making temporary plate form as safety measures on the sides of the central cage as per site requirement of drive head.

Providing of internal gear, pinion and set of bushes fabricated as per sample in respect of size, finishing & MOC for main Gear Driving Unit.

Providing of Lubricating oil 320

Re-assembling of main gear box complete mechanism like gear, Pinion, bearings, i/c fixing of oil seals, gaskets and filling of lubricating oil etc.

Repairing of Primary Reduction Gear Box by carrying out following works: - Dissembling of primary Reduction Gear Box.

Providing of worm Gear, Pinion, Bushes, Fabricated as per manufacturer standard in respect of size, finishing & MOC.

Providing of sprocket chain, as per sample.

Re-fixing of primary reduction gear box after resembling the all above parts and alignment with motor. Fixing of sprocket chain, filling of oil. The work includes servicing of starter, motor as per site requirement.

Repairing/ Strengthening of Scrappers arms and scrappers, by carrying out following works: - Dismantling of rusted/corroded bottom scrappers along with arms with the help of Gas Cutter, all tools & tackles.

Fab./Providing of M.S. Angle Iron of sizes 90mm x 90mm x 10mm and in a length of 7” for scrappers Arms.

Fab./Providing of Bottom Scrappers of sizes appx. 2700 x 200 x 8 mm with 5mm sheet along with Rubber Squeezers & M.S. Flat.

Providing of M.S Nut Bolts of different sizes.

Labour charges for fixing the above M.S Angle Iron for scrapper Arms, Bottom scrappers along with squeezers i/c making hole for tightening of Nut Bolts i/c all welding & cutting work.

Dismantling of worn out V-notch of rusted not bolts with the help of gas cutter, all tools & tackles. .

Providing the fibber sheet for v notch approx. 50 meter as per requirement

Providing the S.S nut bolts as per sample for fixing the ‘V’ notch.

Fixing the V-notch in PST after drilling in RCC with power hammer including all civil work with all tools and tackles.

Providing of Tie Rod with support.

Fixing of above Tie Rod on both side of central Drum for Holding the scrapper Bridge with Adjustment assembly.

Fab./Providing of the scum arm made out from MS channel of size 150 x 75mm approx 15 meter and MS strip of sizes 250mm x 8mm in a length of 21.5 mtrs. with rubber squeezer as per sample.

Fixing of above scum Arm with all welding work and with all tools & tackles.

Repairing of 300 mm dia. sluice valve installed at the outlet sludge. Providing of S.S. spindle with Nut fabricated as per sample.

Providing of C.I Gland Plate with studs fabricated as per sample.

Repairing of C.I sliding weight i/c fixing of G.M Ring at Both sides.

Providing of MS Nuts & Bolts of 5/8” x 4”

Reassembling the sluice valve with above material.

Painting of the complete structure by carrying out following works: - Providing of Red oxide metal primer in 20 kg packing. Make: - Asian/Nerolec/Burger.

Providing of synthetic Enamel paint in Black/Red Colour in 20 Ltrs. Make: - Asian/Nerolec/Burger

Painting of the complete structure after removing of rust with brush with one coat of primer & two coat of enamel paint i/c petty items.

Testing and commissioning the complete PST after completion in all respect on no load / full load.

Gupta Brothers