NIT No-11 EE (SDW) II/ (21-22) Item No.05

Renovation/Strengthening of Final Settling Tank No. 03 of 37 MGD STP Okhla by carrying out the following works:- Isolating the clarifier from upper and down streams of its flow and dewatering the water from the FST with the help of submersible, clean the site manually for execution the work including providing of gunny bags if required.

Making temporary platform around the central post of FST for safe working of staff on central cage as per requirement.

Dismantling/Cutting of all worn out structure i/c scrapper, scrapper arms, bridge, chequered sheet, damaged central drum, angle iron structure and nut-bolts/rivets with the help of gas cutter, manpower and lowering lifting, tools & tackles as per requirement.

Dismantling the motor and primary gear box, central gear box and other mechanical fixtures from the top of central mechanism with the help of gas cutter/tools & tackles and shifting the same to workable place.

Renovation of primary small gear box Providing set of sprocket wheel & pinion, fabricated as per sample in terms of shape, size & MOC.

Providing/Fixing the bearings as per sample in the gear box. Bearings Nos. 7206 = 2 Nos. and 30212 = 2 Nos. Make:- SKF/FAG/NSK

Providing/Fixing damaged M.S. Angle size 50x50x6mm, 65x65x8mm, 75x75x8mm etc. M.S. sheet for joints as per sample in terms of shape, size & MOC.

Proving/Fixing the bottom scrappers made out from 6mm thick sheet as per sample in terms of shape, size and metallurgy.

Providing/Fixing of rubber squeeze of 100% synthetic rubber. Make:- Jyoti/National

Providing/Fixing of damaged M.S. Sheet having thickness 6mm for central drum with workmanship charges.

Alignment of complete structure after the assembly and fixing the above material i/c all nut bolts and fasteners as per requirement.

Providing/Fixing the PVC sheet/ISO resin in front of the v-notch of the FST made out from I.S.O. resin 5/6mm thick with nut and bolts and clamps on RCC wall of FST as required.

Providing/fixing 300mm (or suitable size) Non-Rising Sluice Valve confirming IS:14846 PN 1.6, Body, Dome, Wedge – CI IS: 210, Gr. FG260, SS spindle, Spindle Nut of Bronze IS:318, Flanges drilled as per IS:1538 complete with Gland Packing, fasteners etc. Make: Kirloskar/IVC/VAG and any other DJB approved make.

Painting the complete structure by carrying out following works: - Providing the metal primer red oxide (in 20 Litres. Packing)

Providing the synthetic enamel paint of required colours as per site requirement in 20 Litres. Packing. Make:- Asian/Nerolec/Berger

Providing of thinner (General propose) for diluting the paint (in 20 Litres. Packing)

Painting the complete structure with one coat of epoxy primer and two coat of enamelled paint.

Testing & Commissioning the complete FST including filling of lubricating oil approx. 160 litres after completion in all respect on No Load/Full Load.

Darshan Engineering Works