NIT No-18 EE (SDW) II/ (21-22) Item No. 04

Renovation/Strengthening of Grit removal unit No. 1 with other allied works at 37(22) MGD STP Okhla by carrying out following works including all the required works, materials, arrangements tools & tackles workmanship, safety arrangements & equipments as per NHRC guidelines etc. and as per site requirement, re-modelling all the damages up to standard if occurred any complete in all respect satisfactorily. The job is also include that job/item also which are necessary to make the equipments/site operational but not taken into the estimate. Repairing of Grit Chamber Unit No.1 at 37 MGD STP Okhla by carrying out following the works: Isolating the Grit Chamber from the hydraulic system (Inflow and outflow sides) by operating Sluice Gates and providing gunny bags to prevent the access of liquid to the unit from the gates. Draining out the stagnated effluent de-sludging & cleaning Grit Chamber with the help of sump pumps and D.G. Set etc. so as to make the conditions at site, workable.

Dismantling the electric motors, Primary reduction Gear Box and central Gear Box by cutting of Nut-Bolts and Fasteners and shifting these to a safe workable place with the help of lowering/ lifting tools and tackles.

Repairing of both scrappers bridge and scrappers by carrying out following works: - Dismantling of vertical shaft, bottom chord and worn out scrapper arms structure with arms with the help of Gas cutter, all tools & tackle.

Fab./ Providing of complete set of scrappers as per existing size with rubber squeezers & M.S. flat.

Providing of M.S. Angle Iron as per existing size for scrappers Arms.

Providing of M.S nuts & bolts of different sizes.

Labour charges for fixing of above M.S structure for scrapper arms, bottom scrappers along with squeezers i/c making hole for tightening of nuts & bolts i/c all welding & cutting works. i/c fixing of main vertical shaft with casing with proper alignment.

Repairing of central gear box by carrying out following works: - Providing set of Central Gear, Pinion, & Set of Bushes fabricated as per sample in terms of shape, size, MOC and machining etc. in ready to use condition.

Re-fixing of Central Gear Box after resembling of all above parts i/c fixing of oil seal and filling of lubricating oil.

Painting of complete structure for Grit chamber by carrying out following works: - Providing Red oxide metal primer in 20 kg packing. Make: - Berger/Nerolac/Asian

Providing synthetic enamel paint in black color in 20 Ltrs. Packing. Make:- Berger/ Nerolac/Asian

Painting of the complete structure after removing of rust with brush with one coat of primer, two coat of enamel paint i/c auxiliary material like old dhoti, emery paper, brushes etc. `

Testing and commissioning of Detroiter system after general servicing of starter, making electric connection and testing of the same on load at site. The work includes contingency charges, providing of heavy labour including any risk and cost of the labour etc.

Providing and fixing of Screw conveyor with following works:-Fabrication and supply of screw conveyor made out of 200 mm dia M.S. pipe thickness 6 mm length 9 Mtr. job i/c welding of screw plate 5 mm thick work involve the screw plate is 65 mm welding by M.S welding rod. The screw conveyor having 2 Nos. M.S. Blank flanges on both side with 25 mm thick.

Providing of plumber block with bearing.

Fabrication and fixing of half round 5 mm thick M.S. casing on the screw conveyor chamber the length of M.S. casing 9 Mtr. The casing is proper fixed by electric welding & civil works.

Dismantling of Electric motor, Reduction gear box by cutting of Nut Bolts with the help of Gas cutter and shifting these to a safe place. With the help of lowering/ lifting tools & tackles.

Dismantling of screw conveyor along with all accessories by cutting of old & rusted fasteners with the help of gas cutter and shifting the same on the ground level with the help of lowering/ lifting tools & tackles.

Fabrication/Providing of Bearing Housing as per sample in terms of shape, size and MOC i/c all machining work.

Providing of S.S Bush as per sample in terms of shape, size & MOC i/c all machining work.

Assembling and fitting the complete screw conveyor system with all above material with the help of all lowering/ lifting tools & tackles, making proper alignment i/c all minor civil works as required at site.

Renovation of reduction gear box by carrying out following works: - Dissembling of Reduction Gear Box.

Providing of worm gear, pinion, bushes fabricated as per sample in respect of size, finishing & MOC.

Providing of sprocket chain, wheel as per sample fabricated in respect of size, finishing & MOC.

Re-fixing of reduction gear box after resembling of all above parts and alignment with motor. Fixing of sprocket chain filling oil.

Painting of complete screw conveyer structure by carrying out following works: - Providing Red oxide metal primer in 20 kg packing. Make: - Berger/Nerolac/Asian.

Providing synthetic enamel paint in black color in 20 Ltrs. Packing. Make: - Berger/Nerolac/Asian.

Painting of the complete structure after removing of rust with brush with one coat of primer, two coat of enamel paint i/c auxiliary material like old dhoti, emery paper, brushes etc.

Testing/ commissioning of complete Screw conveyor system after general servicing of starter, motor, making electric connection and testing of the same on load at site. The work includes contingency charges, providing of heavy labour including any risk and cost of the labour etc.

M/S ARYAN TRADERS AND ENGINEERS