NIT No-04 EE (SDW) II/ (23-24) Item No. 11

Renovation/Strengthening of Rack Classifier & Detroiter No. 1 at 12 MGD STP Okhla by carrying out following the works:- For Detroiter Unit:- Isolating the classifier (inflow and out flow sides) by operating sluice gates and providing gunny bags to prevent the leakage from the gates draining out all the sludge and sewage water with the help of pumps so as to make the conditions at site, workable.

Dismantling the electric motor, primary reduction gear box & central gear box by opening/cutting of nut bolts and fasteners and shifting these to a safe workable place with the help of lowering/ lifting tools & tackles.

Dismantling the scrapper arm structures with the help of gas cutter/man power and taking these out with the help of lowering & lifting tools & tackles.

Renovation & strengthening of scrapper arm by replacing the worn out angle iron and channel after cutting the damaged portion and fixing the new structure.

Providing the complete set of bottom scrappers with rubber squeezers, fabricated as per manufacture standard and strictly as per sample in terms of shape, size & MOC.

Providing set of central gear and pinion, fabricated as per sample in terms of shape, size MOC and machining etc. in ready to us conditions.

Renovation of primary reduction gear drive system with replacement of set of sprockets, fabricated as per sample in terms of sprockets, fabricated as per sample in terms of shape, size, MOC & machining. providing drive chain as per sample i/e servicing & overhauling of primary gear box by stripping and reassembling after replacing of oil seal and gear oil etc.

Assembling & Setting the complete system, making proper alignment and balancing etc. as required at site including cost of nut bolts, washer and packing with the necessary civil work required at site.

Dismantling of induction motor. The work also includes servicing with Dr. Back varnish and baking, replacement of connection plate and box. Assembling the complete motor and put on the foundation, tightening of the nut bolts.

Testing & Commissioning of Detroiter system after general servicing of starter, making electric connection & 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.

Painting the complete structure (Detroiter Unit) by carrying out the following works:- Painting of the complete structure with one coat metal primer red oxide and two or more coat synthetic enamel paint by using auxiliary material like old dhoti, emery paper, brushes etc.

For Rake Classifier:- Dismantling of rake classifier by cutting of old & rusted fasteners with the help of gas cutter and shifting the same on the ground level with the help of manual labour/mobile crane.

Providing complete set of GM bushes, pins, shaft, cover plates rings, counter weight seating with outer weight and studs, plumber blocks complete etc. for each arm of rack classifier as per sample

Strengthening of push rods and renovation of structure by cutting /removing of the damaged portion & patch work by adding the new one.

Repairing of rake gear system by replacing worm gear, fabricated as per manufacture standard in terms of shape, size, MOC and finishing etc.

Providing/fixing set of bottom scrappers with Neoprene rubber squeezers with guide channel made out as per manufacture standard terms of shape, size& MOC i/e welding work/nut-bolts.

Assembling of each arms by assembling the scrapper arm, pin bushes, shaft, cover plates , rings etc. On ground level.

Erections the complete structures at site after assemble on the ground level and erection with the help of mobile crane.

Dismantling of induction motor. The work also includes servicing with Dr. Back varnish and baking, replacement of connection plate and box. Assembling the complete motor and put on the foundation, tightening of the nut bolts including replacement of new coupling.

Alignment of the complete structure with required civil works.

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

Painting the complete structure (Rake Classifier) by carrying out the following works:- Painting of the complete structure with one coat metal primer red oxide and two or more coat synthetic enamel paint by using auxiliary material like old dhoti, emery paper, brushes etc.

V.K. ENTERPRISES