NIT No. 07 (20-21) Item No. 1

PART A: - Repairing of Grit Separator No.1 & 2 :- Completely isolation and cleaning of grit chambers by closing of sluice gates, providing of gunny bags etc. to make the site workable with water pressure by submersible pump set and taking all safety precautions as per NHRC guidelines.

Dismantling of gear box, motor, chain sprocket, chain after cutting of all rusted nut bolts by gas cutter and other required tools & tackles as per site requirement.

Removing the main shaft from the M.S Structure for dismantling of "C" channel with the help of gas cutter and manual labour etc.

Repairing of moving MS structure by repairing/replacing of old worn out C channel (4 mtr approx,140 X 60 X 10 mm), MS Arms (02 Nos. in each grit separator) made of angle (65 X 65 X 5 mm) and angle (50X50X3 mm), MS scrappers (8 Nos. in each grit separator) in L shape made of MS sheet (300 mm X 1000 mm X 8 mm) i/c synthetic rubber squeezers with the help of gas cutter, welding machine, other tools & tackles as per site requirement.

Providing & fixing of adjusting studs (150 mm X 20 mm) and nuts with hinged pin for adjustment and balancing of both arm to make the complete balancing of system.

Replacement of sprocket of 1" pitch as per sample.

Replacement of chain of 1" pitch as per sample.

Supply of nut bolts of various sizes with washer.

Repairing of gear box by completely dismantling and removing of all inner parts. Repairing of worm gear by machining and replacement of oil seal, gasket and bearing lock.

Re-fixing of Complete system i/c gear box, motor, chain sprocket, chain with proper alignment and balancing by nut bolts and gas cutter and other required tools & tackles as per site.

Fabrication & Fixing of canopy on the motor and gear box for safety.

Repairing of moderation system of water flow by Replacement of 14 Nos. of MS plates (0.5 m X 1 m x 5 mm) with MS pipe (75 mm dia, 2 mm thick and 1.15 mtr long) the job includes cutting / removing of old rusted MS pipe/plates and p/f of MS "U" clamp and handles as per sample.

Epoxy Painting at least 2 coats or more with Primer.

Testing and commissioning of complete grit chamber on no load & on full load.

PART B: - Repairing of Rack Classifier No.2 :- Dismantling and taking out of rack classifier by dismantling of gear box, motor, bearing bracket, spine shaft, all connecting rod with pins and other mechanical parts after cutting of all rusted nut bolts by gas cutter and removing the all parts on the ground for repairing purpose with the help of manual labour with handling equipments and other required tools & tackles as per site requirement.

Replacement of MS bottom scrapper of size 75x325x6 mm as per site requirement. The job i/c dismantling of old damaged scrapper by the help of gas cutter from the classifier.

Supply & fixing of neoprene rubber as squeezers.

Repairing of existing connecting rod by machining work. Making bore as per bush size for fixing of GM bush as per job requirement.

Providing & Fixing of GM bush including casting, machining and finishing as per sample.

Repairing and strengthening of structure of rack classifier for making the full strength with the help of C- channel (120x65x8 mm) the job includes cutting and removing of old worn-out plate from the structure with the help of gas cutter, welding set as per site requirement.

Replacement of bearing with bracket as per sample.

Repairing of center mechanical drive system by dismantling of gear, shaft, bush, lock, plat and repairing / rementaling & machining of shaft, making / fixing of new bush and other required work as per required by job.

Providing & Fixing of 2 Nos. new roller making by machining work including new shaft making accurate bore as per bearing dia and providing / fixing of new bearing of existing size the job includes providing and fixing of new liner plate of both side for movement of roller for smooth working of classifier.

Making and fixing of new MS pin shaft of existing size.

Providing & Fixing of new gear box (gear ratio 12:1) of best quality suitable for 2 HP motor as per site requirement. Make:- Greaves/ Assenpro/DJB approved.

Providing & Fixing of new motor of 2 HP motor (3 phase, 4 pole, squirrel cage, 960 RPM, 50 Hz) on the foundation with nut bolts as per site requirement. Make:- ABB/crompton/kirloskar/approved in DJB.

Fabrication & Fixing of canopy on the motor and gear box for safety.

Supply of nut bolts as per site requirement.

Assembling of complete Rack classifier at site with all dismantled items at original position making proper alignment and balancing and fixing with hardware goods with the help of Chain block and manual labour with handling equipment.

Epoxy Painting at least 2 coats or more i/c primer of classifier.

Transport charges of tools & tackles and repairable parts at workshop To & fro.

AARADHYA CONSTRUCTION