NIT No-13 EE (SDW) II/ (23-24) Item No. 05

Detroiter: 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-slugging& cleaning Grit Chamber with the help of sump pumps 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.

Dismantling of vertical shaft, bottom chord and worn out scrapper arms structure with arms with the help of Gas cutter, all tools & tackle.

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

Renovation/overhauling of central gearbox including set of Central Gear, Pinion, & Set of Bushes 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 Detroiter 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.

Screw Conveyor: 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.

Repairing and renovation 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.

Renovation 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.

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

Painting of complete screw conveyer 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.

TARUN DIXIT