NIT No-05 EE (SDW) II/ (24-25) Item No. 01

Repairing mechanical Bar Screen Installed at 16 MGD STP Okhla by carrying out the following works: - All the required works, material arrangements, tools & tackles, and safety equipment’s as per NHRC\NGT\ DPCC etc. guidelines and as per site requirement,

Isolating the Mechanical Bar Screen from the hydraulic system by closing Sluice Gates and providing M.S sheets Gunny Bags before the Inlet Gate and after the out let Gate. Dewatering & desilting of the Isolated portion of the Screen chamber with the help of submersible pump & Maintaining the flow of Effluent to another Channel.

Dismantling of Electric Motor, Reduction Gear Box from the Top of Bar Screen with the help of gas cutter and manual labor and shifted to workable place.

Dismantling the structure/ Rack & Rusted/ corroded M.S. Screen along with other accessories of Mechanical Bar Screen with the help of gas Cutter and manual labour.

Replacement of main shaft of EN-8 material of size Dia-50mm, Length-2500mm duly machining key way etc. as required.

Dismantling of pivot shaft, its G.M bushes, bush locks, angle shapes bracket etc. The Work includes servicing of pivot shaft and replacement of bushes and assembling to its original positions.

Replacement of G.M Bush along with C.I Gland Bolt.

Providing of lock assembly, steel wire rope, D-clamp for operating mechanism.

Providing and fixing of M.S Bar Screen of sizes 3050 mm x 2000mm made out from M.S Angle Iron of sizes 80 x 80 x 10 mm (25 metre approx.) & M.S. Strip/ Flat 50 x 10 mm (120metre approx.). The M.S. Strip are to be welded vertically at an equal interval of 25mm facing thickness side of the flow i/c all welding & cutting works.

Replacement of guide rails 125x75x10 (10 meter approx) fixed on pivot shaft to maintain similar space between pivot shaft and guide rails & fixing of bracket to maintain its original position.

Fabrication of Frame of Rake Assembly along with C.I. Bracket made out form M.S. angle Iron of sizes 150 x 150 x 10mm in a length of 2500mm. The edges of Teeth are to be grinded for smooth movement in the screen for taking out the Floating material. The work includes providing/ fixing fasteners i/c drilling as required.

Fabrication of new bar screen outer frame by M.S Sheet 5 MM approx. 15sq.meter and required M.S angle 65x65x6 mm approx. 20 meter

Repairing/Servicing of reduction gear box

Assembling & fitting of the complete unit/ components/ structure with necessary Civil Works at site. i/c cost of all Fasteners.

Painting of bar screen with 2coat of high gloss synthetic black paint after removing debris and proper surface finish.

Testing and commissioning charges.

Shakti Trading Co. (BID ID -1556822)