NIT No-17 EE (SDW) II/ (21-22) Item No. 1

Renovation/ strengthening mechanical Bar Screen No. 1 Installed at 16 MGD STP Okhla by carrying out the following works: - including all the required works, materials, arrangements, tools & tackles, workmanship, safety equipments as per NHRC\NGT\ DPCC etc guidelines and as per site requirement, remodeling all the damages up to standard if occurred any complete in all respect as per requirement satisfactorily. 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 & D.G. Set. Maintaining the flow of Effluent to another Channel.

Dismantling of Electric Motor, Reduction Gear Box from the Top of Bar Screen 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

Replacement of main shaft of EN-8 material of size Dia-75mm, Length-4000mm duly machining key way etc. as required.

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

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

Providing of M.S Bar Screen of sizes 3050 mm x 1560mm made out from M.S Angle Iron of sizes 80 x 80 x 10 mm & M.S. Strip/ Flat 50 x 10 mm. 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.

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 guide rails fixed on pivot shaft to maintain similar space between pivot shaft and guide rails & fixing of bracket to maintain its original position.

Fab./Providing 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.

Replacement of damaged strips as per original size and site conditions with proper finish to take flow smoothly during upward / downward operations. The work also includes strengthening of damaged strips.

Providing the new 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 good quality enamel paint after removing debris and proper surface finish.

Testing and commissioning charges.

MK ENGG.CO.