Roha- Repairs of CLF bridge and allied works at

Amount

Item Description

Repairs to central bearing assembly and central turn table : -This item includes supply of new central bearing assembly consisting of imported thrust bearing having adequate vertical load carrying capacity of not less than 2.5 ton to carry the vertical load of the equipment and two radial ball bearings to counter the radial load of the walkway. The bearings are housed in a bearing housing fabricated from high grade seamless pipes specially used for manufacturing heavy duty bearings and high carbon steel plate having high shear strength properties. The fabricated housing is machine on high precision lathe machine and cylindrical grinding machine to close tolerances required for press fit of N9 grade. The housing along with the outer race of radial ball bearing shall rotate where as the inner race of the bearing shall be press fit on a spindle with plate .The spindle with plate is fabricate from high carbon high chromium steel machined on high high precision lathe machine and cylindrical grinding machine to close tolerances to achieve n-9 finish. The bearing assembly is also provided with hinje pin joint to cope the misalignment caused due to level difference if any between the traction path and central shaft top. The central bearing assembly is welded to a base plate or a foundation plate which is firmly anchored to the central column. The bridge walkway is supported on the bearing assembly via a sturdy central support frame fabricated from m.s channel and angle. The central support frame / turn table and all other steel parts shall be epoxy painted/ galvanized.

Overhauling of central bearing assembly of CLF

Repairs to flocculator drive assembly including repairs to worm gear reducer, electric motor and replacement of C.I. couplings etc. complete.

Repairs to traction drive assembly inclding repairs to worm gear reducer, electric motor and replacement of C.I. couplings etc. complete.

Repairs to inner suspender assembly in flocculator tank : -Providing, erecting and commissioning new inner suspender assembly consisting of framed structure fabricated from m. s. structural steel such as angles and channels of adequate size and section, The entire shall be sand blasted, pickled and then epoxy Painted/ galvanized icluding bottom scrapers 6 Nos.

Repairs to outer suspender assembly in clarifier tank :-Providing, erecting and commissioning new outer suspender assembly consisting of framed structure fabricated from m. s. structural steel such as angles and channels of adequate size and section. The entire structure shall sand blasted, pickled and then epoxy Painted/ galvanized .icluding bottom scrapers 9 Nos.

Electrical control panel : Replacing worn out and faulty parts such as contactors, starters, other electric parts by new parts. Replacing the old cubical panel by new cubical panel fabricated from 16 swg C.R. Sheet with powder coating. All the parts in the panel shall be interconnected by copper wire. This ite also includes replacing the old faulty slip ring assembly by new slip ring assembly.

Cabling : Removing old faulty cable and replacing the same by new copper cable 4sqmm, 4 core armoured copper cable.

Cleaning the pipe surface using solutionizers, enumerated below by removing all scales loose particles and preparing the surface for receiving paint.

Providing and applying anti rust chemical resistant epoxy coating of approved colour, including scaffolding if necessary.

Rebate : for scrap generated from old faulty CLF parts ,flash mixers , alum stirrers , gates etc complete.

SUN ENERGY CONSULTANCY SERVICES (BID ID -6532202)

S K ENGINEERING WORKS (BID ID -6533506)

SV Biradar (BID ID -6532154)