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

Repairing of Detroiter No.1 by carrying out the following works:- Isolation of classifier from the hydraulic process by closing sluice gate and providing gunny bags to prevent access of influent. Dewatering the chamber with the help of submersible pump and cleaning including removal of silt and floating material etc.

Dismantling of complete Detroiter after cutting the fasteners with gas cutter & manual labours & shifting the same from the site.

Overhauling of center turn table after providing the temporary structure to lift the drive head gear, repairing of drive head gear including remitting and grinding the inside color, checking the trueness and greasing/ oiling the same as required.

Fabrication/ Supply/ Fixing of M.S. squeezer blades made out of M.S. angle of size 65x65x6mm & M.S. sheet of size 1 mtr. Long x 150mm app. and 8mm thick rubber squeezer of 100% synthetic rubber and fixing with nut & bolt i/c drilling hole as per sample (600 kg approx.)

Repair the main worm shaft including machining the shaft, replacement of bushes and bearing No. 1313 K. Make: SKF/FAG

Repair of Detroiter arms i/c replacement of damaged portion of the structure as per sample and compete in all respect, using MS channel 100x 50 mm & angle iron of existing size (350 kg approx.)

Replacement of main sprocket set (driver and driven) complete as per sample.

Providing/Fixing the M.S. chequrred sheet 1200mm wide, 12mtr length and 8 mm thick for the walkway of the main Detroiter the job i/c strengthening the complete structure with the different size angle iron as per site requirement.(900 approx. kg)

Painting of complete Detroiter by scrapping of rust from the structure. Painting with red oxide epoxy paint of underwater portion & upper portion painted with enamel paint with two coats of epoxy paint.

Civil work of damaged foundation after removing of old channel & fixing of new.

Repairing of pipe safety guard at inlet chamber of 16 MGD, STP by carrying out the work as under:- Dismantling the old existing worn out pipe railing from the inlet chamber by cutting the old rusted nut bolt and shifting to the old material stock yard with suitable man power as per requirement at site.

Providing of M.S. heavy duty 40 NB pipe as the horizontal Member of safety railing at inlet chamber.

Fabrication/ supply of M.S. vertical post of M.S. angle size 50 x 50 x 6 mm with the provision of bottom plate for grouting at site as per requirement.

Fixing the vertical post at site with proper fasteners/ nut bolt including civil work as per site requirement.

Fixing the horizontal pipe on the vertical post including the work cutting/ welding etc. as per requirement.

Painting the pipes railing after proper cleaning with one coat of epoxy primer and two coat of epoxy paint.

Repairing of Rake Classifier No.1 at 16 MGD, STP at Okhla by carrying out the following works: - Dismantling of complete structure of classifier from the pit channel with the help of heavy labour, cutting the Nut Bolt with the help of Gas cutter, cutting the frame of the main arm. Removing & shifting to the workable place.

Providing set of Guide Shaft & Pins fabricated as per sample in terms of shape, size, i/c machining the pins as per bush size.

Replacement the set of GM Bushes both end collared. The job i/c providing the new bushes with, center/ pins as per manufacturers standard in terms of size & finishing as per shaft (16 Nos.).

Providing of main crank shaft fabricated as per sample in respect of MOC and size having 4500mm length with Gun metal ring OD 300mm ID-260mm as per sample i/c cross support.

Fabrication and fixing of brackets by casting as per site requirement in respect of size and MOC.(400 kg)

Providing the new scraper assembly having new scrapers. 95 NOS made out of M.S. flat size 65mmx8mm. Length of each scraper will be 610mm. Fixing the scrapers on the structure made out from channel size 150x70x6mm as per M/standard to hold & support the scrapers. (557 kg approx.)

Providing the nut bolts of different size and hardware goods for the fixing of complete structure on site.

Painting of complete rake classifier by scrapping of rust from the structure. Painting with red oxide epoxy paint of underwater portion & upper portion painted with enamel paint with two coats of epoxy paint.

Testing and commissioning of classifier system after general servicing of starter, Motor, making electric connection and testing of the same on load at site.

ARIHANT ENGINEERS AND TRADERS (BID ID -1556936)