NIT No-09 EE (SDW) II/ (21-22) Item No. 08

Renovation of Detroiter No.1 by carrying out the following works: - Dismantling of complete Detroiter after cutting the fasteners with gas cutter & manual labours & shifting the same from the site.

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

Providing/ Fixing of rolling elements of 30mm approx dia. for operation of gear with hard chrome nickel plated of stainless steel having resistant to sewer water.

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 with rubber squeezer of 100% synthetic rubber. Fixing with nut & bolt i/c drilling hole as per sample.

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 & angle iron of existing size.

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

Renovation of Rake Classifier No.1 at 37(15) MGD, STP at Okhla by carrying out the following works: -Isolation of classifier from the hydraulic process by closing sluice gate and providing gunny bags on both sides to prevent access of influent. Dewatering the chamber with the help of submersible pump and D.G. set and cleaning including removal of silt and floating material etc.

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, MOC 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, centre/ pins as per manufacturers standard in terms of size MOC & finishing as per shaft

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 and length 110 mm as per sample i/c cross support.

Providing the new scraper assembly having new srapers 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.

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

Providing the M.S. Hopper made out of M.S. Plate size of sheet 1.2 mts x 1.75mts. x 6mm i/c fixing the same in the front of rack classifier with the help of 50 x 50 x 6mm Angle iron length of 5 meters approx.

Painting of complete structure. Painting with red oxide epoxy paint of underwater portion & upper portion painted with enamel paint with two coats of epoxy paint.

Testing & Commissioning the complete Grit Chamber including filling of lubricating oil completion in all respect.

PARTH SHARMA