TTPS Operation Circle MPM I Unit III Overhauling and reconditioning of hot and cold air dampers gates ducts replacement of expansion joints seal air fan and cleaning of accumulated fly ash deposited inside the horizontal portion of the hot

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Charges for opening the manhole doors, dismantling the cold air damper links, Shaft, flaps, cleaning the above, applying grease, changing if necessary and assembling the above parts and confirming free movement of flaps etc.

Overhauling of Hot air damper.

Charges for dismantling the cold air gate, gear box, chain links and gates cleaning the above, applying grease changing the worn out parts and complete O/H of gear box and assembling the above parts and confirming free movement of gates etc.

Charges for welding of eroded and worn out portion of duct joints, and welded joints by welding with ms welding electrodes.

Charges for eroded portion of hot air duct side walls by cutting, grinding and fabrication and welding new m.s plats.

Charges for dismantling the bottom side knife edge gate valve assembly from tramp iron spout assembly, dismantling of tramp iron spout assembly, to facilitate release of knife edge gate valve at mill side (Top side) assembly from mill gear box after disconnect is the air line (pneumatic line) from knife edge gate valve , air valves box and air headers. Assembling back after overhauling of knife edge gate valve assembly. (Material will be supplied by boards).

Charges for dismantling worn out duct expansion joint from the hot & cold air duct, lifting, unloading from 4 mtr height and assembling of new or reconditioned expansion joint and devolution of scrap including the cost of consumables and T&Ps etc.,

Charges for removal of accumulated fly Ash deposited inside the horizontal portion of the hot air duct at 4.5 mtr& 18 mtr area for the entire duct area. The collected ash to backed in gunny bags and disposed it to ash slurry trenches at ‘0’ mtr level.

Charges for dismantling of Seal Air Fan’s suction side reducer, removal of fan cover and impeller, dismantling the plumber block with shaft and changing the worn out parts like bearings and Plumber blocks, and reassembling them in position after aligning with the fan motor. Cleaning of air filter, inspection of suction & discharge dampers, cleaning the flanges and arresting of air leak if any. This includes charges for lead, lift and transporting of materials from and to stores

Cost of Materials ( Contractor Scope ) Bearing 22213 with locating ring 12 / 120

Cost of Materials ( Contractor Scope ) Sleeve H313 and plummer block SN 513

Cost of Materials ( Contractor Scope ) Fenner F80 Rubber Coupling

Charges for transporting of impeller assembly to the work shop where dynamic balancing facilities available, Dynamic balancing of impeller assembly by adding weight where ever necessary and transporting back to site including and painting the impeller with the one coat of red oxide paint.

DURAI ENGINEERING WORKS