OT 08/2020-21

Amount

Charges for removing the damaged / worn out seal assembly from the existing hot air gate seating duct side walls, fixing the new seals (20mm Square rope x 1600 mm x 4 sides x 2 rows) in Hot air gate seating duct surfaces and strengthening of Seal Beam & Guard plate etc… (Required qty. of 20 mm Square wire braided asbestos rope are under contractor scope)

Charges for dismantling, cleaning, reassembling the hot air gate assembly outer box side cover, checking and inspecting the rope, gate travel wheel, guide ways & renewal of worn out parts if necessary including cost of providing necessary scaffolding arrangements around the hot air gate resting outer box side cover, hot air damper and lock/unlock gate cylinder etc… at 10 m elevation from ground level.

Charges for dismantling the pneumatic operated power cylinder from the hot air gate & lower down to the mill repair bay, remove the end caps, piston shaft with flange, lock nut etc… one by one, cleaning, checking and inspecting the piston seals, ‘o’ rings & renewal of worn out parts etc… if necessary, reassembling to the hot air gate body and checking the trouble free operation of hot air gate movement etc...(Required qty. of seals will be supplied by TANGEDCO at free of cost)

Charges for dismantling the lock / unlock shaft, various links, cylinder, cam shaft one by one from hot air gate floor to ground floor, cleaning, welding the cam shaft worn out portion by welding, grinding the welded rough surface up to required size, applying grease, dismantling of cam shaft cylinder internals, renewal of worn out cylinder seals & worn-out parts etc… if necessary and finally checking the open/close operation of lock / unlock gate cylinder etc…

Charges for dismantling the damaged/worn out shims from the hot air damper leaf both edges, renewal of hot air damper leaf both edges by using 1 mm tk. S.S. 316L shims for arresting the hot air passing through hot air dampers while damper in fully closed condition including the cost of new 1 mm tk. S.S. 316L shims of size 1520 mm x 120 mm x 1 mm thick x 4 Nos etc… (Required qty. of S.S.316L shims are under contractor scope)

Charges for dismantling the C&I pneumatic operated power cylinder of hot air damper, cleaning & reassembling the hot air damper gear box, inspection of hot air damper leaf shaft, bearings & renewal of worn out parts, flange ropes, bearings etc… if necessary & finally reassembling to the hot air damper duct etc...

Charges for leading, lifting, transporting of retrieved worn out / under cut shaft from hot air dampers, Lock & unlock cam shafts to outside workshop, reconditioning the worn out portion of bearing seating both end by welding and machining the required size of uneven outer surface of shafts and finally roller shaft trueness checking etc… and return to MTPS-II hot air damper work site.(Transporting of shafts for machining works under contractors scope)

Charges for dismantling the cold air gate assembly & actuator assembly and lower down to the mill repair bay, cleaning, reassembling the cold air gate assembly, overhauling of actuator assembly, checking and inspecting the guide ways, renewal of flange rope, worn out parts, bearings etc… if necessary.

Charges for dismantling the C&I pneumatic operated power cylinder of cold air damper, cleaning & re assembling the cold air damper gear box, inspection of bearings & renewal of worn out parts, flange ropes, bearings etc… if necessary & finally reassembling to the cold air damper duct etc….

Charges for replacing of worn out bolt & nut and asbestos rope of Hot air gate flange including the cost of consumables etc… (Required qty. of Asbestos rope and HT Bolt & Nut of size M16 x 50mm-48 Nos./ gate are under contractors scope)