MTPS1 TM Unit II Overhauling of OLCTC System Pump LHS RHS Overhauling 1600 mm Butterfly valve and its actuator gear box of cooling water inlet and outlet pipe lines in condenser Inspection Cleaning of Condenser CW box steam side Hot well

Amount

Overhauling of OLCTC system pump:- Decoupling the pump, disconnection of the pump from suction and discharge pipe flanges, draining the lub oil from the sump.

Dismantling of the Bearing Covers, Bearing Bracket, Dismantling of shaft sleeve and dismantling of the casing etc.,

Dismantling the impeller Assembly from the Casing, Inspection and reconditioning the eroded portions of the casings if required, Inspection, Checking measurements and tolerances of the impeller, shaft, impeller wearing ring, casing ring and neck ring and replace all the above if necessary including machining of the wearing rings to the required size and assembling with the impeller suitably

Reassembling and positioning of the rotor assembly and closing of casing cover, reassembling the sleeve, Bearing Bracket Bearings, Bearing Covers and assembling the coupling in shaft

Checking and correcting the pump alignment with motor and connecting of pump flanges with renewed gaskets. Inspection of couplings, Coupling the pump with motor, connecting the pump from suction and discharge pipe flanges, and other such works required for efficient operation of the pump and commissioning. Cleaning & painting the complete pump assembly & Base structure, Painting inside the pump casings, and painting of the pump base concrete structure, with Oil Distemper (Paint under Contractor’s Scope)

Opening of condenser water box manhole door, cleaning of water box and tubes and removing the entrapped debris (Shells) from the CW inlet pipe line bends. Opening of water box man hole door, arranging the safety ropes and safety equipment’s, cleaning the water box, removal of debris from the water box and tubes and closing of man hole doors with new gaskets.

Closing of front & Rear manhole doors of 16 Nos for Condenser LHS & RHS. Manhole doors after renewing all the manhole door rubber chords and Providing and removing condenser jack pipes during vacuum tightness test.

Inspection of OLCTC System Ball collecting screen:a) Opening of OLCTC System Ball collecting screen manhole doors LHS & RHS-2Nos. and cleaning the debris and closing of manhole doors with renewal of gaskets.

Cleaning and painting works including cost of paintings.Cleaning and painting of CW Inlet & outlet pipe lines and CW Box of condenser(LHS & RHS) with double coat , Two Coat of side (LHS & RHS) painting of CW Inlet & outlet pipe lines of condenser in outer side (LHS & RHS)

Overhauling of 200mm condenser air release cum vacuum breaking valve and its isolation gate valves and gear mechanismDismantling the isolation valve, air release cum vacuum breaking valve of size 200mm,Cleaning all the parts, lapping the seating surface like valve seat and gates, checking blue contact, changing the internals if necessary and reassembling the valves with new gland packing’s, “O” Rings etc.

Inspection and cleaning of Hot well and steam side of condenser (LHS& RHS)Opening/Closing the Condenser Steam side & Hot well manhole doors of 6 Nos., Cleaning inside the hot well to remove the dust and impurities, inspection the steam side area, cleaning of spray nozzle, cleaning the rubber chord seating groove and surface area of the manhole and closing after renewing all the manhole door rubber chords.( Rubber chord contractor scope)

Overhauling of condenser Cooling water Box drain valves/ air vent valve/ cooling water inlet , outlet valve. Dismantling the valve, cleaning all the parts, checking the seating surfaces of Gate/seat. Lapping the seating surfaces of gate/ seat for perfect blue matching. Reassembling the valve with new gland packing rings and bonnet gaskets without any leak.

Overhauling of gear box ,Inspection of valve disc &Nitril seal in 1600 mm BFV and drain valves of coolingwater inlet and outlet pipe lines :- 1) Providing scaffolding arrangement inside cooling water inlet and outlet pipe lines in Unit – II condenser to attend the inspection of valve disc & Nitril seal in 1600 mm BFV for safe working and dismantling the scaffolding arrangement after completing the rectification work.

Overhauling of 1600 MM Butter fly valve along with Gear Box Assembly of cooling water inlet and outlet pipe lines in Unit – II 689 TML-2180 TM condenser (LHS and RHS) which includes dismantling of actuator, gear box assy. O/H of Gear box inspection, renewal of spares if necessary and overhauling of B.F.V of size 1600 mm including dismantling the bearing assembly at both ends renewal of spares if necessary and reassembling a) Dismantling of manhole door and assembling the same after completion of work. non-metallic gaskets etc.

Overhauling of Gear box assembly of B.F.V, including dismantling of actuator, gear box assembly, inspection, renewal of spares if necessary and re assembling.

overhauling of B.F.V of size 1600 mm including arresting the valve disc with screw jack etc. dismantling the bearing assembly at both ends renewal of spares if necessary and reassembling.

Charges for Consumables and T&P’s item Sl.No:1 to 16

cutting gas

Enamel paint

Rubber chord

Rubber seal for 1600mm NB Butterfly valve Material : NITIRLE RUBBER Hardness: 60 To 70 Shore A Size: OD-1565MM, ID-1450MM, Thick-12MM, PCD-1510MM, No.of Holes-64 Nos & Hole Dia-12MM

NEW SRI VENKATESWARA ENGINEERING WORKS (BID ID -1517899)