Tender For Nctps Ii Mi Circle Bm Unit Ii Aoh 2025 26 Of Pa Fan 2A; 1 Charges for removal of PA fan labyrinth seals, loosening of fan casing bolts, lifting of rotor top casing assembly forinspection of fan impeller blades, removal of casing asbestos rope as directed by the Engineer in charge includingconsumables and T&Ps 2 Charges for complete cleaning and conducting Di-Penetrant Test for Stage.I & II (40 nos) PA fan impeller blades. Fan impeller blades are to be cleaned by using service air & rustoline and by applying cleaner, penetrant & developer over the impeller blades and analyse the condition of all fan blades and to make records.After conducting DPT, ensure the healthiness of all impeller blade conditions and ensure the free movements of all blades till the satisfactory level. Finally, check the torque tightness of all impeller blades with pre-set recommended torque value to complete as directed by the Engineer in charge including consumables and T&P’s. 3 Charges for alignment of fan & motor coupling, checking run out of HAD andradial clearance between fan blades & casing: This work involves releasing of PA fan & motor coupling guard and fixing the rotating clamp in fan & motor coupling ( fan coupled with motor) for rotating fan shaft, releasing of shaft bullet cover, rotating shaft and checking the pre alignment readings for fan & motor for initial reference and records. Decouple the motor from fan, align the motor with fan axially and radially within the allowable limits. Checking & aligning the run out of HAD within the limit and checking the radial clearance between the fan impeller blades and fan spiral inner casing are within the allowable limits. Checking the axial clearance of PA intermediate shaft to rotor assembly, rotor assembly to Hydraulic adjusting device, checking the torque tightness of fan intermediate shaft bolts & rotor assembly bolts and releasing of rotating clamp fixturesfor conducting motor trial run. After completion of motor trial run, couple the motor with fan and normalise the systems as directed by the Engineer in charge including the cost of consumables and T&P’s. 4 Charges for complete cleaning of PA fan casing top & bottom matting flanges, fan casing pedestal bolts and diffuser base bolts, renewal of casing asbestos rope, refixing of rotor top casing assembly, tightening of casing bolts, refixing of labyrinth seals, releasing of rotating clamp from fan shaft, refixing of coupling guard, closing of all inspection doors, checking the tightness of fan casing pedestal bolts and diffuser base bolts, releasing of locking pin from the fan discharge gate as directed by the Engineer in charge includingconsumables and T&Ps. 5 Charges for complete draining PA fan lube oil from lube oil tank, dismantling of lube oil lines, strainers, filters, pumps, valves, ACW valve fittings and renew the damaged fittings and attending oil/ACW leaks. Cleaning of oil cooler tubes, removalof ‘O’ rings & gaskets, refix the cooler components, flushing and boxing up of coolers. Cleaning of lube oil tank, filling of new/old lube oil upto the adequate level, connecting the lube oil lines & its fittings to fan and motor bearings, control oil lines & its fittings for Blade Pitch Controls, charge the cooler with ACW,conducting Lube oil pumps trial run and normalizing the lub oil system to complete as directed by the Engineer in charge including theconsumables and T&P’s. 6 Charges for renewal of wornout/defective rubber beading with nylon canvas inserted and glass fibre cloth (Labyrinth Seal) of PA fanrotor casing. Cutting & edge preparation of glass fiber cloth & rubber beading nylon canvas as per required size. Applying adhesive lotion on the glass fiber cloth, folding & pasting over the two side edges of rubber beading with nylon canvas as lining to complete as directed by the Engineer in charge including the cost of transportation, consumables and T&P’s. 7 Charges for renewal of wornout/defective non metallic rubber beading with nylon canvas inserted and glass fibre cloth (labyrinth seal) in PA fan discharge (Diffuser to transistion duct). Proper arresting of existing layrinth seal rings at four sides (Top,bottom,left & right sides) , Cutting and removal of existing corroded bolts & nuts and releasing of wornout/defective rubber beading with nylon canvas inserted and glass fibre cloth of labyrinth seal ring. Cutting & edge preparation of new glass fiber cloth & rubber beading nylon canvas as per required size, marking & punching the holes in rubber beading with nylon canvas inserted and glass fibre cloth and positioning with layrinth seal rings. Applying adhesive lotion on the glass fiber cloth, folding & pasting over the two side edges of rubber beading with nylon canvas as lining. Fixing of new bolts & nuts for labyrinth seal rings and tightning of all bolts & nuts as recommended, releasing of arresting supports and normalising to complete as directed by the Engineer in charge including the cost of transportation, consumables and T&P’s.
