MID/AN/89

1. Dismounting of 300 kW, 400HP BHEL Make HT motor from its place of installation by way of disengaging all its three phase cable connections of rotor, stator, commutator assembly, trifurcated sealing box, etc. Opening & disengaging coupling set (Motor half coupling & Pump half coupling) of Unit No. 02, separating motor from motor skirt by opening all its nuts & bolts and placing motor on steel fabricated stool properly. Complete job. 01 no.job 2 Transportation charges for shifting of worn out items from LIS Rajal to workshop and back shifting to site of installation after strengthening / reconditioning involving manual loading , mechanical transportation and handling charges. Complete job 01 Job 3 Fabrication ,providing and fitting at site C.I. guide spider set with three legs complete comprising of one no. guide spider suitable for line shaft of size 70 mm dia. three no.’s rubber pads, and slotted CS M12 x 20 mm screw, one no, rubber bearing, one no. cover for rubber bearing and bearing screws and washers (as per sample) Complete Job 2 no. jobs 4Fabrication ,providing and fitting of A151-410-55 muff coupling of size of length 300 mm and bore size to suit line shaft of dia. 70 mm along with its top & bottom split nuts and keyways. The machining should be done accurately for proper fitment and removal as and when desired during dismantling of column assembly. (as per sample) Complete Job 1 Job 5 Providing and fitting at site of M20X50mm high tensile steel bolts and spring washers. 32 Nos. jobs 6 Repairing of the stuffing boxes of 20 cusecs discharge VT pumpninstalled at LIS Rajal by way of shifting the same to workshop, extraction of the damaged CI sleeve, re-welding of all corroded surfaces with suitable welding electrodes, Providing/ machining of new sleeve of appropriate size inside the stuffing box neck for retention of the rubber bearing bush, gland packing. Also providing/fitting of new rubber bearing bush, MS locking plate along with suitable bolts on the bottom of the stuffing box, removal of the broken gland bracket holding studs from the stuffing box surface, re-threading & fitting of new studs of required size. Complete job 01 no. job 7 Reconditioning of SS AISI-410 line shaft 70 mm dia. 2.15 mtr. long at worn out portions by way of rebuilding the worn out, undersize portions by remetalling with special SS welding electrodes in layers and then turning, grinding, polishing, finishing to true size and specifications including rebuilding, finishing of key ways to true size. Also removing & checking eccentricity of line shaft with dial gauge at various off sets. Removing deflection/eccentricity by heat treatment or on hydraulic press, removing of deflections on heads/ ends and then again checking the alignment of the shaft on lathe machine. P/F of new fabricated AISI-410-SS cotter pins of line shaft. 03 no. Jobs 8 Repairing of Guide spider by way of replacement of rubber bearings, nitrile rubber pads for arms, CS head screws M12 x 20mm, MS cover dia. 130mm with drilled 4 nos. holes for rubber bearing locking and locking screws M10 mm. 03 no. Jobs 9 Reconditioning of 200 mm dia. x 2000mm length, ERW shaft enclosing tube by cutting, removing from both ends of 200 mm dia. shaft enclosing flanges and fitting of new flanges similar size as specification to each end of the tube which should have six nos. of M20 dia. size threads, MS welding to both ends of the flanges with main tube and then turning, facing both the ends in respect of all over accurate thickness, straightening and alignment, facing of the flanges. Complete job. 05 no. Jobs 10 Repair/reconditioning of AISI 410-SS muff coupling along with its top & bottom nuts by way of rebuilding at old worn out portions with re-metalling with special S.S welding electrodes, then turning, finishing to true required size and rethreading both the nuts required portion of the coupling, finishing of all the surfaces of nuts and muff coupling for proper fitment along with rebuilding of key ways. Complete job. 3 no. jobs 11. Assembling of each column one by one with 70 mm shaft, 200mm internal tube and 500mm external pipe in sequence while lowering in the respective pit along with assembled bowl assembly. This includes fitting, lowering of line shafts, guide spiders, muff couplings, top shaft, tension tube, deflector tube, joining of discharge surging head with delivery line 500 mm dia. along with providing and fitting of relevant joining material, fire fly sheet, graphite packing, grease packing, 19 mm size nuts, bolts, washers, fitting and tightening after complete alignment, leveling etc. Complete job. 01 no. Job 12. Testing of pumping unit which includes installation of 300KW, 400 HP, 6.6 KV VT motor solid shaft BHEL make HT motor on the skirt and its alignment with respective pump half coupling, reconnection of dismantled cable connections of 6.6 KV, 3 phase to rotor, stator, slip-ring assembly, liquid rotor starter trifurcated sealing box and , cleaning of all carbon brushes, connecting of motor half coupling with pump half coupling, checking all connections with proper alignments and adjustment and testing of pumping unit for its proper operation. 01 no. Job

HITECH MECHNICALS (BID ID -2677230)

js electrical and machanical works (BID ID -2677498)