Replacement of old damaged/broken components of 900 VM-2, 60 cusecs, 32.30m head VT pump of Unit no 1 installed at Tawi Pump House, Jammu.

Amount

Replacement of old damaged/broken components of 900 VM-2, 60 cusecs, 32.30m head VT pump no 1 by way of shifting of worn-out parts of 900 VM-2, 60 cusecs, 32.30m head VT pump to the workshop by loading in mechanical transport from Tawi pump house and unloading the same at the workshop with the help of crane and manual labour. Complete dismantling of bowl assembly of VT pump, servicing, greasing and re-assembling the bowl assembly including replacement of HT bolts/studs along with minor repairs to bowl assembly by way of welding worn out portion with welding electrodes. Grinding and finishing to required size. Providing/ Fitting by fabrication of new top shaft for 900 VM-2, 60 cusecs VT pump out of AISI 410 stainless steel as per sample, 95 mm dia having provision of seat portion of gland at the required distance from the bottom end. The top end shall consist of 75 mm dia threading as per sample up to the required length from top end. Top shaft shall have provision of keyway all around the shaft 6mm deep, 20mm wide at a required distance as per sample from bottom end to accommodate round keys of muff coupling and also 95 mm long, 6mm deep and 20mm wide keyways for flat keys of muff coupling at the required distance as per sample. The job also includes cutting the 220 mm long and 8 mm deep keyway at the top end below the threaded portion as per sample to accommodate the cotter for pump coupling. The shaft shall be turned, finished and polished to the required final dimensions. Rebuilding of worn out/ damaged inner portion of 1 no. bearing holder using suitable machinable CI electrodes. Turning, finishing and polishing the welded portion to the required size of the outer dia. of the line shaft rubber bearing. Providing/ Fitting of new stuffing box by way of fabrication of stuffing box as per sample cast out of CI alloy 370mm in height having inbuilt flanges of 320mm dia and 20mm thick at a distance of 225mm from the bottom end of the stuffing box having 170mm outer dia and 124mm inner dia and 200mm long seat portion inside the bottom end in the stuffing box for housing line shaft rubber bearing. The top end of the stuffing box is having 180mm outer dia, 130mm inner dia and 115mm long seat portion for gland packing. Provided with 4 no. stiffener at the top end at an equal distance and through and through 160 mm long 16mm dia hole at the top end for lubrication of line shaft rubber bearings. Drilling of 8 no. holes of 18mm dia at a distance of 20mm from the outer end of the flange. The stuffing box shall be checked with dial gauge on lathe machine. Reconditioning of 3rd line shaft of VT pump by way of rebuilding of worn-out seat portion of the bearing on the line shaft with suitable S.S. electrodes conforming to AISI-410 grade. Turning, finishing, and polishing of the rebuilt portion to required size. Checking of eccentricity developed at the different off-sets of the shaft during operation and removing the eccentricity developed by means of press bench. The tolerance limit be kept within the prescribed limit of +0.03 mm. then repairs to shaft holes /pin holes/key ways including fabrication and fitting of SS pins, SS keys and one no. jib head key as per sample. The complete job involves back carriage of the new fabricated parts along with other parts to the Tawi pump house by way of loading in mechanical transport at workshop and unloading at Tawi pump house, Jammu with the help of manual labour. The job involves Providing/ Fitting of other consumable parts during execution of job by replacement of thrust pad of other 03 Nos guide spider- (09 Nos). Assembling and lowering of extracted VT pump and column assembly involves complete wiping ,cleaning repaired parts, lowering of complete bowl assembly , column assembly in proper sequence by fitting of column pipes and fitting further, lowering fitting of shaft enclosing tube along with line shaft one by one to discharge head and Tee joint fitting with rising main of 36” dia. P/F of consumables items during lowering of the VT pump like line shaft rubber bearing 7 Nos (provided by department)., bottom rubber bearing 1No., HT column bolts with nuts 120 x20 mm (reputed make) 20 Nos., HT shaft enclosing tube bolts with nut 110x16 mm 16 Nos. HT bolts with nuts 110x25 mm(reputed make) 08Nos., HT bolts 95mmx20mm 12Nos., HT bolts 65mmx16mm 16 Nos., HT bolts 55x16 mm 10 Nos., HT Allen key bolts 40x12 mm 06 Nos., HT Allen key bolts 40x16 mm 06 Nos, HT Allen key bolts 40x5 mm 12 Nos, spring washers-16mm 24 nos., spring washers 12mm 24 Nos., fire fly sheet 1/32” 5 kg, fire fly sheet 1/16” 5 kg., rubber insertion sheet 1/18” 12 kg, gland packing ¾” 2kg,hacksaw blade double edge 6 Nos., HT bitumen tape roll, emery cloth 6 mtr., Dhoti cloth 3 kg., Grease -10 kg and servo system 46-15 litre for topping of motor ( servo system46, provided by Deptt.) Fitting of pump and motor half coupling, checking alignment of pump and motor using dial gauge, making all the electrical connection, tightening bolts, providing of gasket, electrical thimbles and then testing on full load. Skilled person shall be provided by the firm for extraction /fitting /assembling of parts during lowering of VT pump. Complete job includes cost of materials and labour charges.

BEE AAR ENTERPRISES (BID ID -2249355)

M/S K S ENGG WORKS (BID ID -2235548)