Reconditioning of 900 VM-2, 60 cusecs 32.30m head VT pump of unit No.5 installed at Tawi Pump House by way of replacement of damaged components.

Amount

Transportation charges for shifting of worn-out damaged parts of 900 VM-2, 60 cusecs, 32.30m head VT pumping unit No.5 after dismantling of shaft enclosing tubes, S.S Line shaft, bearing holder and allied parts to the workshop by way of loading/shifting from Tawi pump house and unloading the same at the workshop with the help of crane and manual labour. Fabrication of Muff coupling out of SS AISI-410 having inner dia. 95 mm, outer dia. 175mm and 360mm in length in two halves, each half having the provision for fitment of 16 mm Allen key bolts 4 no with provision around the periphery of inner dia. at required distance of 30mm from both ends, 20mm wide and 8mm deep on both halves and also making provision for through and through fitment of flat keys 25mm wide and 8 mm deep in the Centre of the 2nd half of the coupling. Repairs to 3rd shaft enclosing tube of VT pump by way of checking of face-to-face alignment and eccentricity developed in the enclosing tube at different off-sets with the help of dial gauge on lathe machine. Removing of eccentricity developed after welding /patching at the cracked portion with suitable M.S. welding electrodes and also welding of the cracked stiffeners of the flanges of the enclosing tubes. Reconditioning to 4th line shaft of VT pump by way of rebuilding worn out seat portion of the bearing on the line shaft with suitable S.S. electrodes conforming to AISI-410 grade. Turning, finishing, 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. Reconditioning of 01 No. line shaft bearing holder by way of rebuilding of the worn out/damaged inner portion of bearing holder using suitable machinable C.I electrodes. Turning, finishing and polishing the welded portion to the required size of the outer dia. of the line shaft rubber bearing. Reconditioning 01 no. guide spider by way of welding of damaged/worn out seat portion of guide spider with suitable C.I. electrodes and finishing the welded portion as required making the surface even. Extraction of broken/damaged bolts by drilling and rethreading the drilled holes for fitment of counter sunk bolts. P/F of rubber pads with counter sunk bolts in all the three arms of guide spiders. The job further involves back carriage of the repaired assembly parts i.e. shaft enclosing tubes, SS line shaft and Muff coupling etc. to the site of Tawi pump house by way of loading/shifting from workshop and unloading at site of Tawi pump house , Jammu with the help of manual labour. The job involves replacement of thrust pad of other 02 Nos guide spider- (06 Nos). Re-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 the Deptt.) bottom rubber bearing 1No., HT column bolts with nuts 120 x20 mm (reputed make) 24 Nos., HT shaft enclosing tube bolts with nut 110x16 mm 18 Nos. HT bolts with nuts 110x25 mm(reputed make) 15Nos., HT bolts 45x16 mm 10 Nos., HT Allen key bolts 40x12 mm 12 Nos., HT Allen key bolts 40x16 mm 10 Nos, HT Allen key bolts 40x5 mm 12 Nos, spring washers-16mm 24 nos., spring washers 12mm 24 Nos., fire fly sheet 1/32” 6 kg, fire fly sheet 1/16” 7.5 kg., rubber insertion sheet 1/18” 12 kg, gland packing ¾” 2kg,hacksaw blade double edge 6 Nos., HT bitumen tape roll, emery cloth 7 mtr., Dhoti cloth 3 kg., Grease -10 kg and servo system 46-15 liter 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.

M/S PERFECT ENGINEERING WORKS (BID ID -2324063)

M/S UTTAM ENGINEERS (BID ID -2323964)