Reconditioning of 900 VM-2, 60 cusecs 32.30m head VT pump of unit No. 6 installed at Tawi Pump House by way of replacement of damaged components.

Amount

Transportation charges for shifting of worn-out column assembly and bowl assembly of 900 VM-2,60 cusecs, 32.30m head VT pumping unit No 6. including other items such as guide spiders, shaft enclosing tubes, muff couplings, S.S line shaft to the workshop by way of loading in mechanical transport from Tawi pump house and unloading the same at the workshop with the help of crane and manual labour

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.

Replacement of Third Shaft Enclosing tube By way of fabrication of new shaft enclosing tube out of 8 inches dia. ,8 mm thick MS seamless pipe having length 2970 mm including thickness of flanges .Fabrication of two nos. flanges ,30 mm thick,320 mm dia. having 12 nos. holes of 18 mm dia. on both the flanges at an equal distance of 30 degree on both the ends of the shaft enclosing tube with the provision of seat portion 230 mm wide and at a distance of 795 mm from the flanges for the fitment of guide spider along with the provision of six Nos. stiffeners on each flanges at an equal distance and welding the same with pipe from both ends .The shaft enclosing tube shall be painted with two coats of red oxide and then with two cats black enamel Complete job includes cost of material and labour charges including fitting.

Reconditioning of the bowl guide of VT pump by Providing and fitting of new bowl guide sleeve by way of extraction of damaged sleeve and fabrication of new bowl guide sleeve out of C.I material as per sample, turning, finishing, polishing to required size, facing of the flange for proper fitment into the bowl guide, drilling 12 No. equidistant holes at the flange for proper fitment of 16mm bolts, machining of inner bore of sleeve to the required dia of the outer dia of the line shaft rubber bearing. Providing and fitting of 12 Nos. HT bolts of 65mm X 16mm size with locking washers for fitment of bowl guide sleeve into the bowl guide. Job includes rebuildingof seat portion for fitting of sleeve on the bowl guide by way of re metaling, turning finishing and polishing to the required size drilling of 12 Nos holes with threading of 16 mm dia for fitment of sleeve. complete job includes cost of material labor charges including fabrication cost.

Reconditioning to one No. Muff coupling by extraction of broken/damaged bolts from both the halves of the S.S. coupling by drilling and rethreading the drilled holes from 16mm dia. Allen bolts. Repairs/rebuilding of key ways in both the halves by welding the damaged /worn out portion with the suitable S.S. electrodes and turning, finishing ,polishing of the welded portion to the required size and then polishing the muff coupling.

Reconditioning to 3rd 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 with in 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

The job further involves back carriage of the repaired/Fabricated column assembly and bowl assembly parts i.e. guide spiders, shaft enclosing tubes, Muff coupling and SS line shaft, etc. to the site of Tawi pump house by way of loading in mechanical transport at workshop and unloading at site of Tawi pump house , Jammu with the help of E.O.T. crane and manual labour .

The job also includes providing of consumables items for fitting during lowering of the VT pump like thrust pads-06 Nos, line shaft rubber bearing 7 Nos., bottom rubber bearing 1No., Bolt with Nuts such as -HT column bolts 120 x20 mm (reputed make) 16 Nos., HT shaft enclosing tube bolts 110x16 mm 10 Nos. HT bolts 110x25 mm(reputed make) 08Nos., HT bolts 45x16mm 10 Nos., HT Allen key bolts 40x16 mm 6 Nos., HT Allen key bolts 40x12 mm 12 Nos., HT Allen key bolts 40x5mm 12 Nos., spring washers 12mm/ 16mm-48 Nos., fire fly sheet 1/32 6 kg, fire fly sheet 1/16 5 kg., rubber insertion sheet 1/18 12 kg, gland packing ¾” 2 kg, Grease 10 Kg, hacksaw blade double edge 6 Nos., HT bitumen tape roll, emery cloth 6 mtr, dhoti cloth 3kg. Providing lubricating oil 15 liters servo system 46 (Grease and servo system 46 to be provided by the department.). Fitting of pump and motor half coupling, checking alignment of pump and motor using dial gauge, making all the connections, tightening bolts, providing of gasket, electrical thimbles and then testing on full load. Complete job includes cost of material, carriage up to site and Skilled labour during assembling, Extraction, lowering and testing and commissioning of VT pump.

G S ENGINEERING WORKS

M/S K S ENGG WORKS