Reconditioning of 900 VM-2, 60 cusecs 32.30m head VT pump of unit No.2 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.2 including other items such as 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.

Fabrication oftop 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. Complete job includes cost of material and skilled labour charges and carriage charges to site

Fabrication of stuffing box as per sample 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 having 180mm outer dia,130mm inner dia and 115mm long seat portion for gland packing. providing of 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 line 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 to 3rd line shafts of VT pump by way of rebuilding ofworn-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.

The job further involves back carriage of the repaired/Fabricated parts i.e., Bowl assembly, shaft enclosing tubes, SS line shaft, Muff coupling, Stuffing box 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 pad-9nos, line shaft rubber bearing 7 Nos, 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) 08 Nos., HT bolts 55x16mm 10 Nos., HT Allen key bolts 40x16 mm 10 Nos., HT Allen key bolts 40x12 mm 12 Nos., HT Allen key bolts 40x5mm 12 Nos., spring washers-16 mm-24 Nos, spring washers 12mm 24 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 7 mtr, dhoti cloth 3kg, Providing lubricating oil 15 liters servo system 46 (servo system 46 and Grease 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

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M/S K S ENGG WORKS