75/MID/AN

Strengthening /Replacement of various damaged components of Column Assembly of 20 Cusecs discharge, 40 meters head, V.T Pump no 03 1installed at L.I.S Rajal by way of Rebuilding, reconditioning of S.S. A.I.S.I-410 impeller shaft 2.25 m long and 85 mm dia. worn out portions by re-metalling with special S.S. Welding electrodes in layers and then turning, grinding, polishing, finishing on lathe machine including rebuilding, finishing of key ways to true size. Also removing/checking eccentricity of impeller shaft with dia. gauge at various off sets. Removing deflection/eccentricity by heat treatment on hydraulic press. Removing deflection on heads/ends and then checking the alignment of the shaft on lathe machine. Providing and fitting of new fabricated A.I.S.I-410 cotter pins. Complete Job.

Reconditioning of C.I. guide spider by way of rebuilding, reconditioning of elongated holes of flanged ends to std. size, extraction of broken studs of rubber pad housing bush. P/F of new std. size nitride compressed rubber bush 1 No. rubber pads 3 Nos. with nut bolts, rethreading tapping the oversize holes and fitting of new manufactured studs of cover plates. Complete Job.

Providing and Fitting of C.I guide spider as per requisite sample, grade composition/specifications fitted with nitrile compressed rubber bush 1 No., thrust pad 3 Nos. ,M.S cover plate for bush along with 20 mm dia. X 50 mm long high tensile steel bolt with washer to column assembly of 20 cusecs discharge Jyoti makeV.T. pump. Complete Job.

Reconditioning of A.I.S.I-410-S.S. muff coupling along with its top and bottom nut by way of rebuilding at worn out portions with re-metalling with S.S. welding electrodes, turning, finishing to true size and rethreading the nuts and reqd. portions of cylinder with facing, turning all surfaces of nut and cylinder for proper fitment along with rebuilding of key ways.Complete Job.

Fabrication , providing and fitting of A.I.S.I-410-S.S 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.

Fabrication and providing at site heavy duty E.R.W flanged shaft enclosing tube of 200 mm. dia. x 2180 mm long , 6/8 mm. thickness having flanges on either side ( welded on inside of pipe ) with drilled and threaded 6 nos holes to suit M 20 x 50 mm bolts ( as per sample.). Complete Job.

Reconditioning of C.I. stuffing box by way of rebuilding reconditioning of deformed holes of flanged ends to std. size. P/f of new std. size nitride compressed rubber bush. Extraction of old broken studs, rethreading, tapping the oversize holes and fitting of 2 Nos. studs with nut washers. Also rebuilding the worn out portion of leaded bronze gland bracket and turning grinding finishing to true size. Complete Job.

Reconditioning of M.S. deflector tube 200 mm dia. 2.315 m long by way of cutting removing of damaged flanged ends. Fitting welding on each end of the new fabricated flanges as per sample specifications. Also repair to the under size fins of the deflector tube by way of welding, patching at worn out places to attain reqd. shape and size specifications. Straightening, aligning the tube and facing the ends as per proper alignment. Complete job includes cutting of approximately one and a half feet damaged piece of pipe from the worn out/ damaged thread side and fabricating and welding with proper alignment the new piece of pipe with thread as per sample. Complete Job.

Rebuilding/Reconditioning of 200 mm dia. E.R.W shaft enclosing tube by way of cutting removing of damaged flanges. Fitting welding of new fabrication of flanges as per sample specification at each end of the tube and facing the end as per proper alignment. Also straightening alignment of the tube on hydraulic press.Complete Job.

Reconditioning of M.S. 500 mm diameter X 2.18 mtrs. long column pipe by way of rebuilding the worn out and under size portions at each and where guide spiders came in contact with where surface of the column pipe by re-metalling with superior quality of welding electrodes and then turning, grinding facing and alignment of the repaired portion of the pipe to true size along with rebuilding reconditioning of elongated holes of flanges to std. size, checking and removing ovality etc. Job including handling charges. Complete Job.

Reconditioning of S.S. A.I.S.I-410 or IS – 1570 carbon steel material 2.18 m long X 70 mm dia. line shaft by way of reconditioning of worn out under size portions with special S.S. welding electrodes in layers and then turning grinding, polishing, finishing of key ways. Also removing, checking, on eccentricity of line shaft bolts dial gauge at various off sets. Removing deflection/eccentricity by heat treatment or on hydraulic press. Removing of deflection on heads/ends and then again checking the alignment of shaft on Lathe machine. P/F of new fabricated A.I.S.I-410-S.S. line shaft cotter pins. Complete Job.

Providing and fitting of high tensile steel nut bolts to column assembly of 20 cusecs discharge V.T.pumping unit No 03 (i) 24mm x 120 mm bolts with washer and nut washers ( as per sample ) ( 20 nos.) (ii) 24mm x 120 mm bolts with washer and nut washers ( as per sample )( 30 nos.) (iii) 24mm x 120 mm bolts with washer and nut washers ( as per sample )( 20 nos.) (iv) 24mm x 120 mm bolts with washer and nut washers ( as per sample )( 30 nos.) (v) 24mm x 120 mm bolts with washer and nut washers ( as per sample )( 30 nos.)

Assembling of each column assembly one by one external and internal 500 mm dia. X 200 mm dia. X 70 mm dia. line shafts in sequence and lowering into the pit along with assembled bowl assembly. This incl. fitting/lowering of five Nos. line shafts, guide spiders, muff couplings, top shaft tension/deflector tube & column pipes. Jointing of discharge surging head with delivery pipe 500 mm dia. along with P/F of relevant jointing material F.F. sheet, graphite grease packing 16 mm2. Placing of base frame on box plate. Fitting, tightening. Complete Job.

(a)Testing, commissioning of pumping unit No. 03 including installation of 300 K.W / 400 H.P 6.6 K.V H.T B.H.E.L make solid shaft motor skirt by fitting motor half coupling with pump half coupling. Fitting of cable connections of the motor (stator and rotor) L.R.S commutator assembly, space heater sealing box, cleaning of carbon brushes, proper alignment/adjustment of column assembly. Checking panel wire connections and running motor for complete, re commissioning of pumping unit . Complete Job. 1 job (b) Providing and fitting of 16mm x 180mm high tensile steel coupling bolts with nut washer. ( 6 nos.) (c) Providing and fitting of 16mm x 65mm high tensile steel coupling L-key bolts with washer ( 6 nos.)

Shifting, transportation (to & fro) of the bowl assembly 2-stage Jyoti make V.T. pump no 03 along with some fast moving damaged components of column assembly from L.I.S. Rajal to workshop Jammu for repair, reconditioning and from Jammu workshop to L.I.S. Rajal after repair, reconditioning. Job includes loading, unloading, handling charges at both ends and hire charges of truck as well as cost of fuel and lubricants used by the vehicle. Complete Job.

TRIKUTA ELECTRICAL AND MECHANICAL WORKS

BEE AAR ENTERPRISES