MID/AN/179

Transportation of the damaged Bowl assembly of the pumping unit from the site to workshop for repairs using manual labour, mechanical transport, mobile crane etc. Back shifting to site LIS Ranjan after repairs, unloading. Complete job.

Dismantling of bowl assembly by way of opening and extraction of 3no. Bowl cases, 3 No. stainless steel impellers from SS impeller (pump) shaft in sequence by removing / disengaging all nuts and bolts, lock rings, back plate of each bowl case with fabricated pullers, heavy duty tools and tackles without damaging of cast iron bowl and SS impeller. Proper stacking of each dismantled parts / components. Complete Job.

Surface preparation of impeller by way of rebuilding of all worn out portions such as impeller vanes, bore hole and keyways by way of re-metalling in layers with suitable SS welding electrodes, then machining, turning, grinding, polishing and finishing of the impeller to true/standard size and specification so as to fit on leaded bronze bearing ring with suitable clearance. Complete job.

Providing of new cast / fabricated and machined leaded bronze impeller wearing ring in reconditioned seat having proper clearances with the impeller.( as per size and specification)

Rebuilding of C.I. Bowl case by way of weldingthe damaged/ wornout portions of internal as well external surfaces of the bowl case with specified welding C.I. electrodes. Job also involves reconditioning of elongated holes of flanged ends, the pump shaft bore hole of bowl after re-metalling and turning, finishing it to true size, providing and fitting of new casing studs, Nitrile compressed rubber lined leaded bronze discharge bush in the pump shaft collar groove, providing / fitting S.S. lock plates and washers, fine grinding of bowl case with pencil grinder, rebuilding, turning, finishing to size the seat of the impeller bearing ring in each bowl case and having suitable clearances. Complete job.

Rebuilding of enlarger of C.I. Bowl case by way of weldingthe damaged/ worn out portions of internal as well external surfaces of the enlargerwith specified welding C.I. electrodes. Job also involves reconditioning of elongated holes of flanged ends, bore holes of enlarger after re-metalling and turning, finishing it to true size, providing and fitting of new casing studs, Nitrile compressed rubber lined leaded bronze discharge bush in the pump shaft collar groove, providing / fitting S.S. lock plates and washers, fine grinding of enlarger case with pencil grinder, rebuilding, turning, finishing to size the seat of the impeller bearing ring in enlarger case and having suitable clearances. Complete job.

Rebuilding of specified impeller shaft by way on under size portions by way of re-metalling in layer with suitable SS welding electrodes, then turning, grinding, polishing and finishing of the impeller shaft to true size and specification. Also straightening and aligning the shaft on hydraulic press/heat treatment, removing of deflections at ends and checking the shaft’s alignment on lathe machine, providing & fitting of new cotter pins/ keys of specified material for its proper fitment. (as per size and specification) Complete job.

Revamping of MS Strainer by way of welding of MS machined top flange having 14 nos M24 threaded holes (for adaptability & fitment to main Bowl assembly), duly provided with welded mesh for restriction of floating / suspended trash. Providing of 14 nos HT bolts of size M24 along with the strainer. Complete job

Complete assembling of the bowl assembly by way of mounting of three no’s impellers on 85 mm dia., 2850 mm long pump shaft with three no. bowl cases, one no. enlarger, one no. bell mouth, one no. stiffener in sequences at their respective places with key holding rings, back washers suitable with required allowances. Re-connecting of M.S. strainer to bowl assembly. Complete job in all respects.

Providing of all M-24 x 100 mm hexagonal headed bolts along with nuts & spring washers for assembling of column pipes @ 16 x 8 (flanged joints) -128 nos including insertion sheet to ensure water tight joints at specified pressure head.

Guru Nanak Engineering Corporation

M/S A D INDUSTRIES