KMC/S_D/TDPSA/15/25-26

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NUMBER #

Takeing out the damaged bellmouth by engagement of divers and necessary manpower from the sump chamber floor including arrenging lifting equipments and for necessary checking of dimensions.

Preparation of wooden pattern for casing of the C.I Bellmouth with proper guide vane angle as per sample and drawing.

Preparation of necessary mould with proper runner and riser arrangement for C.I bellmouth.

Preparation of necessary core and core boxes for hollow casting arrangement including its setting for the diffuser.

Preparation of molten metal pouring basin with necessary drag and cope half of mould.

Arrangement of raw cast iron conforming to grade FG-220 is 210-1978 for necessary casting of the bellmouth along with key slots.

Necessary fettling, dressing and chipping of cast iron bellmouth.

Machining and grinding of the cast iron bellmouth with necessary vane angle for its necessary finished dimensions.

Necessary facing & turning operation of inside and outside dia of faces of flange of bellmouth and diffuser including machining the centre bore of shaft holding boss to bring accurate dimension to match with the sample.

Making necessary sand blasting and inspection of any existance blow holes or any casting defects of newly casted bellmouth by X-ray method or any suitable method.

Boring,tapping etc at the internal stud and bolt holes along the periphery of the bellmouth hub and P.C.D of the flange with the help of special type jig & fixture on radial drill.

Casting of G.M bush for bellmouth hub for holding the impeller shaft, after preparation of necessary pattern, core box , cope and drag etc.

Fitting fixing of GM bush at the bore of bellmouth hub by introducing hydraulic pressure.

Scraping and painting with 2 coats of coal tar epoxy paint.

Fitting fixing the of new bellmouth with diffuser, pump discharge tee, coloum pipe, shaft enclosing tube including driven shaft, impeller, with allied accessories with proper alligment.Assemble, fitting fixing of the adjusting nut, racer coupling, bearing housing, T.T. nut cum packing box, pump base from its own position part by part with proper alligment including commissioning force water lubrication line, cost including initial dismantling of the same pump unit.

Transportation charge the whole unit with loading and unloading -2 way from pumping station to work shop and work shop to pumping station for necessary works.

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