e-NIT No.26 of 2023-24 dt. 09.09.2023

Amount

Replacement of worn-out components of HSC Mather & Platt make pump of unit No.1&7 having discharge 17 cusecs and hear 50.5 mtr. Decoupling of M&P make HSC pump from 450 HP slip ring type 6.6 KV HT motor and subsequently loosening the nuts, bolts, and studs of upper and lower casing. Unbolting bearing housing, upper housing of pump. Lifting and shifting shaft assembly with the help of EOT crane to suitable place. Job includes shifting the shaft assembly to workshop for repair works. Job includes dismantling all the components from the shaft such as coupling pulley, impeller, impeller rings, shaft protection sleeves, collar, spacer sleeves, sleeve nuts, O-rings, water deflector, stuffing box bushings, lantern rings, bearings at workshop etc. Improvement to damage stainless steel shaft SS 410 of the pump by rebuilding the shaft at various spots including damaged threaded portion by depositing SS material at worn-out spots by welding with SS electrodes. Turning, grinding, and finishing to required dimension and rethreading at requisite place to fit check nut and lock nuts. Removing eccentricity developed in the shaft with heat treatment and press bench. Providing and fitting of new shaft protection sleeves – 02 nos. fabricated out of stainless steel (SS-410) material as per the sample provided to the pump. Providing and fitting of spacer sleeve -02 Nos. to the pump fabricated out of SS-410 material as per the sample provided. Providing and fitting of sleeve nut to pump 04 pcs each fabricated out of SS-410 as per sample. Providing and fitting of 2 no. new lantern rings as per sample material in place of damaged one to the pump. Providing and fitting of 02 nos. new bearing 6316 ZZ of NBC/ SKF or any other standard make in place of damaged one at DE & NDE to pump. Fabrication/providing of new coupling pulley set in place of old/damaged pulley as per sample provided. Providing and fitting of new coupling bolts (as per the requirement) along with rubber bushes to the pump. Assembling all components on the shaft such as impellers collar, wearing rings, shaft protection sleeves, o- rings, spacer sleeves, chuck nut, lantern rings. Shifting back the shaft assembly to Lift Irrigation Station and then placing pump assembly in the lower casing of the pump. Providing and fitting of the gland packing set. Making proper alignment with motor fitting top cover by providing and fitting of new studs in place of damaged one. Coupling pump and motor by providing and fitting new coupling bolts with bushes and nuts. complete job includes cost of material, labour charges, transportation charges, charges of all tool and tackles required for execution of job.

M/S UK MECH AND ELECT ENGG WORKS

AAR PEE ELECTRICAL ENGINEERING WORKS