e-NIT No.39 of 2023-24 dt. 14.11.2023

Amount

Maintenance/ repairs to M&P make horizontal split casing type pump of unit no. 05 having 17 Cusecs discharge, 50.5 mtr. head, installed at LIS Lakhanpur. Decoupling the pump No. 05 from 450 HP slip ring type HT motor. Unbolting the bearing housings and extracting out the damaged shaft assembly. Lifting and shifting the pump assembly with the help of the EOT crane and loading & transporting the assembly and bearing housings to the firm’s workshop. Dismantling all the components of shaft assembly 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. Repairs to the damaged stainless 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 the required dimensions and re-threading at the requisite place to fit chuck nuts. Removing the eccentricity developed in the shaft with the help of heat treatment & press bench. Providing and fitting of 02 Nos. new shaft protection sleeves and 02 Nos new spacer sleeves fabricated out of stainless steel (SS-410) material in place of the old and worn out one. The size of the sleeve should as per the sample provided. Providing and fitting of 04 Nos. new chuck nuts (02 No. each on the driving and non-driving end) fabricated out of stainless steel (SS-410) material having internal threads in place of the old and worn out ones. The size of the chuck nuts should as per the sample provided. 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 pump. Assembling all components on the shaft such as impeller, collar, casing ring, shaft protection sleeves, stuffing box bushings, ‘O’ rings, water deflector. The job also includes the dynamic balancing of the shaft at firm’s workshop and then shifting the full assembly to the pump house and unloading the same. Cleaning bearing housing properly and smoothening internal surface by way of machining it to the requisite size. P/F of new bearings in place of old one of NBC/SKF/FAG or some reputed make confirming to the requisite IS Standards at DE and NDE and greasing the bearings properly. Placing the pump assembly in the lower casing of the pump. Making proper alignment with the motor and fitting top cover by P/F of new studs/ nuts in place of damaged ones. Coupling the pump and motor by P/F of new coupling bolts with bushes and nuts. Providing and fitting of gland packing on both the DE and NDE and testing the pump set on no load as well full load full load. The complete Job includes the cost of material, labour, machining charges, transportation and other miscellaneous charges

Maintenance/ repairs of horizontal split casing type Flowmore make pump of unit no. 13 having 17 cusecs discharge, head 50.5 mtr, installed at LIS Lakhanpur. Maintenance/repair to HSC type Flowmore make pump of unit No. 13 having 17 cusecs discharge, head 50.5 mtr, installed at LIS Lakhanpur by way of decoupling the pump from 450 HP slip ring type HT motor and subsequently loosening the nuts, bolts and studs of upper and lower casing. Unbolting the bearing housings and upper housing of the pump and then extracting out the damaged shaft assembly. Lifting and shifting the pump assembly with the help of the EOT crane to a suitable place. Job includes loading & transporting the damaged shaft assembly to the firm’s workshop. Dismantling all the components of shaft assembly 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. Repairs to the damaged stainless 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 the required dimensions and re-threading at the requisite place to fit chuck nuts. Removing the eccentricity developed in the shaft with the help of heat treatment & press bench. Providing and fitting of 02 Nos. new shaft protection sleeves and 02 Nos new spacer sleeves fabricated out of stainless steel (SS-410) material in place of the old and worn out one. Providing and fitting of 01 No. new impeller ring fabricated out of stainless steel (SS-410) material. Providing and fitting of 04 Nos. new chuck nuts (02 No. each on the driving and non-driving end) fabricated out of stainless steel (SS-410) material having internal threads in place of the old and worn out ones. The size of the chuck nuts should as per the sample provided. Providing and fitting of new coupling bolts (as per the requirement) along with rubber bushes to pump. Assembling all components on the shaft such as impeller, collar, casing ring, shaft protection sleeves, stuffing box bushings, ‘O’ rings, water deflector. The job also includes the dynamic balancing of the shaft at firm’s workshop and then shifting the full assembly to the pump house and unloading the same. Cleaning bearing housing properly and smoothening internal surface by way of machining it to the requisite size. P/F of new bearings in place of old one of NBC/SKF/FAG or some reputed make confirming to the requisite IS Standards at DE and NDE and greasing the bearings properly. Placing the pump assembly in the lower casing of the pump. Making proper alignment with the motor and fitting top cover by P/F of new studs/ nuts in place of damaged ones. Coupling the pump and motor by P/F of new coupling bolts with bushes and nuts in place of damaged one. Providing and fitting of gland packing on both the DE and NDE and testing the pump set on no load as well full load full load. The complete Job includes the cost of material, labour, machining charges, transportation and other miscellaneous charges

VK Mechanical Works

M/S PERFECT ENGINEERING WORKS

JAGDEMBAY MECH ENGG WORKS