Shifting, installation, testing and commissioning 100KVA voltage stabilizer at LIS Khawaskhan and repairs of 10 cusec discharge VT pump of unit-IV along with its other allied works at LIS Katal Batal.

Amount

Shifting, installation, testing and commissioning 100KVA voltage stabilizer at LIS Khawaskhan

The job involves loading of 100KVA voltage stabilizer on the mechanical transport at division store for carriage to workshop for repair and then unloading at workshop using crane, tools and tackles with the help of manual labour. Dismantling the voltage stabilizer and extracting out the coil assembly from the container, draining out the transformer oil and then cleaning the container with appropriate chemical, checking the coil assembly for its insulation, compactness and continuity. De-moisturising the transformer oil by giving a suitable heat treatment and then filtering it. Replacement of one No rotary switch of appropriate rating. Replacement of LED indicators along with internal wiring after extracting the old damaged. Dismantling of existing MCCB and cleaning of its terminals then fitting. P/F of side cover of control panel of voltage stabilizer. Lowering the coil assembly into the container and then assembling back the voltage stabilizer after complete painting, loading in the mechanical transport using tools and tackle/chain pulley block with the help of manual labour along with filtered transformer oil and fresh transformer oil 70ltrs approximately in separate container for transporting to LIS Khawaskhan. Unloading at site at road side using crane, tools and tackles with the help of manual labour. Dragging/shifting into the pump room after dismantling the side wall iron sheets of pump room for easy passage of stabilizer into the pump room. Installation of stabilizer by giving incoming and outgoing electrical connection by P/F 16mm2 copper cable 12mtrs (approximately). Filling the filtered transformer oil and fresh transformer oil in the stabilizer and testing the stabilizer on full load The job also involves dismantling of suction pipe along with foot valve of priming unit dismantling the foot valve and replacing the leather seat and 02 Nos flanges after extracting the old damaged one along with required nuts and bolts. Complete job include cost of material, carriage, fitment charges and hire charges of tools, tackles/crane and testing, fitting of dismantled iron sheets of pump room etc. complete job at site

Rebate on Old Parts

Repairs of 10 cusec discharge VT pump of unit-IV along with its other allied works at LIS Katal Batal.

Disconnecting all the electrical connections from slip ring VT motor of 120 HP and unscrewing nuts and bolts to separate the ratchet assembly from motor lifting the motor and rotor assembly with the help of existing chain pulley and gantry arrangement and dragging/shifting to side and then decoupling the flywheel of the coupling set from the top shaft of the suction line by way of unscrewing the lock nut and taking out the locking key and then lifting the flywheel with the help of manual labour. Dismantling the ratchet assembly from the discharge head by way of unscrewing the existing nuts and bolts and then lifting the ratchet assembly with the help of existing chain pulley arrangement and keeping it aside. Dismantling the discharge head from suction, delivery line and base frame and lifting/extracting it out after unscrewing the required nuts and bolts to keep it aside. Extracting the existing column assembly after unscrewing the nuts and bolts, taking out spider guide, unscrewing the line shafts from socket joints, and extracting the damaged sleeves with the help of skilled and semiskilled labour using other required tools and tackles and existing chain pulley arrangement. Extracting all the three Nos suction pipes in similar manner and then then keeping aside. Finally extracting out the damaged 10 cusec 02 stage VT pump,head load carriage of pump, line shafts, sleeves, stuffing box and socketsto road side up to loading point with the help of skilled manual labour and then loading into a mechanical transport for carrying to work shop for repairs with the help of crane/tools, tackles using manual labour. Complete job includes cost of labour, carriage charges and hire charges of tools and tackles. Dismantling the 2 stage VT pump by way of unscrewing/cutting of rusted bolts, nuts and studs and separating the suction bowl, I stage, II stage pump body and then discharge bowl to extract the damaged 1st & 2nd stage impellers, pump shaft, bushes etc. Repairs to 10 cusec VT pump by way of repairs to suction bowl by fabrication of 01 No neck ring by rebuilding, turning and then press fitting in the suction bowl. Rebuilding of intake fins and grinding. Providing/ fitting of neck ring of stainless steel material- 01 No by fabrication, turning and boring to the required size and press fitting the same in the pump bowl body and locking properly. Providing and fitting of new stainless steel pump shaft 05 feet approximately of 43mm dia and then threading, turning finishing it and making key way of required size. Fabrication of impeller holding lock ring set – 02Nos out of SS rod along with key as per sample. Repairs to 1st and 2nd stage impeller by fabrication of 01No neck ring for each impeller and then press fitting it on the impeller and locking it properly and rebuilding the worn out portion with machine able SS electrode and turning, machining it to its original shape and size. Repair to stuffing box by providing and fitting of new bronze bush as per sample to required size of precision after remetalling, finishing and drilling holes and making internal threads on stuffing box as per requirement. Repair to top shaft by way of rebuilding with machine able SS electrode at worn out portions and then threading and making key way of required size. Providing and fitting of new CI spider guide 02 Nos. along with rubber bush as per sample. Fabrication/ providing and fitting of 04 Nos bronze body bushes. Repairs to 02Nos line shaft by way of welding, turning and making threads as per sample. Providing and fitting of 02Nos sleeves by making internal threads of required size. P/F of oil packing sheet for flanges 05 Nos cut to required size. The job includes fitting of the pump using new nuts and bolts/ studs of required sizes. Complete job includes cost of material and labour charges at workshop. Loading the repaired pump along with line shafts into the mechanical transport using crane/tools, tackles with the help of manual labour at work shop. Unloading the same at road site at LIS Katal Batal using crane/tools, tackles with the help of manual labour. Carriage to the site of installation through head load using tools and tackles with the help of skilled labour. Lowering down the pump into the sump by connecting the line shaft by P/F socket02 Nos and suction pipes by P/F of new nuts, bolts and rubber sheet joint of required sizes one by one after ensuring proper alignment. Fitting of discharge head and connecting it to delivery line by P/F rubber sheet joint and required nuts, bolts of appropriate size Mounting the motor after assembling the ratchet, coupling flywheel assembly on the base frame by way of connecting it with line shaft and by P/F of gland packing, grease, and rubber sheet joint cut to required size. The complete job includes cost of material, carriage, fitment charge and testing on full load at site. The job also involve the plugging of leakage in manifold by way of cutting the worn out end plate of manifold of apprx 14” dia and then welding of 8mm thick sheet of same dia by providing a wider layer around the pipe. Also plugging the other weaker joint on the delivery side of all the pumping machinery by way of welding with super bond electrode. The complete job include cost of material carriage of welding and gas cutting set (to and fro), labour charge and testing complete at LIS KatalBatal. The bidders/contractors are advise to visit the site before quoting rates

Rebate on Old Parts

G S ENGINEERING WORKS

BEE AAR ENTERPRISES

NATIONAL ELECTRO-MECH COMPANY