Annual maintenance of 30MW Unit No.II of Giri Power House under Giri Power House Division, HPSEBL, Girinagar Distt. Sirmour(H.P.)

Dismantling of under water parts of machine i.e.adjusting rings (4 pcs), lower DT cone, upper DT cone,runner cone, runner, pivot ring, giude vanes (16 Nos), straps, levers, turn buckles, end plates, bearing bodies (16 Nos.), regulating ring, etc. and proper stacking of dismantled items in consultation with Site Engineer.

Dismantling of shaft sealing ring (2 pcs) , Sealing body (4 Pcs) , TGB tank etc. and proper stacking of dismantled items in consultation with site engineer in service bay of Unit No.2

Dismantling of thrust coolers (8 Nos), UGB coolers (8 Nos), UGB inspection windows, LGB coolers (8 Nos), TGB coolers (1 No.), stator air coolers (8 Nos), related cooling pipelines. Thorough cleaning of turbine and OPU tanks. Flushing and cleaning the above mentioned coolers by water jet. Inspecting/checking any damaged cupronickel tubes with pressure gun (4 Kg/cm2). After inspection / checking re-assembling coolers assembly by providing and fixing new permanent sheets, rubber sheets and nut & bolts. Coolers to be painted from outside with smoke grey paint and with epoxy paint from inside. Refitting the above coolers in their position after cleaning and testing. Coolers found defective shall replaced with new one (Spare coolers for replacement shall be provided by HPSEBL)

Dismantling of Thrust, LGB, UGB, TGB pads, supporting discs. DPT and UT test of thrust, UGB, LGB, TGB (testing kits / UT arrangement to be arranged by contractor). Defective pads for replacement will be provided by HPSEBL during assembly. Blue matching of TGB, UGB, LGB w.r.t respective journals. Blue matching of thrust pads with mirror disc. Assembling of UGB, LGB, TGB pads and setting their respective clearances as per OEM standards by BHEL/Ex BHEL experts. (Necessary shims to be arranged by contractor)

Repair of shaft sealing ring (2 Pcs) by welding with SS MO-309 welding electrodes throughout the periphery to meet the decreased dimensions and then machining and polishing of the same to match the original profile as per BHEL drawing at contractor workshop including transportation charges .

Repair of top cover liner by welding eroded portion with MO 309 SS electrodes and then grinding to achieve profile as per BHEL Drg. 51120200. Repair of 16 Nos. eroded holes of top cover SS liner by welding with MO 309 SS electrodes and then boring for maintaining their coaxility with guide vanes bearing bodies as per BHEL Drg.

Assembling of shaft sealing body, sealing ring, TGB tank, etc. complete in all respects including testing and commissioning. (All necessary materials used for assembling like gaskets, permanent sheets, neoprene sheets, nut bolts, welding rods, cup seals etc shall be arranged by contractor) .

Levelling, Centering, alignment (complete throw) of Unit-II so that parameters of machine should come within permissible limit as per OEM standard, complete alignment of machine and the same process shall be repeated for exciter alignment as per direction of BHEL/Ex-BHEL expert and as per entire satisfaction of Engineer-in-Charge .

Minor repair of stay vanes, regulating ring of servo motor shaft (opening side) by welding, grinding to stop oil leakage and matching as per drawing, cleaning of tracks on which regulating ring move, cleaning of rusted surfaces of regulating ring assembly of all grease, dirt, dust and foreign material by scrapping, after cleaning applying grease on regulating ring track, two coats with zinc rich primer and finally painting with two coats of Epilux 4-5 complete in all respects to the entire satisfaction of Engineer-in-Charge .

Assembling of underwater parts like pivot ring, guide vanes (16 Nos), bearing bodies (16Nos), bushes, straps, levers, turnbuckles, runner bolts, new runner (provided by HPSEBL), runner cone, upper and lower DT cone, adjusting rings, etc. (all necessary material used for assembling like gaskets, permanent sheets, neoprene sheets, nut bolts, welding rods, upper and lower cup seals etc. shall be arranged by contractor) complete in all respects

Blue matching of guide vanes among themselves, with top cover and pivot ring to bring clearances as per OEM standards and greasing of guide vanes from upper and lower side

Overhauling / Maintenance of HMC of Governor of Unit No.II of Giri Power House BHEL make as per Sr.No.7508392 by servicing of its control panels as per operational requirement by BHEL / Ex-BHEL expert complete in all repsect as per the direction of Engineer-in-charge .

Tightening of steel rope between regulating ring and master controller at zero servo motor setting, tightening of steel rope between master controller and EHT cabinet, tuning of Governor by adjusting tie rod and bolt for gap adjustment and adjustment of limiter cam shaft, adjustment of OLG motor cam shaft, feedback signal speed setting, gate setting and setting other parameters as per operational requirement by BHEL / Ex-BHEL expert complete in all respect

Repair of MIV seal (both static and dynamic), Bypass valve spear liner and Release valve disc by welding pitted / eroded portion with MO 309 welding electrodes and then grinding for making surface even. After grinding, blue matching of MIV seal (between static and dynamic), spear-liner of Bypass valve and disc of Release valve complete in all respects.

Vibration analysis and balancing of machine as per OEM norms including assistance in spinning, dry out of machine and synchronization of unit No.II of Giri Power House Girinagar.

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