MTPS I TM Unit II Overhauling and Flange gasket renewing of valves in Heater Drain Pegging Steam to Deaerator Condenser air Auxiliary steam and Drain Water lines and gasket renewing of valves in Unit II during COH 2024 25

Amount

Overhauling of GV 300 / 250 ATA, HO with bypass valve Dismantling the valve, cleaning all the parts, checking the seating surface, bearings, etc., Lapping gate/seat for perfect blue matching. Reassembling the valve with by new self-sealing rings and gland packing rings without any leak.

Overhauling of GV12”/150 Class and GV 10”/150 class HO Dismantling the valve, cleaning all the parts, checking the seating surface bearings and yoke bush etc, lapping the gate/ seat for perfect blue matching. Reassembling the valve with new gland packings bonnet gaskets without any leak, Checking the Actuator thrust base bearing and apply lubrication

Overhauling of GV 200 / 64, 40, 16 ATA GV 150/ 250 ATA MO Dismantling the valve, cleaning all the parts, checking the gate / seat surfaces, Lapping the gate/seat for perfect blue matching. Reassembling the valve with new self sealing ring, gland packing’s rings without any leak, Checking the Actuator thrust base bearing and apply lubrication.

Overhauling of GV 100 / 250 ATA, GV, GLV 2½” / 2500 class HO / MO. Dismantling the valve, cleaning all the parts, checking the seat / disc / gate / flop Surfaces, yoke bush etc. Lapping the gate / seat /disc / flap for perfect blue matching. Reassembling the valve with new gland packings and bonnet. Checking the Actuator thrust base bearing and apply lubrication.

Overhauling of GV 150/64, 40, 16 ATA HO, GV 6 “/ 600, 300, 150 class HO, GLV 150 /40 ATA , GLV 6 ” / 300 class HO/MO, SCNRV 200/40, 16 ATA. Dismantling the valve, cleaning all the parts, checking the seating surfaces, bearing, yoke bush etc., Lapping the gate/seat/disc/flap for perfect blue matching. Re-assembling the valve with new gland packing rings and bonnet gaskets without any leak. Checking the Actuator thrust base bearing and apply lubrication .

Overhauling of PNRV 100/250 ATA , GLV 100 / 40 , 16 ATA, GLV 4” / 600, 300 class HO / MO , SCNRV 150/ 40, 16 ATA, SRV 2.5 ” X4 ” / 300 Class ,GV 350/125 class & GV 300/125 class, SCNRV 350/125 class . Dismantling the valve, cleaning all the parts, checking the seating surfaces, bearing, yoke bush etc., Lapping the gate/seat/disc/flap for perfect blue matching. Re-assembling the valve with new gland packing rings and bonnet gaskets without any leak. Checking the Actuator thrust base bearing and apply lubrication.

Overhauling of GV 65 / 300 class , GLV / GV 50/ 64, 40 ATA, GLV 2” / 800, 1500, 2500 class HO/MO, SCNRV 100/16 ATA and GV, GLV 200/125 Class. Dismantling the valve, cleaning all the parts, checking the seating surfaces of Gate/seat/ disc/ flap, bearing yoke bushes thrust base of the actuator etc.. Lapping the seating surfaces of gate/ seat/disc / flap for perfect blue matching. Reassembling the valve with new gland packing rings and bonnet gaskets without any leak. Checking the Actuator thrust base bearing and apply lubrication.

Overhauling of Control valve 6” x 6”, 4” x 4”, 2.5”/2.5” /150, 300 class. Dismantling the valve, cleaning all the parts, checking the seating surfaces and actuator bearings. Lapping the gate / seat /flap for perfect blue matching, Reassembling the valve with new bonnet gaskets and gland packings.

Overhauling of GLV 1” / 800, 1500, 2500 Class HO/MO. Dismantling the valve, checking the seating surfaces. Cleaning all the parts. Lapping the disc with seat for perfect blue matching. Reassembling the valves with new gland packings and bonnet gaskets. Checking the Actuator thrust base bearing and apply lubrication

Changing the eroded pipe HPH Air Vent line (Orifice plate) Cutting the eroded and punctured pipes with orifice plates line HPH-5, 6 & 7 air evacuation line to FT(1) header line for a length of 400 mm removing the pipes of both sizes of the orifice plate connecting the orifice plate by welding and machining providing the pipes at both sides of the orifice plate and then with the lines by welding and replace orifice plate if necessary.

Gasket renewing for 250/300/350 mm valve, This work involves Removing the valve from line, Cleaning the flange surface on both sides, Preparation of gaskets for both ends, positioning the valve in the Line with gaskets and tightening the flange bolts & nuts.

Gasket renewing for 150/200 mm valve This work involves Removing the valve from line, Cleaning The flange surface on both sides, Preparation of gaskets for both ends, positioning the valve in the Line with gaskets and tightening the flange bolts & nuts.

Gasket renewing for 50 mm/ 40ATA/800 class valve This work involves Removing the valve from line, Cleaning The flange surface on both sides, Preparation of gaskets for both ends, positioning the valve in the Line with gaskets and tightening the flange bolts & nuts.

Gasket renewal works in 350 / 300 mm Cooling water line orifice plate flanges. This work involves dismantling the flange bolts and nuts, removing the orifice plate and differential pressure line flanges, cleaning the flange surfaces, preparing the 2 sets

Gasket renewal works in 200 / 150 mm Cooling water line orifice plate flanges. This work involves dismantling the flange bolts and nuts, removing the orifice plate and differential pressure line flanges, cleaning the flange surfaces, preparing the 2 sets of gaskets, positioning the flanges & gaskets and tightening the flange bolts & nuts.

Cutting the man hole 500 x 600 mm in the Flash Tank No.1 & 2 for easy access to inspect the inner side of FT –I and attending to cracks & welding joint leak inside the Flash Tank No.I. a) Cutting the man hole (500 x 600 mm) in the Flash Tank – I for easy access to inspect the inner side of FT-1.

b) Cleaning the Flash Tank 1 grinding the cracked portion inside the tank bottom and middle welded joint and nozzle header joints etc. as per requirement and making ‘V’ grooves and welded the portion.

c) Grinding the manhole edge of the plate and Flash Tank-1 closing the manhole and welding after cleaning the inner side of the Flash Tank-1.

Cleaning and painting: Cleaning and painting of Cooling water and Auxiliary cooling water lines in Turbine area.

Pure Graphite Die molded Gland Packing Rings to with stand a pressure of 200 Ksc and Temperature of 600oC density between 1.4 - 1.6 gm/cc and carbon content minimum 99.5 % (Full Ring) size: 41.3 – 17.2 – 12 mm for Feed water, Steam line 1” HO/MO drain line valves.

Pure Graphite Die molded Gland Packing Rings to with stand a pressure of 200 Ksc and Temperature of 600oC density between 1.4 - 1.6 gm/cc and carbon content minimum 99.5 % (Full Ring) size: 55.6 – 27 – 13.5 mm for Feed water, Steam line 2” HO/MO drain line valves.

Champion Make Style – 54 Super Non-Metallic Compressed Asbestos fiber Jointing sheet confirm to IS 2712/1998, Grade W/1, Size 2000 x 1500 x 3mm gasket for Heater drip, Auxiliary Steam ,Condenser Air and Auxiliary Cooling water line valves.

Cost of Enamel paint

Cost of welding electrodes For Item No.16,17&18 ( SA 106 Gr (7x60)Nos)

Cost of Cutting Gas for cutting the man hole in the Flash Tank No.1 and Cutting the eroded and punctured pipes with orifice plates line HPH-5, 6 & 7 air evacuation line to FT (1) header.

Consumables and T& P Charges For Item Sl.No: 1 to 19

SRI VAITHEESWARA CONSTRUCTIONS (BID ID -1161019)