MTPS I BM Unit IV Boiler Pressure parts AOH 2020 21 Overhauling of HP LP valves and replacement of defective valves

Amount

Charges for overhauling of valves including dismantling, inspection, rectification, lapping of valve seat and disc, renewal of sealing rings, gland packing etc. cleaning, freeing of all fasteners, inspection of drive bush, bearings, etc. and renewing if necessary, assembling the valve & actuators and commissioning.1)Main steam stop valve and 300/250 valve.

Valve of sizes 150/250, 100/250 and 65/250

Valve of sizes 250/40,200/40,150/40 & 100/40.

40 mm to 50 mm valves

15 mm to 25 mm valves

65mm ’ Y ‘type valves

Charges for overhauling of Thermal drains, WWSB Line, APH SB line control valves, RH/ SH spray control valves including dismantling, inspection, lapping of valve seat and disc, renewal of spiral wound gasket and gland packing etc. cleaning, freeing of all fasteners and renewing if necessary, assembling the valve

Charges for transportation of new/ reconditioned valves from stores to Boiler site, cutting the damaged valve and fixing the new valve in position. 1) valves of size up to 25 mm

valves of size 40 mm to 50 mm

Charges for cutting of 65/250 size valve due to passing in various system of boiler includes the charges for transportation of new valve from central stores, cutting the existing valve, edge preparation, positioning the new valve and welding with IBR quality welder including all consumables and T & Ps etc

Supply of Champion Style-54 Super metallic Compressed Asbestos Fibre joining sheet to with stand Temp 600° C, Pressure 160 kg/cm2. IS 2712/1998/Grade W1 Size : 2000 mm x 1500 mm x 3 mm thick

Pure Graphite self-Sealing ring withstand 250Ksc and Temperature 600 0C size:360 x 20 x 40 mm X 600 suitable for Unit-IV Main steam stop valve

Pure Graphite self-Sealing ring withstand 250Ksc and Temperature 600 0C size:125x100x18mm X 450 Suitable for Unit-IV 65/250 valves.

Pure Graphite self Sealing ring withstand 250Ksc and Temperature 600 0C size:115x101x14 mm X600 suitable for Unit-IV Main steam stop valve

Pure graphite gland packing ring of min 99.5% carbon to withstand pressure of 250Ksc and temperature 600 C suitable for 2” &1 ½ ‘’ valve size :76.2 X 31.5 X 12.5 mm

Pure graphite gland packing ring of min 99.5% carbon to withstand pressure of 250Ksc and temperature 600 C suitable for 2” &1 ½ ‘’ valve size :55.6 X 27 X 13 mm

Pure graphite gland packing ring of min 99.5% carbon to withstand pressure of 250Ksc and temperature 600 C suitable for 2” &1 ½ ‘’ valve size :41.3 X 17.2 X 12 mm

Spiral wound gasket SS 304 filled with Asbestos/ grafoil Size:380x340x3.2mm for HFO Filter