MTPS-II - MI - BM – AOH / COH 2025-26 - Overhauling of HP/LP valves and control valves wherever required- 1 Overhauling of valves including dismantling, inspection, rectification of defects, if any, lapping of valve seat and disc, renewal of sealing rings/gland packing etc., cleaning of all parts, freeing of all fasteners, inspection of drive bush, bearings, etc.,renewing if necessary, assembling the valve, yoke and actuatorsa)Main steam stop valve, (18 inches) feed water main isolation valves (20 inches) 2 Overhauling of valves including dismantling, inspection, rectification of defects, if any, lapping of valve seat and disc, renewal of sealing rings/gland packing etc., cleaning of all parts, freeing of all fasteners, inspection of drive bush, bearings, etc.,renewing if necessary, assembling the valve, yoke and actuatorsb)200/250 size of valves 3 Overhauling of valves including dismantling, inspection, rectification of defects, if any, lapping of valve seat and disc, renewal of sealing rings/gland packing etc., cleaning of all parts, freeing of all fasteners, inspection of drive bush, bearings, etc.,renewing if necessary, assembling the valve, yoke and actuatorsc)150/250, 100/250 and 65/250 size of valves 4 Overhauling of valves including dismantling, inspection, rectification of defects, if any, lapping of valve seat and disc, renewal of sealing rings/gland packing etc., cleaning of all parts, freeing of all fasteners, inspection of drive bush, bearings, etc.,renewing if necessary, assembling the valve, yoke and actuatorsd)400/40 and 300/40 size of valves 5 Overhauling of valves including dismantling, inspection, rectification of defects, if any, lapping of valve seat and disc, renewal of sealing rings/gland packing etc., cleaning of all parts, freeing of all fasteners, inspection of drive bush, bearings, etc.,renewing if necessary, assembling the valve, yoke and actuatorse)250/40, 200/40, 150/40 and 100/40 size of valves 6 Overhauling of valves including dismantling, inspection, rectification of defects, if any, lapping of valve seat and disc, renewal of sealing rings/gland packing etc., cleaning of all parts, freeing of all fasteners, inspection of drive bush, bearings, etc.,renewing if necessary, assembling the valve, yoke and actuatorsf)40 mm to 50 mm size of valves 7 Overhauling of valves including dismantling, inspection, rectification of defects, if any, lapping of valve seat and disc, renewal of sealing rings/gland packing etc., cleaning of all parts, freeing of all fasteners, inspection of drive bush, bearings, etc.,renewing if necessary, assembling the valve, yoke and actuatorsg)15mm to 20mm size of valves 8 Overhauling of SH spray/LLCV including dismantling, inspection, lapping of valve seat and disc, renewal of spiral wound gasket and gland packing supporting from the next higher elevation/making temporary lifting structure etc. cleaning, freeing of all fasteners and renewing if necessary, assembling the valve and actuators. 9 Overhauling of SH / RH spray isolation (Block) valve, including dismantling, inspection, lapping of valve seat and disc, renewal of spiral wound gasket and gland packing supporting from the next higher elevation/making temporary lifting structure etc. cleaning, freeing of all fasteners and renewing if necessary, assembling the valve and actuators. 10 Dismantling of control valve, Lapping of valve seat, blue matching and assembling of the control valve and complete restoration. 11 Removal, refixing of insulation box and damaged insulation of above 100 / 250NB size valves.
