procurement of m/s mil make s/h attemperation , r/h attemperation and steam coil air-preheater control valve spares for boiler unit 1 and 2 , 2x600 mw at stage-i , sstpp , mppgcl , dongalia , superheater spray station block valve [ tag no . sd-1 , s . n . 118265 , model no . 414x1 , 8 , ansi#2500 , cv-425 , act size: 16 double acting+hw , body gasket , seat gasket , plug stem s/a , seat ring , seal ring , flat spring , tec ring gasket with backup ring , superheater spray station control valve[ tag no . ( sd-2 , 3 , 4 &5 ) , s . n . - 118267 to 118274 , 38-414x1 , 6 , ansi#2500 , cv-260 , act size:18-8a] , body gasket , seat gasket , plug stem s/a , seat ring , cage , seal ring , yoke gasket , superheater spray station control valve [ tag no . ( sd-6 , 7 , 8 , 9 ) , 38-41421 , 4 , ansi#2500 , cv-140 , act size:18-8a] , body gasket , seat gasket , plug stem s/a , seat ring , cage , seal ring , flat spring , yoke gasket , reheater spray station control valve[ tag no . ( sd-11 , 12 , 13 &14 ) , 38-412x1 , s . n . 118289 , 2 , ansi#1500 , cv-40 , act size:13-6a2] , body gasket , seat gasket , plug stem s/a , seat ring , seal ring ( set ) , cage , yoke gasket , reheater spray station control valve[ tag no . ( sd-15 , 16 , 17&18 ) , 38-41121 , s . n . 118299 , 2 , ansi#1500 , cv-12 , act size:15-6a3] , hex head bolt m24x220 , hex head bolt m36x110 , disc washer m37 , hex head bolt m16x20 with nut and washer , socket head screw 20x55 , socket head screw 20x40 , steam coil air pre-heater ( scaph ) station control valve [ tag no . aasu-11 , s . n . 124029 , 38-41921 , 8 , asme-300 , end-asme 300 bw , cv-400 , act size:186a3] , gland packing set , body gasket , seat gasket , plug stem s/a , seat ring , seal ring ( set ) , cage , flat spring , yoke gasket