procurement of hyd- air make valves installed in main turbine governing system, generator gas system, generator seal oil system and primary water system of 2x600mw units at sstpp, mppgcl, dongalia procurement of hyd- air make valves installed in main turbine governing system, generator gas system, generator seal oil system and primary water system of 2x600mw units at sstpp, mppgcl, dongalia , main turbine governing system valves , ball valve ( cock ) 16 blvr, 1 bsp ( f ) , material l is 2062, np 100 kg / cm2, material code- w90312310048 , generator hydrogen gas system valves and seal oil system , needle valve, nb=15, np=25 ( 2.5 n / mm2 ) , fine regulating shut-off valve ( needle type ) with nut & tail piece end connections. as per bhel material code no. w90415300959 & bhel spec no. tg 60254. rev. : 05, nominal temp. : 90-c max., sr-181113-1066, material code- w90415300959 , small size globe valve nb=8, np=25, as per bhel material code no. w90415301220 & bhel specification no.tg60266 var 03 nb 08 & drawing no.66 28 67 var 09 ss 316, , sr-220211-328, material code- w90415301220 , globe valve for gas service with flanged end connections, nb=50, np 25 kg / cm2, as per bhel material code w90414901185 & bhel spec no. tg 60171. rev : 03 , operating temp. : 85c service medium : hydrogen, carbondioxied, nitrogen, air or a mixture of these gases, sr 151911-2061, material code- w90414901185 , 3 way pressure gauge valve. as per bhel material code no. w90414902726 & as per bhel spec no. : tg 60253. rev. : 05 nominal pressure rating : 250 kg / cm². operating temp. : 100°c max.service medium: medium grade turbine oil, : medium grade turbine oil, turbine oil, test pressure : hydrostatic body - 375 kg / cm² for 3 minutes. kg / cm² for 3 minutes.for 3 minutes.hydrostatic seat - 275 kg / cm² for 3 minutes.kg / cm² for 3 minutes. for 3 minutes, material code- w90414902726 , soft seated globe valve for gas service nb= 25mm , np=25 kg / cm2with screwed end connection along with tailpiece & nut, bhel spec no. : tg 60171. rev : 03 , material code- w90414901240 , fine regulating shut-off valve ( needle type ) with nut & tail piece end connections, bhel spec no. tg 60254. rev. : 05, nb = 10, nominal pressure : 25 kg / cm2 ( 2.5 n / mm2 ) nominal temp. : 90-c max., material code- w90415300940 , generator primary water system , globe valve 50 nb sw, np 40 & 50 kg / cm2, as per bhel material code w97732684044 & as per bhel specification no. he57044 material : a 216 gr.wcb, w97732684044, 69512=230