procurement of spares of siemens make electropneumatic positioners installed in 2x600mw, sstpp, mppgcl, dongalia, khandwa , siemens electro pneumatic smart positioner (single acting fail freeze position detection spares) , siemens make single acting fail freeze smart positioner model 6dr5210-0en00-0af0 , position feedback transmitter: model 6dr4004-6j , gauge block with 2 gauges for single acting positioner: model c43581-a430-d80 , siemens electro pneumatic smart positioner (double acting fail freeze position detection spares) , siemens make double acting fail freeze smart positioner model - 6dr5120-0nn00-0af0 , position feedback transmitter: model 6dr4004-8j , gauge block with 3 gauges for double acting positioner: model c43581-a430-d81 , siemens pneumatic block for double acting smart positioner. model c43581-a430-d81. , siemens electropneumatic positioner (double acting fail freeze remote position detection spares) , external position detection system model 6dr4004-1es , emc filter module: model 6dr4004-8f , mother board – hart protocol – safe area , mother board – hart protocol – ex proof area , potentiometer assembly for smart positioner.