procurement of siemens make smart positioners for control valve installed in btg area of unit no. 3 and 4 of 2x660mw, sstpp, stage-ii, mppgcl, dongalia, khandwa/etni-ii procurement of siemens make smart positioners for control valve installed in btg area of unit no. 3 and 4 of 2x660mw, sstpp, stage-ii, mppgcl, dongalia, khandwa , sipart ps2 smart electro pneumatic positioner model no : 6dr5111-0nn00-0aa0 single action for pneumatic linear and part-turn actuators;2-wire; 4...20ma with hart-interface;single action; enclosure aluminium, small, with fixable slipping clutch, without explosion protection, connection thread el.: 1/2 npt / pneu.:1/4 npt, without limit monitor, without option module, brief instructions german / english /chinese, without mounted pressure gauge block , sipart ps2 smart electro pneumatic positioner model no : 6dr5123-0nn00-0aa0 double action for pneumatic linear and part-turn actuators;2-wire; 4...20ma with hart-interface;single action; enclosure aluminium, small, with fixable slipping clutch, without explosion protection, connection thread el.: 1/2 npt / pneu.:1/4 npt, without limit monitor, without option module, brief instructions german / english /chinese, without mounted pressure gauge block , feedback card ex model no: 6dr4004-8j , pneumatic block, single action model no: c73451-a430-d80 , pneumatic block, double action model no: c73451-a430-d81 , motherboard safe area, with hart