procurement for set of carb clad coated seat and disc (gate) of 200 nb branch segregating valve (bsv) installed at ahp of 2x660 mw, stage-ii, sstpp, mppgcl, dongalia , set of carb coated seat and disc(gate) for 200 nb branch segregating valve (as per indure drg no.-i-5036-m-eq-sm-16 & assy. no.- a-128-rs 1. micro hardness for gate plate >1400hvn carb coat & micro hardness for seat plat-e >660hvn carb coat. 2. carb clad coat >500um on functional surfaces on both side with < 1ra surface finish 3. geometrical dimensional tolerances as per oem specification 4. base material seat: h&t grade steel (moc-alloy cs-250 bhn min) 5. slide gate/disc (moc-alloy ci-250 bhn min) ss grade 420 6. severe abrasion & erosion resistance 7. assured service life: 12 months (01 set=02 seat + 01 disc/gate)