procurement of valve seat and gate disc set duly carb clad coated of rotary segregating valve for ahp in 2x600 mw units at sstpp, mppgcl, dongalia procurement of valve seat and gate disc set duly carb clad coated of rotary segregating valve for ahp in 2x600 mw units at sstpp, mppgcl, dongalia , rotary segregating valve disc and seat ( set ) with duly carb clad coat ( 1 set=1 seat+1disc ) as per drawing tech specifications 1 ) micro hardness greater than 1100 hvn of carb clad coat 2 ) proprietary carb clad coat > 500 micro meter on functional surface 3 ) geometrical dimensional tolerance as per oem specs 4 ) base material - valve seat ( moc alloy ci 250 bhn min ) 5 ) base material - valve gate / disc ( moc alloy ci 250 bhn min ) 6 ) ++ severe abrasion and erosion resistance 7 ) assured service life of 12 months