refurbishment and destaging of hpbfp ( model-fk6d30 ) at ntpc faridabad , refurbishment and destaging of hpbfp , bfp ( <=110mw# ) -oh , mandatory spares for hpbfp destaging , impeller wear rings , impeller wear rings neck , wearing ring for diffuser , ring section wear ring , o ring & back up ring , balance drum , balancing drum restriction bush , floating seal , oil guard de & nde ( 02 halves ) 1 set-03 no , journal bearing de & nde , locking screws , dowel pins , balance drum lock nut & lock washer , optional spares for hpbfp destaging , oil thrower de & nde ( 1 set-03 nos . ) , coupling nut , thrust collar nut , spring disc , air breather , copper coated gasket , abutment rings ( 01 set=05 nos . ) , thrust pads ( 1set-16 nos . ) , thrust collar