purchase of spares for air preheater of unit no.10 and 11 stps sarni. purchase of spares for air preheater of unit no.10 and 11 stps sarni. , supply of spares forair preheater ( model 27.5vitm 2000 720pa ) of 2x250mw, unit no. 10 & 11, stps, sarni , adjuster pipe assembly for hot end sector plate ( out board side ) , static seal for hot end sector plates, ; ( one set = requirement for 1 aph ) , , aluminium seal ring assembly for guidetunion , taper lock bush of o / p shaftof main drive gear box , complete u clamp for air preheater , kao wool packing , packingrope of air sealing coverassembly ( guide bearing ) , packingrope of air sealing coverassembly ( support bearing ) , by pass seal bar assembly ( one set consist of 1. hot end by pass seal bar -03 nos., 2. cold end by pass seal bar -03 nos. ) , static seal for cold end sector plates, ; ( one set consist of = requirement for 1 aph ) ( static seal of both sides of sector plate considered ) , , static seal for axial seal plates, ; ( one set consist of = requirement for 1 aph ) , ) ( static seal of both sides of axial seal plate considered ) , , aluminium seal ring assembly for supporttunion , twin nozzle pipe assy with nozzle for soot blower of aph model -27.5 vitm 2000 720pa ( 01 set consist of following item ) concentric reducer 3x1.5 bw sch.40 ( 1 no ) 1.5 pipe nipple - l.105 ( 1no ) 90° adapter twin nozzle ( 1 no ) 1.5 pipe nipple - l.305 ( 2 nos ) screwed coupling ( 2 nos ) soot blower nozzle ( 2 nos )