procurement of various spares of air pre heaters paph and saph installed at boiler of 1x500 mw unit at sgtps mppgcl birsinghpur. , primary air heater, model no.-27.5 vim, 2000 bi-sector , static seal assembly (hot end) , static seal assembly (cold end) , retaining seal (5x160x1827) , air seal housing assembly , 90° barco swivel ball joint 1.5” 300 lbs for soot blower , finger tab for radial seal , finger tab for axial seal , guide bearing air seal assembly (consist of followings ) aluminium seal assembly (upper)-01 no. aluminium seal assembly (lower)-01 no. spring-06 nos. bolt -06 nos. nut -06 nos. lock nut-06 nos. washer -18 nos. pin -02 nos. seal ring retainer -01 no. , bypass bar assembly (one set consist of 02 nos. by pass seal bar assembly for hot end) , hot intermediate end basket support grating plates , cold end grating with support block , soot blower worm gear box , secondary air heater, model no.-30 vim, 2000 bi-sector , static seal assembly (hot end) , static seal assembly (cold end) , retaining seal , hot end bypass seal bar assembly (one set consist of 02 nos. by pass seal bar assembly) , finger tab for radial seal , finger tab for axial seal , air motor model no. ipm-400, 8:1 make: iec dusterlon , machined t-bar with fastener for he 7 ce (m16x60- 500 nos., plain washer- 500 nos.) , soot blower pipe along with nozzle assembly , guide bearing air seal assembly (consist of followings aluminium seal assembly (upper)-01 no. aluminium seal assembly (lower)-01 no. spring-06 nos. bolt -06 nos. nut -06 nos. lock nut-06 nos. washer -18 nos. pin -02 nos. seal ring retainer -01 no. , 90° barco swivel ball joint 1.5 300 lbs for soot blower , cold end grating with support block , pin rack assembly , soot blower worm gear box , other spares of aph (common for paph & saph) , complete soot blower valves (poppet valve) without actuator (sb-47 to sb-50 aph sb line isolation valve nb-50, type- dahv, operation- pneumatic) , over running clutch, size-fso 500/30 make-formspag / diado-sprag ltd. , kao wool packing (size 1x2x25) , complete u clamp of air heater door , twin nozzle with adapter for soot blower , oil seal 50 x 68 x08 mm , ht bolt (grade 8.8) m16x65 with one no. metallic self lock nut & two no. large dia. (od- 48mm )plain washer , ht hex. screw (grade 8.8) m 16x50 with one no. metallic self lock nut & two no. large dia. (od- 48mm )plain washer , ht hex. screw (grade 8.8) m 16x35 with one no. metallic self lock nut & two no. large dia. (od- 48mm )plain washer , ht hex. screw (grade 8.8) m 16x35 with one no. ht nut & two no. large dia. (od- 48mm )plain washer , ht screw (grade 8.8) m16x45 with one no. ht nut & two no. large dia. (od- 48mm ) plain washer , ht screw (grade 8.8) m16x60 with one no. ht nut & two no. large dia. (od- 48mm ) plain washer , ht screw (grade 8.8) m16x80 with one no. ht nut & two no. large dia. (od- 48mm ) plain washer , ht screw (grade 8.8) m20x90 with one no. ht nut, one no. large dia. (od- 60 mm) plain washer & two no. large dia. (od- 60 mm )machined washer