procurement of spares of lp bypass hydraulic drive system of make welland and tuxhorn and spares of recirculation valves of bfp of make mil for aoh of unit no. 11, ph-iv, stps, sarni , spares parts for hydraulic drive system nbf 630 cnr (900) hydraulic diagram no. h-c-31525a-900-630 , high pressure filter element for filter pos.5 (01002833)/500/1 , low pressure filter element for pos.17 and 64 (01002831)/500/8 , oil regenerating filter element type et 718-dr-crn for pos. 65 (01040113)/500/9 , hp hydraulic hose dn 10 x 550 mm (s09201)/500/15 , hp hydraulic hose dn 20 x 1500 mm (s09203)/500/16 , hp hydraulic hose for oil cooler(s09205)/500/17 , oil regenerating filter element type pd 718-dr-crn for pos. 65 (01040114)/500/10 , radial piston pump with coupling pos no. 09 , spares of recirculation valves of make mil of bfp , gland packing set , body gasket , seat gasket , ptfe gasket , balancing seal set , plug stem s/a , seat ring , liner-spacer s/a