supply of over hauling kit for duplex check valveover hauling kit for duplex check valve,over hauling kit for duplex check valve of m/s knorr-bremse make used in a ir spring suspension system of emu coaches, consisting of 4 (four) nos. items in set,con forming to rdsos spec. no.str-c-k-407 (rev-04), march 2023 to m/s. kbi drg./spec. no. as it em- (1) sealing ring, to m/s. kbi part no.-453890=02 nos/set, (2) o ring, to m/s.kbi part no. - a27763/26=02 nos/set, (3) toothed washer, to m/s. kbi part no.-466031=02 nos/set &(4) va lve head, to m/s. kbi part no.-a48128=02 nos/set [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]