Maintenance kit for duplex check valve of M/ s Faiveley make to Pt. No. 790039105 for air spring suspension of EMU coaches consisting of 04 items ( i ) valve seat ( sub assly )- Component no. 039101000. Qty: 02 Nos/ set, ( ii ) Compression spring Component No. 039802000 Qty: 02Nos/ set, ( iii ) Joint ( seal )- ( 26x33x1 ) Component no. 039703000, Qty: 02Nos/ set, ( iv ) joint ( 19x33x1 ) Component No. 039704000, Qty: 01 No/ set.