Tenders for Supply of Maintenance Kit For Levelling Valve To Ftrtil Pt.No: 790038105. As Per Annexure Consisting Of 14 Items Maintenance Kit For Duplex Check Valve Ftil Make As Per Part No: 790039105 Consisting Of Following 04 Items: 1 Valve Seat Sub-Assy, Part No. 039101000, Qty. Per Set 2 Numbers. 2 Compression Spring, Part No. 039802000, Qty. Per Set 2 Numbers. 3 Seal 26X33x1, Part No. 039703000, Qty. Per Set 2 Numbers. 4 Joint 19X33x1, Part No. 039704000, Qty. Per Set 1 Number.