Presolicitation DEPT OF DEFENSE DEPT OF THE NAVY is seeking ASSEMBLY, VALVE, IN REPAIR/MODIFICATION OF. This item is typically used for repairing or modifying valves. The procurement requires engineering source approval to maintain the quality of the part. The approved source(s) retain data rights, manufacturing/repair knowledge, or technical data that are not economically available to the Government. Interested persons may identify their interest and capability to satisfy the Government's requirement with a commercial item within 15 days of this notice.