The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting quotes for the repair and modification of regulating valves, identified by NSN 4820-00-021-5577 and part number U-513150-51. Contractors are required to provide firm-fixed price or time and materials pricing along with estimated costs for the repair, adhering to strict turnaround times and quality control standards outlined in the Statement of Work. These valves are critical components in various naval applications, necessitating compliance with military specifications and quality assurance protocols. Interested contractors should direct inquiries to Michael J. Brown at 215-697-3765 or via email at MICHAEL.J.BROWN1069.CIV@US.NAVY.MIL, with proposals due by the specified deadline.