The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure 13 units of a regulating valve under the presolicitation notice titled "48--VALVE, REGULATING, SY, IN REPAIR/MODIFICATION OF." This procurement involves the National Stock Number (NSN) 7R-4820-014917835-EK, with delivery terms set to FOB Origin, and the government intends to negotiate with only one source under FAR 6.302-1. The valves are critical components used in various defense applications, and the government is open to proposals from all responsible sources within 45 days of this notice, although it is not a request for competitive proposals. Interested parties can contact Liem M. Phan at (215) 697-5722 or via email at LIEM.M.PHAN@NAVY.MIL for further details.