The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support Mechanical, is soliciting proposals for the procurement of linear direct valves under the solicitation titled "48--VALVE, LINEAR, DIRECT." The contract requires the manufacturing of these valves in accordance with specified quality and design standards, with particular attention to the prohibition of mercury contamination, as these components are intended for use on submarines and surface ships. Interested vendors must demonstrate their status as authorized distributors of the original manufacturer and provide necessary documentation, including a signed letter of authorization. For further inquiries, potential bidders can contact Robert H. Langel at 717-605-3353 or via email at ROBERT.H.LANGEL.CIV@US.NAVY.MIL. The solicitation is part of a national defense priority and emphasizes compliance with various quality assurance and inspection requirements.