The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support Mechanicsburg, is soliciting proposals for the procurement of check valves under the solicitation titled "VALVE, CHECK." The contract will require manufacturers to adhere to strict quality assurance standards, including ISO 9001 compliance, and to ensure that the valves are free from mercury contamination, as they will be used in submarines and surface ships. This procurement is critical for maintaining operational readiness and safety in naval operations, with contracts expected to be awarded under the Defense Priorities and Allocations System (DPAS) for national defense purposes. Interested vendors should direct inquiries to Seana M. Steiner at 717-605-6561 or via email at SEANA.M.STEINER.CIV@US.NAVY.MIL, and must comply with all specified requirements and deadlines outlined in the solicitation.