The Department of Defense, through the Naval Sea Systems Command (NAVSEA), is preparing to draft specifications for the MIL-DTL-23953D w/Amd 1, which pertains to Combined Vent-Check Valves for Submarine MBT Blow Lines in sizes 2.00 and 2.50 inches. This initiative aims to accommodate a variety of design solutions and processes while encouraging a broad vendor base in the industrial valve manufacturing sector. The valves are critical components in submarine systems, ensuring operational efficiency and safety. Interested parties can request copies of the draft document by emailing CommandStandards@navy.mil, with the review period concluding on January 20, 2025. Please note that this announcement is not a solicitation for bids.