This is a Navy procurement for a 4-inch ball valve used in a crucial shipboard system, designated as Special Emphasis material with strict material, testing, and certification requirements. The acquisition is a total small business set-aside and includes a classified annex, requiring offerors to hold a valid U.S. Security Clearance of Confidential or higher to access it. The valve must be manufactured to detailed NAVSEA specifications, including specific alloys and non-metallic materials, with extensive quality assurance, pressure testing, and configuration control obligations. A one-year warranty applies from delivery, and all waivers or deviations require government approval. The contract will be issued bilaterally under Emergency Acquisition Flexibilities with a DO priority rating for national defense.