VALVE,CHECK

The United States Navy is soliciting a quotation for a 4-inch swing check valve assembly in accordance with Emerson Crosby Drawing DS-B-90380. The valve must meet specific material and testing requirements, including quantitative chemical and mechanical analysis, and must be certified to meet the requirements of the procurement document. The contractor must also provide a certificate of compliance and maintain a quality system in accordance with ISO-9001. * The valve must be made from specific materials, including ASTM-B369 for the body and cover, and QQ-N-286 for the stud. * The valve must undergo various tests, including ultrasonic inspection, liquid penetrant inspection, and hydrostatic pressure testing. * The contractor must provide a certificate of compliance and maintain a quality system in accordance with ISO-9001. * The contractor must also provide a statement of tests performed and a copy of the test results. * The valve must be marked with a material symbol, manufacturer's identification symbol, and traceability marking.