VALVE,CHECK

This solicitation calls for the procurement of a 4‑inch swing check valve assembly meeting the detailed requirements of Emerson Crosby drawing DS‑B‑90380 (Revision E, Interim Change 3). The valve must be constructed from specified materials (e.g., ASTM‑B369, UNS C96400 for body and cover; QQ‑N‑286 for stud; QQ‑N‑281 for self‑locking nut) and undergo extensive testing, certification, and quality‑assurance procedures, including hydrostatic pressure testing, radiography, and traceability to material certification reports. The contract emphasizes strict compliance with numerous Navy and industry standards, mandatory use of workflow tools, and detailed documentation of all inspections, certifications, and configuration changes.