BALL & SEAT SET

The Navy is soliciting a Ball & Seat Set consisting of one ball valve and two mating seats for a critical shipboard system. The parts must meet stringent material, testing, and quality‑assurance requirements, including specific alloy specifications, hydrostatic and dye‑penetrant inspections, traceability, and warranty provisions. The contractor must provide certification data, maintain ISO‑9001 (or equivalent) quality systems, and adhere to extensive documentation, marking, and inspection protocols. • Required materials: SAE‑AMS‑6931 or ASTM‑B367 cast 6Al‑4V for the ball; MD71‑GG Mearthane (graphite‑filled urethane) for the seats, with defined hardness, density, tensile strength, compression‑deflection, impact, and water‑absorption limits. • Mandatory testing and certification: Hydrostatic test, dye‑penetrant inspection, NDT, surface waviness ≤0.0005 in/in, Teflon coating compliance, and full traceability to heat/lot numbers. • Quality system and documentation: ISO‑9001 (or MIL‑I‑45208), detailed OQE submissions via ECDS/WAWF, certificate of compliance, and strict configuration‑control, waiver/deviation, and engineering‑change procedures.