This DN250 (10") Class 300 swing check valve is designed to API 6D. The body is cast steel A216 WCB, and the trim is 13% Cr+HF stainless steel. End connections are RF flanged to ASME B16.5. The valve operates automatically to prevent flow reversal. The swing disc provides reliable sealing, and the stainless trim offers good corrosion resistance. It is suitable for industrial pipeline systems that require backflow prevention under medium to high pressure conditions.