This 2" (DN50) Class 150 swing check valve follows BS 1868 and API 594. The body is ASTM A216 WCB cast steel. The trim is SS 316+STL Trim 12. End connections are RF flanged to ASME B16.5. It has a bolted bonnet, swing disc, and renewable seat. It works automatically to stop reverse flow. The swing disc seals well. The stainless steel trim with Stellite hardfacing resists wear and corrosion. It suits industrial pipelines that need backflow prevention under moderate pressure and temperature.