DuoChek dual plate wafer check valves deliver compact, lightweight, nonslam backflow prevention with independent spring loaded plates, API 594 dimensions, and Class 125 to 2500 ratings up to 88 inches. Crane NOZCHECK forged axial check valves are high performance nozzle type designs for fast reversing systems, featuring axial flow, few moving parts, quick response, spring assisted closure, minimal pressure drop, and performance up to API 15000 or Class 4500. NOZCHECK also offers cryogenic service down to minus 196 C with full cryogenic testing and zero fugitive emissions.