Swing check valves ensure media travels through a system in the intended direction and prevent backflow. Flowing media pushes the swinging disc away from the seat, opening the valve. Sudden drops in system pressure on the inlet or downstream blockages will cause media to flow backward. Backflow pressure swings the disc closed, preventing contaminants from entering the system. Inline swing check valves create a linear flow path, minimizing pressure drops and ensuring efficient flow. Y swing check valves reduce pressure drops when closed and can be serviced while connected to the system. Wafer swing check valves are compact and lightweight, suitable for weight- and space-limited applications. Wafer spring-loaded swing check valves close even at low reverse flow rates. Inline spring-loaded swing check valves close even at low reverse flow rates. Double-door check valves have two spring-loaded discs that quickly shut off media flow when backflow occurs.