A hinged disc inside a swing check valve pivots on a pin, swinging open as forward flow pushes against it and swinging closed under its own weight or as flow reverses. Because the disc relies on gravity and back pressure rather than a spring, this design creates minimal resistance to forward flow, keeping pressure drop low across the valve in normal operation. This makes swing check valves a common pairing with pumps and compressors, where preventing backflow matters but adding unnecessary flow restriction does not.

Common Applications

• Pump discharge backflow prevention
• Compressor discharge lines
• Water and wastewater systems
• General service requiring low pressure drop check protection