Check valves, also known as Non-Return Valves, allow fluid to flow in only one direction. They automatically prevent backflow without manual operation. These valves protect pumps, compressors, and pipelines from damage caused by reverse flow. Check valves are widely used in water supply, oil, gas, and chemical pipelines. They operate based on fluid pressure and flow direction. Available in swing, lift, and spring-loaded designs, they suit different applications. Check valves ensure system safety and efficiency. Their simple mechanism ensures reliable performance with minimal maintenance.