DN150 Rubber Flap Check Valve for Water Supply Pipelines

For water supply, pump outlets, and industrial pipelines, swing check valves or resilient seated check valves are commonly recommended. It is important to consider flow velocity, pressure rating (PN10/PN16), and installation orientation. For applications requiring slow closure to prevent water hammer, slow-closing or damped check valves should be selected.

Check valves play a critical role in fire protection and pump stations by preventing backflow and protecting pumps from reverse rotation. They automatically close when forward flow stops, ensuring system safety and maintaining pressure. Resilient seated or double-door check valves are particularly popular due to their reliable sealing and low pressure drop.

Standard check valves are designed for automatic operation based on flow direction. For systems with frequent flow changes, silent check valves or spring-loaded check valves are recommended as they close quickly and quietly, reducing water hammer. High-quality designs with proper damping can handle demanding conditions effectively.

Check valves are widely used in HVAC and chilled water systems to prevent reverse flow and protect equipment such as pumps and chillers. They feature low cracking pressure, tight shutoff, and minimal pressure loss when open. Their compact design and reliable performance help maintain system efficiency and protect sensitive components from damage caused by backflow.