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Mar 17, 2022 · Duckbill check valves are non-mechanical, require no maintenance, and do not slam when closed. They are also resistant to organic contaminants such as algae and barnacles and have no problem disposing of suspended solids entrained streams, such as abrasive slurries.
Mar 7, 2024 · Conversely, when the flow ceases or reverses, the slit naturally closes, forming a seal to prevent backflow. This inherent flexibility and self-sealing mechanism make duckbill check valves highly efficient and reliable in controlling fluid movement.
Check Valve Slam. Check valve slam occurs after pump stoppage when the system flow reverses back towards the pump before the check valve is fully closed (Figure 1). The reverse flow causes the check valve to close rapidly through the remaining portion of its travel.
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May 4, 2020 · Check Valves, also known as Non Return Valves (NRV) or One Way Valves, are automatic valves that normally allows fluid (liquid or gas) to flow through it in only one direction. Check valve open with forward flow and close against reverse flow.
May 1, 2024 · When compared to conventional check valves, duckbill valves offer several distinct advantages: Enhanced Durability. Built to withstand corrosive and abrasive conditions, they outlast many traditional check valves, reducing long-term replacement costs.
Oct 29, 2019 · When a pump stops, gravity and reverse flow slam the check valve shut. Because fluid is non-compressible, it creates a pressure or shock wave (water hammer). The fluid continues to flow back and forth until friction losses cause the wave to settle.
Cla-Val Rubber-Flex Duckbill Check Valves are designed to provide outstanding back-flow prevention; eliminating costly and unwanted back-flow from rivers, oceans, storm water, and is an excellent choice for sewage diffuser systems.
