الفهرس 
Computational Fluid Dynamics
CHECK VALVE SUGGESTED MODIFICATIONSOnly 14 pages are availabe for public view
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Abstract
When a check valve closes, its disc slams on the valve seat, this slam may cause many problems like noise, vibration and seat wear. The main reason of slam problem is the great hydrodynamic force acting on the valve disc near and at closing position. In order to reduce the impact force between the valve disc and its seat when closing, some modifications are applied to the valve disc geometry to reduce the drag force acting on it by the system moving back flow and consequently decrease the impact force.