The "Silent" Nozzle Check Valve
The photo shown below is axial nozzle check valve, 14 Inch, Class 300 LB, RF Flange, WCB material, typical for its "silent" & non-slam characteristic.
For critical process equipment, the axial nozzle check valve is usually applied to prevent return flow or shocks, and ensure low pressure loss, stable operation and smooth dynamic behavior.
The reason of its non-slam characteristic is because the valve reacts quickly to flow changes, and makes sure that no reverse flow or shocks occurring within the pipe. In this case, it can perform well that the valves won't slam heavily and cause damage to the surrounding equipment.
For critical process equipment, the axial nozzle check valve is usually applied to prevent return flow or shocks, and ensure low pressure loss, stable operation and smooth dynamic behavior.
The reason of its non-slam characteristic is because the valve reacts quickly to flow changes, and makes sure that no reverse flow or shocks occurring within the pipe. In this case, it can perform well that the valves won't slam heavily and cause damage to the surrounding equipment.