When are check valves with return springs used?
Check valves with return springs are used to ensure stable behaviour of the valve, and to prevent the disc from flapping in the flow or reduce flapping – this reduces the mechanical load, in particular, on the valve shaft and valve holder. Turbulence is reduced because the behaviour of the valve is more stable. The return spring ensures faster and more secure closure. Check valves without springs are used with low opening pressures and lower pressure drops.
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