Performance Analysis of Single-Disc and Multi-Disc Check Valve

Abstract

The check valve performs the function of protecting the pump from abnormal conditions in the piping system. The pressure variation caused by water hammer can be obtained using the Joukosky equation. The multi-disc check valve is closed by the weight of the main disc and the sub discs, so the bottleneck of the fluid outlets prevents water hammer. We reproduced the water hammer phenomenon in the constructed test equipment. The test confirmed that when the water hammer is applied to the check valve, the pressure of the multi-disc check valve rises less than that of the single-disc check valve. During the multiple-disc check valve test, there was no leakage in the leak test, thedifferential pressure was measured (0.02 ~ 0.18) bar in the pressure drop test, and the working pressure for the minimum working pressure test was measured at 0 bar.