What are the hazards of hydraulic shock? What measures can be taken to reduce or prevent it from occurring?

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When a hydraulic shock occurs, the pressure in the system instantly becomes several times higher than the normal pressure. Especially under conditions of high pressure and high flow rates, this can easily lead to vibration and noise in the system, as well as damage to the pipes or certain hydraulic components. This not only affects the performance of the system but also shortens its service life. It should also be noted that the high pressures resulting from pressure surges may cause certain hydraulic components (such as pressure relays) to malfunction, thereby damaging the equipment. The main way to avoid hydraulic shock is to prevent sudden changes in fluid flow velocity. Delaying the rate of speed change can effectively prevent hydraulic shock; for example, using a hydraulic directional control valve in combination with an electromagnetic directional control valve can reduce hydraulic shock, as the hydraulic directional control valve allows for a slower control of the direction change.