phenomenon is termed hydraulic shock

Hydraulic system in sudden start, stop, when shifting or reversing, the sudden closure of the valve port or action suddenly stops moving parts due to the flow of liquid and the role of inertia, so that the formation of high peak instantaneous pressure in the system, this phenomenon is termed hydraulic shock. The emergence of hydraulic shock could cause greater damage to the hydraulic system, the system pressure, high speed and large flow of its more serious consequences. Therefore, when the operation to try to avoid the formation of hydraulic damper.