Gyratory crusher hydraulic pressure relief valve

A gyratory crusher system comprising:

• a gyratory crusher;
• a hydraulic system controlling a vertical position of a vertical shaft carrying a crushing head and an inner crushing shell of the gyratory;
• and
• a gyratory crusher hydraulic pressure relief valve, the relief valve including a hydraulic fluid vestibule arranged to be fluidly connected to a hydraulic fluid space of the gyratory crusher, and a logic element arranged for dumping hydraulic fluid from the hydraulic fluid space, the logic element including a plunger having a first plunger surface fluidly connected to the hydraulic fluid in the hydraulic fluid vestibule, and a second plunger surface arranged opposite the first plunger surface, and at least one first control pipe arranged for fluidly connecting the second plunger surface to the hydraulic fluid vestibule, wherein the at least one first control pipe is provided with a first supply orifice which restricts the flow of hydraulic fluid from the vestibule towards the second plunger surface to make a time (TC) it takes for the logic element to switch from an open position to a closed position exceed a time (TF) it takes for a closed side setting position of the crusher to make one full round.