US20200047185A1 Gyratory crusher hydraulic pressure
A gyratory crusher hydraulic pressure relief valve includes a hydraulic fluid vestibule arranged to be fluidly connected to a hydraulic fluid space A logic element is arranged to dump hydraulic fluid from the hydraulic fluid space which includes a plunger having a first plunger surface and a second plunger surface and a control pipe arranged for fluidly connecting the second plunger surface