The debris pressure cannot be higher than the pressure of the pump, unless the hydraulic press has a booster device. The actual pressure of the pump depends on the load and is automatically formed rather than adjusted. The four-column hydraulic press sets the pressure to the maximum pressure for normal operation and sets the pressure of the relief valve. Turn it down, change the throttle valve to the neutral position, etc. to seal the pump outlet, adjust the relief valve, and the pump outlet pressure rises until it reaches the required value.
In the hydraulic speed regulation system of the four-column hydraulic press, there are two commonly used speed regulation circuits, one is the speed control circuit and the other is the speed control circuit. According to the different speed regulation methods, the speed control circuit can be divided into throttling type and Volumetric type.
