The oil filter in the circuit produces a certain resistance to the flow of the liquid, or the oil flowing through the oil filter must produce pressure drop. 100 tons hydraulic press is generally expressed by nominal working force (kN) or nominal tonnage (ton). Forging hydraulic press is mostly hydraulic press, high tonnage. In order to reduce the size of the equipment, large forging hydraulic presses are commonly used with higher pressure (about 35 mpa), and sometimes ultra-high pressure above 100 mpa is used.
Hydraulic presses for other purposes generally use a working pressure of 6 to 25 mpa. The tonnage of the hydraulic press is lower than that of the hydraulic press. Frame type hydraulic press is generally composed of three parts: the machine (main engine), power system and hydraulic control system. Hydraulic press classification valve hydraulic press, liquid hydraulic press, engineering hydraulic press. The four-column hydraulic press which is best to transfer pressure in a closed container follows PASCAL's law. The hydraulic transmission system of four-column hydraulic press is composed of power mechanism, control mechanism, executive mechanism, auxiliary mechanism and working medium.
