Main Relief Valve
The main relief valve is installed at the upper and lower ends of the main control valve, one on top and one on the top. This valve sets the maximum pressure when the entire hydraulic system is working. When the system pressure exceeds the set pressure of the main relief valve, the main relief valve opens the oil return tank oil circuit to overflow the hydraulic oil back to the oil tank to protect the entire hydraulic system and avoid excessive oil circuit pressure. The relief valve has two levels of setting pressure. When the pilot pressure is 0FF, the first level setting pressure is 355kg/c㎡; when the pilot pressure is 0N, the second level setting pressure is 380kg/c㎡.