The functions of a relief valve include the following:
1. Pressure Stabilization and Relief: In conjunction with a throttle valve, when supplied by a fixed-displacement pump, it can regulate and balance the flow rate in the hydraulic system. Excess oil flows back to the tank, achieving pressure relief under constant pressure, thus maintaining stable system pressure.
2. Safety Protection: The relief valve can prevent accidents caused by overload in the hydraulic system and machine tools. When the load exceeds the specified limit, the valve will open, providing safety protection. Typically, the set pressure of the relief valve is set 10-20% higher than the system's maximum working pressure.
3. System Unloading: Used in conjunction with a 2-position 2-way solenoid valve, the relief valve can unload the system, reducing energy consumption and system heat generation.
4. Remote Pressure Regulation: By connecting the remote control port of the relief valve to the inlet of a remote regulating valve through a pipeline, remote pressure regulation can be achieved.
5. High and Low Pressure Multi-Stage Control: Connecting the remote control port of the relief valve to several remote pressure regulating valves using a directional valve enables high and low pressure multi-stage control, meeting the control requirements of complex systems.
6. Sequence Valve Function: By modifying the return port of a pilot-operated relief valve, it can be made to function as a sequence valve, controlling the sequential operation of multiple actuators in the system.
7. Back Pressure Generation: Connecting the relief valve in series in the return oil line generates back pressure, making the movement of the actuators more balanced and stable.