Hydraulic balance valve Excavator hydraulic cylinder valve core CBDG-LJN

Relief valve is a hydraulic pressure control valve, which mainly plays the role of constant pressure relief, pressure regulation, system unloading and safety protection in hydraulic equipment. In the quantitative pump throttling regulation system, the quantitative pump provides a constant flow, when the system pressure increases, the flow demand will be reduced, at this time the relief valve is opened, so that excess flow back to the tank, to ensure that the relief valve inlet pressure, that is, the pump outlet pressure is constant. The relief valve is connected in series on the return oil circuit, and the stability of the moving parts of the back pressure of the relief valve is increased. The unloading function of the system is to connect the solenoid valve with a small overflow flow in series at the remote control port of the relief valve. When the electromagnet is energized, the remote control port of the relief valve passes through the fuel tank. At this time, the hydraulic pump is unloaded and the relief valve is used as a unloading valve. Safety protection function, when the system is working normally, the valve is closed, only when the load exceeds the specified limit, the overflow is opened, and the overload protection is performed, so that the system pressure is no longer increased.