Hydraulic balance valve Excavator hydraulic cylinder valve core CBGG-LCN

Role: security protection in the system; Function: Keep system pressure stable.

Relief valve is a hydraulic pressure control valve, which mainly plays the role of constant pressure overflow, pressure regulation, system unloading and safety protection in hydraulic equipment. In the assembly or use of the relief valve, due to the damage of the O-ring seal, the combination seal ring, or the loosening of the installation screw and pipe joint, it may cause undue external leakage.

If the taper valve or the main valve core is worn too much, or the sealing surface is in poor contact, it will also cause excessive internal leakage and even affect normal operation.
The main function of the relief valve is to maintain the pressure in the system so that the pressure can be stable. When the pressure in the system exceeds a certain range, the relief valve will reduce the flow rate to ensure that the pressure in the system will not exceed the specified range, so as not to cause accidents.

Usually the direct-acting relief valve into the volume is very small, but also has a small inertia, so it is very flexible, its control opening is conical, so as long as a little move some spool shaft, you can have a larger opening.
Relief valve failure:

If when you use the excavator, there is often a pipe explosion, or after replacing the new tubing, there will be a pipe explosion, then you have to check whether the relief valve is not a problem, resulting in the relief valve can not control the pressure, resulting in frequent pipeline explosion.