Excavator accessories unloading valve 723-40-56800 relief valve

The function and working principle of the unloading valve
Load relief valve is a kind of key equipment widely used in fluid system construction, maintenance and operation repair.
It is mainly used to control the pressure level of the fluid system, effectively reduce the load of the system and improve the work efficiency.
The unloading valve is mainly composed of an end cover, a core, a rotating part and other components, which can control the pressure or flow of the regulated medium according to needs. By adjusting the opening of the core, the pressure or throttling of the system is adjusted to ensure the safe, reliable and economical operation of the system.

In addition, the unloading valve also has a protection mechanism, when the system pressure exceeds the preset value, the unloading valve will automatically open, so that the system pressure is kept within the set range, to avoid the occurrence of pressure over the boundary or even explosion.
In fact, the key step to realize fluid control of unloading valve is the interaction between components such as spring and blade
Yes. When the pressure in the system exceeds a preset value, the core is compressed, causing the clamping pin to push outward, thus forming a pneumatic piston of the moving part of the core, which moves the core, opens the valve, and allows the medium to flow out, reducing the system pressure below the set value.

On the other hand, when the pressure of the system is lower than the preset value, the reverse spring will restore the core to its original position and weight
The new stack disc closes the valve so that the system pressure does not fall below the preset value.
Therefore, the unloading valve can effectively protect the fluid system from damage by adjusting the flow and pressure of the medium
Bad, so as to improve the reliability and economic operation of the whole system.