Hydraulic balance valve Excavator hydraulic cylinder valve core CBIA-LHN

Classification of relief valves

    According to the structure and function of the relief valve, it can be divided into the following types:
Pressure relief valve
The pressure relief valve is mainly used to limit the maximum pressure in the hydraulic system. When the pressure in the hydraulic system exceeds
When the preset value is set, the spool will open the overflow port, and the pressure exceeding the preset value will be discharged through the overflow port. Commonly used in systems
It is necessary to protect the highest pressure of the hydraulic components to avoid damage to the hydraulic components due to excessive hydraulic pressure occasions
Constant flow relief valve
Constant flow relief valve is mainly used to limit liquid flow and prevent excessive flow in the hydraulic system from damaging hydraulic components. When the flow in the system exceeds the preset value, the spool will open the overflow port, and the flow exceeding the preset value will be discharged through the overflow port. It is often used in systems where fluid flow needs to be limited, such as injection molding machines, cutting machines and hydraulic presses
Let's wait.
Two-position relief valve
Two-position relief valve is a manually adjustable relief valve, by manually rotating the adjustment device, you can change the preload of the valve core. According to the different preload force, the spool will automatically open or close the overflow port, thus realizing the pressure or flow limit in the hydraulic system. It is often used in situations where manual control of pressure or flow is required.
Sum up
The relief valve is a common hydraulic control element, mainly used to limit or regulate the maximum pressure in the hydraulic system. Its working principle is through the automatic opening and closing of the spool, which will exceed the preset hydraulic pressure or flow row
In addition to the system, thus protecting the hydraulic components from high pressure or flow damage.
Different types of relief valves are used in different hydraulic system occasions, and their working performance and parameters are also different. For the hydraulic system design and maintenance personnel, the correct selection and regulation of the relief valve is very important.