Structural principle of sequence valve（1）

Structural Principle

The inlet pressure oil acts on the lower end face of the valve core, and when the pressure is low, the valve core is at the bottom end under the action of spring force; When the hydraulic pressure exceeds the pre tightening force of the spring, the valve core moves up, the valve port opens, and the pressure oil enters the actuator through the sequence valve. The structure and principle of the sequence valve and the overflow valve are similar, but the difference is that the outlet of the sequence valve usually needs to be connected to the load, while the overflow valve directly returns to the oil tank.

 

Working Principle

According to the working principle and structure, sequential valves are divided into two types: direct acting and pilot operated; According to the pressure control method, the sequence valve can be divided into internal control and external control. A composite valve equipped with a one-way valve in the sequence valve that can pass through reverse liquid flow is called a one-way sequence valve. Generally speaking, this type of valve is commonly used.