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Coaxial valve function

May 12,2025

Based on available information, a coaxial valve is a fluid control component that achieves precise control through a coaxial design of the valve core and valve sleeve. Its core functions mainly include the following aspects:

1. High-precision flow control:

The valve core and valve sleeve of the coaxial valve use precise coaxial matching. By adjusting the axial position of the valve core to change the flow area, fine adjustment of the fluid (liquid, gas) flow rate is achieved.

Features : Linear flow characteristics (flow rate is proportional to valve core displacement), high control accuracy, suitable for scenarios requiring stable flow (such as hydraulic systems, precision instruments, chemical processes).
Applications : In hydraulic servo systems, it can precisely control the movement speed of cylinders or motors, ensuring the stability and repeatability of mechanical actions.

2. Dynamic pressure stability:

Through internal structural design (such as a pressure feedback mechanism), the coaxial valve can respond in real-time to system pressure fluctuations and automatically adjust the opening to maintain the target pressure.

Function : Prevent pressure overload or undervoltage, protect system components (such as pumps, pipelines), and reduce vibration or noise caused by pressure fluctuations.
Scenario : In high-pressure pneumatic systems, it can stabilize the air supply pressure and ensure the reliable operation of pneumatic tools or actuators.

3. Fast response and low hysteresis:

The coaxial valve has a small valve core mass and low frictional resistance, coupled with a compact structure, enabling high-frequency response (millisecond-level action) to meet the needs of dynamic control systems.

Advantages : Suitable for scenarios requiring quick start/stop and high-speed switching (such as automated production lines, aerospace hydraulic servo motors).
Example : In the hydraulic system of an injection molding machine, a fast-response coaxial valve can precisely control the mold opening and closing speed, improving production efficiency.

4. Directional switching and multi-channel control:

Some coaxial valves are designed as multi-way valves (such as three-way, four-way valves). By shifting the valve core, the fluid flow direction is switched, achieving directional control of the actuator (such as cylinder extension/retraction, motor forward/reverse rotation).

Structure : The shoulders or grooves on the valve core correspond to the oil ports of the valve sleeve. When switching, specific passages are blocked or connected.
Applications : In the hydraulic systems of construction machinery (such as excavators and cranes), coaxial valves can control the movement direction of multiple cylinders, enabling complex mechanical operations.

5. Low leakage and high reliability:

The precise machining and sealing design of the coaxial valve (such as gap sealing, elastic sealing) result in extremely low leakage in high-pressure or high-precision scenarios, extending system life.

Materials : The valve core and valve sleeve often use wear-resistant materials (such as hardened steel, ceramics) to reduce wear and adapt to harsh working conditions (such as high temperatures, high dust environments).

Core application areas:

Coaxial valves are widely used in hydraulic systems, pneumatic control, industrial automation, aerospace, precision instruments and other fields, especially suitable for scenarios with high requirements for control accuracy, response speed, and reliability.

For more specific technical parameters or model applications, please provide further details based on the actual working conditions (such as medium type, pressure range, control method).