How precise can piezoelectric valves be? - A deep dive into the technical characteristics of piezoelectric valves.

**How accurate can a piezoelectric valve be? - A deep dive into the technical characteristics of piezoelectric valves**

In modern industrial and technological fields, the precision and reliability of fluid control systems are crucial. Piezoelectric valves, as an advanced valve controller, are widely used in various fluid control systems due to their high precision, fast response, and energy-saving environmental features. This article will explore the technical characteristics of piezoelectric valves, particularly their precision performance, to help readers better understand and choose this high-performance valve controller.

### 1. Basic Principles and Structure of Piezoelectric Valves

A piezoelectric valve is a valve controller that works using the piezoelectric effect. The piezoelectric effect refers to the phenomenon where certain crystals generate electric charges when subjected to external forces, and conversely, these crystals deform when a voltage is applied. Piezoelectric valves utilize this principle to control the opening and closing of the valve by applying voltage, thereby achieving precise control of fluid flow.

Piezoelectric valves typically consist of piezoelectric ceramic sheets, valve bodies, valve cores, and driving circuits. The piezoelectric ceramic sheet is the core component of the piezoelectric valve, capable of converting electrical energy into mechanical energy to drive the valve core's movement, thus changing the valve's opening. The valve body and valve core form the channel for the fluid, regulating the fluid flow through the movement of the valve core. The driving circuit is responsible for providing the appropriate voltage signal to the piezoelectric ceramic sheet to achieve precise control of the valve.

### 2. Precision Performance of Piezoelectric Valves

Piezoelectric valves are known for their high precision, capable of achieving micrometer-level control of valve opening and closing. This feature gives piezoelectric valves a significant advantage in situations requiring precise flow control. For example, in high-precision chemical analyzers, piezoelectric valves can accurately control the amount of reagent added, achieving accurate analysis.

The precision of piezoelectric valves is typically assessed through flow control resolution. Flow control resolution refers to the minimum flow change that the valve can stably control. The higher the resolution, the stronger the valve's control capability over the flow, and the higher the precision. Some high-performance piezoelectric valves can achieve flow control resolutions at the micrometer level or even higher, fully meeting the demands for high-precision fluid control.

### 3. Other Technical Characteristics of Piezoelectric Valves

In addition to high precision, piezoelectric valves also possess many other noteworthy technical characteristics:

1. **Fast Response**: The response time of piezoelectric valves is typically in the millisecond or even microsecond range, allowing them to complete valve opening and closing actions in a very short time, meeting the needs of high-speed fluid control.

2. **Energy-saving and Environmentally Friendly**: Piezoelectric valves do not require large amounts of energy during operation, and they do not produce mechanical wear or noise pollution, aligning with modern industrial requirements for energy conservation and environmental protection.

3. **Long Lifespan and Stability**: Since piezoelectric valves do not have mechanical connections or easily damaged components like servo motors, they have a longer lifespan and stable, reliable performance.

4. **Compact Size**: Piezoelectric valves are typically small in size, making them easy to install and maintain, suitable for spaces with limited room.

5. **Easy Remote Control**: Piezoelectric valves can be remotely controlled through driving circuits, facilitating automation and intelligent control.

### 4. How to Choose the Right Piezoelectric Valve

When selecting a piezoelectric valve, it is essential to consider the following factors based on the specific application scenario and requirements:

1. **Flow Range**: Clearly define the required fluid flow range for the application scenario and choose a piezoelectric valve that can meet the minimum and maximum flow requirements.

2. **Flow Control Precision**: Choose a piezoelectric valve with appropriate flow control precision based on the requirements for flow accuracy. Generally, this can be assessed by checking the flow control resolution in the product manual.

3. **Working Pressure**: Consider the working pressure requirements of the application scenario and select a piezoelectric valve that can withstand the corresponding pressure.

4. **Fast Response Requirements:**