"Function of solenoid valve" refer to "the process of converting electrical energy into mechanical action". In a pneumatic system, a solenoid valve are electromechanical devices that control the flow of air or process gas and are used for controlling pneumatic actuators such as cylinders, turbines (pneumatic motors), diaphragms, and tubes.

Here's how it functions:

1. Controlled Flow: A solenoid valve regulates the flow of compressed air in response to an electrical signal. When the solenoid is energized, it opens the valve, allowing air to flow through. Conversely, when the solenoid is de-energized, the valve closes, stopping the airflow.

2. On/Off Control: Solenoid valves provide binary control, meaning they can either be fully open or fully closed. This characteristic is useful for various pneumatic applications where precise control of airflow is necessary.

3. Remote Control: Since solenoid valves are actuated electrically, they can be controlled remotely using switches, relays, or programmable logic controllers (PLCs). This allows for automation and integration into larger systems.

4. Quick Response: Solenoid valves offer rapid response times, making them suitable for applications requiring fast actuation, such as in manufacturing processes, robotics, and automation.

5. Reliability: Solenoid valves are generally reliable and require minimal maintenance. They have a long service life, making them suitable for continuous operation in industrial environments.

6. Versatility: Solenoid valves come in various configurations, including 2-way, 3-way, and 4-way designs, with different port sizes and configurations. This versatility allows them to be adapted to a wide range of pneumatic systems and applications.

Overall, solenoid valves play a vital role in pneumatic systems by providing precise control over airflow, enabling automation, and ensuring efficient operation of various industrial processes.