What solenoid valve is equipped with a single acting pneumatic actuator?

A single acting pneumatic actuator is a device that performs a telescopic action through the pressure of a gas source and the action of a spring. Due to its structural characteristics, single acting pneumatic actuators require specific types of solenoid valves for control to ensure their normal operation. Generally speaking, single acting pneumatic actuators are usually equipped with two position three-way solenoid valves. The following are their working principles and configuration reasons.
Double/single acting pneumatic actuator
1. Working principle of single acting pneumatic actuator
The working principle of single acting pneumatic actuators mainly relies on the coordination of cylinders and springs. When the air source enters the cylinder, the cylinder will extend or retract, and the spring is responsible for restoring the actuator to its initial position in the absence of air source. Therefore, the action of a single acting pneumatic actuator is unidirectional, and the extension of the cylinder requires an external air source, while the retraction is driven by spring force.
2. Reasons for configuring a two position three-way solenoid valve
Two position three-way solenoid valve is the most suitable type of solenoid valve for single acting pneumatic actuators. Its main function is to control the on/off of the air source, thereby achieving the extension and retraction of the cylinder.
Working principle:
*When the solenoid valve is powered on: the solenoid valve switches to a position, the air source enters one side of the cylinder, and the cylinder extends.
*When the solenoid valve is powered off: the solenoid valve switches to another position, the gas on one side of the cylinder is discharged, and the cylinder retracts under the action of the spring.
The basic function of this solenoid valve is to control the on/off of the air source and the direction of the airflow, ensuring that the cylinder can expand and contract under the action of air pressure.
3. Characteristics of two position three-way solenoid valve
*Two position three-way design: This solenoid valve has two working positions and three ports. One port is connected to the air source, and the other two ports are respectively connected to the two ports of the cylinder (intake and exhaust). The switching of the solenoid valve controls the flow of air in and out, thereby driving the action of the pneumatic actuator.
*Easy to operate: By powering on and off the electromagnetic coil, the state of the solenoid valve can be quickly switched, achieving precise control of the pneumatic actuator.
*High reliability: The two position three-way solenoid valve has high working stability and is suitable for pneumatic actuators that require simple control.
Why choose a two position three-way solenoid valve?
*Unidirectional action control: Single acting pneumatic actuators only require airflow control in one direction, and the two position three-way solenoid valve achieves this function by switching between two positions. Its structure is simple and can meet the requirements of one-way control.
*Air source control: The two position three-way solenoid valve can precisely control the connection or disconnection of the air source by switching the valve position under the control of the electromagnetic coil, thereby achieving the extension and retraction of the cylinder.
*Automatic return: When the solenoid valve is powered off, the cylinder will rely on the spring to return to its original position, which allows the equipment to automatically return to its original position even when the gas source is lost, increasing the reliability of use.

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