Use a 2/2 solenoid valve to open or close one flow path, a 3/2 valve to control a single-acting cylinder or pilot signal, and a 5/2 valve to control a double-acting pneumatic actuator or cylinder.
The correct choice depends on actuator type, rest position, exhaust logic, pressure, voltage and the required safety state.
Use 2/2 valves for simple on-off flow
A 2/2 solenoid valve has one inlet and one outlet. It is used when the buyer needs to open or close a single flow path, such as water, air or oil control in a compact system.
Use 3/2 valves for single-acting cylinders and pilot signals
A 3/2 valve adds an exhaust path and is often used for single-acting cylinders or pilot air signals. Buyers should confirm normally closed or normally open logic before quoting.
Use 5/2 valves for double-acting pneumatic motion
A 5/2 solenoid valve can direct air to two working ports and exhaust the opposite side. It is commonly used for double-acting cylinders and pneumatic actuators.
RFQ details that prevent wrong selection
Send the old model, port count, port size, coil voltage, pressure, actuator type, photos and the required rest position. This helps Kailing review whether the requested valve function fits the circuit.
| Parameter | Value |
|---|---|
| 2/2 valve | Simple on-off flow path control. |
| 3/2 valve | Single-acting cylinder or pilot signal control. |
| 5/2 valve | Double-acting cylinder or pneumatic actuator control. |
| Voltage | Confirm DC 12 V, DC 24 V, AC 110 V or AC 220 V. |
| RFQ data | Port count, port size, pressure, photos, old model and actuator type. |
Frequently Asked Questions
- FAQ Is a 2/2 solenoid valve enough for a pneumatic cylinder?
Usually no for directional cylinder control. A 2/2 valve controls one flow path, while cylinders normally need exhaust and direction control. - FAQ Can a 5/2 valve control a valve actuator?
Yes. It is commonly used for double-acting pneumatic actuators when the air circuit needs two working ports and exhaust paths. - FAQ What should buyers send for valve replacement?
Send the old model, port count, port size, coil voltage, actuator type, pressure and photos of the current installation.
Need a quotation?
Send the page link, quantity, drawings and working conditions to Kailing for review.