What size solenoid valve is indicated?

What size solenoid valve is indicated?

• A. 2/2
• B. 4/2
• C. 5/2
• D. 3/2

Answer: (D)

In pneumatics, the size of a valve is described by how many ports it has and how many positions it can switch between. A three-port, two-position valve has three ports (one for pressure supply, one to the actuator, and one exhaust) and two states (energised and de-energised). This arrangement is typical for driving a single-acting cylinder or providing a simple on/off control with a dedicated exhaust path. Because the diagram in question shows a valve with three ports and two states, the indicated size is the three/position configuration. That setup is the simplest option for a single control line with venting, whereas the other sizes imply more complex circuits (more ports for dual lines or additional exhausts) that aren’t needed here.

In pneumatics, the size of a valve is described by how many ports it has and how many positions it can switch between. A three-port, two-position valve has three ports (one for pressure supply, one to the actuator, and one exhaust) and two states (energised and de-energised). This arrangement is typical for driving a single-acting cylinder or providing a simple on/off control with a dedicated exhaust path.

Because the diagram in question shows a valve with three ports and two states, the indicated size is the three/position configuration. That setup is the simplest option for a single control line with venting, whereas the other sizes imply more complex circuits (more ports for dual lines or additional exhausts) that aren’t needed here.