3/2 roller valve

Pneumatic components

← All pneumatic components

Symbol

3/2 roller valve symbol with its parts named

What it does

A moving part presses the roller: air flows from port 1 to port 2. Often it is a piston rod.

Released: the spring pushes the valve back. Air in port 2 escapes through port 3.

On the kit
3/2 roller valve, as it is on the kit

Key words

3/2 valve
A valve with 3 ports and 2 positions.
Actuator
The part that works the valve.
Port
A numbered hole where a pipe joins.
Signal
Air sent to make the next part work.
Mechanical
Worked by a moving part.

Print the A3 poster (PDF)

Sources & credits: Symbols drawn to ISO 1219, as used in N5 Engineering Science. Kit drawings by R Stewart, from the Matrix CP2080 kit. Full site credits are on the credits page. R Stewart - October 2026