Air reservoir

Pneumatic components

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Symbol

Air reservoir symbol with its parts named

What it does

A tank that fills with air.

It takes time to fill, so the pressure builds up slowly.

With a restrictor, it makes a time delay.

On the kit
Air reservoir, as it is on the kit

Key words

Reservoir
A tank that fills with air.
Time delay
A wait before the valve works.
Pressure
How hard the air pushes. Measured in bar.

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