Time delay

Pneumatic components

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Symbol

Time delay symbol with its parts named

What it does

Air flows slowly through the restrictor into the reservoir.

The pressure builds up. When it is high enough, the air switches the valve.

Turn the screw to change the delay.

On the kit
Time delay, as it is on the kit

Key words

Time delay
A wait before the valve works.
Reservoir
A tank that fills with air.
Pressure
How hard the air pushes. Measured in bar.
Adjust
Turn the restrictor screw to change the delay.

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