Symbol
What it does
Exhaust is used air leaving the circuit.
It leaves through an exhaust port. On a 3/2 valve this is port 3.
A silencer makes the exhaust quieter.
Key words
- Exhaust
- Used air let out of the circuit.
- Exhaust port
- The port the used air leaves by.
- Silencer
- A fitting that makes the exhaust quieter.
Sources & credits: Symbols drawn to ISO 1219, as used in N5 Engineering Science. Drawings by R Stewart. Full site credits are on the credits page. R Stewart - October 2026