Function

The crossbleed valve in the F-5 engine is the primary control valve for directing bleed air between the two engines.

The valve has to regulate the flow of hot (>500 F) compressed (~100 psi) air.
The valve system operates across the full range of engine compartment temperatures in a high vibration, high noise environment.
The valve main cylinder contains a butterfly valve flap that is controlled by an off-axis electric actuator.