At what PSI is bleed air typically regulated?

Bleed air from gas turbine engines is primarily used for various purposes such as engine starting, cabin pressurization, and environmental control systems. It is typically drawn from the high-pressure compressor stages of the engine and needs to be regulated to a specific pressure to ensure effective operation and safety.

The commonly regulated pressure for bleed air in most gas turbine engines is around 75 PSIG. This pressure is adequate for supplying the necessary airflow for pneumatic systems without overloading the components involved. It balances the performance needs while maintaining the structural integrity and operational efficiency of the systems utilizing the bleed air.

Understanding this pressure regulation is essential for technicians, as it directly impacts the functioning of various aircraft systems that rely on bleed air, making it crucial for maintenance and operational procedures in gas turbine operations.