MAPA AIR BLEED SYSTEM

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AIR BLEED SYSTEM

COMPONENTS

Bleeding system valves engine.

Apu bleed air valve

Isolation valve

Thermal anti- ice (TAI)

Duct pressure transmitter

Starter or ingition valve

Precool control valve

Precool

How does it work?

In some engines, air may be taken from more than one location for different uses as the temperature and pressure of the air is variable dependent opon the compressor stage at which it is extracted. Bleed air typically has a temperature of 200-250 degrees c. and a pressure of approtimately 40 ps,exiting the engine pylon.

Bleed air is extracted from the compressor of the engine or Apu. The specific stage of the compressor from which the air id bled varies by engine type.

What is it?

Bleed air is the name given to the air that is "bled" from the compressor stage of an engine.it this stage the air is around 200-250°c. and at a medium -high pressure so its energy can be used to power a number of systems. Incluiding but not limited to the air conditioning.

There it is utilized for a number of functions inclusive of:

Hydraulic system rescruoir presuration

Water system pressurisation

wing and engine anti-ice systems

Engine start

Air conditioning

Pressurisation

Descriction

The design of most turbojet and turboprop engines in aircraft incorporates an air bleed system. An air purge system uses a network of ducts, valves and regulators to conduct medium to high pressure air, "bleed" from the compressor section of the (engines) and APU, to various locations within the aircraet.