T-45C TS, ADV & IUT ENG-17
OBOGS & ECS/Pressurization System
3.
Inducer pressure regulator and shutoff valve
Overlay 3
(IPRSOV): controls airflow to the inducers
IPRSOV
a.
When the landing gear is extended, cooling air
is inducted through each heat exchanger by a
cooling air jet pump (inducer)
b.
When either the landing gear is raised or the
cockpit air conditioning system is switched off,
the inducers will shut off
(1) Inducer shutoff valve: compensates for
lack of airflow through primary and
secondary heat exchangers at slow
airspeed when gear down
4.
CAU compressor: compresses bleed air received
Overlay 4
CAU Compressor
from primary heat exchanger
Overlay 5
5.
Secondary heat exchanger: dissipates heat gained
Secondary Heat
during compression by CAU compressor
Exchanger
Overlay 6
6.
CAU turbine
CAU Turbine
a.
Further cools air received from secondary heat
exchanger by expansion through turbine
b.
Airflow through the turbine drives the CAU
compressor
7.
Temperature control valve: controls final
Overlay 7
conditioned air temperature by mixing cold air from
Temperature Control
CAU turbine with hot airflow path from MPRSOV
Valve
8.
Water extractor: reduces water content of air
Overlay 8
Water Extractor
distributed to cockpit air distribution and canopy
defog systems
a.
Water is drained to inlet duct of secondary heat
exchanger
Page 17-15
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