Datex-Ohmeda 7100, Technical Reference Manual

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2 Theory of Operation
1006-0836-000 02/03 2-19
2.5 Mechanical Subsystems
Refer to:
• Figure 9-3,
“Aestiva 7100 anesthesia machine pneumatic diagram,”
• Figure 9-4, “Aespire 7100 anesthesia machine pneumatic diagram,”
in section 9 for the complete pneumatic/mechanical subsystem.
The mechanical subsystem includes:
Pneumatic Engine
• Drive gas inlet filter
• Supply gas pressure regulator
• Inspiratory flow control valve
• PEEP valve; PEEP safety valve; Pressure sense switch
• Mechanical Overpressure Valve (MOPV)
• Bleed resistor
• Free breathing valve
Exhalation valve
Breathing circuit flow sensors
Bellows assembly
2.5.1 Supply Gas
Supply gas (can be selected from O
2
or Air) is supplied from the anesthesia machine
at a pressure of 241 to 690 kPa (35 to 100 psi). This supply gas is filtered through the
2-micron filter to remove any minute particles of contaminate. The filter does not
significantly lower the output pressure on the downstream side of the filter.
2-MICRON
INLINE INLET
FILTER
SUPPLY GAS
35-100 psi
Coarse side up
Smooth side up (
under plate
)
Aestiva Engine Aespire Engine