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2-59

2.3.1 Symbols

Filter

Regulator

Pressure gauge

Check valve c

Gas supply connector

Pressure relief valve

Flowmeter

Flow control valve

Pressure switch

Flow restrictor

2.3.2 Gas Supply Subsystem

The gas supply subsystem is mainly used to provide fresh gas for the patient and drive gas for the

anesthesia ventilator. It consists of the gas inlet assembly, cylinder yoke assembly, ACGO

assembly, O2 flush assembly, and system switch assembly.

2.3.2.1 Gas Inlet Assembly

The gas inlet assembly provides three gases for the anesthesia machine: O2, N2O, and air. Three

types of gas inlet assemblies are available based on different types of gases: O2 inlet assembly,

N2O inlet assembly, and air inlet assembly. The main configuration difference lies in that the O2

inlet assembly is equipped with a gas supply pressure switch and the O2 and air inlet assemblies

each are equipped with a pressure regulating valve. The following figure shows the pneumatic

diagram of the gas inlet assembly based on different configurations and types:

Mindray A8 Service Manual

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