Mindray A8 - Symbols; Gas Supply Subsystem

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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: