Dräger Narkomed 2B Operator's Instruction Manual page 14

Section 2
General Description
Color Coding
Gas Entry Via
Pipeline
Pipeline Pressure
Gauges
2-2
Each connection, valve, gauge, and flowmeter is labeled and color-coded
for the appropriate gas, as shown in the table below.
GAS MARKING
Air
Carbon Dioxide
Nitrous Oxide
Oxygen
Oxygen-Helium
Gas from the hospital pipelines enters the Narkomed 2B through hoses
connected to indexed pipeline inlets located on the side of the flowmeter
housing. The indexed connector system reduces the risk of delivering the
wrong gas to a patient by preventing incorrect connection of gas pipes.
The inlets include check valves, which prevent back flow leakage into
the atmosphere (when supply hoses are not connected) or into the
attached supply hoses (when reserve cylinders are in use). Each pipeline
connection is equipped with a filter to prevent foreign material from
entering the internal gas piping of the Narkomed 2B. Pipeline gases
should be supplied at 50–55 psi.
The anesthesia machine includes pipeline pressure gauges for oxygen
and nitrous oxide. On machines equipped with air, a pipeline pressure
gauge for air is also included. The gauges are located directly below their
corresponding flowmeters and flow control valves, and are labeled and
color-coded for their respective gases. Concentric scales in psi and kPa
indicate the pipeline supply pressure. A typical pressure gauge and
flowmeter arrangement is shown in the following figure.
GAS SYSTEM COLOR CODING
USA
AIR Yellow
CO Gray
2
N O Blue
2
O Green
2
O -He Brown/Green
2
Diagonal Stripes
ISO Germany
Black/White Yellow
Checkered
Gray Black
Blue Gray
White Blue
Brown/White N/A
Diagonal Stripes