AADCO 737 Series, Operating Instructions Manual, Page: 25 / 72

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11.0 PERFORMANCE SPECIFICATIONS
11.1 The AADCO 737-series pure air generators produce air with less than 0.005-
ppm hydrocarbons, carbon dioxide, methane, ozone, sulfur dioxide, hydrogen
sulfide, ammonia, and oxides of nitrogen. Carbon dioxide level is either at
ambient level (~350-ppm) or less than 0.3-ppm, depending upon the model
purification reactor selected. Dewpoint is at least -60

F; i.e., 20-ppm. See
Section 9.0 Purification Reactors.
11.2
Oxygen concentration of the output air is about 20.8% for the “A”, “C”, and “D”
purification reac
tors and 37.0% ± 0.5% for the “B” units. These respective
oxygen concentrations are determined at -60

F dewpoint and after the units
have been in operation for at least four hours.
11.3
Source air may be from the oil-less compressor normally supplied with the
instrument, suitably filtered “house” air, “plant” air, or any other source,
including cylinders.
11.4
Hydrocarbon content of the unclean input air may be as great as 500-ppm and
the methane concentration to a maximum of 0.2-ppm. For those sources
containing greater than 0.2-ppm methane, methane reactors are required.
These accessory units mount within the cabinets of all models and completely
remove all hydrocarbons, carbon monoxide, and methane by converting these
compounds to carbon dioxide and water. They are low temperature catalytic
oxidizers that, when properly installed, have effluent temperatures no greater
than 40

C. See Section 10.0 for details.
11.5
Output pressure is maintained constant within 0.05-psig through the maximum
output pressure range of each instrument without the use of ballast tanks.
11.6
All 737-series pure air generators are calibrated for purity prior to shipment.
They are standardized for output purity and oxygen concentration against a
factory standard to assure consistent performance among all pure air
generators. This standardization is performed at an input pressure and output
flow commensurate with the rated output flow of the generator being tested. To
reproduce this output purity, the generator must not exceed the maximum
permissible output flow for that unit and must have the proper input pressure
and flow for same. All compressors supplied with the 737-series pure air
generators will meet or exceed the pressure and flow requirements for the
respective units.