MAHLE RTI NTF-515 (Rev A) - Manual (Page 5)

PROCESS PARAMETERS
The nitrogen production depends on these parameters:
Flow rate The lower the flow rate of compressed air through the hollow fiber membrane, the
more oxygen can permeate through the membrane wall. As a result, the nitrogen
produced at the outlet will have a higher purity. Nitrogen purity can be adjusted with
the flow control valve.
Temperature The NTF-515 operates at a temperature between 40-110 0 F (70-80 0 F optimally). If
the temperature increases, the pressurized air consumption will also increase. Do
not place the system in a room where the temperature may rise unnecessarily high.
Membrane
pressure Allow enough piping between the compressor exit and the NTF-515 inlet so that the
hot compressed gas has time to cool within the specifications listed in this manual.
A higher membrane pressure will increase the capacity (i.e. nitrogen output) of the
NTF-515. Pressure also enables operation of the pneumatic pressure switch.
External
pressure There must be atmospheric pressure at the outlet. The capacity and the purity of
the nitrogen gas decreases strongly if the vent pressure exceeds the atmospheric
pressure.
CLEAN SHOP AIR – PROPER FLOW & PRESSURE
Many shop air supplies have an oiler installed to provide lubrication for air tools. The life of the filters in
the NTF-515 will be increased if the shop air supply is free from moisture and oil.
Recommendation - install a separate air line without an oiler to connect to the NTF-515. If this is not
practical, consider installing a separate pre-filter before connecting the NTF-515 to limit potential
contamination to the NTF-515 filters.
Also, ensure the shop air supply meets the pressure and flow ratings stated in the NTF-515 Operation
Manual for maximum nitrogen generation.
CLEAN CHANGE
Indicator
5
6 0 -8
0 3 7
4 -0
0
... IMPORTANT ...
The condition of the Filter Element (mounted on rear of unit) can
only be checked when shop air is connected to the unit and it is in
the FILL TIRE mode of operation with Nitrogen being generated
and filling the tank. It may be necessary to press the trigger on the
fill wand to cause the tank filling. At all other times the Indicator will
not be visible.
The Filter Element must be changed when the indicator moves into
the CHANGE area and at least annually to protect the membrane
warranty.
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