MAHLE RTI NTF-15 User Manual
OPERATION MANUAL
NTF-15
Nitrogen Tire Filling
Valve Stem Caps (Qty=200)
Order P/N 436075
035-81235-00 (Rev B)
RTI Technologies, Inc
10 Innovation Drive
York, PA 17402
800-468-2321
www.rtitech.com
TABLE OF CONTENTS
Pictograms .................................. 1
Health, Safety and Environmental Aspects .......... 1
Description of the NTF-15 Membrane .............. 2
Process Parameters ........................... 3
Unpack & Check Equipment ..................... 3
Safety Precautions ............................ 4
Operation ................................... 4
Testing Nitrogen Purity ......................... 6
Maintenance ................................. 7
Parts Identification ............................. 8
Flow Diagram ................................ 9
Normal Operation – Loss of Pressure
Nitrogen is generated by the NitroPro and retained in the storage
tank. Nitrogen generation stops when this tank fills to the specified
design pressure.
The pressure in the NitroPro storage tank may drop after extended
non-use (over night for example). This is normal, and is similar to
air compressors that will periodically cycle on to replenish pressure
lost in the air storage tank and attached delivery system.
Permeation through service hoses, fill nozzles, valves and other
components directly associated with nitrogen generation is to be
expected, and does not impact normal operation.
It may take a few minutes to replenish the pressure in the storage
tank to maximum next time the NitroPro is used. This is normal.
PICTOGRAMS
In this manual the following pictograms are used:
Warning
A warning shows a hazard that can cause death or serious injury. Follow the instructions.
Caution
A caution shows a danger that can cause damage to the equipment. Follow the instructions.
Warning
Risk of death due to suffocation.
Risk of fire
Oxygen-enriched air leads to an increased risk of fire in the event of contact with flammable products.
High pressure risk
Follow the instructions with respect to compressed gasses.
Instructions with respect to the environment.
HEALTH, SAFETY AND ENVIRONMENTAL ASPECTS
General
Correct use of the NTF-15 nitrogen generator is important for your personal safety and for trouble-free functioning.
Incorrect use can cause damage to the NTF-15 or can lead to incorrect gas supply to the customer’s process.
Warning
Read this manual before you start operating the NTF-15. Prevent accidents and damage.
Contact RTI if you detect a problem that you cannot solve with this manual.
Compressed air
Warning
Ensure that the feed air pressure can not exceed 190 psig.
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Nitrogen and Oxygen
The NTF-15 generates nitrogen as a product. Oxygen enriched air is released as waste.
Warning
Nitrogen can cause suffocation! Oxygen-enriched air leads to increased risk of fire in the event
of contact with flammable products. Make sure that there is adequate ventilation at all times!
Do not install the NTF-15 in an area where explosive substances may be present.
DESCRIPTION OF THE NTF-15 MEMBRANE
General
The NTF-15 separates compressed air into nitrogen and an oxygen enriched air stream. The separation system is based
on membrane technology. The compressed air comes from a central system or from a dedicated compressor.
The nitrogen produced is stored in the nitrogen storage vessel. The NTF-15 then switches on and off, depending on the
nitrogen demand.
Separation Principle
Separation Layer
Support Layer
B
Pressurized
Air Nitrogen
A C
HO,H
22
FS
A Pressurized air inlet F Fast
B Hollow fibre membrane S Slow
C Nitrogen outlet
Ambient air contains nitrogen (78.1%), oxygen (20.9%), argon (1%), carbon dioxide, water vapor and traces of other inert
gasses. Pressurized air (A) is fed through the hollow fiber membrane (B). The various air components diffuse through the
wall of the membrane.
O
2
N
2
The diffusion rate differs for the various gasses:
Oxygen and water vapor have a high diffusion rate and permeate rapidly through the membrane wall.
Nitrogen has a low diffusion rate and permeates slowly through the membrane wall.
At the exit of the membrane (C), pressurized nitrogen is released.
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