6
USER GUIDE
NITROGEN GAS GENERATOR
GEN
2
MINI
1.8 Safe Handling
Please ensure the relevant safe engineering practices and handling procedures are employed when handling, installing and
operating this product. Ensure that the equipment is depressurized and electrically isolated prior to carrying out any of the
scheduled maintenance instructions specified within this user guide.
A suitable lifting aid must be used to minimize the risk of physical injury or damage to the product.
1.9 Technical Description
The nitrogen generator operates on the Pressure Swing Adsorption (PSA) principle to produce a continuous stream of nitrogen gas
from clean dry compressed air.
A dual chamber extruded aluminum column, filled with Carbon Molecular Sieve (CMS), is joined via an upper and lower manifold
to produce a two bed system. Compressed air enters the bottom of the ‘online’ bed and flows up through the CMS. Oxygen is
preferentially adsorbed by the CMS, allowing nitrogen to pass through.
After a pre-set time the control system automatically switches the bed to regenerative mode and oxygen is vented from the CMS. A
small portion of the outlet nitrogen gas is expanded into the bed to accelerate the regeneration. At the same instant the second bed
comes on-line and takes over the separation process.
The CMS beds alternate between online and regeneration modes to ensure continuous and uninterrupted nitrogen production.
The oxygen concentration in the nitrogen stream is monitored continuously on models fitted with an oxygen analyzer. If the outlet
concentration exceeds the required production level, the nitrogen outlet is closed and the gas is vented to atmosphere. Normal
operation will resume when the purity recovers. Various options are available for the nitrogen generator, please contact your
supplier for more information.
1.10 Site Location and Installation
When selecting an installation site for the generator , ensure the following conditions are met:
•
The site should be located indoors on a flat surface protected from weather and other harmful conditions.
•
The ambient temperature must not drop below 5°C (41°F) or exceed 50°C (122°F).
•
The installation site should be level and able to support the weight of the product.
•
Ensure sufficient space around the product, we recommend at least 1m around the generator to allow access for operation and
maintenance.
•
Take into account the noise generated when in use when considering the final location.
Due to the nature of operation there is a possibility of oxygen enrichment surrounding the generator. Ensure the area
surrounding the generator is adequately ventilated.
Once the generator has been located into position, install ball valves and the pipework ready for connection to the buffer vessel
and compressed air supply. The diameter of the pipes must be sufficient to allow unrestricted inlet air supply to the generator and
nitrogen supply to the applications. Ensure that all piping materials are suitable for the application, clean and debris free. All outlet
piping must be solid and non-porous to minimize the ingress of oxygen. When routing the pipes ensure that they are adequately
supported to prevent unnecessary strain which can lead to damage and leaks in the system. The nitrogen buffer vessel must be
rated to at least the maximum operating pressure of the system and must be fitted with a suitable drain valve, pressure gauge and
pressure relief valve.