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nitrogen gas generator
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.
Pairs of dual chamber extruded aluminum columns, filled with Carbon Molecular Sieve (CMS), are 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 equalization mode where the online bed pressure
is equalized with the second regenerated bed. Once equalized the online bed is switched 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 equalization 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.
