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Nitrogen generators

Nitrogen generators provide a cost efficient alternative to nitrogen cylinders or tanks. They separate the oxygen form the air resulting in pure nitrogen which is then stored to be readily available for use. There are two different methods for generating nitrogen: Membrane generators (GNM) and so called Pressure Swing Adsorption Generators (GNA) achieving purity levels of 99,5% (2.5) and 99,9995% (5.5) respectively.

FST's GNA series generators employ the »Pressure Swing Adsorption« PSA method to generate nitrogen of immensely high purity levels. Additionally, our generators provide a safe and economical alternative to other commonly used procedures.

GNA1 - GNA15
Pressure Swing Adsorption
Achievable purity
95% (1,5) - 99,9995% (5,5)
Max. volume flow 97% (7 bar)
88 m³/h
Min. / Max. operating pressure
7,5 - 10 bar
Connection
1/2"
Operating voltage
110-240 V / 50-60 Hz
GNA20 - GNA150
Pressure Swing Adsorption
Achievable purity
95% (1,5) - 99,9995% (5,5)
Max. volume flow 97% (7 bar)
886 m³/h
Min. / Max. operating pressure
7,5 - 10 bar
Connection
On request
Operating voltage
110-240 V / 50-60 Hz
GNM0,1 - GNM22
Membrane
Achievable purity
95% (1,5) - 99,5% (2,5)
Max. volume flow 99,5%
65,5 m³/h
Min. / Max. operating pressure
10 bar
Connection
1/2" - 1 1/2"
Operating voltage
240 V / 50 Hz

For higher volume flows, operating pressures and larger connections see special engineering.


Function


The GNA nitrogen generators operate according to the PSA or pressure swing principle. Incoming compressed air is fed via a pre-filter into one of the two containers filled with CMS activated carbon. In the process, the oxygen is adsorbed from the compressed air. 
During regeneration of the activated carbon, part of the nitrogen produced is taken from the generator outlet, expanded to ambient pressure and passed through the vessel to be regenerated. The expanded and extremely dry nitrogen ( < -49°C pressure dew point) extracts the stored oxygen from the activated carbon and releases it into the environment via a silencer.