Atlas Copco has introduced a new range of low-flow membrane nitrogen generators (NGMs) with three models for low-flow N2 requirements.
The NGMs generator units consist of one or multiple membrane modules combined to achieve the nominal inlet flow, ensuring the maximum output of compressed nitrogen for the minimum input of compressed air in a wide range of operating conditions.
Dry compressed inlet air is separated into component gases by passing it through semi-permeable membranes consisting of bundles of extremely small individual hollow fibres packed into a limited space. This provides a very large membrane surface area to produce a relatively high-volume product stream. As water vapour also permeates through the membrane, the nitrogen gas stream is very dry, with dewpoints as low as -58º F.
In order to allow continuous operation, the nitrogen generators are equipped with a two-stage premium pre-filtration system to ensure an inlet air quality of [1:-:1] according to ISO 8573-1:2010. This eliminates the risk of the membrane being damaged by a low-quality compressed air supply, a poor start-up or an unexpected shut-down.