Atlas Copco has introduced a new range of three compact, low-cost, low-flow membrane nitrogen generators.

Atlas Copco’s new NGMs 1-3 membrane technology units offer efficient, compact and simple low-cost on-site solution for low-flow N2 requirements with benefits of minimal maintenance and operational costs.

NGMs 1-3 membrane technology unit

NGMs 1-3 membrane technology unit

Source: Atlas Copco

“The innovative design of the NGMs units provides a cost-efficient, on-demand source of nitrogen, with purities ranging from 95% up to 99.9%,” said Stef Lievens, Business Line Manager of Industrial Air at Atlas Copco Compressors UK.

“This makes them ideally suited to applications as diverse as body-shop operations and tyre inflation, R&D laboratory procedures – particularly for LSMC (liquid chromatography mass spectrometry) as well as safety blanketing in hazardous environments, and many other general industrial uses,” said Lievens.

The NGMs generator unit consists of one or multiple high-performance membrane modules that are combined to achieve the nominal inlet flow.

Dry compress inlet air is separated into component gases by passing it through semi-permeable membrane consisting of bundles of small hollow fibres packed into a limited space, providing a large membrane surface area to produce a relatively high-volume product stream.

NGMs 1-3 membrane technology units

NGMs 1-3 membrane technology unit

Source: Atlas Copco

Oxygen, water vapour and other trace gases permeate the membrane fibre and are discharged through a permeate port. Nitrogen is contained within the membrane and flows through the outlet port. As water vapour also permeates through the membrane, the nitrogen gas stream is very dry, with dewpoints as low at -50°c.

The nitrogen generators are equipped with a two-stage premium pre-filtration system to ensure an inlet air quality of [1:-:1] according to ISO8573-1:2010. Eliminating the risk of the membrane being damaged by a low-quality compressed air supply, poor start-up or unexpected shut-down.

The NGMs 1-3 generators complement Atlas Copco’s existing range of on-site gas solutions, including both nitrogen and oxygen generators.