Gardner Denver GDN2-027TT Nitrogen Generator

Description Gardner Denver GDN2-027TT Nitrogen Generator

The Gardner Denver GDN2-027TT is a compact high-purity continuous nitrogen production system utilizing the PSA (Pressure Swing Adsorption) method. This technology is based on the property of Carbon Molecular Sieve (CMS) to selectively retain oxygen molecules at elevated pressure (7-10 bar), allowing nitrogen to pass through as the target product.

How does the Twin Tower configuration work?

The system consists of two adsorption columns operating in anti-phase mode. While the first column is in the adsorption phase (under 8 bar pressure, compressed air passes through the molecular sieve where oxygen, water vapor, and CO₂ remain in the adsorbent pores while nitrogen flows to the outlet), the second column is in the regeneration phase—the pressure is reduced to atmospheric, and the accumulated impurities are desorbed and vented into the atmosphere. Cycles switch every 60-90 seconds, ensuring a continuous nitrogen flow without drops in pressure or purity.

How is 99.9995% (5 ppm) purity achieved?

High-quality activated carbon CMS removes oxygen to residual concentrations of less than 5 ppm (parts per million). Additionally, the system utilizes:

• Refrigerated drying of inlet air (dew point +3°C) — eliminating moisture that could damage the adsorbent.

• Coalescing filtration — removing oil aerosols down to 0.01 mg/m³.

• Integrated oxygen analyzer — constant real-time purity monitoring.

  Result: a stable inert environment for laser cutting, MAP packaging, and electronics soldering, where even 10 ppm of oxygen leads to oxidation and defects. Economics: An in-house generator replaces 40-60 cylinders per month, reducing nitrogen costs by 60-70% and ensuring full gas supply autonomy.

Design Excellence and Reliability of the GDN2 Series

The high efficiency  is driven not only by PSA technology but also by unique engineering solutions that set this series apart from competitors:

• Spring-Loaded Adsorbent System: One of the main problems with conventional generators is the attrition of the carbon sieve due to air flow micro-vibrations. The features a continuous spring compression system for the columns. This prevents the formation of channels in the adsorbent bed and guarantees a CMS service life of up to 10 years without loss of adsorption capacity.

• Use of Corrosion-Resistant Materials: All internal piping and critical components are made of 316L stainless steel. This eliminates the risk of rust particles entering the nitrogen line, which is critical for pharmaceutical and electronic production.

• Intelligent HMI Control Panel: The generator is equipped with a 7-inch color touchscreen with an intuitive interface. The system automatically adjusts operating cycles based on gas consumption (Economy Mode function), saving up to 30% of compressor energy during low-load periods.

System Layout

The image illustrates a typical installation for uninterrupted nitrogen generation. The system consists of a compressor, an air treatment unit (filters and dryer), an air receiver, the  generator itself, and receivers for storing the finished nitrogen. This architecture guarantees stable pressure and maximum gas purity at the outlet.

Technical Performance Specifications

This data demonstrates the flexibility of the model—the lower the required purity, the higher the volume of nitrogen produced:

The generator provides a stable inert environment for industries where gas purity directly affects the quality of the end product and production costs:

• Laser Cutting and Metal Processing: Using nitrogen with 99.99%–99.999% purity under high pressure allows for the displacement of molten metal from the cut zone without thermal oxidation. This is critical for stainless steel, titanium, and aluminum, as it eliminates scale. You get a perfectly clean mirror edge, allowing for immediate transition to welding or powder coating without expensive mechanical cleaning.

• Food Industry (MAP Technology): Modified Atmosphere Packaging using nitrogen is the gold standard for storing snacks, coffee, nuts, dried fruits, and dairy products. Replacing oxygen with nitrogen stops lipid oxidation and the growth of aerobic microorganisms. This extends product shelf life by 2–4 times while preserving natural taste, texture, and aroma without chemical preservatives.

• Microelectronics and Precision Soldering: Ultra-high nitrogen purity is required for the production of printed circuit boards and soldering of SMD components. Creating an oxygen-free atmosphere in solder reflow ovens prevents the oxidation of solder paste and contact surfaces. This ensures the formation of high-quality solder joints without microcracks, guaranteeing electronic reliability in extreme conditions.

• Pharmaceuticals and Biotechnology: Nitrogen is used to create a protective "nitrogen blanket" in tanks containing raw materials and finished products. This prevents degradation of active ingredients upon contact with atmospheric oxygen and moisture. The gas is also used for sterile purging of ampoules, vials, and pipelines, ensuring the chemical stability and safety of medications.

• Petrochemical and Chemical Industries: Ensuring explosion safety through the inerting of containers with flammable substances. Purging reactors and catalyst regeneration systems with high-purity nitrogen eliminates the risk of spontaneous combustion and ensures the stability of complex chemical reactions.