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Process Gas Dryers

Delair has extensive experience providing gas dryer packages for specific applications by means of specific adsorption technology designed fit for purpose for your project.

Delair process gas dryers are engineered for applications where precise moisture control is essential to process stability, safety, and product quality. In many industrial and process environments, even trace levels of water vapor can trigger corrosion, chemical reactions, freezing, or measurement deviations. Delair addresses these risks with adsorption‑based drying solutions designed specifically for process gases and demanding operating conditions. By combining proven drying principles with robust industrial construction, Delair process gas dryers support reliable, long‑term operation in continuous and mission‑critical applications.

Engineered Drying for Process‑Critical Applications

Unlike standard compressed air dryers, process gas dryers are designed to operate with defined gas compositions, pressures, and purity requirements. Delair systems are engineered to maintain controlled outlet dew points regardless of variations in inlet conditions or flow demand. This ensures stable downstream processes and protects sensitive equipment such as reactors, analyzers, pipelines, and storage systems. Precise moisture control reduces process variability and supports consistent production outcomes across a wide range of industrial environments.

Adsorption Technology and Regeneration Concepts

Delair process gas dryers are based on adsorption drying technology, using high‑performance desiccant media to remove water vapor from the gas stream. Twin‑tower configurations allow continuous operation, with one vessel in drying mode while the second undergoes regeneration. Depending on application requirements, regeneration can be configured using different methods, including purge gas or externally supported regeneration concepts. This flexibility allows the drying system to be optimized for energy efficiency, gas availability, and required dew point performance.

Very Low Dew Point Performance

Many process gas applications require very low and stable dew points to prevent condensation, chemical instability, or safety hazards. Delair process gas dryers are designed to achieve dew points suitable for critical industrial and process installations. Optimized airflow distribution and controlled regeneration cycles ensure repeatable drying performance over long operating periods.This level of performance is essential in applications where moisture ingress can compromise both equipment integrity and process reliability.

Industrial Design and System Integration

Process gas dryers from Delair are built using industrial‑grade pressure vessels, valves, and control components, selected for durability and compatibility with process environments. Systems are designed for integration into dedicated gas treatment lines, whether as part of new installations or retrofits of existing processes. Clear system architecture and defined operating principles support safe operation, straightforward commissioning, and predictable maintenance planning over the equipment lifecycle.

  • Adsorption‑based process gas drying
  • Twin‑tower continuous operation
  • Very low pressure dew point capability
  • Controlled regeneration concepts
  • High‑performance desiccant media
  • Stable operation under variable process conditions
  • Industrial‑grade mechanical components
  • Robust pressure vessel construction
  • Designed for critical process environments
  • Flexible system configuration
  • Dryer type: Process gas desiccant dryer
  • Drying principle: Twin‑tower adsorption (PSA)
  • Pressure dew point range: −40 °C to −70 °C PDP (application‑dependent)
  • Operating pressure: Typically 4 to 25 bar(g)
  • Design pressure: Up to 40 bar(g) (model‑dependent)
  • Flow capacity: Approx. 5 to 8,000 Nm³/h
  • Inlet gas temperature: +5 °C to +50 °C
  • Ambient temperature: +5 °C to +40 °C
  • Desiccant types: Activated alumina, molecular sieve, application‑specific media
  • Regeneration methods: Purge gas or externally supported regeneration
  • Power supply: Required for control and regeneration systems
  • Installation: Dedicated process gas treatment lines
  • Maintenance interval: Desiccant replacement typically every 3–5 years, depending on conditions

Delair provides numerous dryers for the following applications:

  • Off-gas,
  • Regeneration Loop gas (Aromatics plant / de-coking process),
  • Flash gas,
  • Biogas (Bio-methane),
  • Hydrogen (fuel-cell technology),
  • Nitrogen,
  • CO2 dryer systems,
  • Natural gas, and many more.

Different type of drying technologies have been used, solution depending on actual process conditions, available utilities, available space and required performance of the unit. Typical technical solutions are split stream, heat regenerated and heatless technology.

Discover other gas dryers and purification products

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PDH Heatless Desiccant Dryers

The Delair™ PDH heatless dryer is suitable for use in hot climates and in the absence of high voltage power.

DB Heat Regenerated Dryers

Delair’s reliable heat regenerated dryers are a perfect solution for various industrial gas treatment applications
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XD Heat of Compression Dryer

Delair’s reliable XD H.O.C dryers are a perfect solution for various oil-free industrial processes
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Nitrogen Generation Packages

Delair NG series membrane nitrogen generation packages are suitable for a wide range of capacities and deliver nitrogen purities up to 99,5% with minimum feed air consumption.

FAQs

A process gas dryer is a drying system designed to remove moisture from industrial or process gases to a defined dew point level. Unlike standard compressed air dryers, process gas dryers are engineered for specific gas compositions, pressures, and purity requirements. They are commonly used where moisture can negatively affect chemical reactions, equipment integrity, or process safety.