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XD Heat of Compression Dryers

Regeneration of a Heat of Compression (H.O.C) dryer is accomplished by using the heat created by the compressor to regenerate the desiccant, therefore no additional energy is required for the process resulting in cost savings. Industries that require an oil free process, such as the food industry, find the best solution in a Delair™ XD dryer.

The Delair XD desiccant dryers are designed for compressed air and gas applications requiring very low dew points combined with precise process control. Engineered for demanding industrial environments, the XD range delivers stable drying performance even under fluctuating load and ambient conditions. By combining advanced adsorption technology with controlled regeneration, XD dryers are well suited for applications where air quality directly impacts equipment reliability, process stability, and product integrity.

Advanced Adsorption Drying Concept

XD dryers operate on a twin‑tower adsorption principle, where one vessel actively dries the air or gas while the second undergoes regeneration. This configuration ensures continuous operation and stable outlet conditions. The system design allows precise control of drying and regeneration phases, supporting consistent moisture removal across a wide operating range. The adsorption process is optimized to maintain low dew points without compromising system reliability or operational safety.

Consistent Low and Very Low Dew Point Performance

The XD series is engineered to achieve very low pressure dew points, making it suitable for critical applications where moisture must be minimized to prevent corrosion, freezing, or process disturbances. Carefully selected desiccant media and optimized airflow paths ensure repeatable drying performance. This level of control supports industries with stringent air or gas quality requirements, including process manufacturing and specialized industrial installations.

Controlled Regeneration and Operational Stability

Regeneration in XD dryers is designed to ensure complete and repeatable desiccant drying, supporting long service life and stable performance over time. The regeneration process is carefully controlled to avoid thermal or mechanical stress on system components. This approach enhances operational stability and allows XD dryers to perform reliably in continuous or high‑duty applications where deviations in air quality are not acceptable.

Industrial Design and Integration Flexibility

XD dryers are built using robust pressure vessels and industrial‑grade components, ensuring durability in harsh operating environments. The system layout supports straightforward integration into new or existing compressed air or gas treatment installations. Designed for compatibility with upstream and downstream equipment, XD dryers can be configured to meet specific process requirements while maintaining predictable maintenance intervals.

  • Twin‑tower desiccant adsorption design
  • Continuous drying operation
  • Very low pressure dew point capability
  • High‑performance desiccant media
  • Controlled regeneration process
  • Stable operation under variable load conditions
  • Industrial‑grade valves and components
  • Robust pressure vessel construction
  • Designed for critical air and gas applications
  • Flexible integration into industrial systems
  • Dryer type: Desiccant compressed air / gas dryer
  • Drying principle: Twin‑tower adsorption (PSA)
  • Pressure dew point: Down to −70 °C PDP (model‑dependent)
  • Regeneration method: Controlled regeneration process (configuration‑dependent)
  • Operating pressure: 4 to 16 bar(g)
  • Design pressure: Up to 25 bar(g) (model‑dependent)
  • Inlet temperature: +5 °C to +50 °C
  • Ambient temperature: +5 °C to +40 °C
  • Flow capacity: Approx. 10 to 5,000 Nm³/h (model range)
  • Desiccant type: Activated alumina / molecular sieve (application‑dependent)
  • Valve actuation: Pneumatic or electric (configuration‑dependent)
  • Power supply: Required for control and regeneration systems
  • Installation: Downstream of compressors and filtration systems
  • Maintenance interval: Desiccant replacement typically every 3–5 years, depending on operating conditions

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FAQs

XD dryers are designed for applications requiring very low and stable pressure dew points combined with precise control of the drying process. Compared to standard desiccant dryers, the XD range offers enhanced regeneration control and performance stability, making it suitable for more demanding industrial and process‑critical environments.