Modular Desiccant Air Dryer
A trusted modular heatless desiccant air dryer manufacturer and supplier in China, delivering compact, scalable, and reliable solutions for industrial compressed air systems.
Modular heatless desiccant air dryers are designed to efficiently remove moisture from compressed air or gas streams using high-performance desiccant materials. By adsorbing water vapor from the air, these dryers deliver a stable supply of clean and dry compressed air for industrial applications.
Unlike traditional single-unit dryers, modular desiccant air dryers feature a flexible, scalable design that allows multiple modules to be added or replaced as air demand changes. This makes them an ideal solution for operations requiring compact installation, future expansion, and simplified maintenance.
With a heatless regeneration process that relies on purge air instead of external heaters, modular heatless dryers offer a straightforward, energy-efficient drying solution for applications demanding continuous operation and reliable moisture control.
Advanced Refrigerated & Adsorption Drying Systems
The refrigerated drying system features an optimized heat-exchange design, high-precision refrigeration components, and automatic temperature-based capacity control to improve cooling efficiency while reducing compressor power consumption.
The adsorption drying system uses high-performance desiccant and an optimized adsorption cycle to enhance moisture removal, improve adsorption efficiency, and achieve an ultra-low pressure dew point.
Integrated Design
The compact integrated design saves installation space and simplifies setup. Each unit is manufactured under strict quality control and thoroughly tested before shipment to ensure reliable operation and consistent performance.
Energy Saving: Pre-drying reduces the moisture load on the adsorption system, lowering regeneration air consumption and extending desiccant life while maintaining a consistently low pressure dew point.
Efficient Dual Drying System: Optimized refrigeration and adsorption technologies provide efficient moisture removal, lower compressor power consumption, and ultra-low pressure dew point performance.
Integrated Design: Compact, easy to install, and manufactured under strict quality control. Each unit is thoroughly tested before shipment for reliable and consistent operation.
Energy Efficient:Low regeneration air consumption of only 5–8%.
Stable Performance:High-quality desiccant is carefully selected to ensure reliable performance and a stable pressure dew point.
Cost-Effective:A full-capacity standby unit can be configured at relatively low cost, while maintenance and servicing costs remain low.
Clean Air & Long Service Life:All surfaces in contact with compressed air are treated with an anti-corrosion oxidation process, effectively preventing secondary contamination of the treated air. This makes the unit particularly suitable for food and pharmaceutical applications, with a service life of up to 30 years.
No Annual Pressure Vessel Inspection Required:The unit is not classified as a pressure vessel subject to mandatory special-equipment inspection and therefore does not require annual pressure vessel reinspection.*
Compact Modular Construction:The integrated structure is manufactured from aerospace-grade magnesium-aluminum extruded alloy, providing a compact and robust design. The unit can pass through standard doorways, making it suitable for installation in a wide variety of locations.
Lingyu M Series modular heatless desiccant air dryers combine Pressure Swing Adsorption (PSA) with a compact modular structure for applications requiring low pressure dew points, flexible installation, and scalable compressed air capacity.
Compared with conventional twin-tower heatless dryers, the modular architecture makes it easier to expand capacity, configure standby units, and service individual modules.
The M Series covers airflow capacities from 1.5 to 55 m³/min (approximately 53 to 1,942 CFM) with an average regeneration air consumption of 5–8%.
The M Series uses multiple adsorption chambers that alternate between drying and regeneration.
During adsorption, wet compressed air enters the active module and passes through the desiccant bed, where water vapor is adsorbed before dry compressed air flows downstream.
During regeneration, a portion of the dried compressed air is expanded and directed through the saturated module to remove adsorbed moisture.
The system automatically switches between adsorption and regeneration groups to maintain continuous dry air delivery without an external regeneration heater.
| Parameter | Specification |
|---|---|
| Capacity | 1.5–55 m³/min |
| Approx. capacity | 53–1,942 CFM |
| Rated inlet pressure | 0.7 MPa |
| Operating pressure | 0.6–1.0 MPa |
| Rated inlet temperature | 10–30°C |
| Maximum inlet temperature | ≤40°C |
| Inlet pressure dew point | ≤15°C |
| Outlet pressure dew point | ≤-20°C |
| Optional pressure dew point | ≤-40°C |
| Regeneration air consumption | 5–8% |
| Desiccant | Activated alumina + high-performance molecular sieve |
| Rated ambient temperature | 35°C |
| Ambient operating range | 2–45°C |
For capacities above 55 m³/min or special operating conditions, model configuration should be confirmed according to project requirements.
The M Series is available in multiple standard capacities:
1.5 · 2.5 · 3.8 · 6.5 · 10.5 · 13.5 · 17 · 21.5 · 25 · 28.5 · 37 · 41.5 · 50 · 55 m³/min
The modular architecture allows system capacity to be configured according to current compressed air demand while leaving room for future expansion.
This can be particularly useful when:
Expansion capability should be considered during the initial design of manifolds, controls, piping, and available installation space.
For critical compressed air systems, modular dryers can be configured with additional standby capacity.
A typical N+1 configuration uses the number of modules required for normal airflow plus one additional module as reserve capacity.
For example:
4 required modules + 1 standby module = N+1 configuration
This can allow the system to maintain dry-air capacity while one module is being serviced, provided the complete dryer, manifold, control system, and airflow capacity are designed for redundancy.
The M Series can therefore be considered for applications where maintenance flexibility and compressed air continuity are more important than the lowest initial equipment cost.
The modular structure provides easier access to individual adsorption sections compared with a large conventional pressure-vessel arrangement.
Depending on the system configuration, maintenance can include:
The M Series also uses a compact integrated structure, helping reduce installation footprint and simplify equipment access in space-limited compressor rooms.
| Factor | Modular Heatless | Conventional Heatless |
| Drying technology | PSA | PSA |
| Regeneration | Dry purge air | Dry purge air |
| Purge air | 5–8% | Typically higher depending on series |
| Standard capacity | 1.5–55 m³/min | Wider high-flow range available |
| Capacity expansion | Flexible | More limited |
| N+1 redundancy | Easier to configure | Usually requires separate standby dryer |
| Footprint | Compact / modular | Twin-tower arrangement |
| Maintenance flexibility | Higher | More dependent on complete dryer |
| Installation | Flexible | Conventional |
| Best suited for | Space-limited, expandable or redundant systems | Fixed-capacity systems |
A modular dryer is not necessarily the best option for every installation.
For high-flow systems with fixed capacity and no redundancy requirement, a conventional heatless or heated desiccant dryer may provide a simpler solution.
For systems where scalability, compact installation, maintenance access, or redundancy are priorities, modular architecture provides clear advantages.
The M Series provides a standard outlet pressure dew point of ≤-20°C, with ≤-40°C available as an option.
It uses approximately 5–8% regeneration air, lower than the 8–14% average specified for Lingyu conventional CH / HH heatless series.
For example, at 50 m³/min inlet airflow:
Purge air has already been compressed, so it should be included when evaluating total system airflow and operating cost.
Key parameters include:
For applications requiring ≤-40°C PDP, confirm the optional low-dew-point configuration when selecting the model.
For systems approaching or exceeding 55 m³/min, conventional heatless, externally heated, blower-heated, or HOC configurations should also be evaluated according to airflow and operating-cost requirements.
The standard M Series covers 1.5 to 55 m³/min, approximately 53 to 1,942 CFM.
The standard outlet pressure dew point is ≤-20°C, with ≤-40°C available as an option.
The M Series specifies regeneration air consumption of approximately 5–8% under applicable operating conditions.
Yes, where the system is designed for expansion. Manifold capacity, controls, piping, installation space, and the future number of modules should be considered during the initial design.
Yes, a modular system can be designed with additional standby capacity. The exact N+1 configuration should be engineered according to the required system airflow and module capacity.
The technical specification lists activated alumina combined with high-performance molecular sieve.
No. 22-1 to 22-3, Jinzhu Road, Heting Town, Heshan City, Jiangmen City, Guangdong Province
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