
Air Dryer for Compressed Air: Types, Working Principles & Selection Guide
An air dryer for compressed air is an important part of an industrial compressed air treatment system. Its main purpose is to reduce water vapor
Lingyu provides industrial compressed air dryers for a wide range of airflow capacities, pressure dew points, operating conditions, and industrial applications. Our dryer range includes refrigerated air dryers and desiccant air dryers, with customized configurations available for large-flow compressed air systems.

High Processing Capacity: Handles compressed air volumes up to 1130 SCFM, ideal for large-scale systems.
Air Cooled System: Eliminates the need for water cooling infrastructure, reducing installation and operational costs.
Stable Dew Point: Maintains a reliable pressure dew point between 2–10°C (35.6–50°F), preventing condensation and corrosion.
Efficient Refrigeration Circuit: Equipped with a durable scroll or rotary compressor for low energy consumption.
User-Friendly Interface: Real-time monitoring, alarms for high temperature, and system status indicators.
Automatic Condensate Drain: Ensures consistent moisture discharge without manual intervention.
The 1130 SCFM refrigerated air dryer (air cooled) is engineered for performance, reliability, and long-term value.

Dew Point Monitoring:Real-time dew point monitoring ensures stable drying performance.
Siemens Touchscreen Control:Siemens touchscreen with RS-485 for monitoring and system integration.
Reliable Pneumatic Valves:High-performance valves with feedback control improve system reliability.
Automatic Flow Control:Automatically adapts to 30–110% load variations.
Intelligent Drainage:Automatic condensate monitoring and drainage ensure reliable operation.
Partial-/Full-Flow Operation:Seamless mode switching improves safety and reduces energy consumption.
Differential Pressure Protection:Automatic monitoring and protection help maintain continuous air supply.
Galvanized Piping:Hot-dip galvanized piping improves corrosion resistance and service life.
Skid-Mounted Design:DN150+ piping and pressure vessels are integrated into a certified skid-mounted assembly.

Flexible Communication:RS-485 standard, optional IoT connectivity.
Energy-Saving Control:EBZ200-2 control reduces energy use by over 10%.
Dew-Point Control (Optional):Load-based control saves over 30% energy.
High-Performance Desiccant:20% extra filling for stable, efficient adsorption.
Reliable Components:Premium valves and high-efficiency cooler ensure durability.
Metal Control-Air Piping:Strong, durable, and reliable.
Optimized Airflow:Improves desiccant utilization with lower pressure drop.
Smart Touchscreen Control:Siemens touchscreen for real-time operating monitoring.

High Stability:Key heat exchangers are manufactured in-house. Refrigeration compressors are mainly sourced from well-known brands such as Panasonic, Copeland, Danfoss, and Hanbell, together with high-quality refrigeration components.
High-Efficiency Moisture Separation:Equipped with an independently designed and continuously upgraded water separation system, ensuring reliable and efficient moisture removal.
Wide Operating Range:Hydrophilic aluminum foil is used, while heat exchangers and pre-coolers are standard across the entire series, ensuring reliable operation even under demanding conditions.
Intelligent Dual-Compressor Design:Models from 5 to 180 m³/min feature a 1+1 dual-compressor configuration. The second compressor automatically starts or stops according to system load, improving energy efficiency and adapting to applications with significant fluctuations in air demand.
High Customization Capability:Custom colors and optional PLC control are available. Dry contacts, Modbus communication, IoT connectivity, and other functions can also be customized to meet specific customer requirements.

High-Performance Pneumatic Valves:Reliable and highly responsive pneumatic valves ensure fast and stable switching with a long service life.
High-Efficiency Desiccant:High-performance desiccant provides excellent adsorption capacity and abrasion resistance, ensuring a stable pressure dew point during long-term operation with minimal dusting.
Intelligent Programmable Control:Equipped with a fully electronic programmable controller featuring an intuitive interface for easy operation and maintenance.
Low-Noise Operation:Low-noise check valves and high-performance silencers minimize noise throughout operation and during exhaust.
Automatic Repressurization:Before valve switching, the system automatically repressurizes and equalizes the pressure between the vessels. This ensures stable vessel pressure, minimizes pressure fluctuations and their impact on the desiccant, and helps extend desiccant service life.
Heater Pressure Protection:The heater is equipped with pressure protection to prevent dry heating, enhancing operational reliability and extending heater service life.

The compressed air first enters the pre-cooler for initial cooling, and then passes through the pre-cooling/reheating section of the high-performance 3-in-1 plate heat exchanger for further cooling. It subsequently enters the evaporator section, where it is rapidly cooled and the condensed moisture is separated.The treated low-temperature compressed air then returns to the pre-cooling/reheating heat exchanger, where it exchanges heat with the incoming hot compressed air. This reheats the dry compressed air before it is discharged from the dryer.The refrigeration system precisely adjusts the compressor speed according to changes in system load. The operating frequency is automatically regulated to match the actual air treatment demand, ensuring stable and energy-efficient operation.

Compact Capacity Range – Choose from 25, 35, or 50 CFM to match your compressor flow.
Air-Cooled Design – No water connection required; perfect for facilities without cooling water.
Stable Dew Point Control – Maintains 2–10°C (35.6–50°F) dew point for consistent dryness.
Energy Efficient – Equipped with low-power refrigeration systems for cost savings.
Automatic Drain Valve – Discharges moisture automatically.
Plug-and-Play Setup – Quick installation and operation in limited spaces.
Durable Construction – Built with powder-coated steel and corrosion-resistant components.

Fully Automatic Operation:Automatic start/stop and operating-cycle switching provide fully automated system operation.
PLC-Controlled Pneumatic Valves:Pneumatic valve switching is automatically controlled by the PLC, ensuring accurate sequencing and reliable operation.
Real-Time Nitrogen Monitoring:Nitrogen purity and flow rate are continuously monitored online in real time.
Off-Spec Nitrogen Alarm & Protection:An alarm is activated when nitrogen purity falls below the specified value. If the off-spec condition persists for a preset period, the system automatically shuts down for protection.
Automatic CMS Compaction System:Equipped with an automatic Carbon Molecular Sieve compaction device to maintain proper packing density and help prevent CMS pulverization caused by bed movement.
Digital Touchscreen Display:The digital touchscreen provides real-time display and monitoring of key operating parameters, including pressure, nitrogen purity, flow rate, and system operating status.
Energy-Efficient Pressure Equalization:An optimized unequal-pressure equalization process improves nitrogen recovery efficiency and indirectly reduces overall energy consumption by approximately 5%.

The communication can meet the user's requirements such as RS-485 (standard), IoT connection, etc.
The independently developed EBZ200-2 multi-core driver can save more than 10% of the comprehensive energy consumption compared with the fixed cycle mode;
The optional dew point energy-saving control can extend the adsorption time and reduce the comprehensive energy consumption by more than 30% under load fluctuation conditions;
Customized high-performance adsorbent, 20% filling margin;
304 stainless steel control gas pipeline, specially designed diverter, high adsorbent utilization rate, small gas pressure loss;
7-inch Siemens touch screen programmable controller, dynamic monitoring of operation process;

High Volume Capacity: Supports compressed air flow rates up to 1340 SCFM, ideal for large-scale operations.
Water Cooled System: Efficient heat removal through water circulation, reducing electrical load and improving cooling performance in hot environments.
Stable Dew Point Performance: Delivers consistent pressure dew point between 2–10°C (35.6–50°F).
Energy Efficient: Lower power consumption than air-cooled units in environments with available cooling water.
Compact Design: Smaller footprint compared to equivalent air-cooled models.
Automatic Drain System: Timely removal of condensate to prevent internal water accumulation.
Heavy-Duty Construction: Industrial-grade steel cabinet with rust-resistant finish.
The 1340 SCFM refrigerated air dryer (water cooled) is built for intensive-duty cycles and stable long-term operation.

Low energy consumption: the three-in-one plate heat exchanger is adopted, and the whole machine can save 20~30% of energy consumption;
Low pressure drop: the pressure loss of the whole machine is less than 0.015MPa, which is lower than the national standard;
Low dew point: under standard working conditions, the pressure dew point is as low as 2~10℃, and the electronic bypass valve is adopted, making the system more stable;
Environmentally friendly and durable: the whole series adopts environmentally friendly refrigerant R410a/R407C, which meets international environmental standards and has a maximum pressure of 1.6MPa;

Fully Automatic Operation:Automatic start/stop and operating-cycle switching provide fully automated system operation.
PLC-Controlled Pneumatic Valves:Pneumatic valve switching is automatically controlled by the PLC, ensuring accurate sequencing and reliable operation.
Real-Time Nitrogen Monitoring:Nitrogen purity and flow rate are continuously monitored online in real time.
Off-Spec Nitrogen Alarm & Protection:An alarm is activated when nitrogen purity falls below the specified value. If the off-spec condition persists for a preset period, the system automatically shuts down for protection.
Automatic CMS Compaction System:Equipped with an automatic Carbon Molecular Sieve compaction device to maintain proper packing density and help prevent CMS pulverization caused by bed movement.
Digital Touchscreen Display:The digital touchscreen provides real-time display and monitoring of key operating parameters, including pressure, nitrogen purity, flow rate, and system operating status.
Energy-Efficient Pressure Equalization:An optimized unequal-pressure equalization process improves nitrogen recovery efficiency and indirectly reduces overall energy consumption by approximately 5%.

Lingyu provides industrial compressed air treatment equipment for moisture removal, filtration, and on-site nitrogen generation.
Our product range includes refrigerated air dryers, desiccant air dryers, compressed air filters, and nitrogen generators for different airflow capacities, operating pressures, dew point requirements, air quality standards, and industrial applications.
Products are available in different capacities and configurations to support general manufacturing, automotive, electronics, pharmaceuticals, food processing, laser cutting, chemical processing, and other industrial compressed air applications.
A complete industrial compressed air treatment system may include air drying, filtration, condensate removal, and gas generation depending on the required pressure dew point, air quality, and application.
Lingyu provides four main product categories:
Each product category is designed for different air quality requirements and operating conditions.
Refrigerated air dryers remove moisture from compressed air by cooling the air until water vapor condenses into liquid water.
They are commonly used for general industrial compressed air systems where a stable, moderate pressure dew point is sufficient.
Refrigerated air dryers are typically selected when:
Lingyu provides both air-cooled and water-cooled refrigerated air dryers for different capacities and installation environments.
Desiccant air dryers remove water vapor from compressed air through adsorption.
They are typically used where significantly lower pressure dew points are required, including critical process air and instrument air applications.
Desiccant air dryers are commonly selected when:
Lingyu desiccant air dryer configurations include heatless, heated, blower purge, and other regeneration technologies for different energy and operating requirements.
Compressed air filters remove solid particles, oil aerosols, condensed water, and other contaminants from compressed air systems.
Filters may be installed before and after the air dryer depending on the compressor type, dryer configuration, and required air quality.
Compressed air filters are typically used to:
The appropriate filtration grade and filter combination should be selected according to the required air quality.
Nitrogen generators produce nitrogen on-site from compressed air.
PSA nitrogen generation systems separate nitrogen from compressed air and provide a continuous nitrogen supply based on the required purity, flow, and pressure.
Nitrogen generators are commonly used when:
Typical applications include laser cutting, food packaging, electronics, chemical processing, metal processing, and other industrial processes.
The correct compressed air treatment equipment should be selected according to the actual process requirement and operating conditions.
Key selection parameters include:
For compressed air dryers, airflow alone is not sufficient for accurate sizing. Temperature, pressure, dew point, and other operating conditions can affect the actual equipment capacity.
For nitrogen generators, nitrogen flow, purity, pressure, and compressed air conditions should all be considered.
Lingyu engineers can recommend a suitable product and configuration based on your operating requirements.
| Requirement | Recommended Product |
|---|---|
| General industrial moisture removal | Refrigerated Air Dryer |
| Low pressure dew point | Desiccant Air Dryer |
| Particle and oil removal | Compressed Air Filter |
| On-site nitrogen supply | Nitrogen Generator |
| General factory compressed air | Refrigerated Air Dryer + Filters |
| Very dry process air | Desiccant Air Dryer + Filters |
| High-purity process nitrogen | Nitrogen Generator + Air Treatment |
A refrigerated air dryer is commonly used for general industrial compressed air systems. A desiccant air dryer is typically selected when significantly lower pressure dew points are required.
Dryer capacity should be selected according to airflow, operating pressure, inlet temperature, ambient temperature, and required pressure dew point. Correction factors may be required when actual operating conditions differ from rated conditions.
In most industrial compressed air systems, filters are used before and/or after the dryer to remove particles, oil aerosols, and other contaminants. The exact filter arrangement depends on compressor type, dryer technology, and required air quality.
The main parameters include required nitrogen flow, nitrogen purity, outlet pressure, compressed air conditions, operating hours, and application.
Yes. Lingyu can provide dryers, filters, nitrogen generation equipment, and product configurations based on the operating conditions and air quality requirements of the compressed air system.
Send us your:Airflow · Working Pressure · Inlet Temperature · Ambient Temperature · Required Dew Point / Nitrogen Purity · Voltage/Frequency · Application
Our engineers will recommend a suitable product and configuration for your compressed air system.
No. 22-1 to 22-3, Jinzhu Road, Heting Town, Heshan City, Jiangmen City, Guangdong Province
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