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AC 2650-4200 & AC 2650-8500 VSD

High-capacity cycling refrigeration dryers with variable speed drive technology, designed for demanding compressed-air systems requiring reliable moisture removal, stable air quality and energy-efficient operation.
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Introduction

Atcorp offers AC 2650–8500 VSD cycling refrigeration dryers for large compressed-air installations with demanding and variable air consumption. The range combines variable speed drive technology, direct-expansion refrigeration, efficient heat exchangers and intelligent controls to maintain a stable 3°C pressure dew point while reducing energy consumption during partial-load operation.

Key Benefits

High-Capacity Air Treatment
Stable 3°C Dew Point
Low Pressure Drop
Variable Speed Operation
Up to 50% Energy Saving
Air- & Water-Cooled Options

Why Choose AC 2650–8500 Vsd?

Large industrial compressed-air systems often experience significant variations in demand. The AC 2650–8500 VSD range responds to these variations by adjusting refrigeration capacity according to actual air demand, while maintaining the required pressure dew point. This helps reduce wasted energy and supports reliable dry-air delivery for high-flow applications.

AC 2650-4200 (Air-cooled & water-cooled)

 

AC 2650-4200 (Air-cooled & water-cooled)

Model

Nominal flow rate (m3/h)

AC 2650

4500

AC 3200

5400

AC 3700

6300

AC 4200

7200


AC 2650-8500 VSD (Air-cooled & water-cooled)

 

AC 2650-8500 VSD (Air-cooled & water-cooled)

Model

Nominal flow rate (m3/h)

AC 2650 VSD

4500

AC 3200 VSD

5400

AC 3700 VSD

6300

AC 4200 VSD

7200

AC 5100 VSD

8640

AC 6400 VSD

10800

AC 8500 VSD

14400

The dryer uses refrigeration to cool compressed air, condense moisture and remove it before the air enters the downstream distribution system.

 

Step 1 – Moist Air Entry
Warm, moisture-laden compressed air enters the refrigeration dryer.

 

Step 2 – Air-to-Air Cooling
The incoming compressed air is pre-cooled by the outgoing dry air through the air-to-air heat exchanger.

 

Step 3 – Refrigeration Cooling
The air passes through the air-to-refrigerant heat exchanger, where its temperature is reduced further.

 

Step 4 – Moisture Condensation
Cooling causes water vapour to condense into liquid moisture.

 

Step 5 – Condensate Removal
The collected moisture is removed through the dryer drain system.

 

Step 6 – Air Reheating
The dried compressed air is reheated through the air-to-air heat exchanger.

 

Step 7 – Dry Air Delivery
The treated air exits with a pressure dew point of approximately 3°C.

 

Step 8 – VSD Load Matching
The refrigeration compressor adjusts speed according to actual compressed-air demand, improving efficiency during partial-load operation.

High-Flow Air Treatment

With capacities up to 14,400 m³/h, the range is designed for large industrial compressed-air systems.

 

Variable Speed Drive Technology

The VSD inverter automatically adjusts refrigeration compressor speed according to actual compressed-air demand, reducing unnecessary energy consumption at lower loads.

 

Stable 3°C Pressure Dew Point

Direct-expansion technology helps maintain a stable pressure dew point of approximately 3°C across operating conditions.

 

Multiple Energy Modes

The VSD control algorithm provides different operating strategies, including economy operation, lowest-dew-point operation and maximum-saving operation.

 

Better Part-Load Efficiency

The dryer achieves improved turndown efficiency when operating below full load, making it well suited to plants with fluctuating compressed-air demand.

 

Low Pressure Drop

Efficient heat-exchanger design minimizes pressure losses, helping reduce the additional compressor energy associated with air-treatment equipment.

 

Air- or Water-Cooled Configuration

The range is available in both air-cooled and water-cooled versions, providing flexibility based on plant utilities and installation conditions.

 

Advanced Monitoring

The PureLogic Touch controller provides real-time operating information, control and performance monitoring to support efficient operation and maintenance.

Standard Features

  • Variable Speed Drive technology
  • Direct-expansion refrigeration
  • 3°C pressure dew point
  • Energy-efficient heat exchanger
  • Fully hermetically sealed refrigerant compressor
  • Phase-sequence relay
  • Refrigerant filter/dryer
  • Electronic hot-gas-bypass valve
  • PureLogic Touch controller
  • R410A refrigerant
  • Air-cooled configuration
  • Water-cooled configuration
  • High-flow compressed-air handling
  • Low pressure drop
  • Advanced load-based control

 

VSD Control Modes

  • Economy Mode – Optimizes energy consumption while maintaining suitable dew-point performance.
  • Lowest Dew Point Mode – Prioritizes the lowest achievable pressure dew point.
  • Maximum Saving Mode – Prioritizes energy savings when process requirements allow.

Industrial Applications

AC 2650–8500 VSD refrigeration dryers are designed for large industrial compressed-air installations where high airflow, dependable moisture removal and energy efficiency are essential.
Automotive Manufacturing
Provides dry compressed air for large-scale pneumatic tools, assembly systems and automated production lines.
Steel & Metal Processing
Supports high-volume compressed-air systems used throughout demanding metal-processing facilities.
Cement & Construction Materials
Helps protect pneumatic equipment and control systems from moisture in large production plants.
Chemical & Process Industries
Provides reliable moisture removal for large compressed-air networks supporting continuous production.
Food & Beverage Manufacturing
Supports dry compressed-air requirements for suitable general industrial and utility applications.

Frequently Asked Questions

Find answers about AC 2650–8500 VSD cycling refrigeration dryers, including capacity, dew point, VSD operation, cooling configurations, energy efficiency and installation.
The AC 2650–8500 VSD is a high-capacity range of cycling refrigeration dryers designed for compressed-air flows from approximately 4,500 to 14,400 m³/h. It uses variable speed drive technology to match refrigeration capacity with actual demand.
The range provides a stable pressure dew point of 3°C, corresponding to ISO 8573-1:2010 Class 4 mThe range is designed to provide a stable pressure dew point of approximately 3°C / 37°F.oisture performance.

The manufacturer states energy savings of up to 60%, depending on the operating profile and compressed-air demand.

The VSD range includes:

  • AC 2650 VSD – 4,500 m³/h
  • AC 3200 VSD – 5,400 m³/h
  • AC 3700 VSD – 6,300 m³/h
  • AC 4200 VSD – 7,200 m³/h
  • AC 5100 VSD – 8,640 m³/h
  • AC 6400 VSD – 10,800 m³/h
  • AC 8500 VSD – 14,400 m³/h
Yes. The range is designed for high-flow industrial compressed-air systems and is suitable for both continuous and varying air-demand applications.
Yes. Atcorp can help Indian industrial customers evaluate compressed-air flow, operating pressure, inlet temperature, ambient conditions, cooling-water availability and demand variation to identify the appropriate dryer model and cooling configuration.

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