Refrigeration dryers

AC 765-2120 VSD & AC 650-2100 VSD

The AC 765-2120 VSD and AC 650-2100 VSD are Pneumatech’s premium refrigeration dryers for high flows from 1120 to 3636 m³/hr, providing excellent drying performance, superior reliability, and significantly lower operating costs.

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Energy efficiency

Savings with VSD

Equipped with Variable Speed Drive (VSD) technology, the AC 765-2120 VSD and AC 650-2100 VSD dryers adjust motor speed to match air demand, cutting energy consumption by up to 60%, even during partial load conditions.

Reliable design

Stable & efficient drying

The Variable Speed Drive (VSD) works alongside automatic expansion and hot gas bypass valves to ensure a constant dew point and smooth performance, even when operating conditions vary.

Easy installation & maintenance

Plug & play convenience

Simple to install and easy to maintain, these dryers feature accessible pipe connections, long service intervals, and quick access to key components, helping minimise downtime.

AC 765-2120 VSD & AC 650-2100 VSD Cycling Refrigeration Dryers

The AC 765-2120 VSD and AC 650-2100 VSD are Pneumatech’s premium refrigeration dryer ranges for higher flows – from 1120 to 3636 m³/hr (657-2141 cfm). Both deliver strong drying performance, superior reliability, and significantly reduced operating costs, thanks to their energy-saving controls and algorithms, low pressure drop, and quality components.

 

Dedicated variable speed drive (VSD) variants are available in both ranges to reduce energy use by as much as 60% compared to conventional dryers and ensure a stable dew point. The AC 765-2120 VSD is air-cooled, while the AC 650-2100 VSD is the water-cooled version.

AC 765-2120 VSD frefrigeration dryer front

Refrigeration dryer technology

Available in air-cooled or water-cooled models, refrigeration dryers remove moisture from the warm, compressed air. The air first passes through the air-to-air heat exchanger before moving to the air-to-refrigerant heat exchanger, where the moisture is condensed and drained. The air is then reheated to room temperature, lowering the pressure dew point and preventing condensation in the piping. This heat exchange process also reduces the cooling demand of the refrigerant system by pre-cooling the incoming air. Refrigeration dryers are a popular drying method and are widely used across multiple industries.

Key features

Variable Speed Drive technology

The AC 765-2120 VSD and AC 650-2100 VSD ranges feature advanced Variable Speed Drive (VSD) technology, transforming the efficiency of refrigerated air dryers. Controlled by an inverter, the motor speed adjusts in real-time to match compressed air demand, optimizing energy use and significantly lowering operating costs.

By operating at lower speeds during low demand while ensuring full capacity when needed, these dryers enhance energy efficiency, reduce component wear, and extend lifespan. With a focus on performance and sustainability, the AC 765-2120 VSD and AC 650-2100 VSD set a new benchmark for energy-efficient air treatment solutions.

AC 765-2120 VSD refrigeration dryer inverter detail shot

Key features

Advanced Purelogic Touch controller

The AC 765-2120 VSD and AC 650-2100 VSD ranges are equipped with the PureLogic Touch controller, enhancing both user experience and operational efficiency. This intuitive interface allows real-time monitoring, easy adjustment of settings, and optimized performance control.

 

With remote access to system data, users can analyze performance and troubleshoot from anywhere, ensuring consistent air quality, improved energy efficiency, and simplified maintenance, all while minimizing downtime.

Purelogic Touch controller

Experience the advantages of advanced compressed air drying

Ready to take your compressed air system to the next level? Investing in a quality dryer ensures clean, dry air that protects your equipment, reduces maintenance costs, and boosts overall efficiency. With advanced features designed for reliability and energy savings, a high-performance dryer can significantly improve your operations. Reach out to us today and discover how upgrading your air drying solution can benefit your business.

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General specifications

Pressure dew point (°C)

3

Nominal flow rate (m3/h)

1116 - 3636

Max. inlet temperature (°C) - AC / WC

60

AC 765-2120 VSD (Air-cooled)

Model

Nominal flow rate (m3/h)

AC 765 VSD

1296

AC 975 VSD

1656

AC 1125 VSD

1908

AC 1400 VSD

2376

AC 1865 VSD

3168

AC 2120 VSD

3600

AC 650-2100 VSD (Water-cooled)

Model

Nominal flow rate (m3/h)

AC 650 VSD

1116

AC 850 VSD

1476

AC 1050 VSD

1836

AC 1600 VSD

2736

AC 1800 VSD

3132

AC 2100 VSD

3636

AC 765-2120 VSD & AC 650-2100 product brochure

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  • Energy-saving and flow control algorithms
  • Variable speed drive versions save up to 60% on energy use
  • Lowest pressure drop over heat exchanger and air piping
  • Zero-loss drains
  • Stable pressure dew point as low as 3°C/37°F
  • Rotary screw refrigerant compressor with limited mechanical load and low vibrations
  • Guaranteed drying performance in wide range of ambient temperatures
  • Optimized refrigeration cycle in all conditions with automatic expansion valve and electronic hot gas bypass valve
  • Advanced control and monitoring with Purelogic & Purelogic Touch controllers
  • Plug & play operation
  • Available versions: AC 650-2100 VSD (water-cooled), AC 765-2120 VSD (air-cooled)

  • Cycling and VSD refrigeration dryers
  • Operating pressure: 4-14 barg / 58-203 psi
  • Max. ambient temperature: AC 1250-2100 FS AC: 40°C / AC 650-2100 VSD WC: 50°C / AC 765-2120 VSD AC: 46°C
  • Flow rate: 1116-3636 m3/h (657-2141 cfm)
  • Pressure dew point: 3°C/37°F
  • Power supply available: 400V/50Hz; 380V/60Hz; 400-460/60Hz 
  • Refrigerant gas: R410A: AC 650-2100 & VSD / R513A: AC 765-2120 VSD

Get in touch

Have questions or want to learn how our compressed air dryers can enhance your operations? Get in touch with us! Our team is ready to share insights and support you in optimizing your processes with our advanced drying solutions. Let’s elevate your operations together!

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