SF refrigeration dryer
First refrigeration dryer with a pressure dew point DPD of -20°C
The ground-breaking SF dryer, which delivers ISO class 3 air quality, is the only regenerative refrigeration dryer available today for compressed air production. It combines the sub-zero pressure dew point (PDP) of a typical regenerative desiccant dryer with the low operating and energy costs of a refrigeration dryer, now with flow rates of up to 1,600 m3/h.
Pressure dew point
−20 °C
Flow rate
360 to 1,600 m³/h
Compressed air quality
ISO class 3
Purge air
none
The advantages of SF Subfreezing refrigeration dryers
- High-quality ISO class 3 air with a pressure dew point (PDP) of -20°C is delivered without interruption across the compressor’s entire operating range (0-100%).
- Ideal for systems where piping or pneumatic equipment is exposed to sub-zero temperatures.
- A patented two-chamber heat exchanger design for sub-zero temperatures with a pre-/aftercooler delivers a sub-zero PDP while lowering energy and operating costs.
- No purge air required for regeneration, significantly improving energy efficiency.
- No expensive consumables such as drums or desiccant wheels that need replacing, reducing maintenance costs.
- An advanced controller ensures high air quality through an intuitive high-resolution display and remote access to integrated web pages.
- Plug-and-play with a 40% smaller footprint and full compatibility with all compressor types, without expensive modifications to the compressor or downstream particulate filtration.
- Intelligent solenoid valve drains are actuated as needed to ensure complete moisture removal during every cycle.
- Compatible with any compressor technology without costly investment, offering versatility for every application.
SF Subfreezing Dryers 360-1,600 m3/h Performance
| Model | Capacity (FAD)*-20°C PDP m3/h | Max. Operating Pressure | In/Out Connections | Nominal Power | Dimensions (L x W x H) mm | Weight |
|---|---|---|---|---|---|---|
| D360SF-A | 360 m3/h | 14bar | 1-1/2″ | 1.46 kW | 1,063 x 899 x 1,767 | 352kg |
| D420SF-A | 420 m3/h | 14bar | 1-1/2″ | 1.78 kW | 1,063 x 899 x 1,670 | 352kg |
| D1600SF-A | 1,600 m3/h | 11bar | 3″ | 5.75 kw | 1,400 x 1,524 x 1,902 | 750kg |
Frequently asked questions
What is special about the SF refrigeration dryer?
It achieves a pressure dew point of −20 °C, as a regenerative desiccant dryer normally would. At the same time, it has the low operating and energy costs of a refrigeration dryer.
Which applications is it suitable for?
For systems in which piping or pneumatic equipment is exposed to sub-zero temperatures.
How does a refrigeration dryer reach a dew point below zero?
With a patented two-chamber heat exchanger for sub-freezing temperatures and a pre-/after-cooler. It needs no purge air for regeneration.
Is the compressed air quality maintained at part load?
Yes. ISO class 3 with a −20 °C pressure dew point is delivered without interruption across the compressor’s entire operating range from 0 to 100%.
Which models are available?
D360SF-A with 360 m³/h and D420SF-A with 420 m³/h, both up to 14 bar, plus D1600SF-A with 1,600 m³/h up to 11 bar. Rated power ranges from 1.46 kW to 5.75 kW.
What consumables are required?
No expensive consumables such as drums or adsorption wheels that need replacing. This lowers maintenance costs.
How complex is the installation?
The SF is plug-and-play, needs 40% less space and is compatible with all compressor types. No changes to the compressor and no downstream particulate filtration are required.
How is the condensate drained?
Intelligent solenoid valve drains are actuated on demand and completely remove moisture in every cycle.
How do I monitor the dryer?
Via a controller with a high-resolution display and remote access to integrated web pages.
Who can help me with sizing?
We do. The right size depends on flow rate, compressed air inlet temperature, ambient temperature and application. Call us or write to us.
Which refrigeration dryer suits your application?
The sizing of the right refrigeration dryer varies with flow rate, compressed air inlet temperature, ambient temperature and application. Let us advise you to find the best model for your needs.
