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Heat-of-compression drum dryer

DRYPOINT ADZ

Ultra energy-efficient drying for oil-free compressed air systems

Maximum efficiency with zero air loss Continuous operation for long-term reliability Compact, sustainable and OEM-ready

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For integrated oil-free compressor solutions

Continuous drum technology for maximum efficiency and process stability

The DRYPOINT ADZ is a heat-regenerating adsorption drum dryer engineered specifically for oil-free compressed air systems.

Unlike conventional twin-tower dryers with switching cycles and valve blocks, the DRYPOINT ADZ operates continuously with a single rotating adsorption drum. It uses compressor waste heat for regeneration – eliminating purge air losses and dramatically reducing energy consumption. The result: stable pressure dew point by defined conditions, maximum efficiency and long-term reliability.

Its compact single-tower design reduces mechanical complexity and wear, making the DRYPOINT ADZ ideally suited for OEM compressor packages. Precisely matched to compressor type, pressure and flow rate, it integrates seamlessly into packaged solutions while also offering clear advantages for end users and project installations.

Your benefits at a glance

Why DRYPOINT ADZ?

  • Ultra energy-efficient – zero air loss

    Uses compressor waste heat for regeneration. No purge air, no compressed air losses, extremely low operating costs.

  • High reliability – minimal maintenance

    Continuous operation without switching cycles or valve blocks reduces mechanical wear and increases long-term reliability. 

  • Compact, quiet and space-saving

    Single-tower design with small footprint and operating noise ≤ 30 dBA – ideal for space-limited installations. 

  • Clean and dust-free drying

    Solid honeycomb adsorption structure instead of loose desiccant ensures clean, dust-free operation. 

  • Future-proof and sustainable

    No refrigerants, no F-gases, low carbon footprint and compliance with current and future environmental regulations. 

  • Designed for OEM integration

    Precisely matched to oil-free compressors, flexible configurations and plug-and-play integration. 

Ultra energy-efficient – zero air loss
High reliability – minimal maintenance
Compact, quiet and space-saving
Clean and dust-free drying
Future-proof and sustainable
Designed for OEM integration
For oil-free compressors, integrated systems and high-purity applications

Best-fit environments

  • Oil-free screw, centrifugal and reciprocating compressors
  • Food & beverage production
  • Pharmaceutical manufacturing
  • Electronics and semiconductor industries
  • OEM compressor packages
  • Retrofit projects and containerized compressor systems 
Precisely configurable for seamless compressor matching and project-specific system design

Flexible system integration

The DRYPOINT ADZ is predestined for OEM integration and project-specific solutions. 

  • Precisely matched to compressor type, pressure and flow
  • Compact and modular design
  • Plug-and-play installation
  • Water-cooled and air-cooled versions available
  • Optional monitoring and communication interfaces 

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Functionality

How our adsorption drum dryer works – simply explained

Unlike conventional twin-tower adsorption dryers, the DRYPOINT ADZ operates with a slowly rotating adsorption drum inside a single pressure vessel. 

  • A defined portion of hot compressed air upstream of the aftercooler is used for regeneration
  • Adsorption and regeneration take place simultaneously and continuously
  • No switching cycles, no depressurization phases
  • Stable pressure dew point under defined operation conditions 

The result: stable pressure dew point performance, high process reliability and exceptional energy efficiency – even under variable operating conditions. 

This principle ensures high process stability, low wear and exceptional energy efficiency. 

Hot air inlet
Dry air outlet
Control box
Pressure vessel
Gear motor
Water-cooled (or air-cooled) cooler
2x BEKOMAT
Wet air inlet
Ejector
Base frame

Hot air inlet

Upstream of the aftercooler high temperature compressed air.

Dry air outlet

The dried compressed air exits the system.

Control box

With PLC control and HMI screen, standard with Modbus communication protocol.

Pressure vessel

Pressure vessel can be GB/PED/ASME standard and drum inside.

Gear motor

Lowest power consumption gear motor drive drum operating at approximately 6-10 revolutions per hour.

Water-cooled (or air-cooled) cooler

An external, independent enlarged full-flow cooler ensures correct adsorption temperature and a stable outlet pressure dew point.

2x BEKOMAT

The world first electronically level-controlled zero air loss condensate drain, maximizes energy efficiency.

Wet air inlet

From the aftercooler normal temperature wet compressed air.

Ejector

Venturi ejector mixes high and normal temperature compressed air.

Base frame

A robust base frame ensures the structural stability of the equipment.

Step-by-Step Drying Process

Compressed Air from the Aftercooler

The oil-free compressor (OFS) is equipped or can be modified with two outlets. Discharge air is taken from the aftercooler at approximately 32–40 °C.

Hot Air for Regeneration

Discharge air is taken upstream of the aftercooler. Depending on the pressure rise at the final compression stage, the temperature can reach 160–180 °C. This heat is used for drum regeneration.

Regeneration Flow Control

A manual valve is used to adjust the volume flow, ensuring sufficient regeneration energy and proper differential pressure for mixing with stream from wet air inlet.

Mixing via Ejector

An ejector mixes the streams of wet air from the inlet and hot, wet air after regeneration, based on allowable pressure differences and computational fluid dynamics (CFD) calculations.

Cooling the Mixed Air

The cooler is designed for full volume flow. Both water-cooled and air-cooled versions are available.

Rotating Drying Drum

The pressure vessel contains the drum and is driven by a gear motor operating at approximately 6–10 revolutions per hour.

Dry Compressed Air Outlet

The dried compressed air exits the system. A dew point sensor is available as an option for monitoring dryer operating status.

Talk to our ADZ experts
Key specifications for the DRYPOINT® ADZ series

Model variants & information

Technical data
Max. volume flow (m3/min | cfm | l/s)
Wet air inlet / Dry air outlet (DN)
Hot air inlet (DN)
Cooling water connection (DN)
Dimension (L/W/H in mm)
Weight (kg)
ADZ010.1 W
12/424/200
65
50
40
1650/800/1950
750
ADZ015.1 W
17/600/283
65
50
40
1650/800/1950
750
ADZ020.1 W
23/812/383
80
65
40
1550/1250/2150
950
ADZ025.1 W
27/954/450
80
65
40
1550/1250/2150
950
ADZ030.1 W
32/1130/533
80
65
40
1700/1250/2150
1000
ADZ040.1 W
44/1554/733
100
80
40
2000/1500/2300
1600
ADZ050.1 W
52/1836/867
100
80
40
2000/1500/2300
1600
ADZ060.1 W
64/2260/1067
125
100
40
2000/1500/2600
1700
ADZ070.1 W
73/2578/1217
125
100
40
1900/1500/2600
1800
ADZ080.1 W
81/2681/1350
125
100
40
2000/1500/2600
1900
ADZ090.1 W
90/3178/1500
150
125
50
2100/1700/2900
2200
ADZ100.1 W
100/3532/1667
150
125
50
2100/1700/2900
2200
ADZ125.1 W
125/4414/2083
150
125
65
2050/1700/2900
2300
ADZ150.1 W
150/5297/2500
200
150
65
2300/1800/3100
3000
ADZ010.1 A
12/424/200
65
50
N/A
1300/1100/2000
700
ADZ015.1 A
17/600/283
65
50
N/A
1300/1200/2000
750
ADZ020.1 A
23/812/383
80
65
N/A
1600/1250/2300
950
ADZ025.1 A
27/954/450
80
65
N/A
1600/1300/2300
1000
ADZ030.1 A
32/1130/533
80
65
N/A
1600/1350/2300
1050
ADZ040.1 A
44/1554/733
100
80
N/A
1900/1500/2400
1350
ADZ050.1 A
52/1836/867
100
80
N/A
1900/1600/2400
1400

These models listed are also applicable to the corresponding VSD versions. For further technical details, pricing or project-specific support, please contact us.

More interesting facts about DRYPOINT ADZ

Frequently asked questions (FAQ)

What is a drum dryer and how does it differ from conventional adsorption dryers?

A drum dryer is a special form of adsorption dryer using a rotating adsorption drum inside a single pressure vessel. 
Unlike conventional twin-tower adsorption dryers, the DRYPOINT ADZ operates continuously without switching cycles, resulting in higher reliability, lower mechanical wear and stable drying performance. 

What pressure dew point can the DRYPOINT ADZ achieve?

The DRYPOINT ADZ reliably provides pressure dew points down to –20 °C or better, depending on operating conditions.

How energy-efficient is the DRYPOINT ADZ?

By using compressor waste heat and operating with zero air loss, the DRYPOINT ADZ offers extremely low operating costs. Furthermore, the drum dryer operates without refrigerants or F-gases and supports regulatory compliance. Its high energy efficiency therefore also contributes to a reduced carbon footprint.

Is the DRYPOINT ADZ suitable for oil-free compressors?

Yes. It is specifically designed for oil-free screw, centrifugal and reciprocating compressors.

How reliable is the drum dryer design?

The single-tower rotary drum design uses very few moving parts and no valve blocks. 
Continuous operation without depressurization cycles minimizes mechanical stress and ensures high long-term reliability, even under variable operating conditions. 

Can the DRYPOINT ADZ handle variable load conditions?

Yes. The continuous adsorption and regeneration process, combined with a stable airflow design, makes the DRYPOINT ADZ well suited for variable loads and fluctuating operating conditions, including VFD-driven compressors. 

Can the DRYPOINT ADZ also be used with variable-speed compressors?

Yes, we offer a special VSD version for speed-controlled compressors. For further technical details, pricing or project-specific support, please contact us.

Is the DRYPOINT ADZ suitable for OEM integration?

Absolutely. The DRYPOINT ADZ is predestined for OEM applications. 
It can be precisely matched to compressor type, pressure and flow rate and integrates easily into packaged compressor solutions. 

Is the dryer available in different sizes and configurations?

Yes. The DRYPOINT ADZ is available in multiple sizes and with air-cooled or water-cooled versions, covering a wide range of volume flows. 
Additional options such as dew point monitoring and communication interfaces are available. 

Is the adsorption material clean and dust-free?

Yes. The dryer uses a solid honeycomb adsorption structure, not loose desiccant. 
This ensures dust-free operation, ideal for sensitive industries such as food, pharmaceutical and electronics manufacturing.

Who can help me select the right configuration?

Our experts support you with application analysis, system design and configuration, whether for OEM projects or end-user applications. 
Simply contact us to discuss your specific requirements. 

Contact us for technical advice or project support

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DRYPOINT ADZ - Technical data and benefits

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