Our dryers for all types of polymers are characterized by their high efficiency and cost-effectiveness.
Expand your capabilities with KOCH-TECHNIK!



Our dry air dryers dry medium to very large quantities of plastic pellets with deeply dry air to the residual moisture required for the processing.

The used dry air technology works in a closed loop system, completely independent of the ambient climate: dehumidified and heated air flows through the pellets, absorbs their moisture and gives it to a drying agent.


The drying of hygroscopic polymers with compressed air is the most economical alternative for small throughputs compared to other drying systems.

The special ERD compressed air technology from FASTI KOCH ensures excellent drying results while keeping operating costs low.
The result: continuous drying performance, maximum reliability, easy handling and a small required space.

Polymer drying with the dry air technology from KOCH-TECHNIK

With our KKT type mobile dry air dryer, you can dry hygroscopic polymers right next to your processing machine. Depending on the model, from 55 m³ to 100 m³ of dehumidified air pass through the drying container per hour and the moisture of the granulates is absorbed. The saturated return air flows over two alternate drying agent containers where it is dehumidified again. This way, deeply dried air is produced with a dew point of about -35 °C. It corresponds to a value of 0.19 g H₂O per 1 m³ of dry air.
The current KKT models are available with a newly structured control unit:
  • Comfortable touch screen menu navigation
  • Drying programs adapted to the safe drying
  • Industrie 4.0 Vorbereitung durch Siemens S7 Kompatibilität
  • Materialdatenbank
  • Zeitschaltsteuerung zur Vorgabe der Trocknungszeiten
Also available upon request:
  • Patented KOCH ECO control system
  • Dew point monitoring with data recording
  • Material supply system to fill more drying containers or the processing machine
There are three suitable programs to choose from for optimum polymer drying:
  • The ECO energy saving program saves up to 40% energy. It will pay off if a rarely dried material is taken.
  • If it has to go fast, you can dry high throughputs of consistent quality in the high-speed program.
  • The basic program is tailored to your daily standard production./li>
As required, our complementary dryers with different drying containers are available. Large containers are mounted on a mobile rack.
Type KKT 55 KKT 75 KKT 100S
Dry air quantity 55 m3/h 75 m3/h 100 m3/h
Drying containers to be chosen from (in litres) 12/20/40/
Volume of an individual container max. 150 litres 200 litres 300 litres
Total volume of several containers 120 litres,
3 max.
160 litres,
3 max.
200 litres,
4 max.
Mobile KKT dry air dryer series from Koch-Technik – quiet and reliable. KKT 100S on the left, KKT55 with a container behind the unit on the right.
CKT 200 dryer for plastic pellets: Benefit oriented in every detail
From the suction box over the dew point control up to the patented ECO system control: With the CKT dryer series, we promise you easy and safe operation. With this sophisticated technology, you have everything in hand to dry plastic pellets in larger quantities in a material-saving and efficient way.
A row of 3 CKT dryers with drying containers for more than 25 different materials.
Our dry air technology – Your advantage: Bone dry, warm air flows through the drying containers and absorbs the moisture of the pellets.
The saturated dry air flows through a desiccant container where it is dehumidified and then it flows again through the pellets.
When the desiccant is saturated, the drying air flow is diverted to a fresh container and the previous container is regenerated. Due to the constantly changing regeneration, we can guarantee you a consistent pellet drying.
Economical drying: In addition to the effective granule drying, we also offer you efficient drying solutions.
They protect your material and save energy: With the KOCH ECO control system, you protect your material against overdrying and in combination with a dew point control and frequency-controlled blowers, you can save half of the energy normally used for the drying. We would be happy to advise you! Characteristics of our CKT series for polymer drying:
  • Proven and fully developed pellet drying technology.
  • Depending on the version, from 110 m³/h to 2000 m³/h of dry air is generated
  • Material containers available in various sizes
  • The highest energy efficiency with additionally selectable components: Dew point control (incl. from CKT 300), KOCH ECO control system and frequency-controlled dry air supply
  • Existing drying systems can be easily extended
The optional touch panel control unit simplifies the monitoring of drying processes.
Dryer Possible dry air quantity
Type CKT110 110 m3/h
Type CKT200 200 m3/h
Type CKT300 300 m3/h
Type CKT500 500 m3/h
Type CKT800 800 m3/h
Type CKT1100 1100 m3/h
Type CKT1700 1700 m3/h
Type CKT2000 2000 m3/h
One of a total of 6 CKT1700 type pellet dryers shortly before delivery to China. At present, the system of 6 CKT 1700 dryers with a capacity of 10,200 m³/h supplies 10 extruders with a calculated 5,750 kg of material per hour.
EKO-N: Drying quality at the highest level – here the EKO-N 1100F with a total of 16 drying containers
NEW dry air dryer TYP EKO-N – Drying quality with biggest energy-saving efficiency
The pros of the existing drying concepts CKT & EKO together in one drying unit: The dry air dryer EKO-N
The heat exchanger concept in the pipe system adopted from the EKO dryer has been further improved in the EKO-N series and is used here even more efficiently. The thermal energy return reduces the energy consumption by 20 to 30%, depending on the drying temperature of the material. This reduces the average energy consumption while maintaining the same quality.
The EKO-N dryer includes frequency-controlled drying fans and the energy-saving dew point control as standard (both from EKO-N 300F). The patented KOCH-ÖKO energy system control is available for the EKO-N drying containers for the greatest possible energy savings, which adapts to the drying process in an energy-saving, material-friendly and intelligent manner. In the combination of dew point, eco-system control and frequency-controlled fans, energy savings of up to 50% are possible when drying granules.
KOCH dry air dryer type EKO-N 1100F: The 16 drying containers are recessed into the floor of a mezzanine.
EKO-N pros and features with a new design:
  • Nine different dryer sizes from EKO-N 110 – 2000 m³/h are available
    110(F) / 150 (F) / 200 (F) / 300F / 500F / 800 F / 1100F / 1700F / 2000F
  • Up to 50% energy saving with the same qualitiy
    • Thermal energy return via heat exchanger (Air – Air)
    • Frequency controlled dry air dryer *
    • Dew point controlled drying *
    • ÖKO energy saving patented KOCH control for material care drying (optional)
  • EKO-N drying containers from 40 – 1200 liters (from 1500 liter in CKT-Design):
    • Drying container available on frame (stationary or mobile) or integrated in a dryer platform
  • EKO-N concept with modular built up for easy expansion of the dry air dryer
  • Fully integrated KOCH visualisation software
  • Control unit (S7) incl. 10,4“ Touch-Panel & material database for 212 recipes
  • “Smart-Factory”: Industrie 4.0-compatibek through OPC-UA communication standard

* (also optional available for EKO-N 110, 150 & 200)

The EKO-N 200F with two drying containers 300 liters each.
According to the KOCH modular system, different drying containers from 40 liters to 1.200 liters can be integrated into the EKO-N. Bigger drying container will keep being built in the proven CKT-Design. Another advantage: Due to the modular structure of the drying system, Expansion of drying containers can be carried out without any problems. Nine different dryer sizes from EKO-N 110 to 2000 (m³ / h) are available.
The drying process is continuously monitored by sensors. In order to absorb the moisture in the granulate and to achieve the required residual moisture in the material to be dried, it is possible to generate dry air with a dew point of -55 ° C.
The EKO-N is Industry 4.0 compatible thanks to the OPC UA communication standard and can be fully integrated into the KOCH visualization software.
Functional diagram
Clear display of all drying cycles
All our type CKT and type EKO plastic pellet dryers are equipped with the functional diagram in the basic version. This diagram that is a simplified illustration of the drying cycle allows you to monitor the pellet drying at a glance. This is an easy-view solution.
The KOCH-TECHNIK EKO type pellet dryer in the basic version with a functional diagram
Dryer control via touch display
The control extension for the CKT and EKO dryer
We offer the touch panel control as a control extension for all dry CKT and EKO type air driers. This control system combines all basic and optional control components that can be monitored and operated via the large touch display:
  • Touch-sensitive 10-inch display
  • Display and temperature control of the drying circuits
  • Reduction mode
  • Throughput detection for each drying container and an alarm message if the throughput is exceeded
  • Multiple language selection
  • Password protection safety system
  • Material database (series from the 2017 version)
Optional components:
  • Taupunktüberwachung, -Steuerung und -Aufzeichnung (Serie ab CKT 300 und EKO 300)
  • Dew point monitoring, control and recording (series from CKT 300 and EKO 300)
  • Automatic load matching
  • KOCH ECO control system (energy-efficient flaps)
  • Control for an internal material conveying system
  • Interfaces and data bus for visualization software
  • Upgrade of older KOCH drying systems possible
Upon request, we also enable you to monitor the drying system with the app. This possibility provides priceless added value especially for drying systems on platforms (mezzanines).
KOCH dew point control
Dew point controlled plastic pellet drying saves up to 40% energy
For dry air drying without dew point control, the desiccant containers alternate in fixed cycles during dehumidification and regeneration. The flow rates and the moisture content of the material to be dried are not taken into account.
On the other hand, KOCH dry air dryers with dew point control work depending on the dew point and therefore are considerably more energy-saving. As soon as a desiccant reaches the dew point limit of -30 °C, it is switched to a fresh, regenerated desiccant container. It means that the drying process adapts to the material: when the pellets are very moist, the switching cycles are shorter and when the moisture content is low, they are correspondingly longer.
The advantage of the dew point-controlled drying is obvious: High energy savings and the always consistent quality of the final product.
Patented KOCH ECO control system
Our patented control system for material-friendly and energy saving pellet drying
Our ECO control system guarantees that hygroscopic materials such as PA, PC, LCP, POM, etc. are not overdried: During the dry air-drying process, the material in the storage containers is dried to the “residual moisture required for the processing”. If no or little material is taken from a container, further drying may lead to overdrying and damaging the material. The KOCH ECO control system prevents that!
If the temperatures in the upper area of the container reach a defined value, the ECO control system automatically removes such a container from the drying cycle. Once the pellets are removed or the dwell time is exceeded, the container is joined again.
  • Your material is not overdried.
  • You always have pre-dried pellets available.
  • You save energy – in a significant extent.
Other advantageous properties:
  • Control of the required air quantity for each individual drying container
  • Control of the defined air quantity – independently of the filling quantity and shape of material
  • The exactly required amount of dry air flows always through the container.
  • Optionally with automatic load adjustment

FASTI KOCH: Polymer drying with ERD compressed air technology

Since 2010, the FASTI brand has had its headquarter in Ispringen. The proven plastic pellet dryers get designed and more developed there.
You can take a FASTI-KOCH pellet dryer for that:
  • For drying the smallest to medium machine throughputs of hygroscopic material
  • As an alternative when the economic need for larger drying systems is not yet given
  • While processing highly hygroscopic materials, to prevent the pellets from absorbing moisture again already during the dwell time in the hopper
The FASTI-KOCH units are manufactured in the dryer manufacture of KOCH-TECHNIK in Germany
FASTI KOCH – Polymer drying directly on top the processing machine
Our ERD compressed air technology is a proven process for drying plastic pellets. The ERD compressed air technology guarantees perfect drying results along with low operating costs and an almost maintenance-free drying process.
FASTI-KOCH pellet dryers are suitable for the pre-drying directly on top each injection moulding machine or extruder.
The dryers are installed on the draw-in zone of the machines and dry the plastic material directly before the processing. Thus, the pellets stay warm and dry and are not rehumidified.
FASTI KOCH ERD Xpert+ – Polymer drying directly on top the processing machine
ERD compressed air technology: On the operation end, the pre-dried compressed air (6–10 bars) is released through a proportional valve. The valve is controlled proportionally according to the input pressure to reach a constant air quantity and a deep dew point. The released air is then heated to the drying temperature and flows into the lower part of the material hopper. The drying air flows upwards through the pellets and takes the moisture from them.
The ERD Xpert+ pellet dryer is ideal for small to medium throughputs of raw materials that must be processed with a constant degree of drying:
  • Proven ERD compressed air technology
  • Compact modular system (pilot design)
  • Intelligent clip-on technology
  • Drying hopper (material container) made of stainless steel
  • Available container sizes: 7, 12, 27, 42 and 62 litres
  • Hinged containers (42 and 62 litres) as an option
  • Low maintenance and expenditure of energy
  • Ideal drying for all plastics
  • Suitable for plastics up to 160 °C
  • Dew point up to -65 °C if required
  • Simple installation (plug & play)
  • Installation as top-mounted dryer (additional rack as option)
  • Integration on to all standard machines
  • Optional conveyor or AirJet-conveying system
  • Extensive system accessories
Intelligent clip-on technology: The pilot module is easy to remove. It can be attached to the processing machine if there is a lack of space.
Simple and clear control via a touch panel:
  • Drying time monitoring with and without temperature reduction
  • Integrated weekly switching program
  • Material database for frequently dried types of material
  • Performance and air flow control adapted to the material flow
  • Control for conveying/emptying
  • Mode for batch drying
  • Dew point indication with a dew point sensor as an option
  • Optional interfaces: USB, Ethernet
ERD Micro+: Our most compact pellet dryer with ERD compressed air technology
The ERD technology guarantees perfect drying results and very low operating costs also with our ERD Micro+.
On the operation end, the pre-dried compressed air (6–10 bars) is released to the atmospheric pressure. Dry process air with a very low dew point is generated in this manner. It is introduced into the glass drying container heated and flows through the pellets, thus removing any moisture.
The ERD Micro+ was specially developed for micro injection moulding or mini extruders:
  • Proven ERD compressed air technology
  • Very compact design
  • Drying hopper (material container) made of special glass
  • Container sizes: 1/2, 1, 2, 3 litres
  • Control system adapted to the respective container size
  • Low maintenance and expenditure of energy
  • Ideal for all plastics, also for plastics up to 160 °C
  • Dew point up to -65 °C if required
  • Simple installation (plug & play)
  • Installation as top-mounted dryer on all standard machines
  • Optional AirJet conveying
  • Extensive system accessories
Very simple dryer control system:
  • Drying time monitoring
  • Integrated weekly switching program
  • Material database
  • Performance and air flow control adapted to the material flow
  • Control for conveying/emptying
  • Dew point indication with a dew point sensor as an option
  • Optional interferences: USB, Ethernet
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