K850 drying system

By means of a large-volume centrifuge with a diameter of 850 mm, the fully automatic, continuously operating unit is used to dry cut lettuce and whole leaves as well as cut fruit and vegetables. The system sets new standards in terms of hygiene.

up to 5,000 kg/hMax. capacity
K850 drying system from KRONEN: large-scale centrifuge plant for up to 5 t/h – for products including salad (salad mixes, lamb’s lettuce, iceberg, rucola etc.), herbs, spinach, cut vegetables (e.g. carrots and cabbage) as well as fruit and mushrooms

Your benefits

  • Continuous dewatering: designed for large processing lines
  • High drying performance, for example dewatering lettuce down to a residual moisture level of 3 %
  • Ensures easy, safe operation 
  • Processing is extremely gentle – ideal even for sensitive products
  • Various parameters enable flexible adjustment to different products
  • A compact, open design enables optimal hygiene and a low space requirement 

Product groups


Dries lettuce, fruit and vegetables fully automatically, efficiently and hygienically: up to 5,000 kg of product per hour

The K850 is a fully automatic drying system for lettuce, fruit and vegetables and is designed for use in continuous processing lines. It is an upgraded version of the K650. The increased capacity of the K850 is achieved by the larger centrifuge drum as well as shorter cycle times, which are achieved by increased acceleration by means of an even more powerful but comparatively more energy-efficient drive unit.

The product leaves the washing unit and is deposited on the infeed buffer conveyor. Due to the buffer conveyor, the K850 processes continuously, although the centrifuge itself dries in batches. As soon as the centrifuge with an 850 mm diameter drum is full, the buffer conveyor runs in reverse mode until there is space in the centrifuge. With an optional volume control, the infed product quantity can be optimized. At the end of the drying cycle, the spinning speed is reduced and the product is gently forwarded to the discharge belt by a single blowing-off procedure. It is timed in such a way that the product flow is as even as possible. After drying, the product is transferred either into containers or onto the infeed belt of an automatic weighing or packaging machine. 

The parameters in the programs have been largely automated so that settings are clear and the system is easy to operate. Without product, the unit automatically switches to energy-saving mode. An integrated spraying system can be used for intermediate cleaning.

The K850 is supplied as a  "Plug & Play" & version, meaning that only the cables of the individual components need to be connected in the free-standing switch cabinet to make the machine ready for operation. The system is equipped with a TOSI-BOX for remote maintenance as standard. Optionally, the control unit can be upgraded with SMART functions. 

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KRONEN K850 drying system for lettuce, vegetables, fruit - up to 5 t/h
By means of a large-volume centrifuge with a diameter of 850 mm, the fully automatic, continuously operating unit is used to dry cut lettuce and whole leaves as well as cut fruit and vegetables. The system sets new standards in terms of hygiene. Max. capacity: up to 5,000 kg/h More: www.kronen.eu
High capacity salad and leafy vegetables processing line - teaser
The innovative processing line is technically state-of-the-art and sets new standards especially in the field of hygiene. It includes the GEWA XL and GEWA AF washing machines, the latest washing technology, and the K850 drying system, a system for gentle drying.
Automated processing line for salad & leafy vegetables with high capacity & new washing technology
The innovative processing line processes up to 1,000 kg of baby leaf lettuce or the equivalent amount of mixed lettuce or leafy vegetables per hour. The highlights of this processing line include • the GEWA AF pre-washing machine, a new development by KRONEN; • the further developed GEWA XL helical washing machine; and • the K850 drying system, a further development of KRONEN’s K650 model.
Processing line for lettuce and vegetables from KRONEN - for up to 4 t/h
The processing line is used to wash and dry lettuce and vegetables. The innovative K850 drying system with optional volume control is integrated: the fully automatic, continuously operating drying system sets new standards in terms of hygiene. In addition, two HELICAL GEWA 4000B PLUS washing machines with special equipment - including a water management system - are included. More: www.kronen.eu


The K850 drying system from KRONEN has a safety interlock for contact protection such as the docking stations at the buffer conveyor and discharge belt, which guarantee that the product is cleanly fed and discharged at the same time

Compact, safe design for a small space requirement 

The setting of the infeed height of the K850 is deliberately low in relation to the size of the machine. This minimizes the length of the buffer conveyor, thus saving a considerable amount of space with regard to the installation area of the large-scale unit. Two installation options are available for the K850: the discharge conveyor can be installed in a straight line (11,000 x 3,300 x 3,400 mm) or at a 90° angle for discharge to the side (8,000 x 6,500 x 3,400 mm). The unit does not require a safety zone or protective guards that would require a great deal of space and disturb the working procedure. For example, safety interlocks such as those at the docking stations on the buffer conveyor (see fig.) and the discharge belt ensure contact protection. At the same time, they guarantee that the product is fed in and discharged properly.

The K850 drying system from KRONEN convinces with its well thought-out, modern hygienic design

New standards for simple, effective cleaning

The open and hygienic design ensures easy cleaning and maintenance. The system can be cleaned particularly quickly due to two optional cleaning modes, which adjust the speed of the belts and the machine. One of these modes is for cleaning the system between product changes: When the machine is started up, a short, automatic cleaning procedure is performed to ensure that no product remains in the drum. The mode for cleaning the system at the end of the shift is activated at the press of a button: Water is then fed into the system while the belts and machine are in operation. As a result, the system is completely pre-cleaned with water and can then be sprayed with a cleaning agent. The belts are mobile and easy to remove due to the quick-release locking mechanism. Alternatively, the belts come equipped with integrated lift holders, thanks to which the belts can also be cleaned without having to be removed. A flexible plastic sheet is positioned underneath the conveyor belt to catch and drain off the dripping water. It is also optionally available for the buffer conveyor. The special advantage of the sheet is that it can be removed quickly and easily without effort or tools.

The K850 drying system from KRONEN permits flexible program settings for different products and is easy to operate

Flexible settings for a perfect result

In operation, a differentiation has to be made between two users: production and service. They have different access data to prevent settings from being accidentally changed. To ensure processing efficiency and the quality of the end product, various parameters can be set – depending on the consistency, shape and size of the product. The programs can be entered, changed and saved very easily using a seven-inch touch panel. Important parameters include the spinning speed and duration, as well as a right-left run mode for large-leaved products. Some parameters are automated, including the speed of the infeed and discharge conveyors, to make the system clearly structured and easy to operate.


Drip belts for the water outfeed are available as options for the K850 drying system from KRONEN.
Water drainage with flexible drip belts

Flexible belt material is used for water drainage in the K850. It is lighter in weight and significantly more flexible than conventional drip plates. The optional drip belts on the infeed belt and buffer conveyor prevent water from dripping onto the belts. The drip belts can simply be released on one side and are therefore particularly easy to clean.

To regulate the quantity of product, the drying unit K850 / K650 can be equipped with a volume control function.
Volume control

To regulate the quantity of product that leaves the washing machine in an uneven manner, the drying unit can be equipped with a volume control function. It consists of a sensor mounted at the top end of the infeed belt. The function ensures that the product is transferred to the buffer conveyor in an even layer. As soon as the set product height has been reached, the buffer conveyor moves on a little further to load the next section. This allows the drum to be filled evenly and to as full an extent as possible. High performance and an optimal drying degree are achieved, and imbalance is prevented even at maximum spinning speed. 

The buffer conveyor of the K850 drying system from KRONEN has an optional pivot bracket – the belt can be moved in and out safely and quickly by a pivoting movement
Pivot point mount

A pivot point mount is optionally available for the buffer conveyor belt, by means of which the belt can be fixed to the floor on the side of the washing machine discharge. This means that it can be swiveled out of or into production position by means of a simple rotary movement. This makes cleaning easier and ensures that the belt can be quickly and accurately locked into the docking station.

The K850 drying system from KRONEN can be equipped with an optional pre-dewatering station which is attached to the buffer conveyor
Preliminary dewatering on the buffer conveyor

A blower can be optionally attached to the buffer conveyor belt to pre-dewater the product. This increases the capacities or the drying performance of the centrifuge.

KRONEN SMART Factory, SMART Machines: In future, wherever production managers, technicians or foremen might be, they can check the production status of the machine or line on a laptop or mobile end device at any time
SMART Solutions for intelligent, networked production

KRONEN uses its SMART option to provide communication-enabled machines and processing lines. Wherever production managers, technicians or foremen might be, they can use these solutions to check the production status of a machine or line on their laptop or mobile device at any time. The collected data can be used to make production processes even more transparent and efficient, for example with regard to productivity, flexibility, quality and safety. Do you have special requirements? We can develop an individual, tailor-made solution for you.

SMART Solutions

up to 5,000 kg/h
Loading type

The capacity depends on factors such as the product.

Electrical power Power 17 kW
Voltage 3~400 V N/P
Frequency 50 Hz
Air Working pressure 5-6 bar
Dimensions LxWxH angled: 8000 x 6500 x 3400 mm, straight: 11000 x 3300 x 3400 mm
Weight 850 kg
Infeed/placement height 750 mm
Outfeed/delivery height 1,300 mm
Miscellaneous kg per batch 50 kg
Spin speed max. 660 rpm
Spin time 5–30 sec.
Total cycle 35–60 sec.
Total volumes 200 l
The data indicated are standard information. In addition, adaptation to other supply networks (e.g. 230V/60 Hz) is optionally possible (except for manual and pneumatic machines). Subject to changes.

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