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Be the first to receive new additional machines in your mailbox with any of the following features.
Schouten Kwartet potato sorting machine
Compas AS60 HL potato sorting machine with 4+1 sortings
Demco potato sorting machine
Schouten SMA 100/100 sorting machine for flower bulbs and Brussels sprouts
Compas AS120 S4 sorting machine for flower bulbs and Brussels sprouts
Schouten potato sorting machine with Demco hopper
Compas potato sorting machine
- Sold under reservation
Perfect -EU- sorting machine for flower bulbs and Brussels sprouts
- Sold under reservation
Perfect EU sorting machine for flower bulbs and Brussels sprouts
Perfect EU sorting machine for flower bulbs and Brussels sprouts
Holaras AS-10 ENC onion neck topper
Total Systems Bercomex Potveer sorting machine for flower bulbs and Brussels sprouts 160 cm wide bin sorting line for flower bulbs, potatoes, onion and brussels sprouts
Schouten Rollensorteerder 120 cm
Holaras AS-15 onion neck topper
V-55-14R Brushing machine with soft brushes
V-55-14R brushing machine
- New machine
V-55-10R brushing machine new, with 10 brushes
- New machine
Brushing machine new, 110 cm wide
- Quality equipment
- Skilled personnel
- Worldwide delivery
- Since 1977
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About second-hand Potato sorting machines
Today, the market expects a high-quality and uniform product, both for consumption and seed potatoes. To achieve this result, the use of machines has become increasingly essential—not only for growing potatoes but also for sorting them.
Using a potato sorting machine significantly increases the yield of potatoes, as more potatoes end up in a better-paid trade size.
On this page, you will find all the potato sorting machines we currently have in stock. From shock to roller sorters and from small sorting machines to complete potato sorting lines—you’ll find it all at Duijndam Machines. On the page of a specific potato sorting machine, you will find extensive information, including photos and videos. Still have questions? Feel free to contact us so that one of our specialists can assist you!
Types of Used Potato Sorting Machines
To sort potatoes by size, different types of potato sorting machines are used. These can be divided into three main categories:
- Shock Sorters
- Roller Sorters
- Optical Sorters
The first two variants range from simple versions for small growers to complete sorting lines. Optical sorting machines, due to their technical complexity, are primarily suited for large-scale operations.
Potato sorting machines can be used as standalone units or integrated into a complete sorting line, complemented by additional equipment such as roller inspection belts, waste removal conveyors, and box fillers.
Used Shock Potato Sorters
The most commonly used potato sorting machine is the shock sorter. This machine operates using shaking screens, through which potatoes are propelled by a vibrating motion. As the sieve holes gradually increase in size, the potatoes are sorted from small to large.
One key advantage of shock sorters is that the sieves can be easily exchanged for different sizes, allowing you to meet varying demands. Additionally, this type of machine is often suitable for sorting other similarly shaped products, such as onions.
Within shock sorters, there are three main types:
Box Sorters
Potatoes fall directly into boxes after passing through the sieve. This method is ideal if you store all or most of your product in boxes.
Bunker Sorters
Similar to box sorters, but instead of falling directly into a box, potatoes are stored in a bunker.
Step Sorters
Unlike box and bunker sorters, which move potatoes horizontally over the sieves, step sorters use a vertical movement via a "step" system. Potatoes are lifted first, and then sieves gradually descend in a stair-like manner. The advantage of this system is that it utilizes height, reducing the required floor space.
Used Roller Potato Sorters
Roller sorters use a different technique but achieve the same sorting function. Instead of shaking screens, these machines use rotating rollers to move the potatoes. As the gap between individual rollers gradually increases, the largest potatoes remain on the rollers the longest.
A key benefit of roller sorters is their compact size, though their capacity is somewhat limited. This makes them particularly suitable for smaller-scale sorting operations.
Optical Quality Inspection for Potatoes
Traditionally, both seed and consumption potatoes have been sorted by size and then manually inspected before being stored or sold. However, optical potato sorters are becoming increasingly popular.
As the name suggests, an optical potato sorter uses cameras to sort potatoes based on visual characteristics. This allows sorting not only by size but also by external quality factors, eliminating the need for manual inspection on a roller belt.
However, optical sorting technology is still relatively young and complex. As a result, optical potato sorting machines are significantly more expensive than shock or roller sorters.
Complete Potato Sorting Lines
Potato sorting machines can be purchased as standalone units, but they can also be bought or custom-fitted as part of a sorting line. A sorting line may include components such as:
- A conveyor belt to transport the potatoes
- A brush machine to clean off dirt
- A pre-sorter
- A box tipper to empty storage boxes
When investing in a potato sorting line, it's important to consider various aspects such as supply, storage, pre-sorting, and packaging. Additionally, ensuring that all components are compatible in terms of capacity is essential for an efficient sorting process.
If you are looking for a potato sorter to integrate into your sorting line, compatibility with your existing machinery is crucial. Not sure if a machine fits your setup? Contact us for expert advice!
Popular Potato Sorting Machine Brands
Several manufacturers supply potato sorting machines. At Duijndam Machines, we mainly stock potato sorters from Compas, Schouten, and Perfect. These brands are popular due to their reliability and the availability of spare parts for maintenance.
Schouten potato sorting machines come in various models, including both roller and shaking screen sorters. Schouten also offers additional machines to expand your sorting line, such as pre-sorters.
How to Find the Right Used Potato Sorting Machine
On this page, you can browse our available used potato sorting machines. Use the filter on the left side to refine your search by brand or application. Each machine’s product page provides detailed information, including photos.
Interested in a specific machine? You can easily request more information or a free quote. Want to be absolutely sure before purchasing? Feel free to call us or visit our facility to inspect the machine in person. Seeing the machine firsthand will give you the best impression of its condition and functionality. We’re also happy to provide expert advice on which potato sorting machine best suits your needs.
How We Work at Duijndam Machines
At Duijndam Machines, we always strive to maintain a large and high-quality inventory. Typically, we stock around 1,400 used machines. Our philosophy is that the machines we sell should be reliable and last for years.
Our focus on quality starts with careful selection. Once we acquire a machine, it undergoes a thorough inspection, cleaning, and any necessary repairs. Meanwhile, we upload clear photos and descriptions on our website so that potential buyers can make informed decisions.
Once you've found the right machine, we can arrange worldwide delivery to your location. Are you interested in one of our potato sorters? Contact us today for personalized advice!
Frequently asked questions about Potato sorting machines
What is the difference between a roller sorter and a shaking sorter?
The principle of both types of sorting machines is the same: the spaces between the sorting elements gradually increase, allowing potatoes to be sorted from small to large.
- A roller sorting machine uses rollers with progressively wider gaps between them.
- A shaking sorter, on the other hand, uses vibrating sieves, with holes that become gradually larger. A shaking sorter allows you to sort based on the square size (width and height).
In the potato trade, square size is the standard sorting method. With a roller sorter, sorting is based only on the smallest side of the potato. That’s why roller sorters are often used as a pre-sorting machine.
How is the square size of a potato measured?
The size of a potato is determined by measuring the shortest side of the tuber, as this determines whether it will fall through a sieve opening. To check if a potato is larger or smaller than, for example, 55 mm, its cross-section is considered. However, this doesn’t mean that measuring the diameter defines the size. If the potato fits within a 55 x 55 mm square, it will fall through the sieve — regardless of its length.
Can any potato sorter be part of a complete sorting line?
Yes, almost any potato sorter can be integrated into a sorting line.
For example, by placing a dosing bunker or elevator conveyor before the sorting machine to ensure controlled feeding. After sorting, additional equipment such as a buffer bunker, box filler, conveyor belts, or weighing machine can be added for further processing or temporary storage.
Optical sorting machines or roller inspection belts are also often part of a full sorting line to grade potatoes by quality.
What is the best brand of potato sorting machine?
Several manufacturers produce high-quality sorting machines. Some well-known Dutch brands for square-size potato sorters include:
- Dijkstra
- Tolsma-Grisnich
- Bijlsma Hercules
- Schoute
The best machine depends on the type of sorter you need and your specific requirements.
How does an optical sorting machine for potatoes work?
An optical sorter uses cameras and sensors to grade potatoes based on quality and/or size. Optical sorters can make roller inspection belts or mechanical size graders redundant. Specifications and sorting capabilities vary per machine model.
Can the sieves in a shaking sorter be changed?
Yes, in most shaking sorters, the sieve decks are interchangeable, allowing you to adjust the machine for different size ranges.
Can a potato sorting machine also be used for other products?
Most potato sorting machines can also be used to sort similar-shaped products, such as onions, flower bulbs, or Brussels sprouts. However, for onions and flower bulbs, the machine needs to be fitted with special sieve plates, often covered with rubber coating to prevent damage.
Which potato sorter is the most cost-effective?
The price of a used potato sorting machine depends on several factors, including specifications, condition, age, and capacity. In addition, market demand for a certain type of sorting machine can influence pricing. Therefore, it is hard to pinpoint one exact type of sorting machine as the most cost effective.