Erik de Graaff started as Sales Director at Van Aarsen International

We welcome Erik de Graaff as our new Sales Director.

Erik developed from Salesman to General Manager and Sales Director, with both national and international responsibilities.

During his career he worked in different industry fields, both national and international, but the majority of his working years he has been active in the area of solids handling and processing in several industries like (pet-)food, plastics and the chemical industry. The last decade he has been in the area of pelleting, grinding and conditioning in, amongst others, the animal feed industry.

This specific knowledge and his broad experience has given the Van Aarsen management team enough confidence to appoint him as the new Sales Director.

Erik intends to strengthen the global position of Van Aarsen as one of the leading companies in feed mill design and construction. By strengthening the agent network, creation of partnerships with customers and further development of the sales team, his aim is to secure the continuous growth of Van Aarsen

He is proud to be part of an experienced group of experts, and is always striving to serve our global customers in the compound feed industry to his best abilities!

Subramanian Pitchai joins Van Aarsen as Area Sales manager for India, Nepal, Sri Lanka and Bangladesh.

We welcome Subramanian Pitchai as the new Area Sales Manager catering to India, Nepal, Sri Lanka and Bangladesh. Over the last 11 years he gained a lot of experience in the feed industry.  He has been working as a Manager at a leading Poultry Integrator and an MNC in India for the past 11 years, with always a service and support component in his daily life.

Dedicated to give you the best support

Subramanian about his appointment: “I am happy to be a part of Van Aarsen and look forward to work with you and provide solutions that meet your requirements about feed mills, production lines as well as separate process machinery. Together with my team of engineers I can give you the kind of service you need and expect.”

Visit to Van Aarsen as part of the production course at the Feed Design Lab

Today 12 members of the Bristol Corn & Feed Trade Association visited Van Aarsen to learn more about the feed production process and how this influences the nutritional value of the feed. They attended a Production course at the Feed Design Lab, who organized the visit to Van Aarsen as part of the course.

After an introduction of Van Aarsen,  the main machines used for feed production were presented.  This was followed by a presentation of Hans Boonen explaining the influences of machine choices  on the nutritional value and physical characteristics of the end-product

We were pleased to notice that all attendees were very impressed by the fact that Van Aarsen is not only a quality machine supplier but also holds a high level of knowledge about the animal feed production process.

We love to share this knowledge with our customers as we at van Aarsen believe that sharing know-how and co-creation are essential in finding the perfect fit that give our customers a competitive edge.


Step into our virtual feed mill!

How to maximize grinding efficiency and reduce costs

Van Aarsen features the GD hammer mill with an automatic screen exchange system and frequency controlled motor, being the ideal solution to combine optimum grinding results with high grinding efficiency.

Hammer mills are used to grind the raw materials for animal feed. The raw materials are fed into the hammer mill where the impact of hammers rotating at high speed breaks them down into small particles. The efficiency of the grinding process depends on a number of variables, such as the breaker plate design, the hammer tip speed and the screen perforation.

Large breaker plates for optimal grinding efficiency

Van Aarsen designed its first breaker-plate hammer mill more than 65 years ago. The current hammer mill is equipped with a large breaker plate in the upper section of the grinding chamber: this exposes the product in the grinder to multiple impacts. Nowadays, this design is generally considered to be an extremely effective way of achieving high quality and grinding efficiency. The right particle size is achieved through the multiple impact action in the top section of the chamber, after which the ground product exits the mill through the screen at the bottom. This design avoids circulation of the ground product in the grinding chamber, which would reduce efficiency and cause an excessive amount of fines. The longer service life of the screens and hammers is an additional benefit.

Screen perforation and open area

The screens have a direct effect on end-product quality and the hammer mill’s capacity. The combination of the perforation size and open area (the number of holes) in a screen determine the particle size, particle variation and the grinding capacity. How larger the perforation opening, the coarser the ground product. How larger the open screen area, the greater the mill’s capacity.

Hammer tip speed

In addition to the screen perforation, the hammer tip speed also plays a role in determining the particle size of the ground product. A higher tip speed means a higher impact and will result in a finer grind. A lower hammer tip speed results in a ground material with a coarser structure. At the same time, the capacity of the hammer mill will seriously decrease. There is no such thing as one ideal tip speed; this setting depends on the base ingredients and the desired end-product. The hammer tip speed can be controlled via a frequency controller and this also influences the fineness of the grind.

Consistent use of the right screen and tip speed for optimal quality, speed and energy consumption

The desired quality, speed and energy consumption can be accurately managed through consistent use of the right screen. An automatic screen exchange system soon pays for itself when multiple screen perforations are used. Van Aarsen offers an automatic screen exchange system that holds 3 different screen perforations. Depending on the recipe in use, the screen exchange system automatically positions the right screen plates in the hammer mill screen holder, thereby reducing the screen changeover time from 20 minutes to just 1 minute. This results in a much higher grinding efficiency, capacity and reduced labor.

For full flexibility, an automatic screen exchange system can be combined with a frequency controller which regulates the hammer tip speed. By adjusting the hammer tip speed to suit the screen perforation, the ideal setting can be chosen for achieving the right particle size and variation while maintaining capacity at the desired level and keeping the energy consumption per ton of feed as low as possible. Van Aarsen’s GD hammer mill with the automatic screen exchange system is characterized by a low energy consumption of approximately 7 kWh/ton.

Automatic screen exchange – grinding efficiency

Intelligent design and low maintenance costs

In addition to the factors mentioned, the quality and position of the hammers, the feeding device and aspiration system also affect hammer mill performance. Thanks to intelligent design, Van Aarsen’s GD hammer mill scores well in all these areas.

  • One of the unique features of Van Aarsen hammer mills is that the hammers can be rotated or replaced quickly and easily by a single person.
  • The staggered hammer pattern increases the contact area and therefore grinding efficiency. The distance between the hammers and the screen is 25 mm. This prevents product from circulating in the grinding chamber and the resulting energy loss.
  • The hammers used for the GD hammer mill are robust and have a long service life. They only need to be replaced when all 4 sides are worn. In combination with the wear-reducing breaker plates, the cost for the hammers amounts to less than 3 euro cents/ton of feed.
  • The feeding device must deliver a steady flow of the raw materials. Because different materials have different grinding characteristics, a frequency control on the feeding device of the GD hammer mill always ensures the correct supply.
  • As standard, the feeding device is equipped with a magnet and can also be equipped with a heavy parts separator for optimum safety and a longer lifetime of the screens.

With its compact design Van Aarsen’s GD hammer mill with automatic screen exchange can be integrated in new and existing situations.

Grinding: an essential process step

The feed production process has a significant impact on the nutritional value of animal feed. Grinding the raw materials to the required structure is an essential operation which affects both pellet quality as well as the animals’ digestibility. Size reduction increases the number of particles and the surface area per unit of volume which results in increased mixing homogeneity. In addition a finer grind has a positive effect on starch gelatinization which leads to improved pellet quality and increased pellet mill capacity.

Pelleting’s role in producing effective feeds

How to ensure your feed contains all the right ingredients?

Some of the ingredients in animal feed, contain food already suitable for human consumption. This challenges feed millers to make sure the final feed is containing all the right ingredients to become an effective feed for the benefit of the animals and the food on the table!

Pelleting is a well-known process in the compound feed industry. The transformation of feed meal into pellets has benefits regarding nutritional properties and logistic handling of the end product. Because the meal is formed into pellets after mixing of the ingredients, each pellet contains the nutrients as specified by the nutritionist. This prevents selective eating of the animals, ensuring each animal will consume a balanced diet.

Pelleting of the feed also improves the logistic properties of the compounded feed. The pellets have a higher density then feed mash, enabling more feed to be transported in the same shipment. Furthermore, the dust formation in the product handling is significantly reduced, resulting in reduced (cross) contamination through the entire logistic process.

Determining factors while pelleting

The key of an efficient pelleting process is to determine the optimal compromise between energy consumption and pellet quality, while producing the desired capacity. Many factors are of influence on the pelleting process, from the recipe, to conditioning parameters, roller gap distance and pellet mill die specifications:

  • By adding more steam, gelatinization is improved and the meal can be pelleted better. This results in a higher capacity, improved quality and less energy consumption.
  • By increasing the roller gap distance to the die a higher quality can be realized because more pressure (mechanical energy) is applied. This will however have a negative effect on capacity and energy consumption as more power is needed to force the meal through the die. The same effect can be achieved by changing to a die with a larger die thickness.

There is a limit to the quantity of steam that can be added as too much steam addition can cause roller slip. The consequences of a roller slip are severe. Operators are always very cautious for this because – in worst case scenario – it will not be possible to get the die to pellet again. When the die needs to be replaced, it takes at least one hour. This is why many feed millers tend to load the pellet mill on the safe side.

Also the frequent adjustment of the rollers is often skipped. Changing the roller continuously by hand would negatively influence the required capacity.

A new generation pellet mills

Van Aarsen has launched a new generation of pellet mills with motor-operated roller adjustment and active roller slip control. This means that Compound feed manufacturers can always produce exactly the correct pellet quality with one push of a button. Moreover, with the new CU Dynamic pellet mill, producers can prevent downtime caused by the mill becoming blocked. This can result in a 15% increase in production capacity.

Recipe controlled roller gap distance

Van Aarsen developed the new CU Dynamic pellet mill with motor-operated roller adjustment especially for compound feed manufacturers who have to make regular recipe changes. With this new pellet mill feed producers can set optimum roller distance to the die with one push of a button. Thanks to a link to the factory automation system it is possible to select the correct roller setting automatically for established recipe settings. This means the recipe can be changed quickly and easily. As the mechanical energy factor can also be determined by setting the roller distance, the die (thickness) does not have to be changed as often. This also helps reduce downtime.

Reducing downtime due to roller slip

The new CU Dynamic pellet mill is equipped with an active roller slip control system. When the rollers slip and the mill threatens to become full, the system detects the slip and takes immediate action. The active roller slip control presses the rollers immediately against the die, preventing the rollers slipping and the meal accumulated in front of the roller is milled away. The control system reduces downtime due to roller slip by 95%. If the mill stops due to another overload, the rollers can be retracted by the motor-operated roller adjustment and pressed against the die after start up so that the mill operates again quickly. The motor-operated adjustment of the rollers is even possible while the pellet mill is in full operation.
With this active roller slip control the operator is offered the opportunity to experiment with the roller distance and steam addition for the recipes to boost the feed quality and production efficiency. Operators can rely on this system while exploring the settings for the most optimum production.

Reduced feed costs

Feed costs are mainly determined by a few components: the cost of raw materials, labor costs, energy prices, and depreciation, modernization or reinvestment in milling facilities. Feed millers globally are challenged to optimize performance, minimize energy consumption and lower maintenance costs and unplanned downtime.
Also here the new generation pellet mill helps feed millers by lowering maintenance costs. The Van Aarsen CU Dynamic pellet mill is equipped with a die cleaning mode so that the operator can clean the die easily whenever he wants. The meal does not have the opportunity to cake onto the die, which results in a quick start-up of the pellet mill. As the rollers retract automatically after each product, there is less wear of the die and rollers and their life is increased by up to 30%.

Payback time less than two years

The new CU Dynamic pellet mill by Van Aarsen International from Panheel (the Netherlands) increases flexibility and pellet quality and reduces downtime. This results in an increase in production capacity and also savings on maintenance and equipment. If required, existing Van Aarsen mills can be upgraded to the new advanced CU Dynamic.

Want to know more? Please contact us

Visit us at the Livestock Philippines 2017

We’d be happy to welcome you on our stand at the Livestock Philippines.
Curious? You can find us at:

Hall 3 stand J107
May 24-26 2017

Looking forward to meet you

Your dedicated Van Aarsen sales representatives will be present to help you with any question you might have.

Van Aarsen
Jos van de Berg

Philippines Van Aarsen Pacific
Mr. Niel Romero


Visit us at the Indo Livestock Indonesia 2017

We’d be happy to welcome you on our stand at the Indo Livestock.
Curious? You can find us at:

Ground floor, stand AE07
May 17-19, Surabaya

Looking forward to meet you

Your dedicated Van Aarsen sales representatives will be present to help you with any question you might have.

Van Aarsen
Jos van de Berg

Indonesia Jabar Mulia Engineering
Mr. Suherman
Mr. Cornelius


Van Aarsen: winner of the E-Novation award for new feeding device for the GD Hammer mill during VIV Asia

Van Aarsen celebrates a successful day at VIV Asia. Winning the e-novation award makes us proud. It proves that our innovations are valued in the market place.  As Van Aarsen, we invest continuously in new developments. This is how we help our clients face challenges of lowering costs, improving quality and maximizing performance.

New feeding device for the GD Hammer mill

The new feeding device is the result of developing new techniques for minimizing explosion risk without compromising the efficiency and quality of the grinding process. The innovative feeding device integrates a heavy parts separator for metal objects, stones, and other heavy objects. The heavy parts separator detects such objects and removes them to prevent them from being fed into the hammer mill and causing sparks.

Besides minimizing the risk of explosion, Van Aarsens new feeding device with heavy parts separator also prevents damage to the screens. This greatly increases the service life of the screens and significantly reduces machine downtime and maintenance.

The new feeding device has a compact design and can easily be integrated into the GD hammer mill and the automatic screen exchange.

Watch the Grinding line video with the new feeding device

Van Aarsen and Wenger announce collaboration in the Aquatic feed market

Van Aarsen and Wenger have developed a collaboration framework for the realization of feed mills in the Aquatic feed market.

Wenger is a world leading producer and supplier of extrusion process systems for the Aqua feed, Pet food and Human food industry and famous for their innovation and quality.

We as Van Aarsen have built-up a broad knowledge and wide experience in every area of the compound feed technology industry and have developed into one of the world’s leading companies in feed process technology.

Van Aarsen and Wenger together have almost 150 years’ experience. The extensive knowledge and unmatched quality of both Wenger and Van Aarsen machines form the basis for building world class turnkey feed mills in the Aquatic feed market.

Besides the aqua feed market, Van Aarsen and Wenger also cooperate by sharing engineering and process experiences – leveraging key insight and opportunities for the marketplace. This enables us to fulfill the demands of producing excellent animal feed based on more complex recipes.