The Waaslandtunnel – also known as the Sint-Anna Tunnel – is Belgium’s oldest traffic tunnel. For 92 years, it has connected the left and right banks of the Scheldt River. Today, this iconic tunnel is undergoing a major renovation led by BESIX.
A crucial part of the works is the renewal of the ventilation system. During the renovation, the work zones must remain well ventilated to ensure a safe and fresh working environment for the construction crew.
The challenge
During the renovation, the existing ventilation system could not remain operational. Therefore, a temporary, reliable, and powerful ventilation solution was needed to extract both dust and harmful gases from the tunnel.
Our solution
At Slingerland Techniek, we collaborated closely with BESIX and provided a complete rental package of temporary ventilators:
Key specifications
Thanks to this setup, the tunnel was optimally ventilated, allowing the renovation work to proceed safely.
The result
A fresh, safe, and productive working environment for the BESIX crew.
With minimal installation effort, a maximum ventilation effect was achieved — exactly what Slingerland Techniek stands for.
Thanks to BESIX
A special thank you to the entire BESIX team for their trust in our solutions. We are proud to contribute to such an iconic Belgian infrastructure project.
Available Again Soon
In 10 weeks, these fans will be available again in our rental fleet.
So, does your project require temporary tunnel ventilation or industrial air solutions?
Contact Slingerland Techniek – we provide powerful and reliable fans for rental.
When welding stainless steel, not only welding fumes are released, but also warm air that would normally be lost. Instead of simply exhausting this heat, we developed a system that recovers and reuses the energy. This ensures a well-ventilated workspace without unnecessary heat loss. In addition, the installation was designed to be flexible — the extraction system for 17 workstations automatically adjusts to the number of active stations.
How does the system work?
In collaboration with Miltech, we installed a heat recovery system that includes:
✅ A Sult filter unit that efficiently captures welding fumes.
✅ An extraction fan that removes contaminated air.
✅ Two plug fans that blow clean air back into the workspace.
✅ A heat exchanger that uses the exhausted heat to preheat incoming air.
✅ Valves combined with a control system to maintain optimal balance between extraction and supply, regardless of how many workstations are in use.
What are the benefits?
Thanks to this system, approximately 16,000 m³/h of air is refreshed without significant energy loss. This ensures a healthy working environment and a lower energy bill. Additionally, the installation automatically adapts to the situation, so air is never extracted in excess of what is needed.
The challenge
The client wanted to replace an outdated filter unit with a fully functional air handling unit. Key requirements included:
The solution
We designed a sound-optimized, custom air handling unit with vertical intake and horizontal discharge. The system consists of three separate components and is engineered for easy on-site assembly.
Key specifications
This project demonstrates how we don’t just supply fans, but engineer complete air solutions — efficient, space-saving, and fully tailored to the customer’s needs.
At Slingerland, we specialize in delivering high-quality, custom-made solutions for industrial applications. One of our recent projects involved providing a fully stainless steel fan, specifically designed to handle high temperatures of up to 350°C. This project was for a client who develops industrial machines for heating and pre-frying French fries.
To meet the extreme conditions, we designed a double-walled stainless steel fan. This structure includes a standard stainless steel housing, with 60 mm of thermal insulation added, and a second stainless steel housing welded around it. This construction ensures that the fan’s bearing block and motor are better protected from the high temperatures transported through the fan.
Due to the high temperatures, we deliberately avoided using a direct-drive fan, as it would significantly shorten the motor’s lifespan. Instead, we opted for a type 8 configuration, where a bearing block is placed between the motor and the stainless steel housing. This not only extends the lifespan of the fan but also reduces strain on the motor.
In consultation with the client, we chose stainless steel 316L for the motor mount, frame, and the entire fan housing. This was a critical choice, especially in the food industry, where stainless steel 316L is essential for its hygienic and corrosion-resistant properties. Additionally, the fan is equipped with a double-walled inspection hatch with thermal insulation to prevent heat loss.
For added efficiency and stability, the fan features heat-resistant stainless steel inlet and outlet flexible connections, as well as vibration dampers. This ensures vibration-free operation, even under extreme temperatures. The fan is powered by a 5.5kW 2-pole WEG motor, capable of moving 3800 m³/h of air at a pressure of 1356 pascal, even at 350°C.
Thanks to our expertise in stainless steel fans, our client was able to deliver a machine that meets the highest industrial standards. Slingerland is your partner for custom stainless steel fans designed to withstand the toughest conditions. Are you looking for a reliable solution for high-temperature applications? Contact Slingerland today for custom stainless steel fans tailored to your specific industrial needs.
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We recently supplied a high-quality, fully stainless steel fan to a leading machinery manufacturer in the food industry. The choice of a stainless steel fan was crucial in enhancing durability, corrosion resistance, and hygiene—key factors in the demanding environments where the company operates.
Previously, we had delivered a swing-out stainless steel fan for this client, but with a standard steel-coated motor. Seeking an even higher level of quality, they opted for a stainless steel motor paired with a stainless steel swing-out centrifugal fan.
A fully stainless steel centrifugal fan offers numerous benefits, particularly in industrial and demanding environments where durability and corrosion resistance are essential.
The implementation of these stainless steel fans, including the stainless steel motor, has delivered significant benefits for our client in this project. By meeting the specific requirements for durability, corrosion resistance, and hygiene, we contributed to the successful execution of a high-quality machine. While this stainless steel fan may involve higher initial costs, the advantages in terms of longevity and ease of use far outweigh the investment. Choosing this complete stainless steel fan remains a sustainable and cost-effective solution for demanding environments.
Are you interested in stainless steel fans that meet the highest standards of durability, corrosion resistance, and hygiene? For more information and to discuss your specific needs, we invite you to contact Slingerland Techniek. Rely on our expertise and high-quality products for the successful integration of stainless steel fans into your projects. Contact us today and discover how Slingerland Techniek can fulfill your ventilation needs.
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In a factory where extensive welding takes place, maintaining optimal air quality is crucial for both the health of employees and the efficiency of the production process. For one of our valued clients, a leading provider of welding fume extraction in the metalworking industry, we faced the challenge of improving air quality in their workshop, where welding fumes were a constant concern.
After a thorough analysis of their needs and the complexity of their production process, we concluded that traditional ventilation systems were insufficient to effectively remove welding fumes. Together with our client, we decided to implement an innovative approach by installing roof fans in combination with an air handling unit for fresh air.
The results were remarkable. Our client immediately noticed a significant improvement in the air quality within their workshop, leading to a healthier working environment and increased productivity.
We are proud to reflect on this project and collaboration. By combining our expertise with the vision and needs of our client, we created a solution that not only meets current demands but is also prepared for future challenges.
If you are looking for roof fans for your workshop, we are ready to assist you. For more information and to discuss your specific needs, we invite you to contact Slingerland Techniek. Rely on our expertise and high-quality products for the successful integration of roof fans into your projects. Contact us today and discover how Slingerland Techniek can meet your ventilation needs.
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We are excited to share a recently completed project, executed in collaboration with our valued client. This remarkable project took place at a royal company specializing in the seed breeding of vegetables and fruits.
The company was facing significant dust formation on their production line, a common issue that needed to be addressed to ensure the efficiency and safety of their operations. Our client was tasked with providing an effective filtration system, and Slingerland Techniek was proud to assist by supplying heavy industrial fans.
Our solution involved the installation of larger, horizontal centrifugal fans mounted on top of the dust filters. In total, seven filters were installed, each equipped with a TR1122 centrifugal fan. These single-inlet medium-pressure fans are perfectly suited for the specific demands of this project, offering a capacity of 25,000 m³/h of air and a pressure of 4260 Pascal. The fans are powered by robust 4-pole 45kW WEG motors.
Thanks to this installation, the dust issues on the production line have been significantly reduced, resulting in a cleaner and more efficient working environment. We are proud of our collaboration with Miltech West and the contribution we have made to this prestigious project.
This project once again highlights our commitment to delivering high-quality solutions and our ability to meet the specific needs of our clients. We look forward to future projects where we can continue to apply our expertise and innovative solutions in industrial fans.
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One of our customers, a company specialising in development, construction and maintenance of thermal drying processes received a question from a customer of theirs from the wood industry. Wood chips and sawdust are a source of energy, provided they are sufficiently dried and packaged in a manageable manner. So our client was commissioned to develop a dryer suitable for drying wood chips and fibres sufficiently on a belt dryer. The moisture in the wood chips is reduced so that it can be packed and transported better. This dryer was to be heated using a biofuel-fired furnace.
Input moisture concentration of the material was 55% and output moisture concentration only 12%. The dryer has a capacity of 7500 kg per hour.
Therefore, to carry out this drying process efficiently, sufficient air is needed to dry the material efficiently. It was decided to manufacture the heavy-duty centrifugal fans entirely from steel. Due to the high relative humidity in the medium, the choice was made to apply a high-quality customer-specific coating system suitable for this medium.
In this project, a low noise level was desired for the house radiation and appearance in the press side. To achieve this, centrifugal fans with a low 6-pole speed and adapted material thicknesses were chosen. To reduce the noise level in the press side, coulisse dampers, manufactured entirely from stainless steel 304, were chosen.
Volume: 100,000m3/h |Static pressure: 1420Pa
Slingerland Techniek understands that it is difficult for companies to indicate exactly what they are looking for. To provide companies with the best possible service, we look at the business situation together. The possible solutions are then discussed so that we can solve your business problem in full consultation.
Do you recognise yourself in this problem and would you like to discuss your own situation with our specialists? Then contact us today!
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Upon registration you will immediately receive a welcome offer!
The customer is a large industrial bakery that produces a wide range of bakery products and needs efficient extraction to ensure the high quality of the final product. At this facility, they make various types of pastry bottoms from yeast doughs and sand doughs. They then offer these both unfilled, semi-filled and fully filled, from unfilled tartelet to ready-made flan.
The customer was looking for a new solution for the extraction of one of their production lines. In this line, it was important to have sufficient extraction, allowing them to extract unnecessary dust and control the high humidity. This would allow them to improve the quality and shelf life of their finished product.
We worked with our client to advise the end user to take a plastic centrifugal fan P354, including a plastic impeller and motor mount equipped with a swing-out option to allow proper cleaning of the fan at the end of the day.
The fan was equipped with a WEG motor of 0.55 kW B5 design. The fan’s PP impeller and PE housing made it corrosion resistant and suitable for use in humid environments. To address the problem of condensate build-up, the fan was equipped with a condensate drainage system that prevented moisture build-up and ensured that the system remained dry even after cleaning.
The fan’s frequency control allowed precise control of fan speed, which not only contributed to energy savings, but also allowed the customer to adjust the airflow to their specific requirements. To ensure the fan’s durability and ease of maintenance, we added additional components, including a motor foundation with a swing-out system made of stainless steel304, a stainless steel304 mesh grille on the discharge side, a flexible connection for the suction side, an ABB operating switch and 4 vibration dampers.
Are you struggling with a similar problem in your company? If so, please feel free to contact us for no-obligation advice. We not only have plastic centrifugal fans in our range, but also numerous other fans, and would be happy to discuss the possibilities with you. See you then!
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Our client is a specialist in the field of industrial furnaces and thermal processes for industry. Their extensive knowledge and experience, together with advanced technologies, enable them to meet specific customer needs and deliver consistently high quality. From standard concepts to customised solutions, small batch ovens to large inline ovens, they offer a wide range of products. Furthermore, depending on the customer, the temperature range of the ovens ranges from 40°C to 1800°C.
For a recent project in America, 2 industrial furnace fans had to be supplied to withstand high temperatures. Designed specifically for the industrial furnace industry, these high-temperature fans are the ideal choice for efficiency and reliability.
The 2 centrifugal fans have a standard coating in RAL 5017 and are suitable for 22kW 6-pole and 3kW 6-pole motors, respectively. In addition, both fans are equipped with housing insulation and a reduced impeller for 60Hz. This is of great importance as the fans are installed in America. Furthermore, the large fan has a discharge position in LG270 and the small fan in LG0.
Our fans are supplied with 2 Techtop e-motors of 22.0kW and 3kW. The special version is designed for use in industrial applications with a voltage of 3x480V-D-60Hz and has CSA/UL certification and IP55 protection. The motors are made of cast iron and equipped with PTC sensors.
Our client offers a wide range of high temperature fans for the industrial furnace industry. Whether standard or customised, small or large batch furnaces, they have the right solution for your specific needs.
Slingerland Techniek understands that it is difficult for companies to indicate exactly what they are looking for. To provide companies with the best possible service, we look at the business situation together. The possible solutions are then discussed so that we can solve your business problem in full consultation.
Do you recognize yourself in this problem and would you like to discuss your own situation with our specialists? Then contact us today!
