Case study

Centrifugal fans and coulisse dampers for a drying process

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.

Solution through 3 centrifugal fans and coulisse dampeners

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.

Specifications centrifugal fans

Volume: 100,000m3/h |Static pressure: 1420Pa

WEG E motor 75kW/6p/IP65/C5 coating/NU bearings/insulated bearing shield
2-fold split casing for easy maintenance
inspection doors
condensation drain 2″
shaft sealing with carbon rings
speed sensor with detection ring
fan made of S355J2/S690QL
class IIV impeller made of stainless steel 304
impeller fitted with counter blades
special coating system for steel parts
cooling impeller with protective cover
fixing materials SS304
impeller balanced according to G2.5 including balance report

Specificaties coulisse dampener

dimensions 2200x1750x2500
housing and flanges of SS304, fully welded
housing for wings made of 304 stainless steel
6 absorption/reflection covers
removable wings
inner perforated plate of SS304
Internal membrane due to high RH
coated on the outside for aesthetic reasons

Also in need of centrifugal fans for drying processes or another solution? Contact us!

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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Case study

Plastic centrifugal fan with stainless steel fan and swing-out option

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.

Fan for extraction of air production lines

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.

Solution with plastic centrifugal fan P354

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.

We would love to see what we can do for your business with a plastic centrifugal fan!

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!

Kunststof centrifugaal ventilator met swing out

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Case studies

Case study

High Temperature Fans for US furnace industry

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.

High temperature fans for industrial furnace industry

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.

Solution using 2 centrifugal fans

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.

Hoge temperatuur ventilatoren voor industriële ovenindustrie Amerika

Also in need of high temperature fans for a similar solution? Contact us today!

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!

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Case study

Stainless steel Centrifugal ventilator for food industry

Our client provides customised solutions for production lines in the potato, fruit and vegetable sector. They integrate and streamline machines in every step of the production process. In this industry, hygiene and quality are very important. High demands are also placed on finishing.

Fan for suction of a strawberry belt

Developing a new machine is not easy and needs to be tailor-made for a process. Our client had a request to develop a machine to automatically remove the crown from strawberries. The strawberries were placed on a belt and had to be sucked with their crown into a small hole. Several strawberries on a belt until it was full and then a knife would automatically run under it and top the strawberries. It was not easy to determine the suction here. But thanks to our engineering department, we were able to go on site and measure what would be needed in terms of suction power. This enabled us to select a suitable fan for our customer.

Solution using stainless steel centrifugal ventilator with pull-out system

In the end, we designed very high-quality stainless steel centrifugal fans with a pull-out system to remove the impellers for easy cleaning. As we use robust impellers, the hinges naturally had to be sufficiently heavy duty. We therefore provided two mounting brackets on the swing-out system and the motor plate was equipped with three quick-release fasteners. We also provided a condensation drain with G½” internal thread. This stainless steel fan was equipped with a 5.5kW 2-pole WEG motor. The fan was manufactured entirely from stainless steel 304, after which it was shot-blasted to give all welds a perfect finish. The fan was fully TIG-welded, which is also very important in the food industry.

RVS Centrifugaal Ventilator met pull-out systeem voedingsindustrie3

RVS Centrifugaal Ventilator met pull-out systeem voedingsindustrie2

RVS Centrifugaal Ventilator met pull-out systeem voedingsindustrie

Also in need of a stainless steel centrifugal ventilator for a similar solution? Contact us today!

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.

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Case study

Double-inlet centrifugal fans with backward-curved blades used for spray booth air extraction

A customer of our client wanted to install a new spray booth to be able to finish their products with the latest technology again. Here, of course, it is important to use a suitable ventilation system, such as double-inlet fans. To develop a good ventilation system, several factors need to be considered. One of these factors is the size of the spray booth and the volume that needs to circulate through it. The ventilation system must be able to effectively remove the air pollutants produced, such as paint mists and toxic gases, while ensuring air quality. Because of the toxic gases, the solution also had to comply with Atex guidelines. This is why we chose double-inlet centrifugal fans. Read more about this under the heading “solution”.

Background of the customer

Our client is a company that specialises in providing energy-efficient solutions for commercial and industrial facilities. Their offerings include energy-efficient HVAC systems, lighting systems, building automation systems and renewable energy solutions. Their goal is to help companies reduce their energy consumption and costs, improve indoor air quality and promote sustainability. By offering a wide range of energy-efficient solutions and services, they help their customers create more comfortable and efficient buildings while reducing their impact on the environment.

Solution using double-inlet fans

As a solution, we offered the customer three different double-inlet fans. Namely the VTZ 500, 560 and 710. They comply with T1A ATEX3GZ2. These double-inlet centrifugal fans are specially designed for use in explosive environments and comply with the ATEX guidelines for zone 2 (II 3 G c). The fan housing is welded and coated with 40h RAL5015 for extra protection.

The fans feature a corner frame with block bearings and a discharge flange for easy installation. An inspection hatch is also provided for easy maintenance, as well as a condensation drain to prevent moisture from sticking in the fan housing.

The maximum fan speed is 1820 rpm, 1700 rpm and 1230 rpm, respectively, and the maximum available power is 12, 17 and 22kW. The discharge position is RD/LG90 and grilles are present on both the suction and discharge sides.

Also in need of double-inlet fans for a similar solution? Contact us

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.

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Case study

Centrifugal fan in stainless steel sound attenuated housing for dust extraction system in the salt industry

One of our customers, Herding filtertechniek, a specialist company of dedusting systems for various industries, received a request from a producer in the salt industry.

In a salt tablet manufacturing process, there was a need for a dedusting system in which our customer could provide a solution by means of a Herding sinter-plate filter and Slingerland Techniek’s centrifugal fan.

Solution using centrifugal fan in sound attenuated housing

Due to the high salt load in the process and the environment, a centrifugal fan and motor with a high-quality coating system were chosen that are suitable for this salt load. The casing was also adapted to this environment by being made of stainless steel 316 panels and aluminium profiles with a suitable coating system.

Operating point & specifications centrifugal fan

Volume: 5000m3/h | Static pressure: 4500Pa

Manufactured from S355J2 steel
High-efficiency impeller with backward-curved blades
Fan casing fully welded
Equipped with special Doublezinc coating system
Fan housing fitted with inspection hatch
Fan housing with condensation drain
Stainless steel fixing materials
WEG E-motor 11kW-2p-IE3
Motor fitted with special coating system
Fan installed vibration-free in casing by means of flexible connection sleeves and vibration dampers

Sound attenuated casing specifications

Dimensions: LxWxH = 1200x1200x1400mm
Stainless steel 316 panels
Stainless steel 316 inspection door with lock and handles
Aluminium profiles with 3-layer powder coating system
Connection suction and discharge side ut RVS316, with collar connection
Akotherm acoustic insulation
Interior suction box with acoustic insulation
Suction and discharge grilles made of 316 stainless steel

Also in need of a centrifugal fan in a sound proofed casing for a similar solution? Contact us today!

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.

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Case study

2 stainless steel centrifugal fans for biogas plant in Belgium

At a large biogas plant in Belgium, the process air had to be removed and then reused in a subsequent drying process. These 2 fans were placed between the chemical air scrubber and a biobed.

Reusing process air from biogas plant in drying plant

We were recently asked by a customer if we could provide a solution for an installation to extract process air from a chemical air scrubber into a drying process. From the biogas plant, they were extracting the hot air and later wanted to use it to dry liquid digestate fermented out on a belt dryer into a dry organic manure pellet.

The solution? 2 units of stainless steel centrifugal fans with profiled blades

These heavy-duty centrifugal fans are partly made of stainless steel 304 sheet material, only the motor seat is made of normal steel and is coated. The customer was looking for a fan that could move 80,000 m3/h of air with a back pressure of only 800 pascals. The process air temperature could reach a maximum of 30° Celsius. The fan is equipped with a split housing to allow easy maintenance. The fan features backward-curved profiled blades. This high-efficiency impeller enabled us to use an electric motor of only 45kW and realise a power consumption of only 31kW.

Below is a brief description of the technical design of the fan:

WEG E-motor 45kW – 6p
Fan is frequency controlled
Fan housing fitted with an inspection hatch
Fan housing fitted with condensation drain 1″
Fan scroll external chain glass
Product contact parts made of stainless steel 304
Motor base made of steel S355J2
Class III impeller made of stainless steel 304
Impeller with backward profiled blades
Coating system motor seat A120 RAL5012 T°C <120
Minimum/maximum mechanical medium temperature: -10 to 40°C
Fan incl. motor provided with IIA declaration
Fixing materials SS304
Impeller balanced according to G2.5 including balance report
Discharge position: 1x RD270 1x LG270
Maintenance and operating instructions in Dutch language
Fan is delivered in transportable parts

Also in need of stainless steel centrifugal fans for a similar solution? Contact us

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!

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Case study

Industrial oven fans

Background

In many industries, heat is needed for the production process. For this purpose, industrial ovens are often built. Think of furnaces to bake glass sheets, furnaces to bake bricks. Even the picture tubes of the first TVs were made in ovens.

Challenge

A fan completely customized for our customer so they do not have to modify their installation. Our customer had a fixed concept of furnaces for several years and always sells this complete concept. So his wish was to leave it as it is because it has been working well for years. So we worked with him to design a complete custom solution.

Solution through industrial oven fans

Together with the customer, we ended up designing 10 pieces of free-running plug fans for his industrial furnace. Each fan does 50,000 m³/h at 1390 pascals. The fans are equipped with 37kW, 4 pole WEG motors. The plug fans have reinforced steel impellers, profiled backward curved blades. Includes aluminum cooling impeller with protective cover. Furthermore, they have an insulated mounting plate with 100mm insulation. The fans are suitable for a maximum medium temperature of 240 degrees.

Oven ventilatoren voor hogere temperaturen

Also in need of industrial oven fans for a similar solution? Contact us

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.

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Case study

February 27, 2023

Industrial fans for high temperatures

Background

Industrial fans are used in a variety of applications. In this case we describe fans used in the industrial furnace industry. There are many different types of furnace applications, think of: Annealing furnaces up to 800°C, tempering furnaces up to 300°C, forging furnaces up to 1200°C. Furnaces can be heated electrically or with burners. In electric ovens, radiation elements or convection elements can be used. For burner ovens, natural gas, propane or oil burners can be chosen. Slingerland Techniek also offers many different solutions for this industry, such as plug fans for recirculation or centrifugal fans with special cooling fans or high-quality temperature-resistant paint.

Challenge

In this case, the customer designed a furnace installation to powder coat materials. The temperatures here could reach 350°C. They needed a total flow rate of 8300 cubic meters per hour and had to be able to build up a static pressure of 296 pascals.

Solution through industrial fans for high temperatures

In this case, we offered a belt driven centrifugal fan with a fully insulated housing. The design is belt driven so that the motor would definitely not come into contact with the extreme temperatures. The black coating is special for the high temperatures. Furthermore, the fan is equipped with a graphite seal and the impeller is manufactured from corten steel.

Geïsoleerde centrifugaal ventilator voor hoge temperaturen

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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.

If you have any questions, we are happy to help. You can reach us at +31 (0)33 465 13 92 or by filling in the contact form.

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Case study

18 Integrated centrifugal fans for the production of wood dust filters

Our integrated centrifugal ventilators, version 5, recently proved to be indispensable in the production process of dust filters. Several crucial factors had to be taken into account, and in such cases, there is no better point of contact than Slingerland! Read here how we successfully resolved a challenge for a satisfied customer with our exceptional industrial ventilators.

Sustainable centrifugal ventilators with low operating costs

18 Ingebouwde centrifugaal ventilatoren voor de productie van houtstoffilters tekening render

With our centrifugal ventilators, we recently assisted a customer with a highly respected name in the production of dust filters. This company had over 70 years of experience in the agro, wood and recycling industry and offered innovative quality solutions for industrial dust extraction. The key factors? Unparalleled sustainability, high efficiency and low operating costs. With our integrated centrifugal ventilators, version 5, we could certainly deliver!

High-efficiency horizontal centrifugal ventilators required

In close cooperation with the customer, Slingerland searched for high-efficiency centrifugal ventilators that could also be installed quickly and efficiently. This saved time during the construction of their filter systems, namely when the horizontal centrifugal ventilators were mounted in the clean side of the filter. Easy to assemble, easy to maintain and high quality!

The solution? Version 5 centrifugal ventilators that are quick to install

The horizontal centrifugal ventilators we selected were equipped with B5 motors, which could be easily mounted on the ventilator housing with a flange. In addition, we equipped this version 5 centrifugal ventilator with a frame on the underside so that it could be easily mounted via the top of the filter.

The customer then provided its own cone, which connects the inlet of the integrated centrifugal ventilators directly to the filter section below the clean air side. There, the horizontal centrifugal ventilators could draw in the air through the filter sleeves, thus filtering the air from the process. In addition, these horizontal centrifugal ventilators were all frequency-controlled and of excellent quality.

18 Ingebouwde centrifugaal ventilatoren voor de productie van houtstoffilters

Are you also searching for integrated centrifugal ventilators? Feel free to contact us!

Would our version 5 centrifugal fans also make a difference for the air management in your company? Then we’d like to invite you to sit down with our experts for a no-obligation consultation to discuss the possibilities. At Slingerland, you’re always welcome!

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