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High-pressure fans for industrial applications

For over 75 years, Naaykens’ has supplied high-pressure fans designed to maintain constant pressure at low energy consumption. These fans are ideal for high pressure and low flow applications.

Over the years, we have supplied high-pressure fans for many different industries. Consider:

  • Creation of high negative pressure for product suction;
  • Blowing off and extracting dust from products, including via air knives.

High-pressure fans have a large starting torque and impeller diameter, putting a heavy load on the motors and impellers. Therefore, always choose good quality so that 24/7 production is actually guaranteed 24/7.

Our sales engineers are ready to work with you to find the optimal fan for your process air!

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High pressure fan

An example of a large high-pressure fan. Note especially the relatively large fan and sturdy construction needed to deliver the combination of high pressure and flow rate.

High-quality high-pressure fans

Naaykens’ industrial high-pressure fans combine the latest technology with high quality. When reliability, optimum efficiency and low energy consumption are required, Naaykens’ high-pressure fans are your best choice.

Our high pressure fans are compact and robust. They are equipped with a lightweight aluminium impeller to achieve a short lead time. Of course the impeller can also be made from weathering steel, stainless steel, or any other steel you like.

The blades are placed in the specially designed impeller with great precision. The impeller is optimised for a stable air flow across the entire feature. These high-pressure fans can be supplied in working pressures from 30 mbar to around 160 mbar.

Applications of high-pressure fans

Industrial high pressure fans are mainly used for:

  • Pressure boosting
  • Air knives
  • Pneumatic transport
  • Burner supply air
  • Flotation cell
  • Lifting
  • Waste water treatment
  • Fluidisation processes
  • Purge air for sight glasses
  • Cooling and drying

And many other applications!

High pressure stainless fan
High pressure stainless fan

Solid construction for high-pressure fans

Use of materials: correct sheet thicknesses per component

With high-pressure fans and large fans with high flow rates, high forces come to bear on the fan and impeller. It is therefore important to use the right thicknesses of sheet material. Our engineers have extensive experience in calculating the right material thicknesses for each component. Too thin and the fan will cause many vibrations or even fail. Too thick and the fan is unnecessarily heavy, and with current material prices also unnecessarily expensive. Incidentally, Naaykens prides itself on being suitable for the heavier applications.

Depending on the size, pressure, temperature and rotation speed of the fan, the right thicknesses are determined. Where necessary, we reinforce the fans and impellers to make them robust and low-vibration.

The photos below show examples of this. The left photo is of a large fan for very high pressure. The combination of large surface area and high negative pressure creates high forces on the side plates of the fan. To withstand this, thicker plates were used, reinforcement strips were welded over the plates and UNP profiles were placed all around. Also note the thick flanges on the inlet cone and outlet.

Also shown is an impeller that will move a lot of air at high speeds. This impeller will have to withstand high forces, and thicker plate material has been chosen for the back plate, inlet cone and impeller blades. Here, two reinforcement rings have been added between the impeller blades, and all joints are fully welded. In contrast, in addition, a smaller impeller for easier application, with thinner sheet material and without reinforcement rings.

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Higher temperatures due to pressure increase

When designing a system with high-pressure fans, it is sometimes forgotten that gases get hotter when compressed. The Ideal Gas Law (PV = nRT) shows that there is a relationship between gas pressure and temperature. The exact determination of the increase in temperature is complex considering the volume is not constant. A simple rule of thumb is that for every 1,000 Pa of pressure, the temperature increases by 1.15°C – so at 25,000 Pa or 250 mbar, that’s about 29 degrees.

In addition, it is inevitable that additional heat will be added due to inefficiencies that occur in any production process. This obviously needs to be taken into account, and if the temperatures of the process gases are critical, various measures can be taken for this.

Examples of high-pressure fans supplied by Naaykens'

High negative pressure for suction of loaves via a depanner

We supply high-pressure fans for depanning machines for a number of bakeries. After baking in an oven, for example, loaves and cakes are removed from the baking moulds by suction cups, allowing them to be further packed undamaged.

Stable consistent negative pressure

Due to the solid design of our fans, consistent negative pressure is achieved, which is an important prerequisite for consistency in the production line. Also by using high-quality bearings and motors, we can guarantee continuous production, a stagnant production line is obviously a very undesirable situation.

Reference Order 84992
Flow rate m3/h 2.000
Static pressure at 140° C (Pa) 8000
Speed (o/min) 3150, frequency controlled
Motor power, absorbed ( kW) 6.4
Motor power, maximum (kW) 11
Materials Fan: S235
Impeller: Aluminum
Specifications Including silencer
Frame included
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Pneumatic transport via high-pressure fans

Our high-pressure ventilators are also used for material transport of certain bulk goods. A great example is the so-called venti-floor for abrasive recovery. Here abrasive is sucked up at high speed, the usable abrasive is separated from the dust and air in a cyclone and thus recycled.

We therefore often supply high-pressure fans for our sister company Straaltechniek International, where we integrate them nicely into the blasting machines. The unique aspect of this cooperation is that we thus control the entire construction of the blasting booths, with expertise of the most important components. Straaltechniek supplies the best boilers and knowledge of the blasting process, and Naaykens’ takes care of the extraction and clear air in the cabin.

The robust construction of our high-pressure fans also applies well here, there are few environments where there is more wear and tear than blasting.

Venti floor

Extraction points for blasting media in the floor of a blast cabinet, a so-called venti-floor system

Multi-stage fans

For extra high pressures, it is also possible to increase the pressure in two (or more) stages. This can be done with a so-called multi-stage fan, where the air from the first fan is the supply of the second fan. The high pressure of the supplied air is further increased by the second fan.

In multi-stage fans, the impellers of the fan are usually driven by a single electric motor via a central shaft between two bearing blocks. This is because stability is very important here, which is achieved by the single shaft sandwiched by the bearings. Incidentally, we also supply and manufacture multi-stage or multi-stage fans with 1 shaft and 1 motor per stage. The interesting thing about this application is that the combination of pressure and flow rate cannot be achieved by a single fan, nor by a compressor.

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So, now you hopefully have a good idea of the wide range of high-pressure fans that Naaykens’ has proudly supplied!