DNT SUGAR SCREENS

---

 Whether used for technical or decorative applications, round hole perforations are the most frequently used in perforated products. Geometrically, a round hole is the most solid shape. 

Round hole perforations provide the possibility of a large open area and strength and comes in triangular, diagonal, straight or staggered rows and also with decorative holes.

Our perforated sheets with round hole perforations are used in many applications for example: 

Sieves  

• for agriculture (sieves for sorting/grading of seeds and stones)
• for the building industry
• for the recycling industry (sorting of bulk materials)

• Protection and ventilation sheets

Round holes are often used for acoustics and safety for the IT industry, as well as machinery construction for protection and ventilation panels.

Round holes offer a large ventilation opening with effective protection for the machine parts inside.

Facades

Round hole perforations offer an aesthetic decorative privacy shield and increases protection against the sun, and are also used for infill panels in balconies and balustrade panels.

Our vast experience as Europe’s largest producer and supplier of perforated products ensure we are your reliable and competent partner to process several types of raw materials.

Take inspiration offered by the vast number of possibilities and feel free to contact us for further information.

 As with round holes, whether functional or decorative, perforated sheets with square holes can be used in many different ways. 

Square holes can be supplied with parallel rows, diagonal rows or staggered rows. In addition, square hole perforations allow a high open area for applications such as ventilation and guards.

Some examples of applications for perforated sheets with square hole perforation.

Safety and ventilation sheets  

• Ventilation and safety guards for the machine building industry
• Ventilation and security covers for computer server chassis

Facades

• Screens for defusing and sun protection
• Balconies and balustrades

Our vast experience as Europe’s largest producer and supplier of perforated products ensures we can produce these patterns in many different materials. 

Take inspiration offered by the number of perforation possibilities and be guided by our experts.

Slot hole perforations can have either round ends or square ends (rectangular holes) and are typically used for sieves. 

Depending on the application requirements there are a range of slotted holes and patterns e.g staggered or straight rows, herring bone and chessboard from which to select.

Get inspiration from the numerous possibilities of perforation and please ask for any advice. 

A few applications for slot hole perforated sheets

• Sieves for grain drying and sorting
• Malting floors (drying-kiln and germ-hutches)

Sieves for seed processing machinery are used in both the pre-cleaning and main cleaning of grain, maize, oil seeds, legumes, malt, rice, coffee and soy beans. The cleaning and sorting of seeds (malformed, discoloured, germinated, broken, contaminated with other species or mouldy grains in seed lots) can severely impact seed quality, viability and vigour and therefore the market value.

When used for this application DNT sieves achieve high quality cleaning and accurate sorting of seeds.

Sieves for sorting machines

Sieves for revolving screen machines

• Test sieves for grain according to DIN/ISO 3310
• Laboratory sieves with a high degree of accuracy

Food processing industries

• Fodder and grain mills

Recycling industries

• Separation
• Pellets and granulates production

DNT's screens for malting floors are manufactured to high quality standards giving reliability and effectiveness. For all processes, from drying-kiln to germ-hutches, perforated sheets incorporating slot hole perforation are predominantly used. 

Brewery and Winery/Others

• Malting floors made of steel and stainless steel for malt processing technology
• Sieves for press houses and presses
• Sieves for paring and polishing rice
• Rope belt conveyers
• Decorative applications 

Achieve high open areas with hexagonal perforation from DNT. 

Maximum ventilation

The need for effective cooling is increasing for many technical products. Flexible solutions and innovative products like our hexagonal perforation patterns are the answer.

Our hexagonal perforation provides an extremely high open area of up to 85%. Sheets with holes of this configuration are very lightweight. The stability of the parent material is of the utmost importance to maintain the shape of a honeycomb structure. This pattern produces an appealing, timeless design suitable for current and future product applications.

The ability to control airflow can be used not only for cooling, but also the opposite effect using a targeted heat supply. 

IT

Whether it is racks or server cabinets the heat developed from the integrated systems and components must be removed to the outside efficiently, which is usually achieved by using internal fan modules. A sheet with a hexagonal perforation provides a very large open area giving optimal ventilation. Thanks to the high air flow, temperatures can be kept constant in the cabinet, whereas the other areas of the cabinet can remain obscured by non-perforated areas and are therefore protected.

Automotive

The need to cool heat producing parts of machines and engines e.g. tractors and other vehicles is a traditional application for perforated sheet metal products. Depending on the chosen open area, the heat can either be dissipated or be re-circulated. Small hexagon perforated sheets can also be used as protection against insects in the engine compartment.

Bridge slot perforation is a special perforation manufactured with exacting precision. The combination of heavy sheet thickness and very fine openings provides great resistance for filtering and ventilation.

Applications for bridge slot sheets

Bridge slot perforation is often used for water drainage shafts and drying. Bridge slot perforation is typically used for:

• Drying and storing solid matters and materials of all kinds
  • including herbs, tea, grain and grass seed, maize, rape and wood chips
• Filters for fountains and drainage

The open area of bridge slot perforation is variable and depends on the depth of embossing. An embossed depth of 1.5 mm (suitable for rape seed) provides an open area of 3.7 % for ventilation. Another example are sheets with an embossed depth of 3.0 mm giving an open area of 9.1%.

Ideally seed and grain need to be stored in an area with a moisture content of less than 14.5%.
If the storage area is too moist, fungus infestation and self-heating can follow. DNT Bridge slot sheets offer you a drying solution with appropriate optimised ventilation.
With their open area DNT Bridge slot sheets allow permanent free flowing ventilation. 

Our service for you

• Guidance for the optimal storage and drying solution
• Additional ventilation sheets or replacement of existing damaged ventilation sheets
• Production of different material thicknesses
• Additional fixing holes and bending as required
• Short delivery times

If you want to secure first choice solutions for ventilation you will always find the right partner for service, ideas and quality in DNT. We are your experienced partner for industry and agriculture.

DNT Trieur sheets are used for cleaning and sorting particularly grain and seeds. 

 The size of the “pockets” depend on your requirements, however the shape of the “pockets” is the most important consideration for the performance of the machine. DNT Trieur sheets are cut to size according to your specific requirements and then rolled or welded into a cylinder. 

These products offer you the highest quality for sorting and separating seeds to minimize your waste. DNT Trieur sheets are made of steel or stainless steel. 

DNT Perfocon offers specially shaped holes that allow easy exit of particles or air through the screen. A specialist product in order to obtain a perfect result in the milling process. 

Small holes in thick material

DNT Perfocon is an exclusive product from DNT which offers specially shaped holes that allow easy exit of particles through the screen – even with a combination of small holes in thick material. DNT Perfocon is extremely durable and long lasting compared to alternative products, giving you a more cost effective solution due to fewer production stoppages.

DNT Perfocon is a specially designed product, produced with a special technique that enables us to manufacture sheets with a thickness many times greater than the hole diameter, e.g. 0.2 mm holes in 1.0 mm stainless steel. To make sheets with holes that small in a material so hard and thick is exceptional and opens the door to an entirely different use of perforated sheets.

The properties of directional perforation enable control in airflow and sieving. The design and the angle are developed specifically to reduce the possible blocking of the holes, thereby DNT Perfocon minimizes the clogging effect. These qualities make DNT Perfocon particularly suited for the separation processes.

An example of this is when selecting a stainless steel DNT Perfocon sheet that has subsequently been electro polished, it will distinctly minimize the risk of enzymes and other particles "sticking" in the holes and reducing the flow. The electro polishing process effectively de-burrs the hole and smoothes the surface eliminating the possibility of particle blockages. We offer DNT Perfocon in mild, galvanized and stainless steel.

Applications

• Cheese moulds
• Distributer plates in fluid bed dryers
• Hammer mills
• Centrifugal

DNT Perfocon hole sizes

• from 0.15 mm to 1.0 mm/stainless steel
• from 0.15 mm to 3.0 mm/mild steel 

Our goal is to fulfill the requirements of our customers by providing an extensive choice of high quality perforated products. With DNT Premium Perforation, we have therefore taken perforation solutions to the next level. The DNT Premium Perforation range offers perforation with hole diameters that are the same size as the sheet thickness, as well as holes that are smaller than the sheet thickness. 

DNT Premium Perforation product range

With DNT Premium Perforation, we offer products with holes the same size as sheet thickness, as well as hole sizes smaller than sheet thickness, such as:

1: Perforation with holes the same size as the material thickness  (1:1 perforation) 

• 0.50 mm holes in 0.50 mm stainless steel
• 1.00 mm holes in 1.00 mm stainless steel

2: Perforation with hole size smaller than the material thickness

• 0.20 mm holes in 1.00 mm stainless steel (DNT Perfocon)
• 1.00 mm holes in 1.50 mm mild steel
• 8.00 mm holes in 10.0 mm stainless steel

DNT is the world’s largest supplier of perforated sheets and one of the only companies to offer such an extensive range of these types of perforations from stock, as well as tailor-made solutions with other patterns and thicknesses.

DNT Premium - taking perforation to the next level...

DNT Premium Perforation gives you several advantages when compared to traditional and main-stream perforation in areas such as:

• Durability (wearing)
• Lifetime of screen (less replacement, fewer production stops for maintenance)
• Cost effectiveness
• Strength

Thanks to its lightness, strength and anti-skid qualities, DNT Expanded Metal is a very popular material for today's building and industrial design.

Our many customers all over the world use DNT Expanded Metal for many different types of applications e.g for walkways, footbridges, footsteps, safety fences, reinforcing of concrete as well as for shielding in buildings and constructions.

There are many advantages in using DNT Expanded Metal. Below we have listed just a few.

• Cost efficiency
• Greater strength
• Anti-skid qualities
• Lightness
• Ideal for secondary operations

Please follow this link for more information on the advantages of using DNT Expanded Metal. 

We offer some DNT Expanded Metal as stock sheets with immediate delivery and in addition we can produce tailor made products exactly designed for the actual purpose