The test sieve shaker from NEXOPART deliver exact and reproducible results and meet all the requirements for test equipment monitoring in accordance with DIN EN ISO 9001.
Vibrating sieve shakers from NEXOPART for dry and wet bulk materials in the measuring range from 20 μm - 125 mm
The vibrating sieve shaker from NEXOPART of the EML series and UWL are specially developed for the precise separation and classification of dry and wet bulk materials. They can be flexibly adapted to different types of bulk materials, so that materials can be analysed reliably and in accordance with standards – regardless of shape, size or composition. They ensure a high throughput while maintaining measurement accuracy. They also impress with their robust design and easy handling, which makes the user process much easier.
Vibrating sieve technology for laboratory applications: 3D sieving for your particle analysis
Three-dimensional machine sieving is one of the most well-known and proven methods of analytical sieving. It is also called "throwing sieving" because the test sieve or an entire sieve tower on it is simultaneously set into a vertical and horizontal rotational movement. This will throw all the particles upwards. As soon as the test sieve returns to the starting position, the particles have a chance to pass through a sieve opening when they fall. Particles that do not pass through the sieve are accelerated upwards again with the next movement and are given another opportunity to fall through.
Differences between wet sieving and dry sieving
Wet sieving:
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Wet sieving is a special analytical method using water flushing, which is carried out with a vibrating sieve shaker. In the laboratory, wet sieving is used to determine the fines fraction in aggregates as a so-called "sludge analysis". The rock sample is weighed first. The sample is then placed on the top test sieve of a complete sieve tower and then sieved with the vibratory sieve shaker. When wet sieving starts, water is poured onto the top test sieve via a wide spreading spray diffuser in the sieve cover. The water flows through the sieve tower and is discharged again via a sieve pan with an outlet below the last test sieve. A great help to avoid inclusions and air pockets that can occur due to the surface tension of the water are vent rings. These can be installed in the sieve tower. The rinsing process continues until the escaping liquid is free of solid particles, i.e. the water is clear again. After wet sieving, the test sieves should be dried to a residual moisture content of < 5 %, e.g. in a drying oven. In the next step, the second sieving process takes place. From the difference between the measurement results before wet sieving and the added weighing results, the washed-out fine fraction is determined as a percentage.
Dry sieving:
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Dry sieving is a special analytical method of dry bulk materials, which are separated by a sieve tower with defined mesh sizes on a vibrating sieve shaker. Typical applications in the laboratory are in the testing of building materials, e.g. sand or gravel, powder analyses in chemistry and pharmacy or quality control in the food industry. As with wet sieving, the sample is first weighed. After selecting the appropriate sieves and stacking the sieve tower (coarsest mesh size up, finest down), the sample is placed on the top test sieve in a dry state. The sieve cover for dry sieving is with inspection glass, so that the sample material can be observed during sieving. When the vibrating sieve shaker is started, the typical 3D movements take place, which distribute the material dry and evenly over the sieve surfaces and facilitate the passage of smaller particles through the meshes. After sieving, the contents of each individual sieve are weighed. The percentage grain distribution is calculated from the masses.
The right steps for successful vibratory sieving:
Sample preparation: the sample should be dry and free of agglomerate.
Sieve selection: Sieves with graduated mesh sizes are stacked on top of each other in a sieve tower, whereby the following applies: mesh sizes from coarsely top to fine bottom, sieve pan to the very bottom.
Weigh the sample: The total mass of the sample is determined before the start.
Filling and sieving: Place the sample on the top test sieve, clamp the sieving tower firmly on the vibrating sieve shaker, adjust the sieving time, interval and amplitude.
Sieving: Vibrating sieve shaker separates the sample according to grain size, particles remained on the test sieve, the mesh size of which is smaller than their grain size.
Evaluation: The material on each test sieve is weighed. From this, the percentage grain distribution is calculated. Results are documented.
NEXOPART vibrating sieve shakers certified according to DIN EN ISO 9000
The vibrating sieve shakers from NEXOPART are testing and measuring equipment that are certified and tested according to DIN EN ISO 9001 ff. Regular inspections of the shakers ensure their function, safety and perfect condition. This ensures long-term and standard-compliant quality assurance. After successful testing, the vibrating sieve shakers from NEXOPART receive a seal of approval as well as an acceptance test certificate 3.1 in accordance with DIN EN 10204.
Models and Features of NEXOPART Vibrating sieve shakers
EML 200 Pure:
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• Basic model
• Easy to use (plug and play)
• Two hard-coded amplitudes (fine 0,9 and coarse 2,2)
• Predefined interval (every 10 sec.)
• Sample weight of up to 3 kg
• Voltage: 110 - 230 V, 50 - 60 Hz
• Dimension W x D x H: 385 x 295 x 895 mm
• Weight: 37 kg, net
• Sieve diameter up to 203 mm
• Cover with inspection glass
• Only for dry sieving
Application: The EML 200 Pure is particularly suitable for laboratories or for applications where simple dry sieving with the classic clamping system is sufficient. It comes in proven quality at an affordable price.
Buy the EML 200 Pure from Nexopart now.
EML 200 Premium:
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• User-friendly data interface
• Individually adjustable amplitudes (freely selectable up to 3 mm)
• Individually definable intervals
• Sample weight of up to 3 kg
• Voltage: 110 - 230 V, 50 - 60 Hz
• Dimension W x D x H: 385 x 295 x 895 mm
• Weight: 37 kg, net
• User-friendly display
• Available with two different clamping systems: TwinNut and Classic
• Sieve diameter up to 203 mm
• Cover with inspection glass
• Only for dry sieving
Application: The EML 200 Premium is very suitable for laboratories or for applications where simple dry sieving is required with more options for freely adjusting the amplitude and interval. It comes in robust quality at a good price.
Check out the EML 200 Premium from Nexopart here.
EML 200 Premium Remote:
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• User-friendly data interface
• Individually adjustable amplitudes (freely selectable up to 3 mm)
• Individually definable intervals
• Sample weight of up to 3 kg
• Voltage: 110 - 230 V, 50 - 60 Hz
• Dimension W x D x H: 385 x 295 x 895 mm
• Weight: 37 kg, net
• Separate control unit with user-friendly display
• Available with two different clamping systems: TwinNut and Classic
• Sieve diameter up to 203 mm
• Cover with integrated full cone nozzle
• Suitable for wet and dry sieving
Application: The EML 200 Premium Remote is specially developed for wet sieving. It is equipped with a separate control unit and also offers the option of safe dry sieving. This makes it ideal for laboratories that want the option of wet and/ or dry sieving. It comes in the best quality at a good price.
Shop the EML 200 Premium Remote from Nexopart now.
EML 315:
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• Individually adjustable amplitudes (freely selectable up to 2 mm)
• Individually definable intervals
• Sample weight of up to 6 kg
• Voltage: 110 - 230 V, 50 - 60 Hz
• Dimension W x D x H: 404 x 440 x 1000 mm
• Weight: 55 kg, net
• Separate control unit with user-friendly display
• Available with two different clamping systems: TwinNut and Classic
• Sieve diameter up to 315 mm
• Cover with wide spreading spray diffuser
• Two types of machines available: for wet sieving (digital plus N) + for dry sieving (digital plus T)
Application: The EML 315 is particularly suitable for laboratories or for applications where heavy bulk materials up to 6 kg with test sieves with a diameter of 200 - 315 mm are used.
EML 415:
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• Individually adjustable amplitudes
• Individually definable intervals
• Sample weight of up to 15 kg
• Voltage: 110 - 230 V, 50 - 60 Hz
• Dimension W x D x H: 585 x 575 x 1300 mm
• Weight: 135 kg, net
• Separate control unit with user-friendly display
• Available with two different clamping systems: TwinNut and Classic
• Sieve diameter up to 450 mm
• Cover with wide spreading spray diffuser
• Two types of machines available: for wet sieving (digital plus N) + for dry sieving (digital plus T)
Application: The EML 450 is equipped for laboratories or for applications where heavy bulk materials up to 15 kg are used with test sieves with a diameter of 200 - 450 mm.
UWL 400:
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• 2 three-phase unbalance motors
• Easy to use (plug and play)
• 1500 oscillations per minute
• Sample weight of up to 20 kg
• Voltage: 200 - 240 V, 50 - 60 Hz
• Dimension W x D x H: 600 x 600 x 1420 mm
• Weight: 190 kg, net
• Separate control unit
• Available with three different clamping systems: TwinNut, Classic and clamping system for beechwood frames
• Sieve diameter up to 450 mm
• Cover with wide spreading spray diffuser
• Suitable for wet and dry sieving
• Three types of machines available: for wet sieving (N) + for dry sieving (T) + for beechwood frames (H)
Application: The UWL 400 is specially developed for large and heavy bulk materials up to 20 kg. It is NEXOPART's most powerful 3D test shaker and offers the option of dry and wet sieving as well as sieving with beechwood frames.
Advantages over other sieving machines:
Higher sieving performance and accuracy: The vibration movement optimally distributes the material, which enables uniform separation and accurate results.
Time savings: Shorter sieve times with consistent precision – ideal for laboratories with high sample throughput.
Flexibility: Can be used for different materials and grain sizes, both dry and wet.
Gentle treatment of the material: Minimizes agglomerations and prevents material loss.
Easy operation and cleaning: Modern design and robust construction ideally suited for daily use.
High cost-effectiveness and efficiency: Maximum benefit at comparatively low costs. Resources are used optimally, unnecessary expenses are avoided and competitiveness is increased.
Application for laboratory analyses
Building materials industry: Analysis of sand, gravel, cement, mineral raw materials and aggregates.
Chemical industry: Quality control of powders and granules.
Pharmaceutical industry: particle size analysis of active ingredients and excipients.
Food industry: Examination of flours, sugar and other bulk materials.
Environmental and recycling laboratories: sieving of soil samples and secondary materials.
FAQ about vibrating sieve shakers
What are vibrating sieve shakers?
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Vibrating sieve shakers are mechanical analyzers for separating and classifying bulk materials by grain size, typically in the measuring range of 20 μm to 125 mm. Inside, a motor together with a magnet creates a three-dimensional movement. This combination of vibration, rotation and up and down movement creates the 3D sieving effect. The sample material is placed on the uppermost, coarsest test sieve in the sieve tower. The three-dimensional sieving action moves the material through the sieve tower. Depending on the mesh size, the particles are divided into different fractions – from coarse on the top test sieve to fine on the lower test sieve.
Which sieve parameters are important?
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The most important sieve parameters are the sieve time, interval and amplitude. The number of possible comparisons between particles and sieve opening is the factor that determines the efficiency of test sieving. Each particle therefore have the opportunity to pass through a free sieve opening several times and in different orientations during the sieving process. In the case of sieving with a vibrating sieve shaker, this number of comparison possibilities is not accidental. It can be controlled in a targeted manner by adjusting various sieve parameters. Although the optimal setting of these parameters depends on the specific properties of the material and the goal of the sieving, there are proven recommendations for sieve time, interval and amplitude.
What is a sieve time?
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The sieve time is the duration of the sieving process set on the vibrating sieve shaker. The quality of the sieving results is largely determined by the duration of the sieving: If the sieve time is too short, fine particles will remain in larger fractions because they have not had enough time to pass through the sieve opening. In the case of brittle and non-abrasion-resistant sieving materials, too long of sieve time leads to destruction and reduction of the particles. According to DIN 66165, sieving is considered complete for most abrasion-resistant materials if less than 0.1 % of the feed mass passes through the sieve within one minute. In addition, there are national and international standards as well as internal regulations that contain material-specific specifications.
What is the interval?
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With the interval function, the vibrating sieve shaker can be paused for a freely defined period of time (1 to 59 seconds) during the sieving process. This gives fine particles that swirl around in the upper sieve area due to collisions with other particles, have the opportunity to fall through an open sieve opening. Particles stuck in a sieve opening cannot be removed during operation. The advantage of the interval function is that stuck particles are released by the re-starting pulse and the oscillating movement. With the help of the interval function, the measurement accuracy and efficiency of the sieve analysis is increased.
What is the amplitude?
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The amplitude refers to the distance between the upper and lower "dead center" of an oscillating motion. The amplitude controls how much the individual particles on the sieve mesh are accelerated. If the amplitude is set too low, the particles remain on the sieve openings and block them. If the amplitude is too high, the particles are accelerated too much. As a result, they remain in the air for too long, sometimes collide with other particles and fall back onto the sieve mesh with a delay. In both cases, the chances of particles passing through free sieve openings are minimized. With an optimally adjusted amplitude, the particles do not linger too long in the air or on the sieve bottom and have the best conditions to pass through the sieve openings.
