RO Tap Sieve Shaker
| Applications | separation, fractioning, particle size determination |
| Field of application | agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment / recycling, food, geology / metallurgy, glass / ceramics, medicine / pharmaceuticals |
| Feed material | powders, bulk materials, suspensions |
| Measuring range* | 20 µm – 25 mm |
| Sieving motion | throwing motion with angular momentum |
| Max. batch / feed capacity | 3 kg |
| Max. number of fractions | 9 / 17 |
| Max. mass of sieve stack | 4 kg |
Description
“Discover the Eloquent Technology Ro-Tap Sieve Shaker, the industry-standard solution for precise particle size analysis and size separation,Heavy-duty Rotap Machine for automated sieve analysis. Ideal for mining aggregates, soil testing, and R&D labs.Leading manufacturer of Ro-Tap Sieve Shakers for global industries. Customizable solutions for mining, pharma, and construction labs.
Engineered for durability and accuracy, this sieve shaker automates sieve agitation to deliver consistent results in compliance with ASTM, ISO, and other global standards.
Ideal for quality control in Mining, Material Engineering, Metallurgy, pharmaceuticals, construction, and aggregates, The RO-TAP uses a two-dimensional motion: circular (horizontal) and tapping (vertical).
Its robust design minimizes human error while optimizing workflow efficiency. Features include a heavy-duty timer, quiet operation, and compatibility with 8-inch or 12-inch sieves.
Trusted by labs worldwide for reliable sieve analysis and sample preparation. Upgrade your lab with a machine built for precision and longevity!”
APPLICATION EXAMPLES
cement clinker, chemicals, coffee, construction materials, fertilizers, fillers, flours, grains, metals powders, minerals, nuts, plastics, sand, seeds, soils, washing powder,
Applications of the Functional Principle
- Mining: Separates crushed ore into size fractions for processing optimization.
- Pharmaceuticals: Ensures drug powder uniformity for tablet compression.
- Construction: Determines aggregate gradation for concrete strength testing.
Food Industry: Grades flour or spices to meet quality specifications
PRODUCT ADVANTAGES
- NEW: digital display of performance and time
- suitable for dry and wet sieving
- excellent separation efficiency even with short sieving times
- efficient electromagnetic drive
- 3-D throwing motion which ensures optimum use of the open sieve area and lets the sample move equally over the whole sieving surface
- sieve stack up to 510 mm height
- free adjustment of all process parameters (time, performance)
- optional comfort clamping device
- optional evaluation software EasySieve
- maintenance-free
- easy operation, ergonomic design
FEATURES
| Applications | separation, fractioning, particle size determination |
| Field of application | agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment / recycling, food, geology / metallurgy, glass / ceramics, medicine / pharmaceuticals |
| Feed material | powders, bulk materials, suspensions |
| Measuring range* | 20 µm – 25 mm |
| Sieving motion | throwing motion with angular momentum |
| Max. batch / feed capacity | 3 kg |
| Max. number of fractions | 9 / 17 |
| Max. mass of sieve stack | 4 kg |
| Amplitude | digital, 1 – 100% (0 – 3 mm) |
| Controlled amplitude | – |
| Time display | digital, 1 – 99 min |
| Suitable for dry sieving | yes |
| Suitable for wet sieving | yes |
| USB interface | – |
| Including test certificate / can be calibrated | – |
| Suitable sieve diameters | 100 mm / 150 mm / 200 mm / 203 mm (8″) |
| Max. height of sieve stack | 510 mm |
| Clamping devices | “standard”, “comfort”, each for wet and dry sieving |
| Protection code | IP 54 / IP 20 |
| Electrical supply data | different voltages |
| Power connection | 1-phase |
| W x H x D | 417 x 212 x 384 mm |
| Net weight | ~ 35 kg |
| Standards | CE |
FUNCTION PRINCIPLE
The Ro-Tap Sieve Shaker operates on a dual-motion mechanical principle combining rotation (Ro) and vertical tapping (Tap) to separate particles by size.
Key Components & Workflow
- Motor-Driven Agitation Mechanism
- A heavy-duty motor generates a rotational motion (at ~290 RPM) to horizontally oscillate the sieve stack.
- Simultaneously, an internal cam mechanism delivers vertical taps (at ~150 taps per minute) to dislodge trapped particles.
- Sieve Stack Assembly
- Test samples are placed on a stack of nested sieves arranged in descending mesh size (coarsest at the top, finest at the bottom).
- A pan at the base collects particles smaller than the finest sieve’s mesh.
- Particle Separation Process
- Rotation distributes the sample evenly across the sieve surface.
- Tapping vertically jolts the sieves, preventing particle blockage (blinding) and ensuring efficient passage through mesh openings.
- Timed Operation
- A built-in timer (typically 1–60 minutes) automates the process, standardizing test durations for consistency.
- After the cycle, retained material on each sieve is weighed to calculate particle size distribution.
