What is a RoTap?

What is a RoTap?

A RO-TAP is a particle analysis machine that is used in all kinds of industries to test and separate particles. An oscillating motion is used to shake particles down through a series of different test sieves in a stack.

How do you find the particle size?

Common methods of particle size measurement

1. Sieves. While this is an old technique, it has the advantage of being cheap and particularly useful for the measurement of large particles.
2. Sedimentation. This has been a common method used (historically) in clay and ceramics industries.
3. Electrozone testing.
4. Laser Diffraction.

What is RoTap sieve shaker?

Ro-Tap Sieve Shakers is a sieving machine that is widely accepted in standardized particle sizing test methods. These shakers have a horizontal, circular motion with a vertical tapping action to assure accurate and consistent particle analysis testing results.

How do you measure the particle size of a powder?

The first method of measuring powder size is to use microscopy techniques, such as optical microscopes, scanning electron microscopes and/or transmission electron microscopes. These techniques allow one to directly see and measure the various dimensions of the powder particles.

What are sieve shakers used for?

Test sieve shakers are used to analyze the samples collected in test sieves. The testing involves the shaking or manipulation of the sample, resulting in data analysis. The uses of a mechanical sieve shaker include determining the range of particle sizes within a sample.

What does D90 particle size mean?

D90 or DV(0.9) means that 90% of the total particles are smaller than this size. D50 DV(0.5) means that 50% of the total particles are smaller than this size. Or we can say, 50% of the particles are larger than this size. Obviously, D50 is the median particle size distribution, we can call this value, Median.

How do sieve shakers work?

Sieve shakers are devices designed to help promote particle movement through a stack of sieves, facilitating accurate particle separation. As the particle separate, they are retained on the various sieves depending on their size, providing insight into the average particle size of your sample.

What is the standard particle size of a powder?

Based on 1993 British Standards [ 4], any discrete particles whose sizes are less than 1,000µm are called powders.

What is a ro-tap?

A RO-TAP is a particle size analysis instrument that is designed for use in a wide range of industries to test and separate particles. What Is a Test Sieve? Test sieves are best defined as a screening medium, with uniform opening size and shape, mounted on a rigid frame.

What is the average weight of an RO-tap?

As the average weight range of an RO-TAP is from 90 to 180 LBS depending on which model you select, we highly recommend that you have a co-worker assist you. If you are using an RX-29, RX-30, or an RX-94 model, you will need to check the hammer height to ensure it complies with the number of sieves in your stack.

How many oscillations does the Ro-tap generate?

The Ro-Tap generates 278 oscillations and 150 taps per minute as specified in some ASTM and other sieving applications. These shakers have a horizontal, circular motion with a vertical tapping action to assure accurate and consistent particle analysis testing results.

How many sieves can be used in a ro-tap?

While the RO-TAP was designed to test 1 to 13 sieves at a time, using a 13-sieve stack is fairly uncommon and would need to be half-height sieves. Using 6, full-height sieves in a stack is the most common and preferred test sieve analysis method.