CSC Scientific Blog

A blog about test equipment

CSC Scientific Blog

Do You Know If Your Test Sieves Are Doing the Job?

Posted by Art Gatenby on Jul 12, 2018 8:00:00 AM

Do You Re-Certify? Compare with a Master Stack? Check with Calibration Samples?

What Does Recertification Give?

The ASTM E-11 committee has done a great job of establishing three levels of testing. These levels show the probability of a sieve’s mesh to be within the permissible variations. These variations relate to the size of openings in wire-cloth used for test sieves.

Read More

Topics: test sieve equipment, sieve mesh, Quiet sieve shakers, RoTap, ASTM, Mid-Point Sieves, Sieve Certification, Sieve Calibration, Particle Size Analysis, Sieve Testing, Sieving Process, Sieve Shakers, sieving

A Sieve Shaker's Passing From Noise To Quiet

Posted by Art Gatenby on Oct 26, 2016 2:26:45 PM

Quiet Sieve Shakers

Recently in a quiet, reflective moment, I recalled my first work with sieve shakers. Horizontal motion with tapping was the basic shaker design. The Ro-Tap® was King, and there were few alternatives. Different shakers for special applications, such as the Mary Jane and one that was hung from the ceiling, were the exception. 

Read More

Topics: Sieve Shakers, Quiet sieve shakers, Endecotts, RoTap, Noisy Sieving, sieving, Particle Size Analysis, Sonic Sifter, vacuum sievers

What's So Special About Picking A Sieve Shaker?

Posted by Art Gatenby on Jan 6, 2015 9:15:00 PM

If you take Sieve Shakers for granted, you may be surprised to know that the selection of the right shaker can have a profound effect on your sieving results.

Read More

Topics: Sieve Shakers, Particle Size Analysis, Sieve Analysis

How Do You Analyze Small, Micron-Sized Particles?

Posted by Art Gatenby on Jan 30, 2014 2:00:00 PM

Sieve testing, as I have stated many times, is the Cinderella of particle size analysis because it delivers more value than expected from something that’s so easy to use and relatively inexpensive. However, the problem with standard sieving techniques using wire mesh sieves is that they begin to exhibit accuracy problems in the lower micron sizes.

Read More

Topics: Sieve Shakers, "Ask Art", Sonic Sifter, Micron-Sized Particles, Particle Size Analysis, Sieve Testing, Sieving Process

What is The Function of a Sieve Shaker?

Posted by Art Gatenby on Oct 17, 2013 4:56:00 PM

 

Visitors to our web pages often arrive with the question, “What is the Function of a Sieve Shaker?

The simple answer is “to expose the particles in a sample to all the openings in each sieve in a stack”. A sieve stack is the result of fitting each sieve to be used in a given particle size analysis into the one above. The sieve with the largest mesh holes is at the top with each subsequent sieve of a tighter mesh size than the one above it.

Read More

Topics: Sieve Shakers, "Ask Art", Sonic Sifter, Agglomeration, Particle Size Analysis, Sieve Testing, Sieves, Sieving Process, Sieve Analysis

Is Sieve Calibration Really the Holy Grail? Part II

Posted by Art Gatenby on Feb 7, 2012 4:44:00 PM

 Is Sieve Calibration Really the Holy Grail? Part II: Inside a Sieve Test 

As I start on this second installment of The Adventures of Pequeño: The 150 Micron Particle, I wonder why I get myself into these serial onslaughts. However, a promise is a promise, so I shall press on.

You will recall from Part I: Sieve Certification, our little friend Pequeño, a particle on a determined quest to make it through sieves -- particularly those through which he should be too large to pass. In this scenario, Pequeño along with some of his family and friends -- all small particles about 150 microns in size -- are on their way to a sieve test.

Read More

Topics: ASTM, Pequeño, Calibration, Sieve Calibration, Sieve Certification, Sieves, Particle Size Analysis, Sieve Shakers, Sieve Testing

Sieves – Old and New QC Issues

Posted by Art Gatenby on Jul 6, 2011 3:13:00 PM

In April, we published an article in "Powder-Bulk Solids" comparing certification process veracity with a sieve calibration process using calibrated glass microspheres (or beads). The certification process merely indicates that a sieve mesh conforms to a standard that has a wide tolerance regarding mesh openings. It is performed on a small number of openings. On the other hand, calibration using the calibrated beads results in a number representing the mean opening -- a result generated by actually performing a test encompassing at least 80% of the mesh openings.

Read More

Topics: Particle Size Analysis, Sieves, Sieve Calibration, Particle Size Analysis, Sieving Process, Sieve Shakers, Calibration, Sieve Certification, Sieve Testing

Who's Concerned About Sieve Shakers?

Posted by Art Gatenby on Mar 11, 2011 12:33:00 PM


The primary purpose of a sieve shaker is to provide motion to a sample in a test sieve.

An effective sieve shaker creates a motion that presents all the particles to all of the sieve openings and assists particles in passing through. This requires both rotary and vertical motion.

This process seems simple enough, but let's not be taken in.

Read More

Topics: Sieve Shakers, Particle Size Analysis, Sieve Testing, Sieves

Certify Sieves or Calibrate Sieves --- Should You Do It?

Posted by Art Gatenby on Jun 30, 2010 4:57:00 PM

The relative value of a sieve certification process vs a sieve calibration has perplexed me for a long time.

Read More

Topics: Particle Size Analysis, Sieve Shakers, Sieves, Sieve Calibration, Mid-Point Sieves, Sieve Testing

New ASTM E11-09 Sieve Standards — Exciting or Just Dull ???

Posted by Art Gatenby on Oct 6, 2009 5:42:00 PM

I have often ranted about the limited range of ASTM 11 sieve mesh standards as it relates to individual sieve certification. We at CSC have tried to help clearly distinguish between different levels of inspection and/or degrees of conformity. We outlined three levels of sieve certification. These are working sieves, mesh certified sieves and mid point sieves. There are summary definitions of these categories on the CSC Web site.

Read More

Topics: Particle Size Analysis, Sieve Shakers

Subscribe via E-mail

Search the Blog

Most Popular Posts

Posts by Topic