REPRESENTATIVE SAMPLE DIVISION
Choose how to divide a bulk sample before choosing the machine. Compare equal portions, sample extraction with reject, and larger-batch preparation for laboratory analysis.
START WITH THE PURPOSE
A bulk material can contain particles of different sizes, densities and compositions. A small scoop from one location may not reflect that variation. Controlled sample division takes repeated portions from the material stream to help prepare a more representative laboratory sample.
A divider reduces sample quantity; a sieve separates by particle size, and a mill reduces particle size. They solve different preparation tasks and can be used in sequence.
Division cannot correct a biased original sample. The incoming sample, material flow, equipment configuration and handling method all matter.
THREE WAYS TO START
“Mode” describes what happens to the sample. The model and fitted dividing module determine which modes are available.
Divide the whole sample into comparable fractions for different tests, laboratories or retained references. Choose the dividing head and receiving vessels around the number and size of portions.
Compare PT 100 for laboratory batches and PT 300 for larger quantities.
Find an equal-portion setup ↗Take a controlled fraction for analysis and collect the rest separately. The “reject” is simply the remainder of this dividing step; it can be retained if the method requires it.
Compare PT 200 adjustable extraction and PT 300 with an extraction module.
Find an extraction setup ↗Start with more material, then choose batch fractions or one sample with reject. If a single division still leaves too much sample, plan a documented second division using compatible equipment.
Explore PT 300 and its 30 L / 60 L configurations. Confirm the complete reduction sequence.
Review a bulk-sample task ↗A PRACTICAL SELECTION HELPER
Start with what you know. Leave quantities blank if you are unsure. The result suggests a preparation route and models to compare, rather than a final equipment specification.
THE MODELS AT A GLANCE
Equal-portion division
A rotating dividing head distributes the feed among 6, 8 or 10 receiving positions. A practical starting point for laboratory subsamples, repeat analyses and retained reference portions.
Sample extraction with reject
A rotating tube feeds a cone with adjustable sample slots. Retain one to three sample streams while the remaining material passes to a separate reject collector.
Large-batch division or extraction
Choose a dividing module for multiple batch fractions or for one retained sample with reject. Larger feed and 30 L or 60 L configurations support bulk-sample preparation.
| Consideration | PT 100 | PT 200 | PT 300 |
|---|---|---|---|
| Primary dividing task | Several comparable laboratory fractions | Extract sample streams with adjustable slots; collect remainder separately | Multiple batch fractions or one sample with reject |
| Starting quantity / configuration | Up to 5 L batch feed | Review feed duration, sample bottles and 26 L reject collector; not a 5 L batch-capacity rating | 30 L or 60 L configuration |
| Largest feed particle* | Up to 10 mm | Up to 10 mm | Up to 30 mm |
| Division arrangement | 6 / 8 / 10 fractions | 1 / 2 / 3 sample outlets, by bottom cone | Batch: 4 / 6 / 8 / 10; extraction: one sample plus reject |
| What to specify | Dividing head, receiving bottles and feeder | Bottom cone, slot ratio, sample vessels, reject collection and feeder | 30/60 L setup, dividing module, collection and feeding |
*Published limits depend on material and configuration. Receiving volume is different from starting batch volume. Match fraction volume and material mass to the actual vessels; do not assume every maximum applies together.
BUILD A USEFUL PREPARATION METHOD
List the tests, number of portions and amount required for each. Include retained samples and allowance for repeat analysis.
Moisture, static, agglomeration and particle shape can change feeding. Sticky material or slurry needs a preparation review before a dry-bulk divider is selected.
Review hopper, chute and feeder with the sample. The DR 100 vibratory feeder is an option for compatible setups; confirm the complete arrangement.
Document the initial sample, feed conditions, dividing configuration, fraction masses and cleanout. Check that important components remain represented in the retained sample.
COMMON QUESTIONS
It is the intended division arrangement, not a guarantee of identical masses or composition for every material. Assess the method using your sample, feed conditions and analytical requirements.
A staged reduction may be appropriate. Choose the retained fraction at each step and keep handling losses, segregation and minimum useful sample size in view. Do not assume a single pass will produce every required final quantity.
It depends on the initial particle size, required analysis and acceptable preparation changes. Review the sequence together: coarse division, size reduction and further division may each have a role.
Share both when possible. Bulk density connects mass and volume, and vessel fit depends on volume as well as load. The helper uses liters for initial screening; Glen Mills can review a mass-based task with you.
FROM A SAMPLE TO A WORKING METHOD
Share starting volume or mass, largest particle, flow behavior, number of portions and the final amount each test needs.