vibratory test sieve with sample loading

Friday May-08 2026  13:43:02

What Is a Vibratory Test Sieve?

vibratory test sieve with sample loading involves loading the sample to be sieved into a vibrating sieve and then performing a sieving test to determine whether the particle size of the material meets the requirements. The sieving analysis conforms to ASTM standards. The test sieve can measure materials from 0.075mm to 100mm in size; sieves with diameters of 200mm or 300mm can be selected. The sample amount for sieving analysis ranges from 5g to 200g, depending on the sample type and maximum particle size.

vibratory test sieve working principle

Before conducting a vibrating sieve test, representative samples need to be prepared. A total sample is collected from different locations on the material pile, conveyor belt, or container using a sampling shovel or sampler. If the material contains moisture, it must be dried first. The material is then gradually and evenly divided using a sample divider until the required test quantity is obtained. After loading the sample into the vibrating sieve, the particles stratify under vibration; smaller particles pass through the sieve openings, while larger particles remain on the sieve surface. The residue from each sieve layer is weighed and recorded for subsequent particle size distribution analysis and repeatability comparison.

What are the sieving methods?

In the process of vibratory test sieve with sample loading, sieving methods are generally divided into two types based on the application of the material: dry sieving and wet sieving.

Dry sieving requires a test sieve machine to sieve the dried sample. Before sieving, a set of sieves is stacked according to their aperture size. The sample is then loaded onto the top sieve, and sieving is performed for 10-15 minutes. After sieving, the particle size of the sample is measured.

Wet sieving involves loading a wet sample onto a sieve and continuously rinsing it with water. Once the water runs clear, the sample is removed from the sieve and dried. After drying, the sample is weighed, and then the particle size is measured.

Why Sample Loading Affects Particle Analysis

In laboratory sieve analysis, sample loading directly affects particle separation results. When too much material is added to the sieve mesh at one time, fine powder may remain on the upper screen layer instead of passing through the opening normally. This situation is more common when testing lightweight powder, dry fine particles, or materials with static electricity. Uneven sample distribution can also cause part of the mesh surface to become overloaded, leading to inconsistent particle grading results between repeated tests.

During vibratory sieve testing, operators usually adjust the sample loading amount according to particle size and material flow condition. For materials such as metal powder, calcium carbonate, or resin particles, smaller batch loading and longer vibration time are often used to improve particle separation. Some laboratory test sieves also use automatic sample loading devices to keep the material feeding speed stable during testing.

Common Sample Sieving Table

Sample Type	Typical Sample Loading	Common Sieve Sizes
Sand	100–500 g	4.75 mm, 2.36 mm, 1.18 mm, 600 μm, 300 μm, 150 μm
Cement	50–100 g	90 μm, 75 μm, 45 μm
Flour	50–100 g	250 μm, 180 μm, 150 μm, 125 μm
Soil	200–500 g	2 mm, 1 mm, 500 μm, 250 μm, 75 μm
Metal Powder	50–200 g	150 μm, 106 μm, 75 μm, 45 μm
Plastic Pellets	100–300 g	4 mm, 2 mm, 1 mm
Coal Powder	50–200 g	500 μm, 250 μm, 125 μm, 75 μm
Pharmaceutical Powder	20–50 g	250 μm, 180 μm, 125 μm, 75 μm
Fertilizer Granules	200–500 g	4 mm, 2 mm, 1 mm

What are the advantages of vibratory test sieve with sample loading?

Vibratory test sieve with sample loading, through quantitative, uniform, and scattered feeding, allows the sample to be evenly spread across the entire effective sieving area of ​​the top sieve. This ensures that the particles are subjected to consistent vibration, resulting in more thorough sieving and more accurate particle size classification. Vibratory sieve testing allows for higher consistency in results from multiple tests conducted under the same parameters, which is beneficial for sample quality control and data comparison. Vibratory sieves can be timed to automatically load samples for sieving, resulting in faster sample separation. During testing, operators only need to set parameters and load samples, avoiding close contact with the vibratory sieve and flying powder, thus preventing mechanical injury and dust inhalation risks. This makes it suitable for testing toxic, harmful, and irritating samples.

Applications of Vibratory Test Siev with Sample Loading

Vibratory test sieves with sample loading can be used in laboratory scenarios such as precise particle size detection, raw material incoming quality screening, finished product outgoing verification, production process optimization support, and sample grading.

It can be used for quantitative particle size distribution analysis of powder and granular samples, obtaining particle size data to meet the data analysis needs of experimental research and development and quality testing. In industries such as chemical, food, and pharmaceutical, sieving can be used to remove unqualified impurities from incoming raw materials, verify particle size compliance of finished products, and optimize process parameters by testing intermediate products. It can also utilize sieves of different mesh sizes to separate and collect samples across multiple particle size ranges, meeting subsequent processing needs.

Frequently Asked Questions

1. How much sample should be loaded into a vibratory test sieve?

Sample should be loaded in a thin, even layer that just covers the sieve surface without overfilling.

2. Why does sample loading affect sieve analysis results?

Sample loading affects results because uneven or excessive material can cause particles to stack and separate inconsistently during vibration.

3. What causes mesh clogging during vibratory sieve testing?

Mesh clogging is caused by fine particles, moisture, or overloading that blocks openings during the sieving process.

Vibratory test sieves with sample loading improve testing efficiency, saving time compared to manual sieving and providing an advantage for rapid material production. When loading samples, the sample quantity should not be too large to avoid affecting the sieving accuracy of the vibratory sieve test.