Grain Sieves

What is a grain sieve?

A grain sieve is a sieve commonly used in agriculture to analyze and grade grain according to particle size to ensure that the grain meets specific size and quality specifications, by analyzing the particle size distribution of grain, farmers and manufacturers can ensure their Products perform as expected in a variety of applications including baking, brewing and animal feed. Grain sieves are usually made of metal, such as brass or stainless steel, and consist of a circular frame and a mesh screen with a specific hole size and distribution. Grain sieves are available in a variety of sizes and mesh sizes, with common sizes ranging from #4 to #200. The exact size of the sieve used will depend on the particles being analyzed and the desired size range.

When using a grain sieve, place a grain sample on top of the sieve, then shake or stir the sieve to separate the grains by particle size. Smaller particles pass through the holes in the screen and collect on a tray or container below the screen, while larger particles remain on top of the screen.

Types of Grain Sieves

Grain sieves is a kind of testing instrument for checking the impurity content in grains, oil samples and the content of bran powder in rice to determine its quality grade. According to its different applications, it is divided into the following two types:

1. Pest selection sieve: The standard grain sieve is a special instrument for testing the degree of pest infestation in grains and oil samples, and determining the density of pests and the level of pests.

2. Grain selection sieve: an inspection instrument for inspecting the quality of grains such as wheat and corn to determine their quality grades.

What is the use of a Grain Sieves?

Grain sieves are widely used in various applications in the agricultural industry. Here are some common applications for grain sieves:

Quality Control: Used to ensure that grain meets specific size and quality specifications. By analyzing the particle size distribution of grains, farmers and manufacturers can ensure their products will perform as expected in a variety of applications including baking, brewing and animal feed.

Sorting and Grading: For sorting and grading grain according to particle size. This process helps ensure that similar sized grains are grouped together, making it easier to process and distribute the grains.

Research and Development: Used in research and development to study the physical properties of grains and their behavior under different conditions. This information can be used to develop new cereal products or improve existing cereal products.

Seed Testing: Used for seed testing to determine the purity and germination rate of grain seeds. This information is used to ensure that the seeds are high quality and produce healthy plants.

Sieving Method of Grain Sieves

The sieving method of grain sieve is a process used to determine the particle size distribution of grain, sand, soil and other granular materials. The method involves passing a sample of material through a series of sieves with progressively smaller meshes and measuring the amount of material retained on each sieve.

1. First collect and weigh a representative sample of the material.

2. Place the sample on the top sieve of the stack and shake the stack for the specified time using a mechanical or manual shaker.

3. Collect and weigh the material that passes through the top sieve and repeat the process for each subsequent sieve in the stack.

4. After all sieves have been processed, determine the amount of material retained on each sieve by subtracting the weight of material that passed through the sieves from the original weight of the sample.

5. Use these retained weights to calculate the particle size distribution of the material.

How do grain sieves work?

Grain sieves use a vibration device to vibrate the grain or granular materials in the screen box, so that the particles are separated on the screen. Smaller particles pass through the sieve apertures and fall into the container below, while larger particles are unable to pass through the sieve apertures and remain on the sieve. In this way, particles are classified according to size, impurities are removed, and particle sieving and separation are achieved. The frequency and amplitude of vibration can be adjusted to suit different particle sizes and sieving requirements.

Grain Sieves Specifications

No.	Technical	Technical indicate
1	Sieve Diameter	200mm 8inch/300mm 12inch/100mm4inch/75mm 3inch
2	Material	Stainless steel or Brass
3	Inner height	50mm and 60mm
4	Aperture size range	0.02mm to 125mm
5	Hole model	Wire mesh and perforated plate
6	Detail aperture	125, 106, 100, 90, 75, 63, 53, 50, 45, 37.5, 31.5, 25, 22.4, 19, 16, 13.2, 12.5, 11.2, 9.5, 8, 6.7, 6.3, 5.6, 4.75, 4, 3.35, 2.8, 2.36, 2, 1.7, 1.4, 1.18, 1, 0.85, 0.71, 0.6, 0.5, 0.425, 0.355, 0.3, 0.25, 0.212, 0.18, 0.15, 0.125, 0.106, 0.09, 0.075, 0.063, 0.053, 0.045, 0.038mm etc.
7	Use	Grading Standard Testing Sieve Test Sieve for soil test sieve, aggregate sieve, concrete test sieve, cement test sieve, asphalt test sieve, wet sieve, wire mesh sieve, perforated sieve, astm sieve, en sieve

Sieve Frame Material	Stainless steel sieve
Screen Material	Plated mild steel
Sieve height	200 x 50mm, 300mm x 75mm, 315mm x 75mm, 350mm x 75mm, 400mm x 65mm, 450mm x 110mm Half Height: 200 x 25mm, 300mm x 38mm
Aperture size (Round Hole)	1mm - 125mm
Aperture size (Square Hole)	4mm - 125mm
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