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Test Sieve

Overview of Test Sieve:
Test sieve is also called testing sieve, lab sieve, laboratory sieve, test screen, lab screen, experimental sieve, standard sieve, inspection sieve, standard test sieve, sampling sieve, particle sieve, analysis sieve, checking sifter, soil sieve, sieve set, pharmacopeia screen, earth-rock sieve, sediment sieve, aggregate sieve, coal sample sieve, sieve set grizzly, standard screening test fixture, stainless steel standard sieve etc.
 
Function of Test Sieve:
Test sieve is a tool for material particle size classification and detection. It is a sieve that is inspected, identified and agreed by the designated institution, which is an important symbol that is different from general sieve.
 
Application of Test Sieve:
It is mainly used for particle size analysis and detection, widely used in abrasive, geological prospecting, metallurgy, pharmacopoeia, chemical building materials and other industries for particle materials screening and testing.
 
Structure of Test Sieve:
Test sieve frame, screen cover and screen bottom are made of high quality stainless steel.
(1) screen frame:
1. The screen frame adopts high quality stainless steel and one-time drawing shaping, surface polishing and with fine appearance. Closely cooperate, no leakage of material and water. The wall thickness is 0.6~0.7mm. The surface surface is so bright that it can serve as a mirror. Integral forming, strong and durable, no magnetism.
2. The screen and frame are fixed by tin soldering. The connection is firm, no slack, no gap and no jam.
3. It can be resistant to 400 degrees celsius high temperature, and can be used for inorganic and organic solution.  
4. Due to the use of stretching and forming, the dimensions are unified. And the upper and lower sieve frame adopt conical surface matching (consistent with the valve sealing method),which are completely sealed after the upper and lower installation. Meanwhile, due to the electrical conductivity between the frames, avoiding the electrostatic adsorption (consistent with the structure of the Taylor screen in the United States). The fine granule is smoothly flowed. If the user request, it also can be equipped with the sealing ring, but considering the electrostatic problem and the seal has reached the requirement, we generally do not use.
5. Height: 50mm (General), 23mm (Short)
Diameter of the frame: 8 inch, 12 inch, 75mm, 200mm, 300mm
 
(2) mesh screen:
The mesh is accurate. The screen is marked by standard screen size and mesh size, so the mesh with the same specification is identical at different time.
The commonly used material of screen is brass, tin bronze and stainless steel.
2.36um~100um adopt nickel plating, which can not only improve the precision of mesh hole, but also prevent the mesh deformation. Hardness, wear-resisting and durability of mesh holes. Strong, wear-resistant and durable.
 
Screen Surface of Test Sieve:
According to the screen material, test sieve is divided into woven wire mesh test sieve, metal perforated plate test sieve and electrical forming test sieve.

Screen Type Standard Basic Size of the Mesh
Woven Wire Mesh  GB/T6003.1-1997,
 comply with international  standard ISO3310-1:1990 R20/3, R20,  R40/3 series
 2.36mm~0.015mm,
 square hole:  2.36mm~0.02mm
 triangle hole: to  0.005mm
Metal Perforated Plate (Punching Board)  GB/T6003.2-1997,
 comply with international  standard ISO3310-2:1990 R20/3, R20,  R40/3 series
 32mm~1mm,
 mainly used in large  mesh test sieve  (>3mm)
Electrical Forming  GB/T6003.3-1997  0.50mm~0.005mm,
 hole size absolute  tolerance 2~3um
 φ75*25mm

screen surface

Particle Size Conversion Chart:

B.S.S Mesh A.S.T.M. Mesh Tyler Mesh I.S.S Mesh Micron mm
4 5 5 4000 4.00
6 7 7 280 2812 2.81
8 10 9 200 2057 2.05
10 12 10 170 1680 1.68
12 14 12 150 1405 1.40
14 16 14 120 1240 1.20
16 18 16 100 1003 1.00
18 20 20 85 850 0.85
22 25 24 70 710 0.71
30 35 32 50 500 0.50
36 40 35 40 420 0.42
44 45 42 35 355 0.35
52 50 48 30 300 0.30
60 60 60 25 250 0.25
72 70 65 20 210 0.21
85 80 80 18 180 0.18
100 100 100 15 150 0.15
120 120 115 12 125 0.12
150 140 150 10 105 0.10
170 170 170 9 90 0.09
200 200 200 8 75 0.075
240 230 250 6 63 0.063
300 270 270 5 53 0.053
350 325 325 4 45 0.045
400 400 400 37 0.037
500 500 500 25 0.025
625 625 625 20 0.020
 
Screen Mesh Comparison Table:

Mesh μm Mesh μm
2 8000 100 150
3 6700 115 125
4 4750 120 120
5 4000 125 115
6 3350 130 113
7 2800 140 109
8 2360 150 106
10 1700 160 96
12 1400 170 90
14 1180 175 86
16 1000 180 80
18 880 200 75
20 830 230 62
24 700 240 61
28 600 250 58
30 550 270 53
32 500 300 48
35 425 325 45
40 380 400 38
42 355 500 25
45 325 600 23
48 300 800 18
50 270 1000 13
60 250 1340 10
65 230 2000 6.5
70 212 5000 2.6
80 180 8000 1.6
90 160 10000 1.3
 

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