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Laboratory Metal Sieves

Laboratory Metal Sieves for testing and sizing are made from first class stainless steel woven wire cloth, brass mesh, bronze wire cloth or precisely punched perforated plate mesh. The sieves diameter varies from 12.5cm to 40cm. We also do customizable design.
Metal Sieves for Sizing and Screening
Metal Sieves for Sizing and Screening

 

Laboratory Metal Sieves

Bohes metal lab sieves offer the following benefits:

Long Screen Life:

The screen cloth is held in the frame very tightly by a special process. This design enables clean screening, less screen wear and longer screen life.

No Clogging of Screen:

As the screen vibrates in multiplane hence the holes of the screen remain clear. Additional and blinding system is provided for difficult to screen and wet materials.

Compact Design:

This screen occupies less than half the spaces as occupied by any other screen of same capacity. Useful in wet screening The screen works on solid-liquid separation efficiently.

Minumum blinding of screens:

Due to vibrations in the vertical plane, blinding of screen is minimized. However, for certain materials which have inherent blinding, sticking property and special accessories can be used to eliminate this problem.

Vibration free operation: 

There are no vibrations at the screen base. Even no flooring is needed. You can mount it on Bins, upper floors, planks or wherever it is most suited.

Low on power and maintainence / High on efficiency: 

The design enables to utilize the vibratory force generated by the motor to the optimum and very few moving parts reduce the maintenance to minimum.

Metal test sieve(in ss materials) specification
Sieve Material Stainless Steel 304/316/316L,etc.
Technology Woven
Standard ASTM E11-09      ISO3310-1
Sieve Diameter 3" 6" 8" 10" 12" 200mm 300mm
Frame Material SS brass , etc.
Height (full) 1-3/4'' -- 2-5/8''
Aperture shape Square
Mesh opening / Aperture 5--500mesh

 

Standard Metal Testing Sieves ASTM Specification E-11
Nominal Dimensions, Permissible Variations for Wire Cloth of Metal Standard Test Sieves Series
Sieve Designation Norminal Sieve Opening
inch (c)
Permissible Variation of Average Opening from the Standard Sieve Designation Opening Dimension Exceeded by not more than 5% of the openings Maximum Individual Opening Nominal Diameter
mm (a)
Standard(b) Alternative
125mm 5" 5 ±3.70mm 130.0mm 130.9mm 8
106mm 4.24" 4.24 ±3.20mm 110.2mm 111.1mm 6.3
100mm (d) 4" 4 ±3.00mm 104.0mm 104.8mm 6.3
90mm 3.5" 3.5 ±2.70mm 93.6mm 94.4mm 6.3
75mm 3" 3 ±2.20mm 78.1mm 78.7mm 6.3
63mm 2.5" 2.5 ±1.90mm 65.6mm 66.2mm 5.6
53mm 2.5" 2.12 ±1.60mm 55.2mm 55.7mm 5
50mm (d) 2" 2 ±1.50mm 52.1mm 52.6mm 5
45mm 1.75" 1.75 ±1.40mm 46.9mm 47.4mm 4.5
37.5mm 1.5" 1.5 ±1.10mm 39.1mm 39.5mm 4.5
31.5mm 1.25" 1.25 ±1.00mm 32.9mm 33.2mm 4
26.5mm 1.06" 1.06 ±0.800mm 27.7mm 28.0mm 3.55
25.0mm 1.00" 1 ±0.800mm 26.1mm 26.4mm 3.55
22.4mm 0.875" 0.875 ±0.700mm 23.4mm 23.7mm 3.55
19.0mm 0.75" 0.75 ±0.600mm 19.9mm 20.1mm 3.15
16.0mm 0.625" 0.625 ±0.500mm 16.7mm 17.0mm 3.15
13.2mm 0.530" 0.53 ±0.410mm 13.83mm 14.05mm 2.8
12.5mm (d) 0.5" 0.5 ±0.390mm 13.10mm 13.31mm 2.5
11.2mm 7.0625" 0.438 ±0.350mm 11.75mm 11.94mm 2.5
9.5mm 0.375" 0.375 ±0.300mm 9.97mm 10.16mm 2.24
8.0mm 0.3125" 0.312 ±0.250mm 8.41mm 8.58mm 2
6.7mm 0.265" 0.265 ±0.210mm 7.05mm 7.20mm 1.8
6.3mm (d) 0.25" 0.25 ±0.200mm 6.64mm 6.78mm 1.8
5.6mm No. 3.5 (e) 0.223 ±0.180mm 5.90mm 6.04mm 1.6
4.75mm No. 4 0.187 ±0.150mm 5.02mm 5.146mm 1.6
4.0mm No. 5 0.157 ±0.130mm 4.23mm 4.35mm 1.4
3.35mm No. 6 0.132 ±0.110mm 3.55mm 3.66mm 1.25
2.8mm No. 7 0.11 ±0.095mm 2.975mm 3.070mm 1.12
2.36mm No. 8 0.0937 ±0.080mm 2.515mm 2.600mm 1
2.0mm No. 10 0.0787 ±0.070mm 2.135mm 2.215mm 0.9
1.7mm No. 12 0.0661 ±0.060mm 1.820mm 1.890mm 0.8
1.4mm No. 14 0.0555 ±0.050mm 1.505mm 1.565mm 0.71
1.18mm No. 16 0.0469 ±0.045mm 1.270mm 1.330mm 0.63
1.0mm No. 18 0.0394 ±0040mm 1.083mm 1.135mm 0.56
850µm (d) No. 20 0.0331 ±35µm 925µm 970µm 0.5
710µm No. 25 0.0278 ±30µm 775µm 815µm 0.45
600µm No. 30 0.0234 ±25µm 660µm 695µm 0.4
500µm No. 35 0.0197 ±20µm 550µm 585µm 0.315
425µm No. 40 0.0165 ±19µm 471µm 502µm 0.28
355µm No. 45 0.0139 ±16µm 396µm 425µm 0.224
300µm No. 50 0.0117 ±14µm 337µm 363µm 0.2
250µm No. 60 0.0098 ±12µm 283µm 306µm 0.16
212µm No. 70 0.0083 ±10µm 242µm 263µm 0.14
180µm No. 80 0.007 ±9µm 207µm 227µm 0.125
150µm No. 100 0.0059 ±8µm 174µm 192µm 0.1
125µm No. 120 0.0049 ±7µm 147µm 163µm 0.09
106µm No. 140 0.0041 ±6µm 126µm 141µm 0.071
90µm No. 170 0.0035 ±5µm 108µm 122µm 0.063
75µm No. 200 0.0029 ±5µm 91µm 103µm 0.05
63µm No. 230 0.0025 ±4µm 77µm 89µm 0.045
53µm No. 270 0.0021 ±4µm 66µm 76µm 0.036
45µm No. 325 0.0017 ±3µm 57µm 66µm 0.032
38µm No. 400 0.0015 ±3µm 48µm 57µm 0.030
32µm No. 450 0.0012 ±3µm 42µm 50µm 0.028
25µm (d) No. 500 0.001 ±3µm 34µm 41µm 0.025
20µm (d) No. 635 0.0008 ±3µm 29µm 35µm 0.02

 

Bolhes Test Sieve Co.