The test sieves conform to the Indian Standards, and satisfy requirements of IS : 460 (Part-I) 1978 for the wire cloth test sieves and IS : 460 (part II) 1978 for perforated plate test sieves with respect to widths of aperture, permissible variations in aperture, wire diameter and screening areas.
The sieves from 22 micron to 3..35 mm size are available in 200 mm and have woven wire cloth fixed in spun brass frames, from 40 mm to 53 mm size are available in 300 mm size and from 63 mm to 125 mm size in 450 mm diameter.
The sieves of size 5.6 mm and above in 300 mm or 450 mm dia. are either of woven wire or perforated sheet and are fitted in G.I. Frames as per the requirement.
Aperture Size Aperture Size
3.35 mm 850 µm
2.80 mm 710 µm
2.36 mm 600 µm
3.00 mm 500 µm
1.70 mm 425 µm
1.40 mm 355 µm
1.18 mm 300 µm
1.00 mm 250 µm
212 µm 63 µm
180 µm 53 µm
150 µm 45 µm
125 µm 38 µm
106 µm 32 µm
90 µm 26 µm
75 µm 22 µm
Aperture Size Aperture Size
5.60 mm 300 um
4.75 mm 250 um
4.00 mm 212 um
3.35 mm 180 um
2.80 mm 150 um
2.36 mm 125 um
2.00 mm 106 um
1.70 mm 90 um
1.40 mm 75 um
1.18 mm 63 um
1.00 mm 53 um
850 um 45 um
710 um 38 um
600 um 32 um
500 um 26 um
425 um 22 um
355 um
Aperture Size Aperture Size
53 mm 16.0 mm
45 mm 13.2 mm
37.5 mm 11.2 mm
31.5 mm 9.5 mm
26.5 mm 8.0 mm
22.4 mm 6.7 mm
19.0 mm 5.6 mm
4.75 mm 4.0 mm
Aperture Size Aperture Size
125 mm 22.4 mm
106 mm 19.0 mm
90.9 mm 16.0 mm
75.0 mm 13.2 mm
63.0 mm 11.2 mm
53.0 mm 9.5 mm
45.0 mm 8.0 mm
37.5 mm 6.7 mm
31.5 mm 5.6 mm
26.5 mm 4.75 mm
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