APERTURE VERSE WIRE THICKNESS

Often apertures with a far too thick wire are ordered and with screening it is all about efficiencies therefore open area is extremely important , the more holes you have the greater chance your product will find a hole to pass through and that in turn will minimise the sliding abrasion over your screens.

Screen life is often confused with screening efficiency , most would like to see their screens last for months and with that in mind order the thickest wire possible for that aperture however the screen will have far less holes which allows your product to spend more time on the screens wearing them down rather than passing through .

The decision remains , life of the screens or higher plant efficiencies which result in more tonnages being screened.

The below table illustrates the suggested aperture verse wire for a specific feed size and kg per cubic metre for square apertures

	A Heavy		B Medium Heavy		C Medium		D Light		Feed Size
Aperture	Wire	Oa%	Wire	Oa%	Wire	Oa%	Wire	Oa%	1	2	3
100	20	69	16	74	12.5	79	11.2	81	180	215	250
90	16	72	12.5	77	11.2	79	10.0	81	150	190	230
76	16	68	12.5	74	11.2	76	10.0	78	150	190	230
70	12.5	72	11.2	74	10.0	77	9.0	79	125	165	200
65	12.5	70	11.2	73	10.0	75	10.0	75	125	165	200
56	12.5	67	10.0	72	9.0	74	8.0	77	125	165	200
50	12.5	64	10.0	69	9.0	72	8.0	74	125	165	200
48	11.2	66	9.0	71	8.0	73	7.1	76	115	140	180
44	11.2	64	9.0	69	8.0	72	7.1	74	115	140	180
42	11.2	62	9.0	68	8.0	71	6.0	77	115	140	180
38	10.0	63	8.0	68	7.1	71	6.0	75	100	125	150
36	10.0	61	8.0	67	6.0	73	5.6	75	100	125	150
32	10.0	58	8.0	64	6.0	71	5.0	75	100	125	150
28	9.0	57	7.1	64	6.0	68	5.0	72	90	115	130
25	8.0	57	6.0	65	5.6	69	5.0	69	90	115	130
22	7.5	56	5.6	64	5.0	66	4.5	69	75	95	115
19	7.1	53	5.6	60	4.5	65	4.0	68	75	95	115
16	6.0	53	5.0	58	4.5	61	3.6	67	65	80	95
14	5.0	54	4.5	57	4.0	60	3.15	67	65	80	95
12	5.0	50	4.5	53	3.6	60	2.8	66	50	65	75
11	4.5	50	4.0	54	3.15	60	2.8	64	50	65	75
10	4.0	51	3.6	54	3.15	58	2.5	64	38	50	65
8	3.6	48	3.15	51	2.8	55	2.0	64	38	50	65
6	3.15	43	2.8	46	2.5	50	1.8	59	25	38	50
5	2.5	44	2.0	51	1.6	57	1.2	65	19	25	38
2	1.25	38	1.0	44	0.9	48	0.71	54	12	16	19
1.6	1.0	38	0.9	41	0.8	44	-	-	10	12	16
1.4	0.9	37	0.8	40	0.71	44	-	-	8	10	12
1.25	0.8	37	0.71	41	-	-	-	-	6	8	10

Wire sizes listed above are suitable for feed sizes in column 1.When feed size exceeds column 1 but not column 2 use the next larger wire (if available).When it exceeds column 2 but not column 3 increase wire diameter two sizes (if available).When column 3 is exceeded a relief deck is recommended to increase life of wire.

We suggest once you have installed new screens allow the deck to run empty for 5 minutes, stop machine re-tighten tensioning bolts,ensure there is nosing rubber on camber bars at all times to avoid premature failure of screens.