WIRE CLOTH SPECIFICATION GUIDE

Woven Wire Filter Cloth

FILTER CLOTH SPECIFICATIONS
	Woven metal wire cloth has been used for filtration applications for years.  Filter Cloth mesh specifications offer improved results when used in liquid filtration applications.  Filter Cloth's unique geometry calls for two different wire diameters; a heavier one to support the load in one direction and smaller running in the other direction driven up close to each other to set the aperture size of the mesh.  The shape of the resulting opening is not a straight through square opening as it is when using a Square Weave, the irregular shaped opening captures particles and allows for cleaning of the filter cloth. The different Filter Cloth weave types provide for different characteristics of the mesh being considered.
	Type of Weave		Mesh Count				Wire Dia. (inches)	Absolute Filter Rating (microns)	Nominal Filter Rating (microns)
	PLAIN DUTCH WEAVE
			80 x 400				.0049 x .0028	40 - 45	35
	Plain Dutch Weaves can handle high flow rates with relatively low pressure drop.  They are woven with each warp and shute wire passing over-and-under one wire.  The shute wires, however, are smaller in diameter than the warp wires and are driven close together to create a dense weave		50 x 250				.0055 x .0045	58 - 63	40
			40 x 200				.0070 x .0055	70 - 75	55
			30 x 150				.0090 x .0070	95 - 100	65
			24 x 110				.0150 x .0100	115 - 125	80
			20 x 150				.0098 x .0070	150 - 160	100
			14 x 88				.0200 x .0130	220 - 240	150
			12 x 64				.0240 x .0165	270 - 290	200
			8 x 85				.0140 x .0126	320 - 340	250
	TWILL DUTCH WEAVE
			510 x 3600				.0010 x .0006	5 - 6	<1
	The finest wire cloth particle size retention is achieved in Twill Dutch Weaves.  As the term Twill indicates, the warp and shute wires pass alternately over two and under two wires.  The term Dutch refers to the use of a heavier warp wire diameter and a lighter shute wire diameter.  There are two variations of this weave:  Twill Dutch Double Weave and Twill Dutch Single Weave.  The shute wires in a Twill Dutch Double Weave are positioned so close that there is always a shute wire above and below each warp wire.  This creates a weave completely covering the warp wires.  The resulting geometry of the flo-path is very tortuous, providing excellent particle size control.  In a Twill Dutch Single Weave the shute wires are not as close together as in the Twill Dutch Double.		450 x 2750				.0010 x .0008	6 - 7	<1
			325 x 2300				.0015 x .0010	8 - 9	2
			250 x 1400				.0022 x .0016	11 - 12	4
			200 x 1400				.0028 x .0016	12 - 14	5
			165 x 1400				.0028 x .0016	16 - 18	10
			165 x 800				.0028 x .0020	24 - 26	15
			200 x 600				.0024 x .0018	28 - 32	20
			80 x 700				.0040 x .0030	35 - 38	25
			120 x 600				.0040 x .0025	40 - 45	30
			120 x 400				.0040 x .0025	50 - 55	40
			40 x 560				.0070 x .0040	70 - 75	50
			30 x 360				.0098 x .0060	90 - 100	80
			20 x 250				.0098 x .0079	110 - 120	100
	REVERSE PLAIN DUTCH WEAVE
			850 x 155				.0012 x .0039	14 - 17	10
	The warp and shute wires are reversed from those in a Plain Dutch Weave.  The warp wires have a smaller diameter than the shute wires and touch each other, while the heavier shute wires are woven as tightly as possible together		720 x 150				.0014 x .0043	18 - 21	15
			600 x 125				.0017 x .0049	23 - 26	20
			600 x 100				.0017 x .0055	35 - 38	25
			280 x 70				.0035 x .0083	54 - 60	45
			400 x 125				.0026 x .0039	56 - 62	50
			175 x 50				.0057 x .0120	65 - 72	60
			130 x 35				.0079 x .0157	95 - 105	80
			140 x 40				.0075 x .0150	110 - 125	100