Read 05-RON-008 Wire Cloth Specs.qxd text version

MESH SPECIFICATIONS

Ron-Vik works with both wire and synthetic meshes to offer you the greatest design flexibility. These materials are woven in much the same way as the fabrics used in our clothing. Mesh offers very good flow characteristics, low cost and a wide range of opening sizes. We stock from 1" down to 1 micron openings (.0000394"). The mesh chart on the following page is for wire mesh only but can be used as a reference for synthetic meshes. There is no standardization of synthetic mesh sizes so consult your Ron-Vik representative for more information.

Terminology

Mesh Number of wires per linear inch measured from center of wire to center of wire. Warp Vertical direction of wires, which run the length of the roll. First number in the mesh specification. Shute Horizontal direction of wires. Sometimes referred to as weft. Square Mesh Mesh count is identical on both warp and shute directions. Off Count A plain weave mesh that has a greater number of wires per inch in one direction -- usually the warp direction (40x36, 60x50). Wire Diameter Normally referred to in decimal parts of an inch, a determining factor in the mesh count (0.025", 0.0085", 0.0012", 0.0008"). Opening The dimension between parallel adjacent wires, usually in decimal parts of an inch or microns. Open Area The percentage of opening of a given mesh utilizing a given wire diameter. This is not given for Dutch weaves.

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Conversion Factors

Particle Retention The size particle that will be retained by a given mesh ­ usually expressed in microns. In both types of Dutch Weave the sum derived from the multiplying of the number of weft wires in a given measurement by their diameter results in theory, on a specification with no open space. Because the wires are forced tightly together during the weaving process, the aperture size cannot be determined in the normal manner. There are two methods by which the aperture size can be determined (see Bubble Point Test and Glass Bead Test). Bubble Point Test The pressure required to pass air bubbles through the mesh (covered by a test liquid) is measured. The average size can then be calculated by taking into account surface tension, liquid density, temperature and immersion depth. Glass Bead Test A suspension containing glass beads is passed through the mesh, the diameter of the largest bead passing through is considered as the absolute micron retention. Inches to microns Inches x 25,400 = microns Microns to inches Microns / 25,400 = inches Opening width Opening = 1 - DM M (D = Wire diameter, M = mesh) Percentage of open area % of open area = (OM)2 x 100 (O = opening, D = wire diameter)

Types of Weave

Plain Weave Mesh in which each warp and each shute wire/thread passes over one and under the next adjacent complimentary wire/thread in both directions. This is the simplest, most commonly used weave. Also called "Square Weave". Twilled Weave Mesh where each shute wire/thread passes successively over two and under two warp wires/threads and each warp wire passes successively over two and under two shute wires/threads. Plain-Dutch Weave* The pattern of this mesh is the same as in plain weave except that the warp wires are of a larger diameter than the shute wires and the shute wires are driven up close to each other, resulting in tapered or wedge-shaped openings instead of square openings. In Dutch weave the warp wires remain in straight condition and the shute wires are crimped.

Twilled-Dutch Weave* Wire cloth which has the twilled weave except the warp wires are of a larger diameter than the shute wires and the shute wires are driven up close to each other, resulting in tapered or wedge-shaped openings. Warp wires remain in a straight condition, but the shute wires take all the crimp. Due to the twilled weave construction, the shute wires are not only deformed in depth (crimps when formed around the warp wires) but also sideways. *Wire meshes only

WIre Mesh

The following is a sample of common materials used for wire mesh, however, other materials are available. Stainless Steels Rapidly replacing other alloys because of their ability to show longer life under severe corrosive and temperature conditions. The principal stainless steels used for wire cloth are: Type 304 - The basic stainless alloy (18% chrome, 8% nickel) and is the most extensively used to weave wire cloth. It has excellent corrosion resistance, which is satisfactory for most applications. T304 melts at 2,600 deg F (1430 C) but its maximum recommended temperature for continuous service is 1,450 deg F (760 C) and is useful for intermediate service up to 1,650 deg F (900 C). Where no type is specified, it is assumed that Type 304 is acceptable for your application. Type 316 - The same as 304 with additional 2 % minimum molybdenum to provide increased corrosion resistance to salts and acids. In addition, it has increased strength at high temperatures. T316 melts at 2,500 deg F (1,375 C) but its maximum recommended temperature for continuous service is 1,500 deg F (815 C) and is useful for intermediate service up to 1,650 deg F (900 C). Steel (Plain) Used in applications where corrosion or abrasion resistance are not controlling factors. Low cost, high tensile strength and ductility makes it popular in manufacturing operations. Nickel Based Alloys Inconel* alloy 600 - A high chromium alloy (nickel 76.0%, chromium 15.8%, iron 7.2%) used for corrosion resistance and temperatures up to approximately 1800 degrees F. Monel ® alloy 400 - A high nickel copper alloy which is one of the most widely used alloys of corrosion resistance. It has the strength of a mild steel and will not corrode in a great many solutions found in industrial applications. Aluminum Known for its lightness and high strength to weight ratio, aluminum has good corrosion resistance, electrical conductivity and thermal conductivity. Copper Copper has some of the most favorable corrosion-resistant properties, but its relatively low tensile strength and high ductility limits its application, therefore a copper alloy is usually preferred for wire cloth. Commercial or pure copper is sometimes used for its electrical properties. Brass Standard brass (copper 65%, zinc 35%) has a high strength and ductility for severe cold with a mild corrosion resistance. Commercial Bronze A higher copper alloy (copper 90%, zinc 10%) used in cases where better corrosion resistance than brass is required. Phosphor Bronze An alloy of copper and tin (1 1/4% to 10%) deoxidized with phosphorous. It is strong and resistant to corrosion from sea water and many other media.

Synthetic Mesh

The following are the most commonly used synthetic materials for filter and strainer applications. Other materials are available. Nylon Nylon mesh is the most commonly used synthetic material for strainer and filter applications. It is strong, flexible and elastic. Nylon is highly resistant to solvents, automotive fluids and alkalies. Polyester Polyester is widely used for its resistance to acids and most solvents. It is an inelastic material that has good strength and good UV resistance. Polypropylene Polypropylene has excellent resistance to most acids and bases. It has moderate strength and limited UV resistance.

MICRONIC MESH

Nominal Micron 200 80 100 65 55 55 40 30 25 20 15 10 5 2 Mesh 12 24 20 30 30 40 50 120 80 200 165 165 200 325 x x x x x x x x x x x x x x 64 110 250 150 250 200 250 600 700 600 800 1400 1400 2300 Type of Weave PDW PDW TDW PDW TDW PDW PDW TDW TDW TDW TDW TDW TDW TDW Wire Diameter .023 .015 .010 .009 .010 .007 .0055 .004 .004 .0024 .0029 .0028 .0028 .0014 x x x x x x x x x x x x x x .0165 .0105 .0085 .007 .008 .0055 .0045 .0023 .003 .0018 .002 .0016 .0016 .0011 Absolute* Micron 280 120 115 100 100 75 60 40 35 30 25 17 13 8

PLAIN AND TWILLED WEAVE

Wire Diameter 8 MESH .063 .047 .035 .032 .028 .023 .017 .047 .035 .032 .025 .020 .035 .028 .023 .018 .013 .025 .020 .018 .032 .028 .023 .018 .009 .017 .009 .023 .020 .016 .014 .009 .014 .013 .012 .011 .0095 .0065 .012 .011 .013 .010 .009 .009 .008 Opening Width .062 .078 .090 .093 .097 .102 .108 .053 .065 .068 .075 .080 .048 .055 .060 .065 .070 .046 .051 .053 .031 .035 .040 .045 .054 .039 .047 % of Open Area 24.6% 38.9% 51.8% 55.4% 60.2% 66.6% 74.6% 28.1% 42.3% 46.2% 56.3% 64.0% 33.2% 43.6% 51.8% 60.8% 70.6% 41.5% 51.0% 55.1% 23.8% 30.5% 39.9% 50.7% 73.3% 48.3% 70.4% Stainless Steel WT.LBs/100ft2 218.5 122.1 65.8 54.6 41.5 27.8 15.0 149.9 83.9 69.5 41.6 26.4 103.1 64.1 42.6 25.8 14.4 59.9 37.6 30.2 113.0 84.4 58.3 34.8 8.6 35.1 9.6

PLAIN AND TWILLED WEAVE

Wire Diameter 60 MESH .011T .009 .0075 .0065 .0045 .0065 .007T .0055 .0037 .0045 .004 .0037 .0034 .0022 .0026 .0019 .0018 .0023T .0021 .0016 .0014 .0016 .0016T .0015T .0014T .0011T .001T .0008T Opening Width .0057 .008 .009 .010 .012 .008 .0055 .007 .0088 .0055 .0043 .0046 .0043 .0047 .0041 .0042 .0038 .0027 .0029 .0034 .0029 .0024 .0021 .0018 .0017 .0014 .001 .0008 % of Open Area 11.7% 21.3% 30.5% 37.5% 53.3% 29.8% 19.4% 31.4% 49.6% 30.3% 26.6% 30.5% 31.2% 46.4% 37.8% 47.1% 46.0% 29.1% 33.6% 46.2% 46.0% 36.0% 32.1% 29.2% 30.5% 31.4% 25.0% 25.8% Stainless Steel WT.LBs/100ft2 53.4 33.8 23.9 17.6 8.1 21.0 27.7 17.1 6.9 15.7 14.5 11.3 11.6 4.7 7.2 3.9 4.7 8.1 6.3 3.7 3.1 4.3 4.8 4.7 4.3 3.4 3.2 2.7

70 MESH 80 MESH

10 MESH

100 MESH 120 MESH

12 MESH PDW = Plain Dutch Weave TDW = Twilled Dutch Weave

130 MESH 145 MESH

PLAIN AND TWILLED WEAVE

Wire Diameter 1 MESH .120 .105 * .080 .063 .120 .080 * .063 * .047 .041 .063 * .047 .032 .120 .080 .063 * .047 .035 * .032 * .028 .025 .080 .047 .041 .023 .063 .047 .035 Opening Width .880 .895 .920 .937 .380 .420 .437 .453 .459 .270 .286 .301 .130 .170 .187 .203 .215 .218 .222 .225 .120 .153 .159 .177 .104 .120 .132 % of Open Area 77.4% 80.1% 84.6% 87.8% 57.8% 70.6% 76.4% 82.1% 84.3% 65.6% 73.6% 81.5% 27.0% 46.2% 56.0% 65.9% 74.0% 76.0% 78.9% 81.0% 36.0% 58.5% 63.2% 78.3% 38.9% 51.8% 62.7% Stainless Steel WT.LBs/100ft2 93.7 71.7 41.5 25.8 191.5 83.8 51.7 28.7 21.8 78.4 43.2 19.9 392.5 173.8 105.8 58.2 32.0 26.7 20.4 16.3 222.8 73.3 55.4 17.2 164.6 89.1 48.6

14 MESH

150 MESH 165 MESH

16 MESH

180 MESH 200 MESH

2 MESH

18 MESH

230 MESH 250 MESH

20 MESH

3 MESH

.030 .034 .036 .041 .028 .020 .021 .022 .027 .017 .018 .012 .015 .016 .011 .012

36.0% 46.2% 51.8% 67.2% 44.2% 37.1% 40.8% 44.8% 64.8% 33.8% 37.9% 23.0% 36.0% 41.0% 30.3% 36.0%

55.8 34.7 26.4 10.6 32.1 35.1 29.7 24.7 8.4 35.4 29.3 49.3 27.9 22.2 28.7 22.3

270 MESH 300 MESH 325 MESH 400 MESH 500 MESH 635 MESH

4 MESH

24 MESH 30 MESH

35 MESH 5 MESH

40 MESH

OFF COUNT MESHES

Wire Diameter 40 x 36 60 x 50 .009 .0065 .007 .0045 Opening Width .016 x .019 .010 x .0135 .007 x .009 .0055 x .0066 % of Open Area 40.8% 41.3% 34.5% 32.7% Stainless Steel WT.LBs/100ft2 22.0 15.3 15.0 11.7

6 MESH

50 MESH

Micron A unit of length in the metric system. One micron is 1/1000th millimeter, which is equivalent to 0.00003937 of an inch. *Absolute filtration rating A measure of retention, expressed in microns, that specifies the equivalent diameter of the smallest particle for which the filter has a retention of 100%. In actual practice, most manufacturers assign absolute ratings on the basis of the retention in the range from 98% - 99.999999%.

80 x 70 100 x 90

* Also available in a T304 welded mesh T Twilled Weave

800 Colorado Avenue South Minneapolis, Minnesota 55416 Tel: 763.545.0276 or 800.328.0598 Fax: 763.545.0142 or 800.775.6239

Fitness for Use and Sellers Liability

The user is responsible for determining whether the Ron-Vik product is fit for a particular purpose and is suitable for the user's method of functional application. It is essential that the user evaluate the Ron-Vik product by inspection and/or testing to assure that the product meets all the design specifications/validation criteria. Ron-Vik's liability shall be limited to the stated selling price of any defective goods, and shall in no way include purchaser's lost profits or goodwill or any other special or consequential damages incurred by the purchaser.

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