WOVEN EXPERTISE
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WOVEN EXPERTISE INTERESTING FACTS ABOUT SOLIDWEAVE MEDIA

02|03 INTRODUCTION | PRODUCT DEVELOPMENT + SIMULATION | DEFINITION | MESH TYPES GKD – INNOVATOR + WORLD MARKET LEADER As a privately owned technical weaving mill, GKD – GEBR. many of its competitors. GKD meshes are therefore used to KUFFERATH AG is the world market leader in woven solutions create efficient systems, equipment and components integra- made of metal and plastic. Under the mission WORLD WIDE ted perfectly in the customer’s process. WEAVE, our company bundles four independent business divisions: SOLIDWEAVE (industrial mesh), WEAVE IN MOTION With seven plants in Germany...

WOVEN STRUCTURES FOR INDUSTRIAL APPLICATIONS Innovative technology, a focus on development and cost lea- CERTIFIED MANUFACTURING PROCESSES dership make the SOLIDWEAVE business unit a provider of We guarantee our first-class quality as well as the very high- state-of-the-art media made of metallic wire mesh and other est manufacturing standards through certified processes. This materials. Our product portfolio covers a variety of media allows us to produce some of the most reliable, high-perfor- and components for mechanical process technology. mance filter media in the world. We adapt...

04|05 INTRODUCTION | PRODUCT DEVELOPMENT + SIMULATION | DEFINITIONS | MESH TYPES INDIVIDUAL PRODUCT DEVELOPMENT From the initial contact right through to the finished end pro- quality, we continuously work on new technical meshes and duct, our customers benefit from the support of experienced filtration systems. What’s more, the entire process chain at GKD development and application engineers. Together with GKD is closely interlinked – starting from the development of our customers, they define the requirements in detail when new products, right through to manufacturing and quality...

POSSIBILITIES OF MESH SIMULATION The use of the very latest simulation software enables new meshes to be developed quickly while keeping costs down SIMULATION CALCULATIONS (SELECTION) through rapid prototyping. In doing so, we can design single MAXIMUM PORE SIZE and multi-layer mesh designs on a computer using a comple- PORE SIZE DISTRIBUTION tely virtual process. The subsequent flow simulations then allow us to make predictions on permeability or flow resistance at an early stage. It is also possible to simulate filtration given a MESH BOTTLENECK specified particle size distribution. Only...

06|07 INTRODUCTION | PRODUCT DEVELOPMENT + SIMULATION | DEFINITIONS | MESH TYPES DEFINITIONS WARP/WARP DIRECTION MESH NUMBER/MESH COUNT Wires that are attached in the longitudinal direction on the Numerical description of the weave pattern in centimeters or loom and run parallel to the unwound length of the mesh inches (1 inch = 25.4 mm). In the case of mesh count, “mesh” is often used. The first number always describes the number of warp wires, while the second figure indicates the number WEFT/WEFT DIRECTION of weft wires. Examples: 9.4/43.3 per cm or 24/110 mesh. Wires that are attached...

Formula for determining open area Geometric pore size, twilled dutch weave w = mesh opening in mm d = wire diameter in mm t = w + d = spacing in mm FO = open mesh area AVIF projects A 224 and A 251. If this calculation method Permeability increases along with the open mesh area of the does not apply for some meshes, the pore size is determined mesh. The definition is based on DIN ISO 9044 and is only physically through the glass bead test. valid and feasible for the aforementioned mesh types. All other filter media cannot be meaningfully defined on the basis of OPEN MESH AREA [%] The...

08|09 INTRODUCTION | PRODUCT DEVELOPMENT + SIMULATION | DEFINITIONS | MESH TYPES RETENTION RATE [%] rential pressure of 20,000 Pa (2 m H2O or 200 mbar). This is Value indicating the amount of solids retained by the filter in measured in l / (cm² * min). The values for other media (also percent. When filtering liquids, the retention rate is given on non-Newtonian) can be calculated at GKD using a simulation the basis of a defined particle size or particle size distribution. tool. All such data is valid for single-layer mesh structures For gas filtration, this is specified based on separated...

therefore only be used as a meaningful criterion in measure- ments comparing similar filter media. Even when the specific The material grade for manufacturing a wire mesh is an impor- capillary pressure constant of the mesh is known, comparisons tant component of every mesh definition. The choice of ma- of different filter media (e.g. nonwovens and mesh) are only terial is based on the user’s requirements and selection. It must of limited relevance. The bubble point originates from the be taken into account that wires of unlimited fineness cannot ASTM F316-03 and ASTM E1294 standards. be...

10|11 INTRODUCTION | PRODUCT DEVELOPMENT + SIMULATION | DEFINITIONS | MESH TYPES SQUARE WEAVE (SW): THE CLASSIC CHOICE Square weaves are made of stainless steel or other material combinations. At GKD they are produced as plain weave (1/1) APPLICATIONS (SELECTION) or twilled weave (2/2). The apertures range between 0.025 mm and 14 mm as standard. Depending on the aperture, pro- duction widths of between 1.3 m and 3 m are possible. Cus- tomized versions can be realized with a width of up to 8.1 m. Standard materials are stainless steels 316 / 316 L as well LIGHTNING STRIKE PROTECTION as...

OBLONG AND BROAD WEAVES: MORE OPEN MESH AREA Oblong and broad weaves are a further development of square weave for increasing the open mesh area. With oblong weaves APPLICATIONS (SELECTION) the number of weft wires is reduced, thus enlarging the weave in the warp direction. Broad weaves, on the other hand, have a reduced number of warp wires, enlarging the weave in the weft direction. The typical weave ratio of this asymmetrical mesh is 3:1. Customized weave ratios for specific customer requirements are also possible.