wire mesh

Frame Gaskets

DESCRIPTION: Frame mounted gaskets incorporate a length of MESH STRIP monel or Ferrex gasketing (with or without elastomer core), securely crimped into the edge of extruded aluminum
mounting frames. Allowing simple mechanical mounting, the aluminum frame also provides a positive compression stop to prevent over-compression of the gasket.

The aluminum frame attaches easily to a flange surface with spot welds, rivets,bolts or sheet metal screws. The frame can serve as a load-bearing element, able to meet most shock and vibration requirements.

Frames can be supplied unfinished, chromate finished to MIL-C-5541, Class 3, or painted. Double-gasket versions feature a MESH STRIP gasket on both edges, or one MESH STRIP gasket and one environmental sealing gasket.

Note: These gaskets should generally not be used in salt spray or shipboard environments. Both monel and Ferex mesh will cause galvanic corrosion of aluminum flanges. Silver-plated-aluminum filled elastomer gaskets are recommended on aluminum flanges in salt spray environments.
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Mesh Strip

DESCRIPTION: MESH STRIP gaskets are compressible, all-metal EMI/EMP strips knitted into
rectangular or round cross sections. The knitted wire forms many spring-like interlocked loops, making it highly resilient. Standard MESH STRIP gaskets are knitted from either monel (a nickel-copper alloy) or Ferrex* (tin-plated, copper-clad steel) wire. Chomerics also provides SPRINGMESH gaskets, special all-metal spring wire knitted mesh strips in a hollow tube shape with compression-deflection characteristics.
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Mesh Strip With Elastomer

DESCRIPTION: Standard MESH STRIP gasketing with elastomer core consists of two layers of wire mesh knitted around a rectangular or round core of neoprene or silicone. The knitted wire mesh provides the electrical conductivity for EMI/EMP shielding, and the core provides excellent compressibility with a high degree of resilience. Closing force is in the 50-100 psi (0.34-0.69 MPa) range. Elastomer core MESH STRIP gasketing does not provide pressure sealing, but it does provide a seal against dust, rain, ventilating air and other limited environmental conditions. The standard wire materials are monel (a nickel-copper alloy) and Ferrex** (tin-plated, copper-clad steel). Other metals and alloys such as aluminum mesh are available. Monel is used most frequently due to its good aging properties, excellent tensile strength and spring-like qualities. Ferrex offers the best EMI shielding performance, especially in H-fields, but has limited corrosion resistance.

**Ferrex is Chomerics' tin-plated, copper-clad steel wire per ASTM B-520. ASTM (QQ-W-343) tin-plate, 2-3% by weight; ASTM B-227 copper-cladding 30-40% by weight, SAE 1010 steel wire, balance by weight.
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Shield Mesh gasket

DESCRIPTION: SHIELDMESH compressed mesh EMI gaskets are jointless, with either round or
rectangular cross sections. They are made by die-compressing knitted wire mesh into a wide range of shapes and resiliencies. SHIELDMESH gaskets are designed for applications requiring small round or rectangular EMI seals such as waveguide choke flanges, or for shafts or small housings. Due to high compression set, they are not recommended where mating joints must be opened and closed. Parts are normally supplied as medium density, but this can be varied to suit applications
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Springmesh gaskets

DESCRIPTION:New knitted wire mesh technology offers the advantages of mesh over core without the bulk and expense of a core. Chomerics’ special technique produces a highly resilient, hollow knitted mesh gasket with remarkable recovery even above 70% compression. Compression set is less than 30% at 80% compression.

SPRINGMESH gaskets have a round configuration ideally suited for use as a gasket-in-a-groove. They are made from 0.004 inch (0.10 mm) diameter tin-plated steel wire knitted into a hollow cylinder. Two layers of mesh is the preferred design for maximum EMI protection and compression- deflection performance. Custom constructions are available.
Typical applications include cast housings for outdoor CATV boxes, NEMA enclosures with outboard environmental seals, and industrial enclosures.
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