air flow emi vents

CHO-CELL

DESCRIPTION: CHO-CELL panels are Chomerics’ very high performance shielded honeycomb air vents, especially designed for high frequency environments and to meet TEMPEST specifications. They provide greater than 90 dB attenuation between 200 MHz and 10 GHz. Shielding is typically 30 dB better than conventional panels, achieved by unique design features, which include a CHO-SEAL mounting gasket. CHO-CELL vents are free of polarization effects, provide low air.
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EMI-Air-Flow

DESCRIPTION: Chomerics' steel honeycomb ventilation panels are designed for maximum magnetic (H) field shielding effectiveness. They are especially suited for use in military enclosures, communications shelters, and shielded rooms.They can also be used for ventilation on EMP-hardened and TEMPEST equipment. In applications where environmental concerns are critical, brass honeycomb shielded vents are recommended. They provide optimum EMI shielding performance plus corrosion resistance. These panels are provided in a full range of shapes, including circular, in 0.5 inch (12.7 mm) and 1.0 inch (25.4 mm) thicknesses.
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HONEYCOMB

DESCRIPTION: Parker Process Filtration has been a leader in filter media innovation and
performance since we first invented the Honeycomb™ Filter Tube over 50 years ago. Parker has
one of the world’s largest manufacturing plants for wound cartridges, offering superior quality along with technical, engineering and marketing support. Effective removal ratings at nominal 90% efficiency from 100μm to 0.5μm range.

Applications:
* Animal Oils
* Concentrated Alkalies
* Dilute Acids & Alkalies
* Mineral Acids
* Organic Acids & Solvents
* Oxidizing Agents
* Petroleum Oils
* Photo Solutions
* Potable Liquids
* Vegetable Oils
* Water
* Prefilter for Membranes
* Amines
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Shield Cell and Omni Cell

DESCRIPTION: Ready-to-install SHIELD CELL and OMNI CELL panels provide maximum EMI shielding with minimum pressure drop (air flow resistance) for ventilating air. All styles are composed of metal honeycomb shielding panels in EMI gasketed frames of like material. Panels are ready-to-mount, in such a manner that the frame gasketing is compressed firmly against the shielded housing to maximize shielding performance. Standard framing for all panel designs includes both an EMI shielding gasket and a seal, from a combination of monel knitted wire mesh and sponge neoprene. Panels larger than 12 x 24 in. (305 x 610 mm) are equipped with cross braces.
 
SHIELD CELL Panels: Standard SHIELD CELL panel construction is all-aluminum, with 1/8 in. (3.2 mm) cells, 1/2 in. (12.7 mm) thick. The complete frame/ honeycomb assemblies are chromate conversion coated. Additional sizes available include: 3/16 in. (4.7 mm) cells, 3/4 in. (19 mm) thick; and 1/4 in. (6.4 mm) cells, 1 in. (25.4 mm) thick. Standard aluminum honeycomb is recommended for applications where shielding requirements are not severe.

For improved shielding Effectiveness and environmental protection, these light weight aluminum ventilation panels are available tin plated. However, in applications requiring maximum shielding levels and greater weight support, either steel or brass honeycomb shielded vents are recommended.

OMNI CELL Panels: OMNI CELL ventilating panels are high performance aluminum honeycomb units in Chomerics’ unique configuration. The OMNI CELL configuration eliminates the normal polarized shielding characteristics of conventional aluminum honeycomb, as do brass and steel panels. In place of the single honeycomb, two parallel honeycomb panels, each half the thickness of standard SHIELD CELL honeycomb, are contained in a single frame of standard
thickness.

Foil directions of the two honeycomb layers are at right angles to each other to eliminate non-symmetrical shielding effects. Each honeycomb layer contains 1/8 in. (3.2 mm) cells, 1/4 in. (6.4 mm) thick, for a total thickness of 1/2 in. (12.7 mm). The finished panel assemblies are chromate conversion coated. OMNI CELL construction is usually the best general purpose honeycomb vent. It provides significantly more shielding than conventional SHIELD CELL aluminum honeycomb, at only nominally higher cost
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Slimview

DESCRIPTION:SLIMVENTTM Thin, Lightweight Panels for Air Intake and Exhaust Ports SLIMVENT air ventilation panels provide 90 dB attenuation at 1 MHz to 50 dB at 10 GHz. The panels are made from expanded aluminum or monel (a nickel-copper alloy) foil, secured in an extruded aluminum frame only 0.187 in. (4.75 mm) thick. This narrow profile is ideal for accommodating critical space limitations at air intake and exhaust ports. The frame features an integral wire mesh gasket for EMI shielding at the mounting interface.
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Streamshield

DESCRIPTION:Lightweight design
Economical construction
Excellent shielding performance (>50 dB @ 10 GHz)
Excellent dimensional aspect ratios for airflow
95% open area honeycomb for maximum airflow
Customization
Rapid prototyping

STREAMSHIELD EMI Shielded Vent/Airflow Panels: With their exclusive designs (patent pending) and manufacturing process, Chomerics’ STREAMSHIELD vent panels have been developed as a high performance, economical solution to the EMI and airflow issues in information technology & telecommunications applications. Increased electromagnetic radiation and heat generation, together with intensified regulatory requirements for emissions suppression, necessitate a more sophisticated solution than simple perforations or louvers in electronic enclosures. STREAMSHIELD vent panels deliver EMC and thermal management performance that meets the technology demands of today’s electronic systems, including:

Switches
High speed routers
Test equipment
Cooling fan covers
Indoor cellular base stations
Wireless and wireline infrastructures
Personal computers
Network servers
Network cabinets and enclosures
Access equipment
Rack mounted power amplifiers
Storage cabinets

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VIP

DESCRIPTION:Chomerics’ VIP® (Viscous Impingement) EMI Shielded Air Filters are all metal EMI shielded panels used at the air intake on shielded enclosures which require low-velocity cooling air. Their filtering medium is multi-layer expanded aluminum, which can be coated with viscous oil for dust impingement. VIP filters are specifically designed for applications requiring any of the following:
Maximum dust arrest
Easy removal and reinstallation
Repetitive cleaning of excessive dust deposits
Minimum penetration of the enclosure in restricted space situations.

To withstand severe environments, VIP panel elements are all-aluminum, chromate conversion coated. VIP filters are supplied in customer specified sizes ranging from 2 x 4 in., to 30 x 48 in. (5.1 x 10.2 cm, to 76.2 x 122.0 cm), complete with EMI gasketed, extruded aluminum frame with mounting holes, ready for installation. Integral monel knitted wire mesh gasketing is available. However, although the panel is self gasketing, because the expanded aluminum filter is of greater thickness than the frame into which it is compressed. VIP filters can be cleaned readily in detergent solution and re-oiled with a commercial air filter spray before being remounted

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