Streamshield EMI Shielded Air Vent 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 and 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

The STREAMSHIELD designs provide the same high performance as traditional honeycomb vent panels. Their honeycomb is 95% open area, minimizing pressure drop (Figure 3). The aperture size and cell depth provides the waveguide absorption and cut-off frequencies needed to solve even the most difficult EMI and airflow challenges.

CONSTRUCTION CHOICES

STREAMSHIELD vent panels are produced in two styles. In the first style, the honeycomb is incorporated into a stamped “tray” with integral tangs (fingers) around the periphery. The special mechanical process used to bend the tangs into the honeycomb ensures secure, consistent and reliable honeycomb- frame contact (see photo and Figure 1). This style is offered in two standard configurations that provide a square fan opening, or a round fan opening, as shown in Figure 4. In the second style, the honeycomb is incorporated into a roll-formed frame with a knitted aluminum wire mesh that maximizes contact (minimizes impedance) between the honeycomb and frame. Other construction features include:

• Aluminum alloy 3003 or 5052 framing
• Aluminum alloy 5052 honeycomb, 1/16 (1.6 mm) or 1/8 inch (3.2 mm) cells — 1/8 inch (3.2 mm), 1/4 inch (6.35 mm) or 1/2 inch (12.7 mm) thickness
• 6.1 lb./ft.3 density, 0.0015 inch (0.38 mm) thick foil
• SOFT-SHIELD 5000 EMI Gasket
• Choice of surface finishes

Optional OMNI CELL® honeycomb construction (oriented 90° to counteract polarization effects)

OMNI CELL honeycomb construction provides higher shielding effectiveness than standard honeycomb construction. Contained in the same standard thickness frame, it utilizes two parallel honeycomb panels, each of which is half the thickness of standard honeycomb. Foil directions of the two OMNI CELL layers are at right angles to each other to eliminate the polarized shielding characteristics of conventional honeycomb. Refer to Figure 1.

CUSTOMIZATION OPTIONS

• Alternative honeycomb cell sizes and thicknesses
• Alternative EMI gaskets
• Custom sized frames
• Custom fastener hole patterns
• Chromate conversion coating — clear or yellow, provides corrosion resistance and paintable surface
• Electroless nickel or electrolytic tin plating — enhances EMI shielding and corrosion protection, but chromate conversion coating also required if parts are to be painted
• Conductive paint – alternative to plating
• Intumescent paint – see inset below.
• Foam filters – 30 pore per inch polyether filter foam, UL94 HF1 rated. Other pore densities are available.
• Protective grilles – 0.030 inch (0.76 mm) thick, 0.250 inch (6.35 mm) hex perforated metal with 0.281 inch (7.14 mm) centers, for harsh environments
• Special hardware – for example, selfclinching standoffs or nuts (Figure 1)

Chomerics’ Application Engineering Department is ready to assist you with evaluating cost-effective STREAM SHIELD EMI shielded vent/airflow panels in your design.

Download the Streamshield EMI Shielded Air Vent Pnaels Resources

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This warranty comprises the sole and entire warranty pertaining to items provided hereunder. seller makes no other warranty, guarantee, or representation of any kind whatsoever. All other warranties, including but not limited to, merchant ability and fitness for purpose, whether expressed, implied, or arising by operation of law, trade usage, or course of dealing are hereby disclaimed. Notwithstanding the foregoing, there are no warranties whatsoever on items built or acquired wholly or partially, to buyer’s designs or specifications.

Limitation of remedy: Seller’s Liability arising from or in any way connected with the items sold or this contract shall be limited exclusively to repair or replacement of the items sold or refund of the purchase price paid by buyer, at seller’s sole option. In no event shall seller be liable for any incidental, consequential or special damages of any kind or nature whatsoever, including but not limited to lost profits arising from or in any way connected with this agreement or items sold hereunder, whether alleged to arise from breach of contract, expressed or implied warranty, or in tort, including without limitation, negligence, failure to warn or strict liability.