Our EMI Shielded vents with dustfilter assemblies are composites of our EMI Shielded honeycomb attenuated vents and removable dustfilter panels containing a de-membraned polyurethane filter media.
STANDARD PRODUCTS
EMI vent and removable dustfilter
Our EMI Shielded vents with dustfilter assemblies are composites of our EMI Shielded honeycomb attenuated vents and removable dustfilter panels containing a demembraned polyurethane filter media. The attenuated vent is specified in the normal way and contains, within its mounting frame, additional fixings (usually captive threaded inserts) which are used to retain the framed dustfilter element.
The dustfilter can be mounted either side of the honeycomb vent panel and attention should be paid when specifying the type of interface gasket to ensure that, where necessary, it is conductive. The filter material is available with openings of 30 to 60 per inch as standard, but others can be specified, and is secured by a woven mesh kickplate.
The dustfilter can be mounted either side of the honeycomb vent panel and attention should be paid when specifying the type of interface gasket to ensure that, where necessary, it is conductive. The filter material is available with openings of 30 to 60 per inch as standard, but others can be specified, and is secured by a woven mesh kickplate.
Applications
Honeycomb vent and demembraned polyurethane dust filter panels are usually used inside racks and electronic equipment enclosures, in particular where the ingress of dust or foreign matter is likely but the heavier duty woven aluminium mesh is not needed. Dust filters fitted inside the equipment can have quick-release fastenings and do not require an EMI shielded gasket. In applications where the attenuated vent is fixed directly to the enclosure, dustfilters mounted outside the equipment do not need an EMI shielded gasket.
Find more information, such as our standard sizes etc, in our catalogue.
CATALOGUE
Detailed information
Specifications
For EMI shielded gasket material specifications please refer to the conductive knitted mesh, conductively loaded silicone and oriented wires in silicone pages.
Performance
| Frequency | Field | Type VH-01 |
| 10KHz | H | 45 |
| 100KHz | H | 49 |
| 1MHz | H | 51 |
| 1MHz | E | >100 |
| 10MHz | E | >100 |
| 100MHz | E | >100 |
| 1GHz | P | 98 |
| 10GHz | P | 95 |
Tolerances
| Overall dimensions | +/-0.8mm |
| Fixing holes/fasteners | +/-0.5mm |
| with jigs +/-0.2mm |
How to order
Specify: Shielding Series-Frame Style-Vent Media-Overall Size-Number of Fixings-Fixing Type/Size
Where possible please provide a detailed drawing.
| Shielding Series | Frame Style | Vent Media | Overall Size | Fixings (no.) | Fixing Type |
| VB-Composite | AF1 | 09 = | xxxx-xxxx | xx | As specified |
| AF2 | Demembraned | ||||
| AF3 | Polyurethane |
Examples / Notes
Example:
VH-AF1-01-2260-4330-12-T/H (4.8) plus VB-AF1-09-6 specifies an AF1 style honeycomb vent fitted with an AF1 dust-filter using 6 fasteners. It would be normal in such instances for the assembly to be detailed in drawing form indicating the precise mounting method and sequence in relation to the enclosure.
VH-AF1-01-2260-4330-12-T/H (4.8) plus VB-AF1-09-6 specifies an AF1 style honeycomb vent fitted with an AF1 dust-filter using 6 fasteners. It would be normal in such instances for the assembly to be detailed in drawing form indicating the precise mounting method and sequence in relation to the enclosure.
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