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Standard products

EMI shielded dust filters

Our EMI shielded dust filters offer the benefits of an attenuation vent panel with the properties of a dust filter in a single frame.

EMI vent and removable dustfilter products

Our EMI shielded dust filters offer the benefits of an attenuation vent panel with the properties of a dust filter in a single frame, saving space over our EMI shielded vents with removable dust filters which utilize separate units fixed together in-situ.

Standard frame styles are AF1 to AF4 & AF6 to AF8 and they incorporate a triple layer of woven and corrugated aluminium mesh. Each layer has a slightly different degree of corrugation and so provides separation and increased airflow potential. To enable it to perform its dual function the aluminium dust filter material is relatively dense and so requires an assisted airflow to operate correctly. A ‘kick plate’ is built into the unit to protect the filter from damage.

Our lightweight aluminium honeycomb attenuated ventilation panels are available with a choice of 13 standard aluminium frame extrusions. These EMI shielded vents are designed for use in racks and other forms of commercial enclosure.

Applications

Aluminium mesh dust filters are mounted in the same manner as our EMI shielded aluminium honeycomb vents and are used in industrial or military environments where a ‘heavy duty’ attenuating dust filter is required and a lighter weight de-membraned polyurethane as used in EMI shielded vents with removable dustfilters is not suitable. They are not designed for pure convection and need a driven airflow. They may be solvent cleaned after removal but particular attention should be paid to the replacement of gaskets which could be affected by compression-set or hydrocarbon/solvent contamination.

EMI vent and removable dustfilter products

Catalogue

Find more information, such as our standard sizes etc, in our catalogue.

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Detailed information

Specifications

For gasket material specifications please refer to the knitted mesh gaskets, conductively loaded silicone and oriented wires in silicone pages.

Performance

Frequency Field Type VT (a) Type VT (b1) Type VT (b2)
10KHz H 25 10 10
100KHZ H 45 25 18
1MHz H 58 35 36
1MHz E  >100 93 >100
10MHz E  >100 95 >100
100MHz E  >100 97 95
1GHz P 73 54 45
10GHz P 54 18 18

Note:

VT(A) media is expanded aluminium mesh

VT(B1) media is woven aluminium 0.5mm @ 16 OPI (openings per inch)

VT(B2) media is expanded Monel mesh 0.5mm @ 12 OPI

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 0f Fixings-Fixing Type/Size

Where possible please provide a detailed drawing.

Shielding Series Frame Style Vent Media Overall Size Fixings (no.) Fixing Type
VT (a) TV1 05 = Expanded Aluminium xxxx-xxxx xx xx
VT (b) TV2 06 = Woven Aluminium      
  TV3 07 = Expanded Monel      

Example - Notes

Example:

VT(A)-TV2-05-2320-2320-12-T/H(M4) specifies a thin vent utilising expanded and crimped aluminium alloy media within a TV2 frame with 12 size M4 through fixing holes. The gasket should be specified as shown in the gasket materials sections of the website & catalogue.

Can't see what you're looking for?

Many of our clients require bespoke made products. If you'd like to discuss a product, please do give us a call and speak to us about your requirements.

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