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John Castle at Nolato PPT

John Castle

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.

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.
EMI vent and removable dustfilter products

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

CATALOGUE

DETAILED INFORMATION

Specifications

Woven Aluminium Screen AMS-4182.

Performance

Frequency  Field Attenuation (db)
10KHz H 42
100KHz H 53
1MHz H 61
1MHz E 92
10MHz E 81
100MHz E 60
1GHz P 52
10GHz P 43

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
VF-Dust Filter AF1 08 = Triple mesh xxxx-xxxx xx C/T = Captive insert

AF2
    T/H = Through hole
  AF3        
  AF4        
  AF5        
  AF6        
  AF7        
  AF8        
  AF9        

Examples / Notes

Example:
VF-AF1-08-2260-4330-12-T/H (4.8) specifies a corrugated three layer aluminium woven mesh dustfilter in an AF1 style frame with 12 through holes of 4.8 mm diameter. The hole positions would be agreed with the customer prior to manufacture or as shown on the customer drawing.
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Material data sheets

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Application notes

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Product catalogues

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