Mechanical Supplies
Sand trap louver
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- Two-stage sand trap louvers with vertical inlet channels and a collection hopper, dropping airborne sand out of the intake stream before it reaches the filter bank. Removal efficiency is quoted by particle size at a stated face velocity.
Application
Standard on fresh air intakes throughout the Gulf, Egypt and North Africa, where a normal weather louver passes enough sand to blind a G4 pre-filter within weeks. Fitting them ahead of the filter bank on AHUs, generator rooms and substation ventilation cuts filter replacement cost and protects coils from the abrasion and fouling that permanently lowers their capacity.
Standards & Reference 4 cited
AMCA 500-L
The laboratory method for testing louvres: pressure drop and water penetration, which decide whether an intake louvre keeps weather out at design airflow.
AMCA 511
The certified ratings programme for air control devices: dampers and louvres carrying a verified rather than a claimed rating.
EN 13030
Rain penetration testing for louvres: how much water gets past at a given face velocity.
ASHRAE 62.1
Ventilation for acceptable indoor air quality: the outdoor air rates a building has to deliver.
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