Acoustic Louvres - WLA Series

Features
  • The use of acoustic louvres or control of plant noise to atmosphere is now a widely accepted practice.
  • AMS developed a compact louvre, which ensures weather protection with significant acoustic performance and pleasing visual aspect.
  • AMS acoustic louvres are supplied in galvanised or aluminium finishes.
  • Plastic coatings, anodised aluminium or special paint finishes are available on request.
  • Common applications for acoustic louvres are plant room air intakes and exhausts, cooling towers, refrigeration equipment, diesel generators, air cooled condensers and screen wall applications.
  • To compliment the WLA acoustic louvres series AMS can provide matching profile standard weather louvres, these being designed type WL or for blanked off sections type WLD.
  • All being available in the same finish options as for the WLA type acoustic louvres.

Acoustic Performance
  • The acoustic performance table for WLA acoustic louvres is presented as a sound reduction index (transmission loss).
  • In most practical applications the figures shown can be considered in the same way as the static insertion loss for an attenuator.

Construction
  • Louvre blade elements are manufactured from min.0.9 mm high quality galvanised sheet steel for the upper weather surface, acoustic infill being 47.5 kg/m density lass fibre with bonded surface membrane, retained by louvre blade under surface of steel wire mesh.
  • The louvre blade elements are mounted in a 1.6 mm galvanised sheet steel peripheral channel framework with returned edges for unit strength and rigidity.
  • Louvre additional options are bird mesh wire, internal or external flange frame, multi-section construction or architrave strip.

Dimensions
 
Height Width,mm
mm 600 750 900 1050 1200 1350 1500 1650 1800 1950 2100 2250 2400
600 18 23 28 31 37 43 48 55 59 68 83 96 107
750 23 31 37 44 52 57 64 75 82 92 104 116 128
900 30 38 45 53 63 69 79 87 95 108 118 126 140
1050 37 45 52 61 68 77 85 97 106 116 129 143 150
1200 43 52 60 67 75 85 94 107 113 130 145 150 157
1350 49 60 66 74 83 93 104 110 130 148 153 159 174
1500 60 66 75 81 94 102 110 133 146 152 160 175 181
1650 65 75 81 94 100 109 131 144 151 159 175 188 206
1800 70 81 92 101 108 129 143 150 156 178 191 208 228
1950 78 92 103 110 128 145 157 164 180 199 208 224 241
2100 86 103 111 130 140 153 161 174 190 209 225 240 258
2250 94 110 126 140 149 157 169 188 205 222 239 258 274
2400 101 124 137 148 156 166 184 200 219 236 252 269 286
 

Sound Data
Acoustic Performance as tested by CSIR
  Static Insertion Loss, dB
  Octave Band Centre Frequency (Hz)
Model 63 125 250 500 1k 2k 4k 8k
WLA -5 -5 -7 -11 -17 -20 -16 -14
 

Pressure Drop Graph

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