<p><span style="font-family: verdana; font-size: 14.4444px; text-align: justify;">Frame is constructed from galvanized steel sheet. Welded joints are   protected by aluminium spray coating.</span></p>
<p><span style="font-family: verdana; font-size: 14.4444px; text-align: justify;">Air operated   damper blades are fixed to the frame by self oiling nylon bushes with 8 mm dia aluminium pipes.</span></p>
<p><span style="font-family: verdana; font-size: 14.4444px; text-align: justify;">Blades are sealed with foam gasket at the bottom to   avoid rattling noise and to provide air tight operation.</span></p>
<p><span style="font-family: verdana; font-size: 14.4444px; text-align: justify;">Blades open full or to any angle depending on the air velocity. Blades stay in position of   opening without fluctuating when there is constant air flow. Blades closes quietly when the air flow   stops.</span></p>
<p><span style="font-family: verdana; font-size: 14.4444px; text-align: justify;">Designed to maintain a constant pressure   level inside pressurized rooms. Used at duct outlets to prevent back draft when air moving devices are   switched off.</span></p>
<p><span style="font-family: verdana; font-size: 14.4444px; text-align: justify;">In a multi fan installation non   return dampers prevent back draft through the operating fans.</span></p>
<p><span style="font-family: verdana; font-size: 14.4444px; text-align: justify;">Structure is available with flanged edges and are supplied un drilled as   standard.</span></p>
<p><span style="font-family: verdana; font-size: 14.4444px; text-align: justify;">Available in square and rectangular   sizes.</span></p>
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<p class="c26 b" style="margin: 0px; padding: 0px; font-weight: bold; &#10;&#10;font-size: 14.4444px;">Other Information</p>
<p><b>Pay Mode Terms:&nbsp;</b>T/T   (Bank Transfer)</p>
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