Static Removal in a Vertical Flow Cleanbench
The continuous flow of clean, dry, filtered air through the vertical flow hood generates static charges on everything contained within the critical environment. Transfer of clean but charged components from the hood area will promote the attraction of airborne contaminants present within the host cleanroom.
The vertical flow cleanbench is the most common of cleanbenches. It has an upper-mounted fan filter unit (FFU) projecting a full ceiling-area column of laminar-flow air downwards and out of the front of the hood preventing, as with the laminar-flow cleanbench, ingress of contaminants.
This continuous flow of clean, dry, filtered air generates static charges on everything contained within the critical environment. Subsequent removal of any clean but charged components from the hood area will promote the immediate attraction of many localised airborne contaminants present within the host cleanroom, which will be a lower grade environment than the protective hood.
Static Removal in a Vertical Flow Cleanbench - Select a problem:
Placing a 3850 Ionstorm or 3024L Static Eliminator approximately 200 mm from the back of the hood and across the full width (usually 1100 mm), the laminar-flow air that bathes and keeps the working area clean will be fully ionised. This will neutralise the working zone and product.
Where contaminated components are introduced into a cleanbench hood, the 4125 Ionised Air Gun can be used to remove particles retained by electrostatic attraction.
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