(13) Facet HP Series single-stage water coalescers, commonly referred to as repack or hay pack housings, are horizontal, cylindrically shaped housings designed to protect filtration systems from gross amounts of water and solid contaminants. Facet recommends using their wafer style repack coalescers since they allow the first two sections to be replaced when required. The third and successive sections require fewer changeouts since they may remain relatively free of solids.
Coalescing first starts as the product enters the vessel. Due to the substantially reduced velocity, free water will fall out by gravity. While the product progresses through the mass packed media, further coalescing occurs by impingement of water droplets on the media. At ...
Facet wafer repacks, used with Facet HP Series single-stage coalescer housings, are excellent coalescers or strainers for fuel applications when gross solids (in excess of 0.5 ppm) and heavy water contamination conditions exist.
Heavy solids or certain types of solids tend to either blind off the surface of the repack media and/or compress only the first and second wafers to the point that they will no longer function as a coalescer. With Facet wafer repacks, only the first two wafers need to be replaced when required while the third and successive downstream wafers require fewer changeouts since they generally remain relatively free of solids.
In constructing wafer repacks Facet controls the media density by machine packing the ...
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