Bed Grading – AFS Series
UNICAT AFS (Advanced Filtration System) represents the most advanced and comprehensive pressure drop mitigation technology available to the refining and chemical industries. The AFS product line represents the broadest range of filter sizes and meshes available to meet the most severe and challenging operations in the field. From operations dealing with ultra small size fines of 5 microns to large size iron scales exceeding 2500 microns, there is an AFS product designed to handle each specific service.
UNICAT’s AFS product line in combination with UNICAT’s CGS active ring technology provides the perfect combination of products to any industrial user in order to optimize and enhance their existing grading solutions. Units that currently use standard grading types such as ceramic balls, wagon wheels, layered rings, larger quadralobes or optimized grading like CAT TRAP, are especially well served to consider the AFS product line to maximize bed performance.
UNICAT AFS Series is a licensed technology.
AFS’s high radial and axial strength is well suited for high pressure applications such as CFH, GOHT and HCU reactors as well as less severe applications such as NHT and DHT. The four AFS mesh sizes; 10, 25, 50 & 60.
AFS’s high radial and axial strength is well suited for high pressure applications such as CFH, GOHT and HCU reactors as well as less severe applications such as NHT and DHT. The mini size AFS are for physical size transitioning between grading layers and small diameter (< 6 ft.) reactors. The three AFS mesh sizes; 10, 25, & 60.
the AFS 7600 series are the same uniquely shaped, filtration grading disks promoted with NiMo for de-nitrification. The three AFS mesh sizes; 10, 25, & 50 (the 7600 series AFS products, the mini size also has a significantly higher surface area due to the difference in manufacturing techniques for the standard and mini sizes).
the AFS 7500 series are the same uniquely shaped, filtration grading disks promoted with CoMo for dehydrogenation. The three AFS mesh sizes; 10, 25, & 50 (the 7500 series AFS products, the mini size also has a significantly higher surface area due to the difference in manufacturing techniques for the standard and mini sizes).
are the double-calcined version, for very high pressure applications, of Unicat’s uniquely shaped, HA (High Alumina) Series, filtration grading disks. The three AFS mesh sizes; 10, 25 and 50; sizes respectively offer a nominal 100, 200 and 400 triangles per square inch or a nominal 250, 500 and 1,000 triangles per disk.
-is a dual purpose; pressure drop mitigation and silica trap; filter grading disk. The AFS-ST series is specifically manufactured to have the active surface area necessary to trap silica particles. AFS-ST is available only in one disk size with three different mesh sizes; 10, 25, 60. The 60 mesh size effectively filters iron sulfide, coker and solid silica fines
G6 is a uniquely shaped, ultra high void space, high alumina, inert filtration grading disk. The AFS-G6HD version also functions as a heavy hold down material. The 6 mesh size AFS provides a nominal 36 triangles per square inch and effectively filters particles ranging in size from 800 to 3,500 microns.
AFS-UM Series is an “Ultra-Mini” size version of Unicat’s AFS HA series. The primary purpose of AFS-UM is to provide physical size grading transition between a layer of mini size of AFS grading disks and a layer of grading rings. Additionally, AFS-UM provides filtration of sub-800 micron particulates and flow redistribution to the lower layers. AFS-UM has a nominal 100 triangles per disk and effectively filters carbon and other medium size fines