Page 306 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

276 Applied Process Design for Chemical and Petrochemical Plants

Figure 4-69. Pleated radial-fan filter cartridge. Fiitration is from out-
side to inside. Courtesy of Dollinger Corp.

Figure 4-71. Cluster of filter cartridges in a single chamber. Courtesy
of Filterite Corp.

Figure 4- 70. Wound filter tube on stainless steel core. Courtesy of
Filterite Corp.

solids from gases or liquids. Table 4-14 presents represen-
tative physical property and application data for the more
commonly used filter media. These media may be in fila-
ment, fiber, or "felt" form and arranged by weaving tech-
niques lo control the pore or free spaces to specific size
for removal of various sizes of particles. The particle size
retention listed in the table ranges from 0.006 micron to
over 100 micron. A micron is often termed "micrometer"
or a millionth of a meter, using symbol µm.
Filter cartridges as illustrated are considered "throw-
away" and are removed from service when the pressure
drop builds up to a predetermined value, or when the Figure 4-72. Cartridge-type filter-pleated membrane. Courtesy of
effiuent changes color or becomes opaque with suspend- Gelman Instrument Co.