High Temperature Filter Media Choices
Aramid (Nomex®)
Normal maximum continuous operating temperature is 375°F. General applications for Aramid felt include: Highly abrasive dust applications, Electric arc furnaces, High temperature dryers, Cupolas, and chemical applications where high temperatures exist. Aramid offers a good resistance to alkalies under most condition. Most mineral oxides cause degradation and partial decomposition. Aramid withstands common organic solvents very well. Some phenolic compounds cause solubility.
Fiberglass
Normal continuous operating temperature is 500°F. General applications include: Cement kilns, High temperature dryers, Carbon black reactors, Power plants, and Electric furnaces. Fiberglass has excellent resistance to most acids, but is attacked by hydrofluoric acid. Not recommended where bases and salts such as chlorides, bromides, and cyanides are present. This media has poor flex abrasion qualities and requires a 20 vertical wire minimum support cage when used in tubular bag form.
P84® (Polyimide)
Normal maximum continuous operating temperature is 500°F. Common applications for this felt include: smelters, dryers, coal-fired boilers, incinerators, kilns, and calciners. P-84 is nonflammable and not hydroscopic. This felt offers extended bag life in low pH applications and helps reduce differential pressure across the baghouse. The felt operates well in high temperature applications, against acid attacks and is resistant to flex abrasion. Alkaline should be avoided at high temperatures when using this media.
PPS (Polyphenylene Sulfide)
(Commonly known brands: Ryton® or Procon®) Normal maximum continuous operating temperature is 375°F. Common applications include: Coal-fired boilers, Incinerators, Fluidized bed systems, cement mills, oil and gas firings, asphalt plants and Pulverized coal injection systems. Ryton® has excellent resistance to both acids and alkalis. The media also has the ability to operate effectively on applications with O₂ content up to 9%. Ryton® works well in high moisture content applications and where dew point crossings are common. This media is suited for applications where emissions standards are tight.
Teflon® (Fluorocarbon fiber)
Normal maximum continuous operating temperature is 500°F. Generally used for severe chemical environments at high temperatures. Common applications include coal-fired power plants, cement production, and steel foundries. Chemical resistance is excellent and abrasion resistance is generally superior to protein fibers, but not as good as most synthetics. Teflon® has an extreme high cost and is typically used after everything else has failed. Teflon® is available in both a woven and a felt finished product. . This media has poor flex abrasion qualities and requires a 20 vertical wire minimum support cage when used in tubular bag form.
High Efficiency Felts (SlyHE)
Do you need a more efficient filter bag, but don’t want to pay the extreme cost of a PTFE membrane filter? SlyHe felts use micro pore sized fibers to filter fine pollutants. Microfibers are a great solution to fine, uniform, free-flowing dust and fine solids in liquid process slurries. Click here for more information…