Specifications for Refractron Porous Ceramic Filters
Porous ceramic filters are used for:
- Hot gas filtration
- Solids recovery
- Solvent filtration
- Backwash filters
- Pre-coat filters
- Gas filters
- Catalyst recovery
- Pre-coat filters
- Corrosive fluids
Porous ceramic filters are used for solid particulate removal in liquid and gas applications in chemical process, petrochemical, semiconductor, food and beverage, and pharmaceutical markets.
These rugged, specialty, porous ceramic diffusers are manufactured by fusing aluminum oxide grains using a porcelain bond to form a strong, uniformly porous and homogeneous structure. For more corrosive applications, silicon carbide materials are available.
Cartridge: 2-3/8" OD in 10", 20", 30", and 40" lengths
Tubular: 1/2", 3/4", 1 1/2", 2 1/2", 4 1/4"
Diameters up to 48" Long
Plates: 12" Square x 1" Thick, 8" x 12" x up to 1 1/2" Thick
Discs: 2" OD x 1/4" Thick, 4" OD x 1/2" Thick, 7" OD x 1/2" Thick, 9" OD x 3/4" Thick
Other custom shapes available on request.
40-50% (active pores)
Nominal Micron Grades
- Monolith Grades AF 6 microns to AF 90 microns
- Membrane Grades MeAF0.25 microns to MeAF6 microns
- Custom grades available upon request
0.5 to 700 SCFM per square foot of area (gas)
0.1 to 12 GPM per square foot of area (water)
Up to 1400° F for porous ceramic, limited only by sealants, gaskets and/or fitting and housing materials.
Porous ceramics resistant to most acids, except for Hydrofluoric Acid and Phosphoric Acid. In alkaline solutions, porous ceramics are resistant up to pH9. It is also resistant to organic solvents. The sealants, gaskets and/or fitting materials may be the limiting factor in certain fluids.
Porous ceramic is cleanable by a variety of methods, depending on type of contaminant to be removed. Methods include spraying, brushing, backwashing, oven firing, dilute acid cleaning, solvent cleaning, steam cleaning and ultrasonic cleaning.
Flexural Strength (M.O.R.)
Up to 500 psi (outside to inside)
Thermal Expansion (C.T.E.)
7 x 10-6/ °C
The basic tube is open on both (DOE = Double Open End). A 3/4" NPT 316 stainless steel fitting may be used on the 2 3/8" OD tube mounted on the fitting using a tie rod, plate, nut and gasket (Neoprene, Viton, Teflon). Other fittings available on request, including flanges.
Typical part number is AF90, 60-40-250, 31655, Viton
AF or MeAF = Alumina or Membrane
90 = Pore size of 90 microns
60 = OD in mm (2 3/8" OD)
40 = ID in mm (1 3/8" OD)
250 = Length in mm (10" lg)
316SS Viton = 316SS filter w/viton gasket
Contact the factory for additional details and help selecting the required product.
Other Refraction Technologies Corporation Capabilities
Porous ceramics can be used for a variety of applications where a uniform, controlled porosity is required. In addition, the material can withstand high temperature and corrosive applications. Refraction manufactures porous ceramic parts used in diffusers/spargers, ink pads, liquid dispersion rolls, adsorbent filters, dryer cores, plus other engineered components.