Depth Filters for Aggressive and High Temperature Fluids
All PTFE construction for compatibility with a wide range of process fluids
Available in retention ratings of 0.5, 1, 3, 10, or 25 microns (μm)
Fits into most standard housings
May be used as a final filter in many applications, or to provide superior protection for membrane final filters
PVDF and PFA housings are available for use in all fluoropolymer filtration systems
M31 or DOE end configurations are available as standard products

Performance Specifications
Filter grades
0.5, 1, 3, 10, 25 μm

Maximum operating temperature
PTFE is compatible with nearly all chemicals up to 185°C (365°F). Primary exceptions are fluorine, chlorine, and oxygen at temperatures in excess of 100°C (212°F).

Applications
Acid etch systems - including Piranha Etch Solvent Strip applications
Most aggressive and/or high temperature acids or solvents

Additional High Temperature Materials
Pall can also supply DFT Classic filter cartridges in polyphenylene sulfide (PPS) for high temperature and aggressive applications. Additional PTFE products are also available, including the Fluoryte™ Series filter cartridge, an all-fluoropolymer membrane cartridge.
Contact your local Pall representative or distributor for specific information on these products.

Recirculating Applications
Retention ratings, by convention, are for single pass applications. Many applications involve recirculating systems, where the filter media has several opportunities to capture contaminant. For example, in a 15.1 liter (4 gallon) system circulating at 7.6 lpm (2 gpm), the fluid passes through the filter cartridge five times in ten minutes. Thus, the effective retention of a filter cartridge is much finer. Specifically, a cartridge rated at 0.5 μm (nominal) on a single pass is often an effective 0.2 μm (nominal) filter on a recirculating basis.