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Materials of Construction
Most of the filter cartridges we offer are made from one of the
following materials, listed in order of most common to least common.
The most common material of construction for our filter cartridges,
polypropylene offers a broad fluid compatibility, can be used at
relatively high temperatures and satisfy various FDA regulations
related to food, beverage and pharmaceutical processes. Not
all "polypropylene" cartridges are the same, the manufacturing
technique and the design of the cartridge directly affect the
particle loading and differential pressure for a given flow rate.
The LOFTREX filter cartridges are made with a melt blown process to
provide varying densities for increased particle retention whereas
other versions utilize multiple layers material to increase
retention capacity. The LOFPLEAT design combines multiple
pleated layers to increase available surface area.
polyethersulfone (PES) membrane
This is the material
used for our membrane filter cartridges, the manufacturing technique
enables increased surface area. The PES used for the
filter cartridges satisfies relevant FDA specifications and these
are commonly used for beverage and pharmaceutical applications.
expanded PTFE membrane
LOFMEM-T cartridges are made
of this material, the physical characteristics are similar to
PES, although the compatibility of PTFE enables LOFMEM-T
cartridges to be used for strong acids and bases, aggressive
chemicals, solvents and hot DI water.
Polyester and Porous Titanium. These are specialized materials for handling
viscous fluids (LOFCLEAN)
and very aggressive or hot fluids (LOFMET).