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The Ster-O-Tap water sterilization cartridge
consists of a bundle of hydrophillic (water loving) capillary membranes. These
membranes are shaped like hollow fibers, closed on the feed side. The water
follows a path from the large pores on the outside wall to the small pores on
the inside wall. The inside wall of each fiber has very tiny pores - 0.15
microns in diameter (0.00015 mm). These pores are several times smaller than the
smallest bacteria, which is about 0.4 microns in diameter. When water flows
through these pores, an unparalleled removal of >99.999999% (8 log) of all
bacteria is achieved. This prevents harmful bacteria and cysts (like e-coli,
crypto and giardia) from reaching your faucet and provides you the protection
you need.
The patented Ster-O-Tap low pressure membrane
technology achieves this remarkable micro filtration with extremely high flow
rates at low feed pressure. There is very little pressure drop as with other
technologies, such as ceramic. It requires less than 14 psi for a 1 gpm flow.
Ster-O-Tap capillary membrane cartridges have
been tested and certified by the NSF International against ANSI/NSF Standard 42
for Particle Reduction (Class 1) and ANSI/NSF Standard 53 for Cyst and Turbidity
reduction.
Ster-O-Tap® Membrane Features
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o |
Capillary membrane with
asymmetric micro-porous structure, internally skinned |
| o |
Very high flow rates at low
pressure gradients |
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Narrow consistent pore size
ranges
- micro filtration 0.15 micron |
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High surface porosity and
overall porosity (> 85%) |
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Permanently hydrophilic with
neutral surface charge for low fouling characteristics. |
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Withstand feed- and backwash
pressures up to 7 Bar - > 105 PSI |
| o |
Chemical resistant to allow
for a wide range of cleaning agents, incl. chlorine |
| o |
Heat resistant up to 120
oC (248 oF) |
 
A Ster-O-Tap®
Micro (MF) filtration cartridge is composed of a bundle of many capillary
membranes, which are sealed in a housing, with the membranes closed on the feed
side. The feed water follows a path from the large pores on the outside wall to
the small pores on the inside wall for high flow rates at low pressure (US
Patent: 5.895.573 - European Patent: 97942301.9)
Electron Microscope photos of
Ster-O-Tap®
capillary membrane
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Cross section
capillary membrane (156x)
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Outside wall capillary
membrane (5000x)
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| $129.99
with FREE
shipping in the contiguous U.S.!
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