Wiegandt GmbH
Wiegandt GmbH
Wiegandt GmbH
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24<br />
Aquarium Technology and Accessories<br />
hw ®<br />
-Standard-Filter for hw ® -reverse-osmosis-units<br />
hw ® -pre-filter (5μ)<br />
hw ® -pre-filter (5μ)<br />
The hw ® -pre-filter is the standard pre-filter for the hw-reverse-osmosis systems. It<br />
consists of a special composite material designed specifically use in membrane technology.<br />
Users are urgently advised not to work with other<br />
filter media since these materials always lose particles that<br />
become stuck on the membrane surface and subsequently<br />
may lead to a significant and permanent reduction in performance.<br />
With W a max. mesh size of 5μ, it protects the membrane<br />
from the finest particles, sediments, and deposits found in<br />
tap water. These particles would otherwise destroy the fine<br />
structures of the membrane surface in a very short time and<br />
thereby render the membrane useless<br />
.<br />
The hw ® -pre-filter should be changed every 12 months to ensure optimal water flow<br />
as well as pressure on the membrane surface.<br />
Item no. Description<br />
hw-019010 hw ® -pre-filter (5μ)<br />
hw ® -activated-carbon-filter<br />
hw ® -activated-carbon-filter (active charcoal)<br />
The hw ® -activated-carbon-filter is installed in all hw-reverse-osmosis systems.<br />
Depending on the application scope of the hw-reverse-osmosis systems and the respective<br />
standards, of the water utilities, it carries out various<br />
tasks. Since the hw-polyvinyl-membrane can withstand<br />
chlorine concentrations up to 1 mg/l, this filter is usually<br />
connected to the permeate outlet of the reverse osmosis<br />
unit as the last stage to optimize the quality of the permeate.<br />
In geographic areas where the drinking water suppliers<br />
use so-called shot chlorination (southern Europe, Spain,<br />
Greece, etc.), the hw®-activated-carbon filter is installed<br />
between the hw®-micro-filter and the membrane module.<br />
Shot chlorination can result in chlorine concentrations in<br />
excess of 10 mg/l, which causes permanent damage even<br />
to the hw ® -Polyvinyl-Membrane.Der hw ® -activated-carbon filter should be replaced<br />
at least every 6 to 8 weeks depending on the removed water volume. After this<br />
duration, it is possible that the activated charcoal is permeated by bacteria, which<br />
would result in diminished water quality.<br />
Item no. Description<br />
hw-019020 hw-activated-carbon-filter (active charcoal)
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