Nortec DRAABE Pure Water System - Manual (Page 15)

Created: 21.09.2006
Changed: 29.02.2008
Printed: 02.03.2009
page 15 of 59
3.2.3 Functional Description: Clear Water Systems (PerPur)
The Pure Water System PerPur is the heart of the water treatment system. The pure water
system works by the principle of reverse osmosis and desalinates the water which has just
been softened. Its output is the desalinated product (95-99% desalinated), the so called
pure water permeate. This pure water can be used as is for an air humidification system or
else mixed with an additive that renders it suitable for use by printing presses.
The systems are equipped with comprehensive hygiene functions. The DRAABE BioSafe
System ensures hygienically faultless operation. The demanding hygienic requirements
placed on a pure water system are of especially great importance when the water being pu-
rified is destined for an air humidification system.
3.2.3.1 Service Recommendation
Regular maintenance, in addition to the Pure Water System's good concept, is of great im-
portance for undisrupted operation which adheres to a high standard of hygiene.
Many Professional Associations advocates regular maintenance and service. DRAABE
company agree that in view of the considerations given below, reverse osmosis systems
must be serviced regularly.
Reverse osmosis systems work with a separating membrane. The undesirable substances
in the water precipitate there and are conducted to the drain. The product (pure water)
reaches the exit from the separating membrane. A separating membrane's operating prop-
erties change through erosion and deposits (minerals, iron). Consequently, each separating
membrane must be cleansed thoroughly after several months of operation.
With the patented DRAABE Container System this servicing procedure is easy, low cost
and can be carried out without downtime in the customer's operations. Under the rental
contract the customer automatically receives an exchange container every 6 to 8 months.
The used container is sent back to the producer, where it is serviced. There the membrane
is cleansed as required and always disinfected. Its operating data are checked and opti-
mised. This service operation including disinfection is confirmed in the BG Service Book.
3.2.3.2 Certificate of Hygiene
The DRAABE Pure Water Systems are examined microbiologically for their hygiene by
Fresenius Institute, which is an independent institute. The examinations are carried out at
regular intervals and take place under test conditions which correspond to reality. Our sys-
tems completely fulfil the requirements set by the Institute and the Professional Association
for Printing and Paper Processing, which is located in Germany, Wiesbaden. Our systems
work faultlessly in respect to hygiene. In an annex (section 9.3) you will find the Test Cer-
tificate issued by the Fresenius Institute.