Nortec DRAABE Pure Water System - Manual (Page 9)

Created: 21.09.2006
Changed: 29.02.2008
Printed: 02.03.2009
page 9 of 59
120 V~/ plug in
power supply
12 V~
ba r ba r
Inlet
(tap-water)
Water
softener
Expansion reservoir
Non-return
valve
Pressure booster
Discharge
120 V ~
Process water
Drain
Pure water
EIN
A US
Safty overflow
Remote fault indicator
Pure water system (PerPur)
120 V ~
Installation rail
Salzverbrauch s-
minim atik (
Optim ie rt e
Re inwa sse ra usbeu te
Sam melstör-
fe rn meldu ng
p at.p en d .)
con cep t
2000 con cep t
2000
Air humidification
3.1.2 Basic System with Pressure Boost
The working pressure of the basic system lies between 2 - 3 bar (29 – 44 psi). If the quan-
tity of pure water produced when the pressure lies in this range is insufficient, it is possible
to add a pressure boost. The pressure boost (DE 3-5) increases working pressure to 3 - 5
bar (44
– 72 psi). This is useful when the consumers are at a distance or require higher in-
put pressure.
The boost in pressure yields system separation between process water and the output of
the pure water system. This is especially important when the pure water is used both for
printing presses and for a DRAABE air humidifier.
The pressure boost forces the pure water into a standing storage tank. There must always
be a non-return valve between the pressure boost and the standing tank so that the water
in the tank cannot be forced back.
This variant is used when the pure water is to be used as process water.
IMPORTANT: Further information on the performance of a pressure boost can be found in
Chapter 4, "Fundamentals of Planning".
Figure 2: PerPur with Pressure Boost