Data sheet
Energy Recovery Device / iSave 21-40
6
521B1116 / DKCFN.PD.003.A4.02 / 01.2012
6.
Noise level
5.
Temperature and
corrosion
The noise levels for the iSaves are measured at
rated speed, 60 bar, and a booster pressure of
3 bar.
Since the iSave is mounted on a bell housing and
electric motor, the noise level can only be
determined for the complete unit (system).
It is therefore important that the iSave unit is
mounted correctly on a frame with dampers to
minimize vibrations and noise. It is also strongly
recommended to use high-pressure flexible
hoses between the hard piping in the RO-plant
and the iSave or to use multiple connections with
Victaulic clamps.
The noise level is influenced by:
• Pressure. Higher pressure causes higher noise
level.
• The speed of the iSave. High speed creates
more noise than low rpm.
•
Rigid mounting of the iSave generates more
noise than flexible mounting.
•
Pipe mounting direct to the iSave increases
the noise level compared to flexible hoses.
Fluid temperature:
+2°C to +40°C (+35.6°F to 104°F) - dependent on the NaCI concentration
Ambient temperature:
+2°C to +50°C (+35.6°F to 122°F)
5.1 Operation
The chart below illustrates the corrosive
resistance of different types of stainless steel
related to NaCl concentration and temperature.
All critical parts of the iSave is made of super-
duplex 1.4410/UN S32750 or the like.
Always flush the iSave with fresh water at
operation stop in order to minimize the risk of
crevice corrosion.
316L
Super Duplex
80 º
C
70
60
50
40
30
20
100
160
1600
1000
16000
10 000
160000
100 000
CI -
ppm
NaCI
ppm
Duplex
Storage temperature:
-40°C to +70°C (-40°F to 158°F) – provided that
the pump is drained of fluid and stored
”plugged”.
Frost protection is required at temperatures
below 2°C. Danfoss recommends to use DOW-
FROST from DOW Chemical Company or Chillsafe
mono propylene glycol from Arco Chemical
Company.
7.
Filtration
It is important that the incoming water is filtered
properly to ensure optimum service life. A true
graded density melt-blown depth filter cartridge
rated at 3 μm is therefore recommended.
As the various filters on the market differ greatly,
Danfoss RO Solutions recommends using
cartridges with consistent, reliable performance
and high efficiency and where fibres are blown
continuously onto a central support core.
Danfoss RO Solutions does not recommend
cartridges requiring any type of binders or resins.
Filters can be purchased from Danfoss RO
Solutions. Please see section 10.0, “RO systems
with an iSave”, for installation of filter. For more
information on the importance of proper
filtration, please consult our publication
“Filtration” (code number 521B1009), which also
will provide you with an explanation of filtration
definitions and a guidance on how to select the
right filter.
System pressure
30
60
80
RPM
dB(A)
dB(A)
dB(A)
800
83
83
85
1000
82
85
87
1200
82
88
89
Summary of Contents for iSave 21
Page 5: ...User manual iSave 21 5 180R9221 521B1174 DKCFN PS 003 A1 02 1 CE Declaration of conformity...
Page 32: ...User manual iSave 21 32 180R9221 521B1174 DKCFN PS 003 A1 02...
Page 38: ...User manual iSave 21 38 180R9221 521B1174 DKCFN PS 003 A1 02...
Page 43: ...User manual iSave 21 43 180R9221 521B1174 DKCFN PS 003 A1 02 10 3 Data sheet...
Page 44: ...User manual iSave 21 44 180R9221 521B1174 DKCFN PS 003 A1 02...
Page 58: ...User manual iSave 21 58 180R9221 521B1174 DKCFN PS 003 A1 02...
Page 59: ...User manual iSave 21 59 180R9221 521B1174 DKCFN PS 003 A1 02 10 4 iSave part list...
Page 60: ...User manual iSave 21 60 180R9221 521B1174 DKCFN PS 003 A1 02...
Page 61: ...isave danfoss com iSave 21 Parts list 180R9209 DKCFN PC 003 A2 02 Parts list...
Page 66: ...Parts list iSave 21 Parts list 6 180R9209 DKCFN PC 003 A2 02 03 2011 Exploded view Vane pump...
Page 68: ...Parts list iSave 21 Parts list 8 180R9209 DKCFN PC 003 A2 02 03 2011 Exploded view iSave...
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Page 71: ...User manual iSave 21 71 180R9221 521B1174 DKCFN PS 003 A1 02 10 5 iSave overload protection...
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