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1.3.9 Ambient and operating conditions
• Permissible ambient temperature: 0 °C to +40 °C.
• Permissible storage temperature: -10 °C to +50 °C.
• Permissible air humidity: max. relative humidity:
92 % (non-condensing).
1.3.10 Dosing medium
The dosing medium must have the following basic characteristics:
• liquid
• non-abrasive
• non-inflammable.
Maximum permissible viscosity at operating temperature*
* The stated values are approximate values and apply to
Newtonian liquids.
Note that the viscosity increases with decreasing temperature!
Permissible media temperature
* A temperature of 120 °C at a counter-pressure of max. 2 bar is
permitted for a short period (15 minutes).
** At 70 °C, the maximum counter-pressure is 3 bar.
1.4 Applications
1.4.1 Appropriate, acceptable and correct usage
The DDI 222 pump is suitable for liquid, non-abrasive and
non-inflammable media strictly in accordance with the
instructions in this manual.
Warning
The DDI 222 is NOT approved for operation in
potentially explosive areas!
The installation site must be under cover!
Ensure that the enclosure class of motor and pump is
not affected by the atmospheric conditions.
Pumps with electronics are only suitable for indoor
use! Do not install outdoors!
Warning
The pump must be equipped with a diaphragm
leakage detection when used for crystallising media.
In the event of questions regarding the material
resistance and suitability of the pump for specific
dosing media, please contact Grundfos Water
Treatment.
Pump type
Maximum viscosity*
Normal
operation
Slow-mode-1
operation
Slow-mode-2
operation
[mPa s] [mPa s] [mPa s]
Standard
DDI 60-10 100 200 500
DDI 150-4 100 200 500
Standard with Flow Monitor
DDI 60-10 70 100 200
DDI 150-4 50 100 200
HV variant with/without Flow Monitor
DDI 60-10 1200 2000 3000
DDI 150-4 700 1200 1800
Dosing head
material
Min. media
temperature
Max. media
temperature
p < 10 bar
[°C] [°C]
PVC 0 40
Stainless steel,
DIN 1.4571*
-10 70
PP 0 40
PVDF** -10 60*
Warning
Observe the chemical manufacturer's safety
instructions when handling chemicals!
The dosing medium must be in liquid form!
Observe the freezing and boiling points of the dosing
medium!
The resistance of the parts that come into contact
with the media depends on the media, media
temperature and operating pressure. Ensure that
parts in contact with the media are chemically
resistant to the dosing medium under operating
conditions!
Make sure that the pump is suitable for the actual
dosing medium!
Warning
Other applications or the operation of pumps in
ambient and operating conditions, which are not
approved, are considered improper and are not
permitted. Grundfos accepts no liability for any
damage resulting from incorrect use.
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