Grundfos DDI 209, Инструкция по установке и эксплуатации

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English (GB)
11
1.3.10 Dosing medium
The dosing medium must have the following basic
characteristics:
•
liquid
• non-abrasive
• non-inflammable.
For degassing dosing media, note the following:
•
The DDI 209 without Plus
3
system can be used in
flooded suction for moderately degassing media
such as chlorine bleaching agents.
See section
5. Installation .
• The DDI 209 with Plus
3
system can be used for
moderately degassing media such as chlorine
bleaching agents. Using the DDI 5.5-10 with
Plus
3
system at a maximum system pressure of
3 bar, H
2
O
2
up to a maximum of 31 % can be
dosed. No flooded suction!
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!
Caution
In the event of questions regarding the
material resistance and suitability of
the pump for specific dosing media,
please contact Grundfos.
Pump type
Maximum viscosity*
Normal
operation
Slow-mode
operation
Normal operation
with Plus
3
system
Slow-mode operation
with Plus
3
system
[mPa s] [mPa s] [mPa s] [mPa s]
DDI 0.4-10 -
DDI 2.5-10
200 200 200 200
DDI 5.5-10 100 200 100 200
DDI 13.8-4 -
DDI 20-3
100 200 — —
Pump type HV variant
DDI 0.4-10 500 1000 500 500
DDI 2.2-16 -
DDI 2.5-10
200 1000 — —
DDI 5.5-10 -
DDI 20-3
200 500 — —