9.2 Dosing medium
Dosing medium characteristics
The dosing medium must have the following basic characteristics:
•
liquid
•
non-flammable.
For pumps with integral relief valve, the dosing medium must have the following characteristics in
addition:
•
non-crystallizing.
Make sure the dosing medium is not freezing or boiling at operation conditions.
In case of questions regarding the material resistance and suitability of the pump for a specific
dosing medium, contact Grundfos.
Medium temperature for pumps with PVC dosing head
Maximum counterpressure
Medium temperature
Up to 12 bar
0-40 °C
Up to 16 bar
0-20 °C
Medium temperature for pumps with stainless-steel dosing head
Maximum counterpressure
Medium temperature
Up to 16 bar
-10 to +70 °C
For SIP or CIP applications (up to 2 bar, maximum 15 minutes)
up to 145 °C
Medium temperature for pumps with PP dosing head
Maximum counterpressure
Medium temperature
Up to 10 bar
0-40 °C
Medium temperature for pumps with PVDF dosing head
Maximum counterpressure
Medium temperature
Up to 9 bar
-10 to +70 °C
Up to 10 bar
-10 to +60 °C
Up to 16 bar
-10 to +20 °C
Maximum viscosity
The values apply to dosing media with the following characteristics:
•
Newtonian liquid
•
non-degassing and non-abrasive liquid.
Parameter
Value
Maximum viscosity
100-400 mPa s (depending on the pump type)
Related information
• 9.3.4 Suction lift
• https://en.wikipedia.org/wiki/Newtonian_fluid
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