ProMinent Sigma 1 Supplementary Operating Instructions page 18

Notes on cleaning metering pumps with hygienic pump head
8.4.4.1 Max. flushing medium temperature
Tab. 5: Max temperature for 15 minutes and 3 bar
Parameter
Flushing medium
The dosing head assumes the temperature of the liquid medium after a short time. The dosing head is then
hot. Put in place appropriate protective measures.
8.4.4.2 Drainage of residual liquid / Self-draining
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Only use cleaning agents that do not attack or grind the materials
of the pump.
Make sure that all surfaces, especially any surfaces that come into
contact with food products, are not scratched by tools, cleaning
agents, auxiliary agents etc., and that these surfaces are not
changed in any other way.
You can clean the pump in its installed state together with its
respective pipework.
The required reaction times, temperatures and cleaning agent con‐
centrations are dependent on the level of dirt and contamination,
and need to be adapted individually.
Values
+ 140 °C
Metering pumps with hygienic pump head are fitted with tightly
closing ball check valves. Flushing liquid can therefore collect in
the pump cavity and above the valves after the CIP (cleaning in
place) step. Use appropriate processes, e.g. purging, to remove
this flushing liquid.
If you wish to completely remove the residual liquid, then you need
to dismantle the hygienic head, dry all components, and then re-
assemble the hygienic head,