Manually Cleaning The Valves - ProMinent Sigma 1 Supplementary Operating Instructions

8.5 Manually cleaning the valves

Notes on cleaning metering pumps with hygienic pump head
You can clean the pump in its dismantled state. You need to dis‐
mantle the liquid end and clean it wet.
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.
Components can fall out of the valves, such as balls and valve
n
seats Fig. 5, especially out of the discharge valve, and become
damaged, making them unsuitable for hygienic use.
Replace any components that fall out.
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Carefully open the large single-hinge clamps and pay attention
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to the components.
Only tighten the single-hinge clamps by hand. Do not use any tools
or extensions.
Pay attention to the direction of flow. The direction of flow is indi‐
cated by the arrows on the dosing head and valve housing. The
pump will not pump if assembled incorrectly.
The O-rings need to lie deeply in their groove, as the O-rings could
otherwise fall out and the pump then run incorrectly.
1
2
3
4
5
6
7
Fig. 5: Cross-section: Sigma Hygiene liquid end
1 O-ring
2 Connector piece
3 Valve housing
4 Ball
B1285_3
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