Cleaning By Flushing; Flow Velocity / Flushing The Liquid End; Selected Cleaning Agents And Parameters - ProMinent Sigma 1 Supplementary Operating Instructions

Notes on cleaning metering pumps with hygienic pump head

8.4 Cleaning by flushing

8.4.1 Flow velocity / Flushing the liquid end

Flow velocity
Flushing the liquid end

8.4.2 Selected cleaning agents and parameters

Tab. 4: Selected cleaning agents and parameters
Cleaning agent
Flushing with cold water
Sodium hydroxide solution NaOH
Hydrogen peroxide (H O
2
used as an intensifier for 1 ... 2%
NaOH
Acidic cleaning agent based on phos‐
phoric acid H PO
3 4
16
Use a suitable flushing medium to flush the pump regularly at
100% delivery stroke in line with your cleaning schedule.
Set up an appropriate flushing assembly to flush the liquid end.
Ensure that the metering pump is operating at 100% delivery
stroke during flushing.
The fundamental prerequisite for a successful CIP (cleaning in
place) process is a turbulent flow at a minimum flow velocity of 1.5
m/s based on the "pipe diameter of the pump feed".
However, never exceed the maximum permitted priming pressure
on the suction side, referring to the "Technical data" chapter of the
"Operating instructions for the diaphragm motor driven dosing
pump Sigma".
Max. chloride con‐
tent in the
batching water in
mg/l
) product
2
WARNING!
Danger from hazardous substances!
Possible consequence: Fatal or very serious inju‐
ries.
Please ensure when handling hazardous sub‐
stances that you have read the latest safety data
sheets provided by the manufacture of the haz‐
ardous substance. The actions required are
described in the safety data sheet. Check the
safety data sheet regularly and replace, if neces‐
sary, as the hazard potential of a substance can be
re-evaluated at any time based on new findings.
The system operator is responsible for ensuring
that these safety data sheets are available and that
they are kept up to date, as well as for producing
an associated hazard assessment for the worksta‐
tions affected.
Concentra‐
tion in %
150 -
150 2 ... 3
150 Injection: 0.1
Batch: 0.5
150 3
Dwell time in Max. tem‐
minutes perature in
°C
- -
30 ... 45 80
30 80
45 70