7 The startup/shutdown of a pump
Operating manual mzr-2521 and mzr-2921
Last update: June 2019
Technical data subject to change without prior notice!
47
Nature of the handled liquid
Flushing cycle
[min]
Suitable flushing liquid
1
Oils, fats, plastifiers
15-20
isopropanol, ethanol, acetone, benzine
2
Solvents (polar + nonpolar)
5-10
isopropanol, ethanol
3
Other organic liquids
10-15
isopropanol , ethanol
4
Refrigerating and cooling agents
15-20
isopropanol, ethanol
5
Neutral watery solutions
20-25
isopropanol, ethanol
6
Basic solutions
25-30
DI-water (deionized water)
7
Organic acids
30-40
isopropanol, ethanol
8
Weak mineral acids
25-30
DI- water
9
Strong mineral acids
35-45
DI- water
10
Strong oxidizing liquids
35-45
DI- water
11
Paints, varnishes, adhesives
50-60
Not specified - for further information
please contact HNP Mikrosysteme.
table 26
Selection of the flushing liquid (solvent) and the duration of the flushing cycle depending on the delivered liquid.
Warning
Please make sure that the pump components and particularly O-rings and
sealing are resistant to the employed flushing liquid (see table 27).
Shaft sealing
O-ring material
Flushing liquid
PTFE,
graphite-reinforced
UHMWPE
FPM
EPDM
FFPM
acetone
0
0
3
0
0
benzene
0
3
1
3
0
benzyl alcohol
0
-
0
2
0
benzine
0
0
0
3
0
butanol
0
-
1
0
0
dimethyl sulfoxide (DMSO)
0
0
3
0
0
ethanol
0
0
0
0
0
isopropanol
0
0
0
0
0
methanol
0
0
2
0
0
methylethylketone (MEK)
0
0
3
1
0
oil / fine mechanics oil
0
0
0
3
0
styrene
0
-
1
3
1
toluene
0
1
2
3
0
water
0
0
0
0
0
xylene
0
1
2
3
0
Legend:
0 ... good suitability 1 ... suitability 2 ... conditional suitability 3 ... labile - ... not specified
table 27
Resistance of the sealing materials depending on the flushing liquid (solvent)