8 Startup/shutdown of a mzr-pump
Operating manual mzr-7240
Last update: March 2019
Technical data subject to change without prior notice!
47
Nature of the delivered liquid
Flushing time [min]
Suitable flushing liquid
1
Oils, fats, plastifierss
15-20
isopropanol, ethanol, acetone,
benzine/petroleum ether
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 water/y 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 28
Selection of the flushing liquid (solvent) and the duration of the flushing procedure 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 29).
Shaft sealing
O-ring material
Flushing liquid
PTFE (Teflon
®
),
graphite-
reinforced
UHMWPE
FPM
(Viton
®
)
EPDM
FFPM
acetone
0
0
3
0
0
benzene
0
3
1
3
0
benzyl alcohol
0
-
0
2
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
styrene
0
-
1
3
1
toluene
0
1
2
3
0
water
0
0
0
0
0
xylene
0
1
2
3
0
benzine/petroleum ether
0
0
0
3
0
oil / fine mechanics oil
0
0
0
3
0
Legend:
0 ... good suitability 1 ... suitability 2 ... conditional suitability 3 ... labile - ... not specified
table 29
Resistance of the sealing materials depending on the flushing liquid (solvent)
8.4
Shutdown of the micro annular gear pump
In order to shut down a mzr-pump the following steps should be followed:
−
Flush the pump with a filtered and particle-free flushing liquid (solvent) as
described in the chapter 8.3.