4. Shorten the return line so that it is not immersed in the feed chem‐
ical in the storage tank.
Fig. 12: SEK liquid end
1 Anti-kink device
2 Bleed valve for the return line into the storage tank, 6/4 mm
3 Red sleeve
4 Discharge valve for discharge line to the injection point, 6/4 - 12/9 mm
5 Suction valve for suction line in the storage tank, 6/4 - 12/9 mm
8.2 Basic installation notes
CAUTION!
Danger resulting from rupturing hydraulic components
Hydraulic components can rupture if the maximum permis‐
sible operating pressure is exceeded.
– Never allow the metering pump to run against a closed
shut-off device.
–
With metering pumps without integral relief valve: Install
a relief valve in the discharge line.
CAUTION!
Hazardous feed chemicals can escape
With hazardous feed chemicals: Hazardous feed chemical
can leak out when using conventional bleeding procedures
with metering pumps.
– Install a bleed line with a return into the storage tank.
Shorten the return line so that it does not dip into the feed chemical
in the storage tank.
Safety notes
Installation, hydraulic
32
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