7.1 Basic installation notes
CAUTION!
Danger resulting from rupturing hydraulic components
Hydraulic components can rupture if the maximum per‐
missible 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 chem‐
ical can leak out when using conventional bleeding pro‐
cedures 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.
Fig. 18: (A) standard installation, (B) with pulsation damper
1 Main line
2 Storage tank
Symbol Explanation Symbol Explanation
Metering pump Foot valve with filter meshes
Injection valve Level switch
Multifunctional valve Manometer
Safety notes
Legend for hydraulic diagram
Installation, hydraulic
31
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