CAUTION!
Suction problems are possible
The valves may no longer close properly with feed
chemicals with a particle size of greater than 0.3 mm.
– Install a suitable filter in the suction line.
CAUTION!
Warning of the discharge line rupturing
With a closed discharge line (e.g. from a clogged dis‐
charge line or by closing a valve), the pressure that the
metering pump generates can reach several times more
than the permissible pressure of the system or the
metering pump. This could lead to lines rupturing
resulting in dangerous consequences with aggressive or
hazardous feed chemicals.
– Install a relief valve that limits the pressure of the
pump to the maximum permissible operating pres‐
sure of the system.
CAUTION!
Warning against rupturing of suction or discharge lines
Hose lines with insufficient pressure rating may rupture.
– Only use hose lines with the required pressure
rating.
CAUTION!
Uncontrolled flow of feed chemical
Feed chemical can press through the metering pump in
an uncontrolled manner in the event of excessive pri‐
ming pressure on the suction side of the metering pump.
– Do not exceed the maximum permissible priming
pressure for the metering pump or
–
Set up the installation properly.
CAUTION!
Warning about lines coming loose
If suction, discharge and relief lines are installed incor‐
rectly, they can loosen / disconnect from the pump con‐
nection.
– Only use original hoses with the specified hose
diameter and wall thickness.
–
Only use clamp rings and hose nozzles that fit the
respective hose diameter.
– Always connect the lines without mechanical ten‐
sion.
Installation
27
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