8.1 Installing hose lines
8.1.1
Installation of Metering Pumps Without Bleed Valve
CAUTION!
Warning of feed chemical spraying around
The pipes can loosen or rupture if they are not installed cor‐
rectly.
– Route all hose lines so they are free from mechanical
stresses and kinks.
–
Only use original hoses with the specified hose dimen‐
sions and wall thicknesses.
– Only use clamp rings and hose nozzles that are intended
for the hose diameter in question to ensure the long
service life of the connections.
CAUTION!
Danger from rupturing hydraulic components
Hydraulic components can rupture if the maximum permis‐
sible operating pressure is exceeded.
– Always adhere to the maximum permissible operating
pressure of all hydraulic components - please refer to
the product-specific operating instructions and system
documentation.
–
Never allow the metering pump to run against a closed
shut-off device.
– Install a relief valve.
CAUTION!
Hazardous feed chemicals can escape
Hazardous or extremely aggressive feed chemicals can leak
out when using conventional bleeding procedures with
metering pumps.
– Install a bleed line with return line into the storage tank.
CAUTION!
Hazardous feed chemicals can escape
Hazardous or extremely aggressive feed chemicals can leak
out in the event that the metering pump is removed from the
installation.
– Install a shut-off valve on the metering pump's pressure
and discharge sides.
CAUTION!
Uncontrolled flow of feed chemical
Feed chemicals can leak through a stopped metering pump if
there is back pressure.
– Use an injection valve or a vacuum breaker.
Safety Information
Installation, hydraulic
28
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