ProMinent Hydro 3 Series, Руководство по эксплуатации, Страница: 26 / 96

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.
CAUTION!
Uncontrolled flow of feed chemical
Feed chemical can leak through the metering pump in an
uncontrolled manner in the event of excessive priming pres‐
sure on the suction side of the metering pump.
–
Do not exceed the maximum permissible priming pres‐
sure for the metering pump.
– Set up the installation properly.
CAUTION!
Warning against lines coming loose
Suction, discharge and relief lines installed incorrectly can
come loose from the pump connection.
–
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 tension.
Only connect steel piping via a flexible piping section to
a plastic valve body - see the following figure.
1
2
3
P_MOZ_0021_SW
Fig. 10: Connect the steel piping to the plastic pump body as shown
1 Steel piping
2 Flexible pipe section
3 Plastic valve body
CAUTION!
Warning against leaks
Leaks can occur on the pump connection depending on the
insert used.
–
The pump is supplied with PTFE moulded composite
seals with a flare, which are used for the pump connec‐
tions. They seal the connections between grooved pump
valves and the grooved inserts from ProMinent - see
Fig. 11.
– However, in the event that a smooth insert is used (e.g.
third party part), an elastomer flat seal must be used -
see Fig. 12.
P_SI_0021
Fig. 11: Moulded composite seals with
corrugated insert
Installation
26