9
180R9265 / IOM APP 16-22 Appendices - v02 / 01.2013
Data sheet
APP 16-22
As water has very low viscosity, the APP pumps
have been designed with very narrow clearance
in order to control internal leakage rates and
improve component performance. Therefore it is
important that the inlet water is
fi
ltered properly
to minimize the wear of the pump.
The main
fi
lter must have a
fi
ltration e
ffi
ciency of
99.98% at 10
μ
m. We recommend to use
precision depth
fi
lter cartridges rated 10
μ
m abs.
ß10>5000 (equivalent to a
fi
ltration e
ffi
ciency of
99.98%). Bag
fi
lters and string wound
fi
lter
cartridges typically have only 50%
fi
ltration
e
ffi
ciency. This means that for each 100,000 parti-
cles reaching the
fi
lter, 50,000 particles pass
through it compared to only 20 particles in a
fi
lter with an e
ffi
ciency of 99.98%.
For more information on the importance of
proper
fi
ltration, please consult our publication
“Filtration” (code number 521B1009), which also
will provide you with an explanation of
fi
ltration
de
fi
nitions and a guidance on how to select the
right
fi
lter.
10.
Filtration
11.
Dimensions
Outlet
O
I