Danfoss APP series User Manual

8
180R9265 / IOM APP 16-22 Appendices - v02 / 01.2013
Data sheet APP 16-22
8.1 Operation
The chart on the next page illustrates the
corrosive resistance of dierent types of stainless
steel related to NaCl concentration and tempera-
ture.
All critical parts of the APP water pump are made
of Super Duplex.
If the water pump is operated at high salinity,
always ush the water pump with fresh water at
operation stop in order to minimize the risk of
crevice corrosion.
8.2 Storage
Frost protection is required at temperatures
below 2°C. Danfoss recommends to use DOW-
FROST from DOW Chemical Company or Chilsafe
mono propylene glycol from Arco Chemical
Company.
8. Temperature and
corrosion
316L
Super Duplex
80
º
C
70
60
50
40
30
20
100
160 1600
1000
16000
10 000
160000
100 000
CI
-
ppm
NaCI
ppm
Duplex
NaCl vs. temperature
9. Noise level The sound pressure levels, L PA, 1 m
*)
db(A) for
APP 16-22 pumps are typically 82 dB(A) at
60 bar/1500rpm and 84 dB at 80 bar/1500rpm.
Generally, noise will be reduced if speed is
reduced and vice versa. Use exible hoses in
order to minimize vibrations and noise.
Since the pump is typically mounted on a bell
housing or frame, the noise level must be
determined for the complete unit (system). It is
therefore very important that the motor/pump
unit is mounted correctly on a frame with
antivibration isolation to minimize vibrations and
noise.
The noise level is inuenced by:
t The speed of the pump, high rpm create
more noise than low rpm
t Rigid mounting of the pump generates
more noise than exible mounting
t Pipe mounting direct to the pump
increases the noise level compared to a
exible hose
t If using a VFD the motors can produce
higher noise values depending on the
operation point.
t
*) 1 meter from the pump unit surfaces (refer-
ence box) acc. to EN ISO 20361 section 6.2.
Deviation σTOT = ± 1,6 dB(A)
Fluid temperature:
+2° C to +50° C (+35.6° F to 122° F) - dependent
on the NaCl concentration
Ambient temperature:
+2° Cto +50° C (+35.6° F to 122° F)
Storage temperature:
-40° C to +70° C (-40° F to 158° F) – provided
that the pump is drained of uid and stored
”plugged”.

Danfoss APP series Specifications

General

Brand	Danfoss
Model	APP series
Category	Water Pump
Language	English