Temperature And Corrosion; Noise Level - Danfoss APP series User Manual

Data sheet
8. Temperature and
corrosion
9.

Noise level

8
APP 16-22
8.1 Operation
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)
The chart on the next page illustrates the
corrosive resistance of different 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 flush the water pump with fresh water at
operation stop in order to minimize the risk of
crevice corrosion.
80 º
C
70
60
50
316L
40
30
20
1000
100
160 1600
The sound pressure levels, L PA, 1 m
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 flexible 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.
180R9265 / IOM APP 16-22 Appendices - v02 / 01.2013
8.2 Storage
Storage temperature:
-40° C to +70° C (-40° F to 158° F) – provided
that the pump is drained of fluid and stored
"plugged".
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.
Duplex
Super Duplex
10 000
16000
*) db(A) for The noise level is influenced by:
The speed of the pump, high rpm create
more noise than low rpm
Rigid mounting of the pump generates
more noise than flexible mounting
Pipe mounting direct to the pump
increases the noise level compared to a
flexible hose
If using a VFD the motors can produce
higher noise values depending on the
operation point.
*) 1 meter from the pump unit surfaces (refer-
ence box) acc. to EN ISO 20361 section 6.2.
Deviation σTOT = ± 1,6 dB(A)
NaCl vs. temperature
CI -
100 000
ppm
NaCI
160000
ppm