Technical Data And Design Review; Design Details; Sound Level Of The Isave; Materials - Danfoss iSave 40 Series Operation Manual

Operation guide | iSave 40
5. Technical data and
design review

5.1 Design details

design review
1: 3" Victaulic connections
2: Shaft
3: Low pressure shaft seal
4: Port flange
5: Port plate
6: Valve plate
7: Cylinder barrel
8: Port flange
9: Sealing plate
10: Pins
11: Vanes
12: Port plate
13: Coupling
14: Adapter flange
15: Rotor
16: Stator
17: Port plate
18: Outlet flange
12

5.2 Sound level of the iSave

The A-weighted sound pressure level @ 1m,
L is 84 dB (A) for the iSave including the iSave
PA, 1M
motor. Measurements are according to
EN ISO 3744: 2010. The test is made under
following conditions:
1. iSave and electric motor mounted on Danfoss
base plate.
2. Base plate is isolated from concrete ground by
rubber vibration dampeners.
3. Flexible hoses are used on high pressure and
low pressure sides of the iSave.
4. Rotation speed 1,200 rpm.
5. System pressure 80 bar and a booster pressure
of 3 barg.
Influences:
Since the iSave is mounted on a base plate and
connected to the electric motor by a bell
housing, the noise level can only be determined
for the complete unit (system).
It is therefore important that the iSave unit is
mounted correctly on a frame with dampeners
to minimise vibrations and noise.
It is also strongly recommended to use high-
pressure flexible hoses between the hard piping
in the RO plant and the iSave. See "hose assem-
bly and installation" in appendix 10.7.
180R9239 | AQ299555093252en-001601 | iSave 40 | 09.2022
Alternative use multiple flexible Victaulic®
couplings on the hard piping.
The noise level is influenced by:
• The speed of the iSave. High speed creates
more noise than low speed.
• Rigid mounting of the iSave base plate
generates more noise than flexible mounting.
• Pipe mounting directly to the iSave increases
the noise level compared to flexible hoses.
• Pressure: Higher pressure provide higher
sound level.

5.3 Materials

All critical parts of the iSave are made of Super
Duplex 1.4410/UN S32750 or the like.
Non-critical parts that are not in contact with sea
water are made of AISI316.
The shaft to the electric motor is sealed by a
standardised mechanical seal.
For a detailed material/part overview see
appendix 10.5.