Data sheet
iSave® Energy Recovery Device iSave 50 / iSave 70
hpp.danfoss.com
Data sheet | iSave 50 and iSave 70
Table of Contents |
Contents |
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1. |
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 |
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2. |
Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 |
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3. |
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 |
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4. |
Technical data . . . . . . . . . . . . . . . . . . . . . . |
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4 |
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4.1 |
iSave without motor . . . . . . . . . . . . . . . . . . . |
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. . . . |
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4 |
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4.2 |
iSave with IEC motor . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . 6 |
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4.3 |
iSave with NEMA motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 |
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5. |
Performance curves . . . . . . . . . . . . . . . . . . . |
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8 |
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5.1 |
Flow at different rpm . . . . . . . . . . . . . . . . . . . |
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.8 |
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5.2 |
iSave 50 flow curves . . . . . . . . . . . . . . . . . . . |
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8 |
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5.3 |
iSave 70 flow curves . . . . . . . . . . . . . . . . . . . |
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8 |
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5.4 |
Torque curve for iSave 50 and iSave 70 . . . . . . . . . . |
. . . . . . . . . . . . . . . 9 |
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5.5 |
Mixing curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 |
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6. |
Temperature and corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 |
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6.1 |
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 |
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7. |
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 |
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7.1 |
Operation and mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 |
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7.2 |
Horizontal mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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10 |
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7.3 |
Connection to inlet or discharge ports: . . . . . . . . . . |
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. . . . . 11 |
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7.4 |
Filtration . . . . . . . . . . . . . . . . . . . . . . . . . |
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. . . . 11 |
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7.5 |
Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . 11 |
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7.5 |
RO systems with an iSave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 |
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8. |
Dimensions and connections . . . . . . . . . . . . . . . |
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. . . . 14 |
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8.1 |
iSave 50-70 without electric motor . . . . . . . . . . . . |
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.14 |
8.2iSave 50-70 with with IE3 motor 18.5 kW on base frame vertical_front mounted . . . . .15
8.3iSave 50-70 with with IE3 motor 18.5 kW on base frame vertical_back mounted . . . . .16
8.4iSave 50-70 with with IE3 motor 18.5 kW on base frame horizontal . . . . . . . . . . . 17
8.4iSave 50-70 th NEMA motor 30 HP on base frame vertical - front mounted . . . . . . . .18
8.5iSave 50-70 with NEMA motor 30 HP on base frame vertical - back mounted . . . . . . 19
8.5iSave 50-70 with NEMA motor 30 HP on base frame horizontal . . . . . . . . . . . . . 20
9. |
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 |
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9.1 |
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 |
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9.2 |
Operational conditions of concern . . . . . . . . . . . . . . . . . . . . . . . . . . .21 |
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9.3 |
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 |
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9.4 |
Repair assistance |
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21 |
10. |
Accessories . . . |
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21 |
11. Useful documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
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AI264763692435en-000901 | Data sheet iSave 50-70 | UK | 04.2021 |
Data sheet | iSave 50 and iSave 70
1. General information |
Energy Recovery Devices (ERD) are used in |
All parts included in the iSave 50 & 70 are |
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reverse osmosis (RO) systems to recycle the |
designed to provide long service life with a |
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energy held in discharged brine from the |
constant high efficiency and minimum service |
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membranes. Thus, iSave 50 and iSave 70 are |
required. |
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designed for use with low viscosity and corrosive |
Unlike a centrifugal pump, it produces a similar |
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fluid such as sea water. |
flow at a given speed no matter what discharge |
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The Danfoss iSave Energy Recovery Devices all |
pressure. |
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consist of an isobaric pressure exchanger and a |
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positive displacement pump combined into one |
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compact unit. The high-pressure booster pump |
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is based on the vane pump principle enabling a |
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very light and compact design. The vane pumps |
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are fixed displacement pumps in which the flow |
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is proportional to the number of revolutions |
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(rpm) of the driving shaft – enabling flow control. |
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Speed control is made by a VFD. The iSave design |
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ensures lubrication of the moving parts by the |
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fluid itself. |
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1. 3” Victaulic connections
2. Shaft
3. Low pressure shaft seal
4. Port flange
6. Valve plate
7. Cylinder barrel
9. Port plate (brine)
10. Port plate (sea water)
11. Vanes
12. Coupling
13.Intermediate flange
14.Rotor
15.Rotor element
16.Sealing plate
17.Stator
18.Motor end flange
2. Benefits |
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Significant power savings and low specific |
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energy consumption (SEC) |
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Simple and space-saving installation with |
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both pump and pressure exchanger in one |
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unit |
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Simple system design and monitoring |
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without requirement for high-pressure flow |
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meters |
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Simple operation with design that prevents |
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overspin/overflushing |
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Easy modular service |
•Corrossion resistance (all wetted parts are made of high corrosion-resistant materials e.g. Super Duplex or Duplex)
•Fewer components
3. Applications |
Danfoss iSave ERDs are built into a broad range |
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of RO desalination plant around the world. |
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Typical applications for iSave 50 - 70 will be: |
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Containerized solutions for hotels and |
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resorts on islands as well as coastal regions |
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Onboard systems for ships |
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Offshore platforms for the oil and gas |
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industry |
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Municipal and private waterworks |
AI264763692435en-000901 | Data sheet iSave 50-70 | UK | 04.2021 |
3 |
Data sheet | iSave 50 and iSave 70
4. |
Technical data |
4.1 iSave without motor |
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iSave size |
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iSave 50 |
iSave 70 |
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Code number |
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180F7020 |
180F7021 |
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Pressure |
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Max. differential pressure (HP out - HP in) |
barg |
5 |
5 |
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psig |
72 |
72 |
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Min. pressure HP out (min. allowable working |
barg |
40 |
40 |
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pressure) |
psig |
580 |
580 |
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Max. pressure HP out (Max. allowable working |
barg |
83 |
83 |
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pressure, MAWP) 1) |
psig |
1200 |
1200 |
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Min. pressure on HP in, |
barg |
2 |
2 |
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intermittent 2) 3) |
psig |
29 |
29 |
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Max. pressure LP in (MAWP) 1) |
barg |
5 |
5 |
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psig |
72 |
72 |
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Max. pressure LP in, peak |
barg |
10 |
10 |
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psig |
145 |
145 |
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Min. allowable working pressure LP in |
barg |
2 |
2 |
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psig |
29 |
29 |
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Max. differential pressure (LP in - LP out) |
barg |
0.53 |
0.79 |
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psig |
7.69 |
11.46 |
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Max. static test pressure (HP in and HP out) |
barg |
108 |
108 |
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psig |
1566 |
1566 |
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Max. static test pressure (LP in and LP out) |
barg |
13 |
13 |
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psig |
189 |
189 |
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Speed |
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Min. speed |
rpm |
525 |
625 |
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Max. speed |
rpm |
650 |
875 |
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Typical flow 4) |
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Flow at min. speed, HP out |
m³/h |
42 |
50 |
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gpm |
184 |
220 |
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Flow at max. speed. HP out |
m³/h |
52 |
70 |
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gpm |
228 |
308 |
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Max. lubrication flow at 60 barg (871 psig) |
l/min |
25 |
25 |
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gpm |
6.6 |
6.6 |
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Peak flow, LP in 10) |
m³/h |
120 |
120 |
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gpm |
528 |
528 |
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Max. allowable working flow, LP in 7) |
m³/h |
57.2 |
70 |
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gpm |
252 |
308 |
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4 |
AI264763692435en-000901 | Data sheet iSave 50-70 | UK | 04.2021 |
Data sheet | iSave 50 and iSave 70
Technical specifications |
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Media temperature 5) |
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oC |
2-35 |
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2-35 |
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oF |
36-95 |
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36-95 |
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Ambient temperature |
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oC |
0-50 |
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0-50 |
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oF |
32-122 |
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32-122 |
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Filtration requirements (nominal) 6) |
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3 micron melt-blown |
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Salinity increase at membrane at 40% recovery rate at |
2-3% |
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balanced flow 9) |
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Weight (dry) |
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kg |
164 |
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164 |
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lb |
362 |
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362 |
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Weight (operation with water) |
kg |
172 |
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172 |
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lb |
379 |
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379 |
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Noise |
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Sound pressure level L |
1 m 8) |
dB(A) |
83 |
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86 |
PA |
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Torque data |
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Max. allowable working torque |
Nm |
170 |
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190 |
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lbf-ft |
125 |
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140 |
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Max. starting torque (stick/slip) |
Nm |
180 |
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180 |
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lbf-ft |
132 |
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132 |
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1)Max. allowable working pressure of continous operation. For lower and higher pressure, please contact Danfoss.
2)Typical pressure level at start-up and permeate flush.
3)Intermittent pressure is acceptable for less than 10 minutes within a period of 6 hours.
4)Typical average flow at 60 barg and 3 barg differential pressure
5)Dependent on NaCI concentation.
6)Please see section 7.4 filtration.
7)Continuous operation: iSave can operate continuously with up to 10% over flush with the limitation that the flow rate at LP inlet shall not exceed 70 m3/h.
8)A-weighted sound pressure level at 1 m from the pump unit surfaces (reference box) acc. to EN ISO 20361 section 6.2. The noise measurements are performed acc. to EN ISO 3744:2010 on a motor- pump-unit at max. pressure and rpm.
9)Balanced flow: The mixing rate is defined at balanced flow when HP-out is equal to LP-in.
10)At system start-up: iSave can run for up to 10 min. with 150% of max. rated flow at LP inlet. The time where max. rated flow is exceeded should be kept as short as possible to minimize wear.
AI264763692435en-000901 | Data sheet iSave 50-70 | UK | 04.2021 |
5 |
Data sheet | iSave 50 and iSave 70
4.2 iSave with IEC motor
i iSave size |
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iSave 50 |
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iSave 70 |
Code number (vertical) |
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180F7038 |
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180F7040 |
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Code number (horizontal) |
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180F7023 |
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180F7025 |
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Pressure, Speed, Flow, Temperature and Torwue are identical with |
180F7020 and |
180F7021 |
Efficiency
Efficiency at max. speed at 60 barg (871 psig) |
% |
93.7 |
92.4 |
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Technical specifications |
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Media temperature 5) |
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°C |
2-35 |
2-35 |
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°F |
36-95 |
36-95 |
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Filtration requirements (nominal) 6) |
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3 micron melt-blown |
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Weight (dry) vertical/horizontal |
kg |
441/463 |
441/463 |
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lb |
972/1021 |
972/1021 |
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Weight (operation with water) vertical/ |
kg |
470/471 |
470/471 |
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horizontal |
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lb |
1036/1038 |
1036/1038 |
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Noise |
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Sound pressure level L |
1 m 2) |
dB(A) |
83 |
86 |
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PA |
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Footprint |
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Footprint (vertical position) 3) |
m² |
0.44 |
0.44 |
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foot² |
4.71 |
4.71 |
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Footprint (horizontal position) 3) |
m² |
0.76 |
0.76 |
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foot² |
8.14 |
8.14 |
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Torque data |
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Max. allowable working torque |
Nm |
170 |
177 |
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lbf-ft |
125 |
130.5 |
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Max. starting torque (stick/slip) |
Nm |
180 |
180 |
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lbf-ft |
132 |
132 |
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Motor data |
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Nominal speed |
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rpm |
985 |
985 |
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Rated current at 400V |
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37 |
37 |
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Motor size |
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kW |
18.5 |
18.5 |
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HP |
30.0 |
30.0 |
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Frame size |
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IEC |
200 L |
200 L |
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Poles |
6 |
6 |
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Rated motor torque at nominal speed |
Nm |
177 |
177 |
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lbf-ft |
130.5 |
130.5 |
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Rated motor ambient temperature 4) |
°C |
40 |
40 |
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°F |
104 |
104 |
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Motor insulation |
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Class |
B |
B |
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Motor degrees of protection |
IP |
55 |
55 |
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2)A-weighted sound pressure level at 1 m from the ERD unit surfaces (reference box) acc. to EN ISO 20361 section 6.2. The noise measurement are performed acc. to EN ISO 3744:2010 on an ERD with motor (motor pump unit) from min. to max. pressure and speed.
3Area covered with recommended IE3 motor configurations (excl. of space to service the ERD))
4)For higher temperature, contact Danfoss.
5)Dependent on NaCI concentation.
6)Please see section 7.4 Filtration
7) |
Typical efficiency for pressure exchanger, |
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booster pump, electrical motor and VFD at 3 |
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barg differential pressure after a system has |
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been commissioned and run in. |
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6 |
AI264763692435en-000901 | Data sheet iSave 50-70 | UK | 04.2021 |
Data sheet | iSave 50 and iSave 70
4.3 iSave with NEMA motor
iSave size |
iSave 50 |
iSave 70 |
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Code number (vertical) |
180U0062 |
180U0064 |
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Code number (horizontal) |
180U0003 |
180U0005 |
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Pressure, Speed, Flow, Temperatue and Torque are identical with |
180F7020 |
180F7021 |
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Efficiency
Efficiency at max. speed at 60 barg (871 psig) 7) |
% |
93.7 |
92.4 |
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Technical specifications |
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Media temperature 5) |
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°C |
2-35 |
2-35 |
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°F |
36-95 |
36-95 |
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Filtration requirements (nominal) 6) |
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3 micron melt-blown |
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Weight (dry) vertical/horizontal |
kg |
484/506 |
484/506 |
||
|
|
|
|||
lb |
1067/1116 |
1067/1116 |
|||
|
|
||||
|
|
|
|
||
Weight (operation with water) vertical/ |
kg |
513/535 |
513/535 |
||
horizontal |
|
lb |
1131/1179 |
1131/1179 |
|
|
|
|
|
|
|
Noise |
|
|
|
|
|
|
|
|
|
|
|
Sound pressure level L |
1 m 2) |
dB(A) |
83 |
86 |
|
PA |
|
|
|
|
|
Footprint |
|
|
|
|
|
|
|
|
|
|
|
Footprint (vertical position) 3) |
m² |
0.44 |
0.44 |
||
|
|
|
|||
foot² |
4.71 |
4.71 |
|||
|
|
||||
|
|
|
|
|
|
Footprint (horizontal position) 3) |
m² |
0.76 |
0.76 |
||
|
|
|
|||
foot² |
8.14 |
8.14 |
|||
|
|
||||
|
|
|
|
|
|
Torque data |
|
|
|
|
|
|
|
|
|
|
|
Max. allowable working torque |
Nm |
170 |
177 |
||
|
|
|
|||
lbf-ft |
125 |
130.5 |
|||
|
|
||||
|
|
|
|
|
|
Max. starting torque (stick/slip) |
Nm |
180 |
180 |
||
|
|
|
|||
lbf-ft |
132 |
132 |
|||
|
|
||||
|
|
|
|
|
|
Motor data |
|
|
|
|
|
|
|
|
|
|
|
Nominal speed |
|
rpm |
1180 |
1180 |
|
|
|
|
|
|
|
Rated current at 400V |
|
A |
36.2 |
36.2 |
|
|
|
|
|
|
|
Motor size |
|
kW |
22.5 |
22.5 |
|
|
|
|
|
||
|
HP |
30.0 |
30.0 |
||
|
|
||||
|
|
|
|
|
|
Frame size |
|
NEMA |
324/6T |
324/6T |
|
|
|
|
|
||
|
Poles |
6 |
6 |
||
|
|
||||
|
|
|
|
|
|
Rated motor torque at nominal speed |
Nm |
179 |
179 |
||
|
|
|
|||
lbf-ft |
132 |
132 |
|||
|
|
||||
|
|
|
|
|
|
Rated motor ambient temperature 4) |
°C |
40 |
40 |
||
|
|
|
|||
°F |
104 |
104 |
|||
|
|
||||
|
|
|
|
|
|
Motor insulation |
|
Class |
B |
B |
|
|
|
|
|
||
Motor degrees of protection |
IP |
55 |
55 |
||
|
|
|
|
|
2)A-weighted sound pressure level at 1 m from the ERD unit surfaces (reference box) acc. to EN ISO 20361 section 6.2. The noise measurement are performed acc. to EN ISO 3744:2010 on an ERD with motor (motor pump unit) from min. to max. pressure and speed.
3Area covered with recommended IE3 motor configurations (excl. of space to service the ERD))
4)For higher temperature, contact Danfoss.
5)Dependent on NaCI concentation.
6)Please see section 7.4 Filtration
7) |
Typical efficiency for pressure exchanger, |
. |
|
booster pump, electrical motor and VFD at 3 |
|
|
barg differential pressure after a system has |
. |
|
been commissioned and run in. |
|
AI264763692435en-000901 | Data sheet iSave 50-70 | UK | 04.2021 |
7 |