Danfoss iSave 50, iSave 70 Data sheet

Data sheet

iSave® Energy Recovery Device iSave 50 / iSave 70

hpp.danfoss.com

Data sheet | iSave 50 and iSave 70

Table of Contents

Contents

 

 

 

 

 

 

1.

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

 

2.

Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

 

3.

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

 

4.

Technical data . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . .

. . . .

.

4

 

4.1

iSave without motor . . . . . . . . . . . . . . . . . . .

. . . . . . . . . .

. . . .

.

4

 

4.2

iSave with IEC motor . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . 6

 

4.3

iSave with NEMA motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

 

5.

Performance curves . . . . . . . . . . . . . . . . . . .

. . . . . . . . . .

. . . .

.

8

 

5.1

Flow at different rpm . . . . . . . . . . . . . . . . . . .

. . . . . . . . . .

. . .

.

.8

 

5.2

iSave 50 flow curves . . . . . . . . . . . . . . . . . . .

. . . . . . . . . .

. . . .

.

8

 

5.3

iSave 70 flow curves . . . . . . . . . . . . . . . . . . .

. . . . . . . . . .

. . . .

.

8

 

5.4

Torque curve for iSave 50 and iSave 70 . . . . . . . . . .

. . . . . . . . . . . . . . . 9

 

5.5

Mixing curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

 

6.

Temperature and corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

 

6.1

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

 

7.

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

 

7.1

Operation and mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

 

7.2

Horizontal mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . .

. . . . . . .

. .

10

 

7.3

Connection to inlet or discharge ports: . . . . . . . . . .

. . . . . . . . . .

. . . . . 11

 

7.4

Filtration . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . .

. . . . 11

 

7.5

Noise . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . 11

 

7.5

RO systems with an iSave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

 

8.

Dimensions and connections . . . . . . . . . . . . . . .

. . . . . . . . . .

. . . . 14

 

8.1

iSave 50-70 without electric motor . . . . . . . . . . . .

. . . . . . . . . .

. . . .

.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

9.1

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

9.2

Operational conditions of concern . . . . . . . . . . . . . . . . . . . . . . . . . . .21

9.3

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

9.4

Repair assistance

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.

21

10.

Accessories . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.

21

11. Useful documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

2

AI264763692435en-000901 | Data sheet iSave 50-70 | UK | 04.2021

Danfoss iSave 50, iSave 70 Data sheet

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

 

reverse osmosis (RO) systems to recycle the

designed to provide long service life with a

 

energy held in discharged brine from the

constant high efficiency and minimum service

 

membranes. Thus, iSave 50 and iSave 70 are

required.

 

designed for use with low viscosity and corrosive

Unlike a centrifugal pump, it produces a similar

 

fluid such as sea water.

flow at a given speed no matter what discharge

 

The Danfoss iSave Energy Recovery Devices all

pressure.

 

 

 

consist of an isobaric pressure exchanger and a

 

 

positive displacement pump combined into one

 

 

compact unit. The high-pressure booster pump

 

 

is based on the vane pump principle enabling a

 

 

very light and compact design. The vane pumps

 

 

are fixed displacement pumps in which the flow

 

 

is proportional to the number of revolutions

 

 

(rpm) of the driving shaft – enabling flow control.

 

 

Speed control is made by a VFD. The iSave design

 

 

ensures lubrication of the moving parts by the

 

 

fluid itself.

 

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

Significant power savings and low specific

 

 

energy consumption (SEC)

 

Simple and space-saving installation with

 

 

both pump and pressure exchanger in one

 

 

unit

 

Simple system design and monitoring

 

 

without requirement for high-pressure flow

 

 

meters

 

Simple operation with design that prevents

 

 

overspin/overflushing

 

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

 

of RO desalination plant around the world.

 

Typical applications for iSave 50 - 70 will be:

 

Containerized solutions for hotels and

 

 

resorts on islands as well as coastal regions

 

Onboard systems for ships

 

Offshore platforms for the oil and gas

 

 

industry

 

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

 

 

 

 

 

 

 

 

 

 

 

iSave size

 

iSave 50

iSave 70

 

 

 

 

 

 

 

 

Code number

 

180F7020

180F7021

 

 

 

 

 

 

 

 

Pressure

 

 

 

 

 

 

 

 

 

 

 

Max. differential pressure (HP out - HP in)

barg

5

5

 

 

 

 

 

 

 

psig

72

72

 

 

 

 

 

 

 

 

 

 

 

Min. pressure HP out (min. allowable working

barg

40

40

 

 

 

 

 

 

 

pressure)

psig

580

580

 

 

 

 

 

 

 

 

Max. pressure HP out (Max. allowable working

barg

83

83

 

 

pressure, MAWP) 1)

psig

1200

1200

 

 

Min. pressure on HP in,

barg

2

2

 

 

intermittent 2) 3)

psig

29

29

 

 

Max. pressure LP in (MAWP) 1)

barg

5

5

 

 

 

 

 

 

 

psig

72

72

 

 

 

 

 

 

 

 

 

 

 

Max. pressure LP in, peak

barg

10

10

 

 

 

 

 

 

 

psig

145

145

 

 

 

 

 

 

 

 

 

 

 

Min. allowable working pressure LP in

barg

2

2

 

 

 

 

 

 

 

psig

29

29

 

 

 

 

 

 

 

 

 

 

 

Max. differential pressure (LP in - LP out)

barg

0.53

0.79

 

 

 

 

 

 

 

psig

7.69

11.46

 

 

 

 

 

 

 

 

 

 

 

Max. static test pressure (HP in and HP out)

barg

108

108

 

 

 

 

 

 

 

psig

1566

1566

 

 

 

 

 

 

 

 

 

 

 

Max. static test pressure (LP in and LP out)

barg

13

13

 

 

 

 

 

 

 

psig

189

189

 

 

 

 

 

 

 

 

 

 

 

Speed

 

 

 

 

 

 

 

 

 

 

 

Min. speed

rpm

525

625

 

 

 

 

 

 

 

 

Max. speed

rpm

650

875

 

 

 

 

 

 

 

 

Typical flow 4)

 

 

 

 

 

Flow at min. speed, HP out

m³/h

42

50

 

 

 

 

 

 

 

gpm

184

220

 

 

 

 

 

 

 

 

 

 

 

Flow at max. speed. HP out

m³/h

52

70

 

 

 

 

 

 

 

gpm

228

308

 

 

 

 

 

 

 

 

 

 

 

Max. lubrication flow at 60 barg (871 psig)

l/min

25

25

 

 

 

 

 

 

 

gpm

6.6

6.6

 

 

 

 

 

 

 

 

 

 

 

Peak flow, LP in 10)

m³/h

120

120

 

 

 

 

 

 

 

gpm

528

528

 

 

 

 

 

 

 

 

 

 

 

Max. allowable working flow, LP in 7)

m³/h

57.2

70

 

 

 

 

 

 

 

gpm

252

308

 

 

 

 

 

 

 

 

 

4

AI264763692435en-000901 | Data sheet iSave 50-70 | UK | 04.2021

Data sheet | iSave 50 and iSave 70

Technical specifications

 

 

 

 

 

 

 

 

 

 

Media temperature 5)

 

oC

2-35

 

2-35

 

oF

36-95

 

36-95

 

 

 

Ambient temperature

 

oC

0-50

 

0-50

 

oF

32-122

 

32-122

 

 

 

Filtration requirements (nominal) 6)

 

3 micron melt-blown

 

Salinity increase at membrane at 40% recovery rate at

2-3%

 

balanced flow 9)

 

 

 

 

 

 

 

 

Weight (dry)

 

kg

164

 

164

 

 

 

 

 

 

lb

362

 

362

 

 

 

 

 

 

 

 

 

Weight (operation with water)

kg

172

 

172

 

 

 

 

lb

379

 

379

 

 

 

 

 

 

 

 

 

Noise

 

 

 

 

 

 

 

 

 

 

 

Sound pressure level L

1 m 8)

dB(A)

83

 

86

PA

 

 

 

 

 

Torque data

 

 

 

 

 

 

 

 

 

 

 

Max. allowable working torque

Nm

170

 

190

 

 

 

 

lbf-ft

125

 

140

 

 

 

 

 

 

 

 

 

Max. starting torque (stick/slip)

Nm

180

 

180

 

 

 

 

lbf-ft

132

 

132

 

 

 

 

 

 

 

 

 

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

 

iSave 50

 

iSave 70

Code number (vertical)

 

180F7038

 

180F7040

 

 

 

 

 

Code number (horizontal)

 

180F7023

 

180F7025

 

 

 

 

 

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

 

 

 

 

Technical specifications

 

 

 

 

 

 

 

 

Media temperature 5)

 

°C

2-35

2-35

 

 

 

 

 

°F

36-95

36-95

 

 

 

 

 

 

Filtration requirements (nominal) 6)

 

3 micron melt-blown

Weight (dry) vertical/horizontal

kg

441/463

441/463

 

 

 

lb

972/1021

972/1021

 

 

 

 

 

 

Weight (operation with water) vertical/

kg

470/471

470/471

horizontal

 

lb

1036/1038

1036/1038

 

 

 

 

 

Noise

 

 

 

 

 

 

 

 

 

Sound pressure level L

1 m 2)

dB(A)

83

86

PA

 

 

 

 

Footprint

 

 

 

 

 

 

 

 

 

Footprint (vertical position) 3)

0.44

0.44

 

 

 

foot²

4.71

4.71

 

 

 

 

 

 

 

Footprint (horizontal position) 3)

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

985

985

 

 

 

 

 

Rated current at 400V

 

A

37

37

 

 

 

 

 

Motor size

 

kW

18.5

18.5

 

 

 

 

 

HP

30.0

30.0

 

 

 

 

 

 

 

Frame size

 

IEC

200 L

200 L

 

 

 

 

 

Poles

6

6

 

 

 

 

 

 

 

Rated motor torque at nominal speed

Nm

177

177

 

 

 

lbf-ft

130.5

130.5

 

 

 

 

 

 

 

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.

 

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

 

 

 

Code number (vertical)

180U0062

180U0064

 

 

 

Code number (horizontal)

180U0003

180U0005

 

 

 

Pressure, Speed, Flow, Temperatue and Torque are identical with

180F7020

180F7021

 

 

 

Efficiency

Efficiency at max. speed at 60 barg (871 psig) 7)

%

93.7

92.4

Technical specifications

 

 

 

 

 

 

 

 

Media temperature 5)

 

°C

2-35

2-35

 

 

 

 

 

°F

36-95

36-95

 

 

 

 

 

 

Filtration requirements (nominal) 6)

 

3 micron melt-blown

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)

0.44

0.44

 

 

 

foot²

4.71

4.71

 

 

 

 

 

 

 

Footprint (horizontal position) 3)

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

Loading...
+ 15 hidden pages