OIL FREE AIR COMPRESSORMITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESHIGH EFFICIENCY + CLEAN AIR= MITSUI SEIKI WATER LUBRICATE COMPRESSOR

Water lubrication is safe and sustainable.

Since 1982, Mitsui Seiki has been providing water lubricate air compressor to various
industries. With its unique compression mechanism using water instead of oil, Mitsui
Seiki oﬀers clean air, highly eﬃcent air compressor contributing to both customer
cost-saving and environment protection.

History and Types of Mitsui Seiki Compressors

Mitsui Seiki has experience with many different types of compressors stretching backto 1934. In 1982, we launched sales of water lubricate Z screw compressor. More than
30years, we have provided energy efficient, clean air compressor all over the world.
2010

1996

1

2015

Advantages of Water Lubrication
One Stage
Compressrion
Simple Structure

Low Maintenance Cost

Direct Connection with Motor(No Gear).

Water Sealing/
Cooling
Low Rotation Speed
Low Temperature

Ideal Isothermal Compression

No Oil Inside
No oil used inside compressor.
Clean air. No cost for oil filter,
separator or drain terminator.

2

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESMITSUI New Technology X Series - Oil Free Inverter Compressor
MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIES
Water Lubricated Inverter Oil Free Compressor
Air Cooled(Option : Water Cooled 22/37kW)

22kW / 37kW

Red-CX

Built-in RO treatment

5,6

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESNEW COLORX

7,8

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESNEW COLORX
IE3 motor

3

9

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIES

IE3 motor

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESEnergy saving machine
Plural control system

Averaging operating time

Averaging the operating timeof inverter machine

Alternate operation

Turn back control

Permanent fixed operation

2patterns of pressure settings
by weekly timer

Start and stop in fixed order

11

4

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESMITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESAir Cooled 22/37kW

WATER × AIRSUSTAINABLE COMPRESSOR

Mitsui Seiki launched innovative water lubricated oil free air comressor in 1982. Since then, we have delivered air
compressors to customers of various industries, such as foods, beverages, pharmaceuticals, chemical, paintshops and cosmetics where clean air supply is critically important. Mitsui Seiki water lubricated compressor use
no oil inside, thus most ideal air compressor with class zero (ISO8573-1) quality air.
i-14000X series is Mitsui Seiki new series(22kW and 37kW.) We have developed new design screw using latest theory andmanufacturing technology. Built-in automatic RO water treatment system stabilizes water quality inside compressor.
Combining SUS rotor and built-in RO system, Misui Seiki i-14000X series can supply high quality air to customers.

Big Air Delivery × Durability × Energy Saving○ Air Delivery Volume Up・Applying new technologies and analysis, we improved screw design.
・Air delivery improved 7% up from previous model.
・Pressure adjustable between 0.5-0.93MPa.

5%
UP

7%

3.80m /min
3

6.58m /min
3UP

3.50m /min
3

6.10m /min
3

Water lubrication
Oil freeInverter
IPM motor
IT touch panel
Energy saving
RED-CX compatible
Built-in RO treatment
Energy saving
Increasing
High eﬃciency
Air cooled fan inverter

5

Made of SUS

Previous model
22kW

Previous model
37kW

New X series
22kW

New X series
37kW○ Durability Up・Screw rotor is made of SUS, thus achieve high durability.
・High precision, sophisticated design screw rotor.
・Abrasion-resistant and corrosion-resistant - screw durability
become twice.

Durability

Previous screw rotor
New screw rotor○ Built-in RO Water Treatment System
・Built-in RO water treatment system automatically create ideal conditoin,
by removing impurities.(ex; Silica).

TwiceNEW FUNCTIONS○ Quick Response Reboot System
・When compressor automatic stop function work
(customer use no air), previous model had to wait
some time until compressor can re-start.
Now, new model have Quick Response Reboot
System and need to wait 66% less time until re-start.

pressure

automatic stop

auto stop pressure
target pressure

66％ less idle timei-14000 X
previous
model

time
New i-14000 X
previous model
re-start idle time

○ Global Warming
・By improving cooling air route inside compressor, even ambient temperature become 50℃,
compressor do not stop.
・When ambient temperature become 45℃, inlet temperature pre-alarm appear.
※If ambient temperature is higher than 40℃, O-rings and electrical parts need exchange
earlier than normal condition.

○ Clean Air
・Most stringent air purity standard Class 0 (ISO8573-1) quality air.
・SUS material is used for screw rotor and gate rotor.

○ 7.0-inch LCD Touch Panel・Easy and Multi-functional LCD Display.
Data logging function (Data download to USB memory.)
Schedule operation
Sudden power interruption auto re-start function (up to 20sec)
Alternative operation (Two units connect with wire, main unit and back-up unit)

・Overheat Pre-Alarm Function
When ambient temperature is higher than 45℃, inlet temperature alarm appear and warn
customer.

構内 LAN・Smartphone Compressor Monitoring Appliation (Option)
Compressors can be monitored remotely from smartphones and tablets.
Additional software is needed.

● Sudden power interruptoin auto re-start up to 20sec.
● Schedule running function.
● Alternate operation function.
● Remote monitoring from PC with Z-mate software.
● Data logging function - discharge temperature, inlet temperature,pressure(tank, user), kW, Voltage, Ampere and rotation speed.
● Data can download to USB memory and checked from PC.

Alternate Operation Function

i-14000X 2units conncet by wiring.
Main unit and back-up unit, automatic exchange.

6

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIES

Next generation inverter
oil free compressor

Simple Construction
Easy Maintenance“Water Lubricated Inverter
Oil Free Compressor”

Water Lubricated Inverter Oil Free Compressor
Air Cooled 30〜75kW
Water Cooled55〜220kW

Completely oil free system

IPM motor and direct drive improve
operating eﬃciency and durability

55/75kW Built-in Cooler Type Debut
Small Installation Space
35% Less Space! No Cooler Unit.
Installation Space
previousnew

Water Iubrication
oil freeInverter
IPM motor
Increasing
IT touch panel
RED-CX compatible
Energy saving
Environmentally friendly
High eﬃciency
Air cooled fan inverter

IPM motor (IE4 equivalent)Super Premium Eﬃciency
Motor Eﬃciency Standard
IE１… Normal Motor

IE２… High Eﬃcient Motor

IE3… Premium High Eﬃcient Motor

IE4 equivalent … Super Premium High Efficient Motor

Compressor+cooler unit
Built-in type

35% less

Synergy with inverter control greatly improves energy eﬃciency

model

7.4m /min
3

6.4m /min
3

6.58m /min3

Dry 1stage

37kW

55kW

45kW

Why Mitsui Seiki so eﬃcient?

Inverter Benefit Example
Model

R
AX-

015

i-14

R
AX-

022

i-14

R

A3-

030

i-14

R
AX-

037

i-14

R

A3-

045

i-14

R

A4-

055

i-14

R

A4-

075

i-14

W

100

i-14

W

150

i-14

W

180

i-14

W

220

i-14

15kW

22kW

30kW

37kW

45kW

55kW

75kW

100kW

150kW

180kW

220kW

14ton

23ton

26ton

38ton

39ton

64ton

88ton

128ton190ton227ton275ton

￥370k

￥590k

￥670k

￥960k

￥1,000k￥1,640k￥2,250k￥3,260k￥4,860k￥5,800k￥7,020k

0.587

i-14015AX-R

This option enables compressor to discharge increased
air delivery with lower pressure.
For example, 15kW increasing option model candischarge 30% bigger air volume at 0.39MPa.
Please ask Mitsui Seiki about detail information for thisoption.

increase

Increasing Option

i-14015AX30％

low pressure

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESStandard Fixed-speed Models
optimized for environmental performance

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESElectricity Cost of 22kW
230

220

9

Jpy70,000
/year

210

200
●￥15/kWh0

Fan Motor Inverter

Fan motor is controlled by inverter forenergy saving.

New Design Cooler●6,000h/year

Previous
motor

New design super slitﬁn is adopted toperform high cooling capability.

High Eﬃcient
IE3 motor

Climate-friendly Alternative Gas

Dryer use alternative R-407C gas toprotect ozone layer.(Built-in dryer type.)7.0-inch Easy and Multi-function LCD Display
Running conditions, alarm detail, maintenance detail andsetting can be checked easily and speedy. This display enables
easy operation of air compressor.
Menu

Water Iubrication
oil free
IT touch panel
RED-CX compatible
IE3 motor
Energy saving
Environmentally friendly
High eﬃciency
Air cooled fan inverter

High Eﬃcient
Premium IE3 Motor

Air Cooled
Water Cooled

PipingConditions

Maintenance

Data-logging

Schedule mode

● Sudden power Interruption auto re-start up to 20sec.
●Schedule running function.
●Remote monitoring from PC with Z-mate software.
●Data logging function-discharge temperature,
inlet temperature, pressure (tank, user), kW, Voltage,
Ampere and rotation speed.
●Data can download to USB memory and checkedfrom PC.

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIES

Compact compressor with great power
MITSUI SEIKI OIL FREESCREW COMPRESSOR SERIES
Water Lubricated Oil Free Compressor
Air CooledCompetitorʼs Competitorʼs CompetitorʼsClass 0

Water Iubrication
oil freeIE3 motor
Energy saving
Environmentally friendly
High eﬃciency

10

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIESSpecial Options
Low-pressure Big-volume Option
380V・400V… Lower pressure and big air volume. (i-14000X/i-14000)… We have 380/400/440V 50/60Hz option so that compressor can be used in diﬀerent voltage country.

Cold region option… If compressor is located in cold region, internal heater works to prevent compressor from freezing.

Outdoor option … Compressor is protected by walls and roof toprevent rain get inside.

Water cooling … If compressor location is diﬃcult to ventilate,

we have water cooling option. (15kW and bigger.)

Automatic RO water trearment system… RO system always control the water quality inside compressor tokeep compressor in good condition.
※Please ask Mitsui Seiki for these options.

Outdoor option

Receiver Tank
Material
Color

Munsell7.5Y/1

Model

Capacity Maximum pressure

WeightAccessory Safety valve

Pressure gauge and drain valve

Documents

Japanese pressure vessel standard

DiameterHeightPiping size
socketf lange※Please ask Mitsui Seiki about 1500-6000L tank.
※Please ask Mitsui Seiki about stainless steel tank.
※We recommend epoxy coating in case of oil free compressor.
※Use anchor to firmly position tank.
※Please follow pressure vessel regulations of each country.
※Please ask Mitsui Seiki for more detailed information.

Clean Air System
Please check air purity levelneeded in your factory, andchoose adequate equipment.

Air UseLine Filter
Air-tool, Air-motor, Air-press, painting, Spray

Air Purity

Dry air 1-5μm
A little amount of oil particle and dust inside air is permissible

Line Filter + Mist Filter
Instrument air, Electrostatic coating,
Drying air and Electric parts

Dry oil-free air 0.1-0.01μm
Clean air. Oil, dust and water are not allowed in compressed air.

Line ﬁlter + Mist ﬁlter + Carbon ﬁlter
Pharmaceutical, food, brewery, packing,ozone generator, science labo and caisson air

Dry oil-free deodor air 0.003-0.01μm
Clean air. Oil, dust, water and smell are strictly not allowed.

MITSUI SEIKI OIL FREE SCREW COMPRESSOR SERIES

R
R
R
R
R
R
R
-R
-R
AXAXAXWA3A3A4A4W3
W3
015
022
037
100
030
045
055
075
055
075
i-14
i-14
i-14
i-14
i-14
i-14
i-14
i-14
i-14
i-14

W
150
i-14

W
180
i-14

W
220
i-14

25.0
※
（25.9）

31.0※（36.0）

37.5※（38.5）

150

180

220

※
0.7
（0.39）

2.54
※
（3.3）

3.8
※
（4.7）

4.8
※
（5.5）

6.58
※
（7.6）

15

22

30

37

7.4
※
（8.8）

9.5
※
（11.8）

13.0※（14.7）

9.5※（11.8）

45

55

75

55

13.0
17.4
※
※
（14.7）（19.9）
75

100

200/200・220400

Air cooled
2.2

1.5

3.7

3.0

7.5

（Inverter control） （Inverter control） （Inverter control） （Inverter control） （Inverter control）

23

L

Water cooled

Air cooled

3.026

0.15/0.22（Inverter control）

40

65（0.15/0.22）
×2

100

135

200

10
Refrigerant
Refrigerant amount-

0.51/0.64

1.1/1.3

1.5/1.8

1.4/1.7

2.1/2.5

2.4/2.8

R-407CR-410A

R-407CR-410A

R-407CR-410A

340

650

800

1050

900

1300

1

750
1640

1640

1510

1715

2.9/3.6-

R-407C
800

1 1/2

-

2200

JIS 10k 3B（80A）ﬂange JIS 10k 4B（100A）ﬂange

2

1457
1780
2068
2538
（1277） （1430） （1850） （2195）

1407

2.1/2.5

2450（2005）

2300
2600（1860） （1860）

900

1190

1200

1595

1800

1500

（2750）
1200

1500
1800

650

700

730

1050

1090

-

1480

1350

1520

2100

2400

3050

3100

54〜57

55〜59

56〜63

61〜65

59〜66

-

63.5〜69

61〜63

63.5〜65

65〜67

66〜70

64〜69

66〜70

3-R 3-R3-R 3-R
55W556W
55W756W
5
7
0
0
4
4
0
0
u-1 u-14
u-1 u-14

3-R -R
55A 6A3
401 14015
1uu-

3-R -R
25A 6A3
402 140221uu-

3-R -R
75A 6A3
403 14037
1uu-

3-R -R
55A 6A3
405 14055
1
u
u-

2.3

3.5

6.1

9.5

13.0

9.5

13.0

15

22

37

55

75

55

75

3-R -R
55A 6A3
407 14075
1
u
u-

0.7

200/200・220(IE3 motor)

1.5（Inverter control）

2.2（Inverter control）
23

L

3.0（Inverter control）

7.5（Inverter control）+0.15/0.22

0.15/0.22

40

100
10

0.55/0.63・0.66

1.5/1.8

1.5/1.9

Refrigerant amount2.1/2.5

2.9/3.6

280

600
1

800

800

2200

1 1/2

1457
（1277）

2.9/3.6

800

2200

2068
（1850）

2300（1860）

2600（1860）

2
2600（1860）

2300（1860）

750
1510

1200
1595

1500

670

750

1160

1480

1705

1530

1805

57

59

65

69

69

65

69

380 / 400 / 440V option is also available.

i-14037AX-R
13

2.1/2.5

R-407C

Refrigerant

①

②

③④

⑤

u-140225A3-R
①

②

③④⑤ ⑥

5
85A
ZU0

5
86A
ZU0

5
15A
ZU1

5
16A
ZU1

ZU-085A5

0.7
1.06

①

1.61

7.5

② ③④⑤

11
200/200・220(IE3 motor)

0.08

0.12

0.15

0.22

20

L

3/4
56

58
880×750×1450

410

460

◎Speciﬁcations for discharge pressure of 0.93MPa (factory option) available on request.
◎380/400/440V option is also available.

WS2
005
ZU1

WS2
006
ZU1

WS2
205
ZU1

WS2
206
ZU1

ZU-1006WSH

0.7
18.2

17.4

21.3

440

400

100
400

20.8

①

② ③④⑤⑥120440(IE3 motor)
水冷

0.15

0.22

0.15

0.22

135

L

250

300

68

70

◎Speciﬁcations for discharge pressure of 0.93MPa (factory option) available on request.
◎Please ask Mitsui Seiki for dimention and weight.

For the safe use of Mitsui Seiki air compressor
1. Free air delivery shows air volume measured with JISB 8341 standard, andconverted to inlet conditions of JISB 8341 standard.
2. Do not use discharged air for respiratory purpose for human.
3. Make sure that ambient temperature is always below 40C˚. Install compressor atindoor ventilated environment.
4. Please contact Mitsui Seiki for product warranty and guaranteed values.
5. Please follow environmental regulations of each region.
6. Please contact Mitsui Seiki for detail information about power supply and installation details.
7. Machine specification may change without prior notice.
○ Read instruction manuals and warning labels carefully and follow instructions.
○ Please use Mitsui Seiki genuine parts only.
○ Feel free to contact Mitsui Seiki for any questions.

14

〜

…

37kW〜…

20 m

i-14015AX-R

100AF-100AT

50AF-50AT

30KVA

22mm²M814mm²M88mm²M58mm²M5ーi-14022AX-R

225AF-150AT

100AF-75AT

45KVA

38mm²M822mm²M814mm²M614mm²M610t

i-14030A3-R

225AF-175AT

100AF-100AT

55/60KVA

60mm²M838mm²M622mm²M614mm²M610t

i-14037AX-R

225AF-225AT

225AF-125AT

70/75KVA

100mm²M1022mm²M1022mm²M814mm²M810t

i-14045A3-R

400AF-300AT

225AF-150AT

75/85KVA

100mm²M10

38mm²M838mm²M822mm²M815t

i-14055A4-R

400AF-350AT

225AF-175AT

95KVA

100mm²M1238mm²M860mm²M822mm²M8ーi-14055W3-R

400AF-350AT

225AF-175AT

95KVA

100mm²M1238mm²M860mm²M822mm²M815t

i-14075A4-R

400AF-400AT

225AF-225AT

130KVA

150mm²M1238mm²M1060mm²M1038mm²M10

ーi-14075W3-R

400AF-400AT

225AF-225AT

130KVA

150mm²M1238mm²M1060mm²M1038mm²M1020t

i-14100W

ー

400AF-250AT

200KVAーー

100mm²M1238mm²M1230t

i-14150W

ー

400AF-350AT

250KVAーー

100mm²M1238mm²M1230t

i-14180W

ー

600AF-500AT

300KVAーー

200mm²M1238mm²M1240t

i-14220W

ー

600AF-600AT

350KVAーー

250mm²M1238mm²M1240t

u-14015A3-R

100AF-100AT

100AF-60AT

25KVA

22mm²M814mm²M514mm²M514mm²M55t

u-14022A3-R

225AF-200AT

100AF-100AT

35KVA

38mm²M1022mm²M522mm²M822mm²M510t
10t

u-14037A3-R

NV250-SEV,HEV 時延形

55KVA

100mm²M10

38mm²M538mm²M1022mm²M5

NF400-SEW,HEW-400AT

225AF-225AT

80KVA

150mm²M1238mm²M860mm²M822mm²M8ーu-14055W3-R NF400-SEW,HEW-400AT

225AF-225AT

80KVA

150mm²M1238mm²M860mm²M822mm²M815t

u-14055A3-R※1 NF250-SEV,HEV-225AT NF250-SEV,HEV-150AT※2NF400-SEW,HEW-400AT

NV400-SEW,HEW 時延形※1 NF250-SEV,HEV-225AT

110KVA

200mm²M1238mm²M8100mm²M1022mm²M10

ー

NV400-SEW,HEW 時延形※2NF400-SEW,HEW-400AT※1 NF250-SEV,HEV-225AT

NV250-SEV,HEV 時延形

110KVA

200mm²M1238mm²M8100mm²M1022mm²M1020t

ZU08A5

100AF-60AT

50AF-40AT

15KVA

8mm²M55.5mm²M5

3.5mm²M4

5.5mm²M4ー

ZU11A5

100AF-75AT

50AF-50AT

20KVA

14mm²M614mm²M6

5.5mm²M4

14mm²M5ーu-14075A3-R
u-14075W3-R

NV250-SEV,HEV 時延形◎Use recommended SEV, SEW or HEV, HEW breaker(made by Mitsubishi Electric Corporation.)◎Use recommended NV series leak-detect type breaker or NF series non-fuse breaker(made by Mitsubishi Electric Corporation).
◎For 55kW and smaller compressor, size of cable is calculated when continuos maximum allowed temp of cable is 75℃(HIV wire) and ambient temperature <50℃, wiring length below 20m.
◎For 75kW and bigger compressor, size of cable is calculated when continuous maximum allowed temp of cable is 90℃(LMFC wire) and ambient temperature <50℃, wiring length below 20m.
※ Air cooling machine do not need cooling tower. For water cooling compressor and 15-45kW water cool option machine, please check cooling tower capacity in above list.
◎For other models and specs, please contact Mitsui Seiki for detailed information.
◎Wiring size of inverter compressor is calculated when continuous maximum allowed temp of cable is 75℃ HIV wire(55kW and below), 90℃ LMFC wire(75kW and bigger). Wiring length below 20m.
※For u-140375A3-R, u-14075A3-R and u-14075W3-R, please use designated Mitsubishi Breaker instantaneous tripping current adjustable up to 16x type.

15

compressor

(A)

(D)

Exhaust

(C)

(F)

(B)

(E)

Room intake (B) ＝ room ventilation (A) + compressor FAD

Room intake (E) ＝ room ventilation (C) + exhaust (D) + compressor FAD

Room ventilation (A) m3/min

Room ventilation (C) m3/mincompressor

Exhaust (D)(F) m3/mincompressor

Dryer

compressor

built-in dryer typebuilt-in dryer type compressor(D) built-in dryer type(F)i-14015AX-R

57

12

157

190

8

41

80

19

i-14022AX-R

84

11

230

260

12

42

90

22

i-14030A3-R

108

14

299

336

15

53

100

47

i-14037AX-R

140

18

387

437

20

70

190

47

i-14045A3-R

162

22

448

509

23

84

150

47

i-14055A4-R

198

33

547

639

28

119

220

78

i-14055W3-R

40

20

109

166

ー

ー

50

47

i-14075A4-R

270

33

747

838

38

129

300

78

i-14075W3-R

54

37

149

252

ー

ー

50

107

i-14100W

72

ー

199

ー

ー

ー

55

ー

i-14150W

108

ー

299

ー

ー

ー

55

ー

i-14180W

130

ー

358

ー

ー

ー

110

ー

i-14220W

158

ー

438

ー

ー

ー

110

ー

u-14015A3-R

54

8

149

171

8

30

80

27

u-14022A3-R

79

14

219

257

11

49

80

31

u-14037A3-R

133

17

368

416

19

66

120

47

u-14055A3-R

40+［158］20

109+［438］

166+［438］

28

85

50+［370］47

u-14055W3-R

40

20

109

166

ー

ー

50

47

u-14075A3-R

54+［216］37

149+［597］

252+［597］

38

140

50+［370］

107

u-14075W3-R

54

37

149

252

ー

ー

50

107

ZU08A5

32

ー

75

ー

4

ー

80

ー

ZU11A5

47

ー

100

ー

6

ー

90

ー

◎[ ] shows ﬁgure of cooler unit

16

20-120* We recommend RO water. Well water and industrial water do not suffice this standard.

Connect pipes with union joints or flange joints for maintenance purpose.

Release the remainingpressure between 5kpressure valve and stop
valve.

When supply water pressure exceeds 0.3MPa or water-hammer phenomenon occur, it may cause air end
leaking. In that case, please add water regulator and relief valve.

17

18

6-13 Hachiman, Kawajima-Machi, Hiki-Gun,
Saitama, 350-0193, JAPAN
Phone +81-49-297-8711 Fax +81-49-297-5377
204/956 City Park Moo1, Soi Emthai, Teparak (k.m.22),
T. Bangsaothong, A. Bangsaothong, Samutprakarn, 10540, THAILAND
Phone +66 (0) 2-313-1881 Fax +66 (0) 2-313-1883
No28, Minyi Rd. Xinqiao, Songjiang, Shanghai, 201612, CHINA
Phone +86 (0) 21-5768-7460 Fax +86 (0) 21-5768-6891◎The products and specifications in this catalog are current as of JUL 2020.

2020.02.O