Shanghai Crownwell Compressor Co., Ltd.  
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Crownwell Permanent Magnet VSD Screw Compressor

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Product Description

CROWNWELL OIL-INJECTED PERMANENT MAGNET COMPRESSOR

CWD 7-400 PM (7.5-400kW / 10-500hp)

 

CROWNWELL COMPRESSOR – HIGHEST STANDARD

 

SIMPLICITY BUT NOT SIMPLE 

For three generations, customers from mechanical engineering, industry and trade have relied on CROWNWELL know-how when it comes to planning, developing and manufacturing compressed air systems. They are fully aware of the fact that CROWNWELL AIR is more than just ordinary compressed air: utmost safety, outstanding efficiency, excellent quality, maximized flexibility along with dependable service are the ingredients to transform CROWNWELL AIR into air to work with – in China, in Asia and in more than 102 countries around the world.

 

The III generation, the basis for economical compressed air production

 

The Know-How

More than decades of know-how in manufacturing for the compressed air market. World wide knowledge in different compressed air applications have guided the development of Crownwell customer specified stationary screw compressors.

 

Technical Advancement for your Benefit

The advantage of CROWNWELL lies in its simplified construction. Fewer components are utilized. This means a 60% reduction in main and wearing parts and over 70% fewer pipes and connections. In turn, this greatly reduces the risk of leakages, making the system environmentally friendly. Safe direct drive operation without V-belt transmission.

 

The CROWNWELL Screw Compressor works in the following way:

Ambient air is drawn through the intake filter and the multifunctional control system into the screw compressor block. This block consists of a pair of screw rotors. The main rotor, driven by an electric motor, takes the secondary rotor with it. The air is drawn in by the rotation of both of the interlocking rotors and is continually compressed. During rotation, coolant is injected into the rotors and forms a hydrostatic film between the main and secondary rotors. The function of the coolant is to seal the rotors, lubricate the bearings and adsorb the compression heat. Before compressed air leaves the compressor ( at 80 ℃ approx.) it is separated from the coolant before being cooled in the aftercooler to approx.. 8℃ to 12℃ above the ambient temperature. The coolant then passes to the thermostatic control block and filter, before entering the cooler where it is cooled from approx.. 80℃ down to 50℃. It is then injected back into the Crownwell screw compressor block.

 

Features:

Direct drive via flexible coupling.

Fully encapsulated CROWNWELL screw compressor block.

Standard electric motor Protection Index IP23 and IP54.

User friendly service access.

Top quality, washable, oil resistant sound insulation.

Ready for operation, prewired and fully enclosed.

With operating mode selector switch Automatic-Off-Continuous.

Centrally mounted cooling fan provided for compressed air and lubricant coolers.

Compact and neat cabinet design.

 

Optional Equipment:

Sense of rotation

Multiple unit control with automatic base load selection

Full motor protection

Mains isolator switch for wall mounting

 

Beyond these features we offer a wide choice of compressed air accessories in reference to our compressor product range.

Energy Recovery Systems CROWNWELL-THERM

Compressed Air Filters

Compressed Air Dryers

Condensate Traps

Oil-Water Separators

Compressed Air Receivers

 

CROWNWELL – System and direct drive

Your benefits

 

The CROWNWELL Screw compressor block

With coolant injection. Technically advanced, performance optimized profile from the quality assured production facility of our top screw. Highest degrees of precision are maintained throughout rotor production, by grinding and not milling; this ensures that each individual rotor is compatible with every mating rotor. Further, the generously dimensioned combination of cylindrical roller bearings for radial support and four point bearings for axial support is a guarantee of the longest possible service life. Additional safety is built into the heavy duty casing which is designed for pressures up to 15 bar.


Your benefit:

  • High efficiency

  • Low power expenses

  • Low off load expenses

  • Long life time of the screw compressor block

  • Long life time of the bearings

  • Low service expenses

 

Safety Separation System

with five stage pre-separation and the dry sump which acts as a second separator in series:

 

Your benefit:

  • Prevents coolant breakthrough

  • Guarantees a constant residual coolant content in each operating phase of only 1-3 mg/m3

  • Ensures the longest service life of the separator cartridge.

  • Guarantees the lowest internal pressure losses (0.05 bar) by the large internal cross-sectional area.

  • The horizontal mounting of the pre-separation vessel allows for a large capacity of coolant which results in  maximum separation, prevents build up of scum and premature oxidation, even during intermittent operation.

  • Low waste disposal expenses

  • High production reliability

 

Maintenance free multifunctional Intake Regulator System

           

Your benefit:

  • Increases the life span of the screw compressor block by compensating the high compression ratio and thus the axial thrust spike at every change of load/full load/stop.

  • Eliminates maintenance and repair works as well as potential leakage points since it replaces all conventional fittings that are susceptible to failure and abrasion, such as:

  • Reducing damper (or butterfly valve) with regulating cylinder

  • Non-return valve after the screw compressor block

  • Oil stop valve

  • Blow down valve as well as all associated connections, gaskets, washers and pipework.

  • Operationally and intrinsically safe. Seals hermetically in the case of power failure. Unwelcome oil leakages are no longer possible.

  • Lowest maintenance costs


Parameter

OIL-INJECTED PERMANENT MAGNET COMPRESSOR

 

TECHNICAL SPECIFICATIONS CWD 7-400 PM

(7.5-400kW / 10-500hp)



Model

Motor Power

kW / hp

Free Air Delivery

m3/min

Noise Level

dB(A)

Dimension

L * W * H

mm

Weight

Kg

7barg

8barg

10barg

13barg

CWD7 PM

7.5 / 10

1.3

1.2

1.0

0.8

66

760*700*920

200

CWD11 PM

11 / 15

1.7

1.6

1.4

1.2

68

980*750*1000

350

CWD15 PM

15 / 20

2.5

2.3

2.1

1.9

68

980*750*1000

360

CWD18 PM

18.5 / 25

3.2

3.0

2.7

2.4

68

1120*850*1160

500

CWD22 PM

22 / 30

3.8

3.6

3.2

2.8

68

1120*850*1160

520

CWD30 PM

30 / 40

5.3

5.0

4.5

4.0

68

1120*850*1160

550

CWD37 PM

37 / 50

6.8

6.2

5.6

5.0

68

1280*1000*1290

750

CWD45 PM

45 / 60

8.0

7.3

7.0

5.9

72

1280*1000*1290

780

CWD55 PM

55 / 75

10.1

9.5

8.7

7.8

72

1800*1230*1570

1600

CWD75 PM

75 / 100

13.6

12.8

12.3

10.2

72

1800*1230*1570

1800

CWD90 PM

90 / 125

16.2

15.5

14.0

12.5

72

1800*1230*1570

1900

CWD110 PM

110 / 150

21.2

19.8

17.8

15.5

72

2400*1470*1840

2500

CWD132 PM

132 / 180

24.5

23.2

20.5

17.8

75

2400*1470*1840

2700

CWD160 PM

160 / 215

28.8

27.8

25.0

22.4

75

2400*1470*1840

3000

CWD185 PM

185 / 250

32.5

31.2

28.0

25.8

75

3150*1980*2150

3500

CWD200 PM

200 / 270

36.0

34.3

30.5

28.0

82

3150*1980*2150

4000

CWD250 PM

250 / 350

43.0

41.5

38.2

34.9

82

3150*1980*2150

4500

CWD315 PM

315 / 400

51.0

50.2

44.5

39.5

82

3150*1980*2150

6000

CWD355 PM

355 / 450

64.0

61.0

56.5

49.0

84

3150*1980*2150

6500

CWD400 PM

400 / 500

71.2

68.1

62.8

52.2

84

3150*1980*2150

7200


  • nex C, Edition 4 (2009)

    Reference conditions:

    -Relative humidity 0%

    -Absolute inlet pressure: 1 bar (a) (14.5 psi)

    -Intake air temperature:  20°C, 68°F

  • Noise level measured according to ISO 2151:2004, operation at max. operating pressure and max. speed; tolerance: ±3 dB(A)

  • Crownwell PM-Permanent Magnet


OIL-FREE PERMANENT MAGNETIC FREQUENCY COMPRESSOR 

TECHNICAL DATA CW 7-160 OF PM



Model

Motor Power

kW / hp

Free Air Delivery

m3/min

Noise Level

dB(A)

Dimension

L * W * H

mm

Weight

Kg

7barg

8barg

10barg

CW7 OF PM

7.5 / 10

0.3-1.2

0.2-1.1

0.1-1.0

58

1100*800*1000

520

CW11 OF PM

11 / 15

0.3-1.6

0.2-1.5

0.1-1.3

58

1100*800*1000

540

CW15 OF PM

15 / 20

0.4-2.4

0.3-2.3

0.2-2.0

60

1130*900*1040

570

CW18 OF PM

18.5 / 25

0.5-3.1

0.4-2.8

0.3-2.5

61

1400*1000*1200

620

CW22 OF PM

22 / 30

0.6-3.7

0.5-3.4

0.4-3.0

61

1400*1000*1200

675

CW30 OF PM

30 / 40

0.8-5.2

0.7-4.7

0.6-4.3

61

1400*1000*1200

1170

CW37 OF PM

37 / 50

0.9-6.1

0.8-5.6

0.7-5.0

66

1920*1170*1320

1220

CW45 OF PM

45 / 60

1.1-7.5

1.0-6.8

0.9-6.0

66

1920*1170*1320

1340

CW55 OF PM

55 / 75

1.5-10.0

1.3-9.0

1.1-7.8

66

1920*1170*1320

1540

CW75 OF PM

75 / 100

1.9-13.0

1.8-12.0

1.5-10.0

70

2150*1600*1680

1640

CW90 OF PM

90 / 125

2.3-15.5

2.1-14.0

1.8-12.5

70

2150*1600*1680

2720

CW110 OF PM

110 / 150

3.0-20.0

2.7-18.0

2.4-16.0

72

2150*1600*1680

3120

CW132 OF PM

132 / 180

3.7-25.0

3.4-23.0

3.0-20.0

72

2150*1600*1680

3270

CW160 OF PM

160 / 215

4.0-27.0

3.8-25.5

3.6-24.0

72

2860*1500*1750

4520


  • Unit performance measured according to ISO 1217, Annex C, Edition 4 (2009)

    Reference conditions:

    -Relative humidity 0%

    -Absolute inlet pressure: 1 bar (a) (14.5 psi)

    -Intake air temperature:  20°C, 68°F

  • Noise level measured according to ISO 2151:2004, operation at max. operating pressure and max. speed; tolerance: ±3 dB(A)

  • Crownwell OF-Oil-free

  • PM-Permanent magnetic


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+86-21-59170296
+86-18817705916
E-mail
sales@crownwell-compressor.com
Address
No.8, Lane 800 Yanghui Rd., Shanghai 201314 China.

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