OIL-FREE COMPRESSORS

Supplying perfectly oil-freecompressed Air

CDH-460W

CDH series is a revolutionary oil-free screw compressor developed by HANSHIN advancing to a world

class compressor company having 37 year compressor manufacturing experience, adopting oil-freeairend block of German GHH-RAND who developed the oil-free airend block first in the world in 1952

year. We would like to invite you to the world of a real clean air where you have been longing for.

Oil-free Double Stage Screw CompressorOil-free Double Stage Screw Compressor

COMPRESSED AIR SYSTEMS

3

CDH-75W

Absolutely oil free compressed airVersatile cooling type(air/water cooled)Simple installation with low costMinimized maintenance costHigh reliability, performance and efficiencyDesigned and manufactured according to ISO 9001Easy operation and maintenanceMinimized noise level packageSmoother and quieter operation

Features

Advantages ULTRA COATING ROTORS

This coating offers highly efficient corrosion protection even underextreme conditions (approx. 300 ). In addition, it is a decisive factorfor improving efficiency : reducing discharge temperature of theairend, increasing volume flow while decreasing power consumption.

STAINLESS STEEL HIGH PRESSURE STAGE ROTORThe stainless steel HP rotor pair is rust-free from condensed water.

INLET BLOW-DOWN SYSTEMSwitching of loading & unloading by oil pressure shortens the entiresystem cycle, thereby reducing power consumption cost. Besides, themaintenace is easy and economical with pneumatically operated.

1. Large capacity2. Optimum profile (asymmetrical) : male 3 teeth, female 4 teeth3. Special coating (no teflon)

- resistant against high temperature and pressure- excellent sliding properties

4. Improved sealing effect

AirendAbsolutely oil free compression Low power consumptionNo balance pistonsNo rubber diaphragmEfficient jacket cooling (water or oil)Slower turning of rotorSmoother and quieter operationLess vibrationLeak free oil drains from airend to gear boxLeak free input shaft seal designStainless steel HP rotor pairEnhanced coating of air passages,housings and rotors

Low pressure stage LP

1. High pressure increase2. Optimum profile (asymmetrical) : male 4 teeth, female 6 teeth3. Special coating (no teflon)

- resistant against high temperature and pressure- excellent sliding properties

4. Improved sealing effect

High pressure stage HP

1. Rotors to be fixed in defined position by axial & radial bearings2. Clearance between rotors to be kept costant by timing gear3. No air leakage losses from compression

chamber via rotor journals4. No lube oil from bearing to the compression chamber

(negative thread)

Highly reliable sealing system

casing

shaft splash ringoil-retainingring

sealing ring spacer ring

oiltankOil

vent holeAir

retaining ring

angular ring

COMPRESSED AIR SYSTEMS

5

The oil pump is driven bydriving shaft of airend anddelivers oil to actuatingcylinder of inlet/blow-downsystem via oil cooler andoil filter with an optimumvolume, thus prolongingthe life time of rotors andbearings.

Movement of inlet on/off valve causes action of blow-down unloading valve. The actuatingcylinder of unloading valve is connected to oil system of compressor block. The oil pump issufficiently sized. (Pneed=2.5bar g, Pposs=25.0bar g)

Switching of loading & unloading by oilpressure shortens the system cycle, there-by reducing power consumption cost.Besides, the maintenace is easy and eco-nomical with pneumatically operated.

Full loading / No loading mechanism

a) Full loading- oil pressure of magnetic valve

on/off valve opensunloading valve closesfull-load operation

b) Unloading- no oil pressure of magnetic valve

on/off valve colsesunloading valve opensunloading operation

Oil pressure

Oil tankatmosphere

Air inlet

LP upstream

HP downstream

Inlet/Blow down system

Oil pump

SYMBOLS

LP

HP

CV

IC

AC

F1

S1

S2

S3

M1

PSV

SOL

V1

DS1,DS2

PI1

PI2

PI3

PSHL

PDI1

TE1,2,4,5

TIC1

TIC2

TIC4

TIC5

TI1

DESCRIPTION

1st STAGE

2nd STAGE

CAPACITY CONTROL VALVE

INTER COOLER

AFTER COOLER

SUCTION AIR FILTER

1st DISCHARGE SILENCER

2nd DISCHARGE SILENCER

PURGE SILENCER

MAIN MOTOR

SAFETY VALVE

3-WAY SOLENOID VALVE

CHECK VALVE

1st / 2nd DRAIN SEPARATOR

1st DISCHARGE PRESSURE GAUGE

2nd SUCTION PRESSURE GAUGE

2nd DISCHARGE PRESSURE GAUGE

AIR PRESSURE SWITCH

SUCTION FILTER DIFFERENTIAL PRESSURE GAUGE

TEMPERATURE SENSOR

1st DISCHARGE TEMP. INDICATOR & SWITCH

2nd DISCHARGE TEMP. INDICATOR & SWITCH

MOTOR BEARING TEMP. INDICATOR & SWITCH(FRONT)

MOTOR BEARING TEMP. INDICATOR & SWITCH(REAR)

1st DISCHARGE TEMPERATURE GAUGE

SYMBOLS

LP

HP

CV

OC

F2

S3

M1

OP

SOL

PV

PR

OT

LG

PI4

PI5

PSL

PD12

TE3

TIC3

B

DESCRIPTION

1st STAGE

2nd STAGE

CAPACITY CONTROL VALVE

OIL COOLER

OIL FILTER

PURGE SILENCER

MAIN MOTOR

OIL PUMP

3-WAY SOLENID VALVE

OIL RELIEF VALVE

OIL REGULATING VALVE

OIL TANK

LEVEL GAUGE

LUBE OIL PRESSURE GAUGE

OIL PRESSURE SWITCH

LOW OIL PRESSURE SWITCH

OIL FILTER DIFFERENTIAL PRESSURE GAUGE

TEMPERATURE SENSOR

OIL TEMPERATURE INDICATOR & S/W

BREATHER

AIR FLOW DIAGRAM

OIL FLOW DIAGRAM

COMPRESSED AIR SYSTEMS

7

Compressor motor overload shutdown and lightOil pump motor overload shutdown and lightFan motor overload shutdown and lightHigh first stage air discharge temperature shutdown and lightHigh second stage suction temperature shutdown and lightHigh second stage air discharge temperatureshutdown and lightHigh oil temperature shutdown and lightLow oil pressure shutdown and lightAlarm bellBell cancel switchReset switchStart / Stop push buttonsEmergency push buttonLow water flow shutdown and light (water cooled)

PRESSURE GAUGEAir inlet filter condition indicatorFirst stage air discharge pressure gaugeSecond stage air discharge pressure gaugeOil pressure gaugeOil filter conditionindicator

TEMPERATURE GAUGEFirst stage air dischargetemperature displaySecond stage air inlettemperature displaySecond stage air discharge temperature displayOil temperature display

GAUGEOil level gauge Running timer , load timerPower light Oil pump run lightCompressor run light Compressor load lightFan run light Fault lightManual unload light and switchLamp test switchWater temperature and flow light

CONTROL & MONITORING SYSTEM

TECHNICAL SPECIFICATIONS

ELECTRONIC MICOM TYPE MONITOR PANEL IS OPTIONAL.

FAD(m

3/min)

Motor 220/380/440 220/380/440/3300

Y- /Reactor Reactor

Water CooledAir Cooled/Water Cooled

3300/6600

Cooling Type

Cooling Water(m3/hr)

Discharge Pipe Dia(A)

Cooling Pipe Dia(A)

Lubricant Charge(L)

Dimension

Weight(kg)

AB

C

A(mm)

B(mm)

C(mm)

KW

V

Starting

7.5kgf/cm

2

8.5kgf/cm

2

10.5kgf/cm

2

8.5

7.8

7.3

55

-

50

-

22

2000

1450

1700

2600

65

50

40

2500

1750

2200

80

65

75

3200

1800

2200

100

80

120

4500

2500

2300

MODELSITEMS

CDH55

12

11

9.7

75

7.9

2700

CDH75

14.4

13

11.9

90

9.7

3100

CDH90

17

17

14.6

110

7.6

3250

CDH110

22.4

19.8

-

132

12.6

3500

CDH132

26.2

24.5

21.8

160

15.3

3700

CDH160

31

28.1

-

180

18.4

4200

CDH180

36.7

36.6

28.7

220

30

4300

CDH220

45.8

43.5

-

270

27.6

4500

CDH270

49.5

45.7

41.3

300

29.7

4700

CDH300

51.9

49.5

43.5

315

32

4800

CDH315

57.1

56.9

-

370

36.6

6700

CDH370

69.9

69.7

-

420

43.5

7000

CDH420

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