CMJ Sectional Valve Mobile Directional Control Valve …pub/@eaton/@hyd/documents/co… · Mobile...

Mobile Directional Control Valve

CMJ Sectional Valve Rate Pressure: 230barFlow rate 60, 80L/min

3

4

5

5

7

9

10

10

12

14

Table of Contents

General Introduction

Operation Data

CMJ60

Schematic and Installation

Specifications and Spool Types

Characteristics Curves

CMJ80

Schematic and Installation


Characteristics Curves

EATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 20132

Typical Applications

• Excavatorandminiexcavator• Backhoeloader• Horizontaldirectionaldrilling• Forklift• Agriculturalmachinery

• Open center sectional control valve

• Max. pressure: 230 bar

• Two flow options available: 60 LPM; 80 LPM

• Using low friction seals and wipers

• Low pressure drop and low noise through optimized casing and oil path design

• Flexible configuration for multiple functions

• Low hysteresis and high dynamic valve design

• Low internal leakage due to optimum spool design

• High market acceptance due to reliability and durability

• Three Main Relief Valves provide added system protection in complex excavator applications. (Market leading design)

• P1 and P2 can purge additional flow from P3 through special patented circuit design to achieve higher work circuit speeds

• Load Holding valve for Boom Holding

• Multiple valve port relief configurations available

• For traction drive control, P1 and P2 separately supply left and right traction, while P3 supplies other functions, e.g. bucket load will not impact the traction speed during “travel straight mode”

General Introduction

Features & Benefits

The open center system is widely applied in compact machinery, e.g. typically mini excavator. Compared with other systems, open center systems are market-proven products with competitive cost and high levels of reliability.

This catalogue introduces two types of open center sectional valves applicable to 5~7 Ton mini excavator applications.

NotesOther larger mono-block valves are available on request, please consult AP product marketing for further information.

EATON Mobile Directional Control Valve Catalogue E-VLMD-MC003-E2 January 2013 3

Operation Data

Model CMJ60 CMJ80

SpoolspecificationSpoolDia=14.5mm SpoolDia=16.0mm

SpoolStroke=8.0mm SpoolStroke=8.0mm

Ratedpressure 220bar 230bar

Max.pressure 240bar 250bar

Pilotportratedpressure 40bar 40bar

Max.flowP1,P2–60LPM P1,P2–80LPM

P3–40LPM P3–40LPM

Max.backpressurePeak–20bar Peak–20bar

Normal–8bar Normal–8bar

Temperaturerange -20~90°C -20~90°C

Hydraulicoil ISOVG46Equivalent ISOVG46Equivalent

Mainreliefsetting 220bar@40LPM 230bar@50LPM

Overloadreliefsetting 240bar@10LPM 250bar@20LPM

Internalleakage 8cc/min@70bar&37Cst 8cc/min@70bar&37Cst

Typicalvehicleapplication 5Ton 5-7Ton


60L/min

CMJ60

Schematic of typical mini excavator application

a3

a4

a5

a6

a7

pp

a8

a9

a10

a11

T1

Swing

Dozer

A3

B3b3

A4

B4b4

P3Boom 2

Breaker

Arm

A5B5

b5

A6

B6

A7

B7

P2

b6

b7

Mr2

Mr1

Travelb8B8

A8

b9B9

A9

P1

Boom 1

B10

A10

b10

b11

B11

Bucket

T2

Arm22

Drxb9

4

Travel


60L/min

CMJ60

Installation, mm

Pilot port 19-pf1/4

T1-Port pf1

26

34

65

84

89.5

107

14.5

19

107

142.5

136.52

273.5

136.5131

B

Pf 1/2(t2)

Torq

ue

4 kgf.m

44

50

55

38

44

55

Torque

3 kgf.m

a11

a10

a9

a8

Pf 1/4xb9

Pf 1/4Dr

PP

a7

a6

a5

Pum

o in

let(

P1.

P2.

P3)

3-p

f1/2

Torque4 kgf.m

Torque4 kgf.m

Cyl

. p

ort

17-

pf

1/2

Torque

1.5 kgf.m

a3

a4

4- 10 Thru

Torque3 kgf.m

55

44

55

44

Name platePart No.Serial No.

15.5

28

38

88

38

38

55

55

38

38

38

28

15.5

b3

b4

b5

b6

b7

b8

b9

b10

b11

B11A10

B10A9

A8B9

B8

A7

B7A6

B6A5

B5

A4

B4A3

B3

P3

P2

P1

512 482


pa

pb

P B A T

P BY T

M Mpa

P B A T

P BY T

pbM M

P BA T

P T

M Mb a

pa

P B T

P BY T

pbM M

pa

P BA T

P T

pb M M


Section schematic function - Hydraulic pilot control

Section schematic function - Manual control

Inlet section schematic (Mini excavator applications)

CMJ60

1.HydraulicallyOperated,3-PositionSpoolandregenerationfromAtoBline,whilethespoolismovedtotherightdirection.

1.ManuallyOperated,3-PositionSpoolwhichisopenedtoTfromAandBportinneutralcondition.

ATravelStraightfunctionisintegratedininletblock.Inordertomakethisfunctionworknormally,apilotpressurefrompilotgearpumpisneededtosupplytoPPport.

4.HydraulicallyOperated,3-PositionSpoolwhichhasP->Bline,whilethespoolismovedtotherightdirection.

2.HydraulicallyOperated,3-PositionSpoolwhichhasorificeinB->Tlineonly.

P2

P1

PP

3.HydraulicallyOperated,3-PositionSpoolwhichisopenedtoTfromAandBportinneutralcondition.


Exploded View

Pressure drop curve

CMJ60

P

P1098

1

2345

67

4035302520151050

0

6560555045

P

of P-T Neutral Flow

Flow Rate(LPM)

P

P16

14

12

2

4

6

8

10

40353025201510500

6560555045

P

of P-C

Flow Rate(LPM)

P

P4.5

4

3.5

1

1.5

2

2.5

3

4035302520151050

06560555045

P

of C-T

Flow Rate(LPM)

0.5

(bar

)

(bar

)

(bar

)

lpm

lpm

lpm


CMJ60Auxiliary Valves’ Characteristic

Static Characteristic Dynamic Characteristic

Mainreliefvalve

Overloadreliefvalve

Holdingvalve

0 5 10 15 20 25 30 35 40 45 50

280

240

200

160

120

80 40

0

Pres

sure

(bar

)

Flow rate(lpm)0 1 2 3 4 5 6 7 8 9 10

280

240

200

160

120

80 40

0

80

70

60

50

40

30 20

10

0

Time(sec)

Pres

sure

(bar

)

Flow

rate

(lpm

)

Pressure

Flow rate

280

240

200

160

120

80 40

0

Flow rate(lpm)0 2 4 6 8 10 12 14 16 18 20

Pres

sure

(bar

)

0 1 2 3 4 5 6 7 8 9 10

80

70

60

50

40

30 20

10

0

Pres

sure

(bar

)

Time(sec)Fl

ow ra

te(lp

m)

Pressure

Flow rate

280

240

200

160

120

80 40

0

0 5 10 15 20 25 30 35 40

280

240

200

160

120

80 40

0

Pilot pressure(bar)

Wor

k pr

essu

re(b

ar)

Pressure

Pilot signal

Time(sec)

Pilo

t sig

nal p

ress

ure(

bar)

Wor

k pr

essu

re(b

ar)

280

240

200

160

120

80 40

00 1 2 3 4 5 6 7 8 9 10

40

35

30

25

20

15 10

5

0

Note:Above configurations are for mini excavator applications. All other configuration, please consult AP product marketing.


CMJ8080L/min

Schematic of typical mini excavator application

(2- 1.8)

( 1.5)

P3T2

a9

A9B9 S

win

g

b9

b8

Dr 1

(Down)

(Up)a8(Rod)A8(Head)B8

D/b

lade

PA

PP

PT

A7

a7

B6

A6a6

(Head)

(Rod)

(Head)

(Dump)

(Breaker)(Breaker)

B5A5

a5

P2

P1

a4A4B4

a3

A3Dr 2Pi 2

B3

a2A2B2

a1

A1

B1

(Up)

(Head)

(Dump)

(Rod)

(Rod)(Head)

(Dump)

(Rod)

(Head)T1T3

Arm 2

Bucket

Boom 1

Trav

el /

R

Travel / L

Arm 1

Tr-st

(23±2 Bar)

(23±2 Bar)

(Cro

wd

)(C

row

d)

b1

b2

(Down)b3

b4

b5

b6

(Bo

om

2)

(2- 2.3)

b7(Crowd)

So

l V/V

fo

r b

reak

er

(Crocking 20.7 Bar)(End 26 Bar) ( 0.6)

B7


13.5

478

4- 11 THRUC/Bore 22

70 60

Name Plate

3.0

3.0

41.5

61.5

69.5

77.5

102.0

13.5

Approximotely 90 mm(maintenance clearance of relief v/v)

7060

152

76 76

166 137

70 60

7060

540 478

38

37

38

38

38

38

38

38

38

38

38

38

T3T1

A1 B1

A2 B2

B3S

A3

B4

P1

A4

P2

B5A5

B6A6

PP

B8A8

B9A9

B7A7

P3T2

Approximately 230 mm

(Maintenance clearance od main spool)

Approximotely 90 mm(Maintenance clearance of relief V/V)

CMJ8080L/min

Installation, mm


CMJ80Specifications and Spool Types

Section schematic function - Hydraulic pilot control

Travelling straight section (Mini excavator)

AseparatedTravellingStraightsectionisusedtocombineflowofP3toP1andP2circuitswhenTravellingStraightfunctionisactivated.Toincreasetravelspeed.

1.HydraulicallyOperated,3-PositionSpool.

3.HydraulicallyOperated,3-PositionSpoolwhichdoesnothaveReturn(A->TorB->T)line.

2.HydraulicallyOperated,3-PositionSpoolwhichisopenedtoTfromAandBportinneutralcondition.

P B A T

pa

pb

BY TP

P B A T

pa

pb

TP

P B A T

BY

pa

pb

TP

PA

PP

PT

Dr 1


CMJ80Exploded View

Pressure drop curve

P

P12

10

2

4

6

8

40353025201510500

6560555045

P

70 8075

of P-T Neutral Flow

Flow Rate(LPM)

P

P

16

14

12

2

4

6

8

10

4035302520151050

0

6560555045

of P-C

Flow Rate(LPM)

P

18

P

P7

6

5

1

2

3

4

40353025201510500

6560555045

of C-T

Flow Rate(LPM)

P

70 75 80

(bar

)

(bar

)

(bar

)

lpm

lpm

lpm


CMJ80Auxiliary Valves’ Characteristic

Static Characteristic Dynamic Characteristic

Mainreliefvalve

Overloadreliefvalve

Holdingvalve

280

240

200

160

120

80 40

00 5 10 15 20 25 30 35 40 45 50

Pressure

Flow rate(lpm)

Pres

sure

(bar

)

0 1 2 3 4 5 6 7 8 9 10

80

70

60

50

40

30 20

10

0

280

240

200

160

120

80 40

0

Time(sec)

Pres

sure

(bar

)

Flow

rate

(lpm

)

Pressure

Flow rate

0 2 4 6 8 10 12 14 16 18 20

280

240

200

160

120

80 40

0

Pressure

Flow rate(lpm)

Pres

sure

(bar

)

Pressure

Flow rate

80

70

60

50

40

30 20

10

0

280

240

200

160

120

80 40

00 1 2 3 4 5 6 7 8 9 10

Time(sec)Fl

ow ra

te(lp

m)

Pres

sure

(bar

)

Pressure

0 5 10 15 20 25 30 35 40

280

240

200

160

120

80 40

0

Pilot pressure(bar)

Wor

k pr

essu

re(b

ar)

Pressure

Pilot signal

280

240

200

160

120

80 40

0

40

35

30

25

20

15 10

5

00 1 2 3 4 5 6 7 8 9 10

Pilot pressure(bar)

Wor

k pr

essu

re(b

ar)

Pilo

tsig

nal p

ress

ure(

bar)

Note:Above configurations are for mini excavator applications. All other configuration, please consult AP product marketing.


Notes


© 2013 Eaton CorporationAll Rights Reserved Document No. E-VLMD-MC003-E2January 2013

Eaton Hydraulics Group USA14615 Lone Oak RoadEden Prairie, MN 55344USATel: 952-937-9800Fax: 952-294-7722www.eaton.com/hydraulics

EatonHydraulics Group EuropeRoute de la Longeraie 71110 MorgesSwitzerlandTel: +41 (0) 21 811 4600Fax: +41 (0) 21 811 4601

Eaton Hydraulics Group Asia PacificEaton Building4th Floor, No.7 Lane280 Linhong Rd. Changning DistrictShanghai 200335ChinaTel: (+86 21) 5200 0099Fax: (+86 21) 2230 7240

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