Count on the hydraulics expert - Al-Bahar · PUMP TO WORKPORT PRESSURE DROP ANTI-DRIFT VALVE PRESSURE DROP FLOW RATE (LPM, GPM) TE (LPM, GPM) Without Anti-drift check With Anti-drift

3PC Directional Control Valves

7 Tractor Road, Jurong TownSingapore 627968Tel: 65.6.662.8345Fax: 65.6.662.8347

Count on the hydraulics expert

Caterpillar has been

designing hydraulic

components and systems

for more than 50 years.

Our rugged, dependable

components make

progress possible around

the world. Now we’re

offering our hydraulics

expertise to you.

One of the reasons for our long-term success is that we believe a component is only as effective as the system within which it operates. That means we consider the overall function of the system before we design any single part of it. It’s an approach that helps us ensure durability and performance throughout the life of a machine.

It’s also an approach that promotes flexible solutions to a variety of application challenges at the component level.

Cat® 3PC Valves are a great example. Depending on their configuration, priority can be assigned to one function over another. Their sectional design

allows valves to be configured with two to nine sections. This offers

great versatility, giving you the ability to specify a valve that perfectly matches the demands of your application.

System functions, like ride control, anti-drift, and pilot supply, can be incorporated into the valve allowing you to reduce hydraulic lines in the system. Integration reduces the need for add-on valves while improving response.

2

3PC Valve overview ............................................................... 2-3

General specifications ..............................................................4

C3PC (Compact) Valve

Sectional view .....................................................................6

Dimensions ..........................................................................7

Charts ...................................................................................8

S3PC (Small) Valve

Sectional view ...................................................................10

Dimensions ........................................................................11

Charts .................................................................................12

M3PC (Medium) Valve

Sectional view ...................................................................14

Dimensions ........................................................................15

Charts ........................................................................... 16-17

Building to your requirements ...............................................18

Appendix

Glossary .............................................................................20

Schematics .................................................................. 21-23

Other specifications and options ...................................24

How to obtain a quote ......................................................25

3PC valve inquiry form ............................................................26

C3PC ordering example ..........................................................27

Ordering details .................................................................. 28-30

Cat 3PC Valves

• Closed-center and load-sensing features improve fuel efficiency

• Available integrated ride control

• Priority control of functions is offered

• Proportional flow is shared among sections

• Five spool configurations are available

• Internal anti-drift valves and pilot supply eliminate external lines

• Inlet manifold options support fixed and load-sensing pumps

• Low hysteresis and high repeatability provide dependable performance

• Multiple port types and sizes offer greater design flexibility

• Relief valves are available for work ports, main or margin

• Hydraulic and electro-hydraulic actuation available

3

Table of contents

3PC general specifications/options

4

General Information C3PC S3PC M3PC

Pump Port: 135 (35) Pump Port: 280 (75) Pump Port: 550 (145)

Maximum Flow LPM (GPM) Work Port: 120 (32) Work Port: 250 (65) Work Port: 450 (120)

Maximum Pressure Rating kPa (psi) 24,100 (3500) 34,500 (5000) 34,500 (5000)

Maximum Number of Possible Sections 9 5 5

Ride Control Availability N/A Yes Yes

Standard Ports

SAE No. 16 1-1/4" (opt. 1-1/2")

Pump Port Size SAE No. 16 (opt. 1" Code-62 4-bolt flange) Code-62 4-bolt flange

SAE No. 20 1-1/2" (opt. 2")

Tank Port Size SAE No. 16 (opt. 1-1/4" Code-61 4-bolt flange) Code-61 4-bolt flange

LS Output Port Size SAE No. 6 SAE No. 6 SAE No. 6

SAE No. 8 SAE No. 16

Work Port Size (optional No. 10) (opt. 1" Code-62 4-bolt flange) 1-1/4" Code-62 4-bolt flange

Optional Ports

Pilot Drain Port Size Optional—SAE No. 6 Optional—SAE No. 6 Optional—SAE No. 6

Pilot Supply Port Size Optional—SAE No. 6 Optional—SAE No. 6 Optional—SAE No. 6

Pump Gage Port Size Optional—SAE No. 8 Optional—SAE No. 6 Optional—SAE No. 6

Tank Gage Port Size N/A Optional—SAE No. 6 Optional—SAE No. 6

Pilot Accumulator Port Size Optional—SAE No. 6 Optional—SAE No. 6 Optional—SAE No. 6

LS Input Port Size Optional—SAE No. 6 Optional—SAE No. 6 Optional—SAE No. 6

Optional Cartridge Valves

LS Bleed Valve & Orifice Yes Yes N/A

Pilot On/Off Solenoid Yes Yes Yes

Pilot Check Valve Yes Yes Yes

Pressure Reducing Valve Yes Yes Yes

Main Relief1 N/A N/A Yes

Margin Relief/Fixed Pump Unloading1 N/A N/A Yes

Optional Work Port Cartridges

Relief Valve with Anti-Cavitation Yes Yes Yes

Relief Valve Yes Yes Yes

Anti-cavitation Yes Yes Yes

Anti-Drift Valve Yes Yes Yes

Spool Options

Standard Yes Yes Yes

Motor Yes Yes Yes

4-Position Float Yes Yes Yes

Regen N/A Yes Yes

Swing N/A Yes Yes

1It is not possible to have both a Main Relief and a Margin Relief in a valve.

C3PC Valve

5

Maximum Flow LPM (GPM)

Pump Port: 135 (35)Work Port: 120 (32)

Maximum Pressure Rating kPa (psi)

24,100 (3500)

6

C3PC section

1 1

2, 8

3

4956

7

8

Legend

1. Work Ports2. Line Relief and/or Anti-Cavitation Valve3. EH Solenoid4. Main Spool5. Load Sense Signal Check Valve

6. Valve Body7. Centering Spring Housing8. Anti-Drift Valve9. Pressure Compensator/Pump Check

7

3

7

C3PC dimensions(Dimensions in millimeters)

8

C3PC Charts

20,000

15,000

10,000

5,000

20,000

15,000

10,000

5,000

0 0

25 50 756.6 13.2 19.8 1.3 2.6 4 6.65.3

TYPICAL LINE RELIEF PERFORMANCE

FLOW RATE (LPM, GPM)

725

1450

2175

2900

PRES

SUR

E (k

Pa, p

si)

0 5 10 15 20 25

TYPICAL LOAD SENSE RELIEF PERFORMANCE


725

1450

2175

2900

PRES

SUR

E (k

Pa, p

si)

PRES

SUR

E (k

Pa, p

si)

0 256.6 13.2 19.8

50 75

4000

3000

ANTI-DRIFT VALVE PRESSURE DROP


5858 kPa Load60º C Oil

2000

1000 145

290

435

580

0

PRES

UR

E (k

Pa, p

si)

2500

2000

PUMP TO WORKPORT PRESSURE DROP

1500

1000

500 72.5

145

217.5

290

362.5

00 25

6.6 13.2 19.850 75


11

S3PC Valve

9




34,500 (5000)

10

S3PC Valve

1 1

2

3

4

8

5

6

7

Legend

1. Work Ports2. Line Relief and/or Anti-Cavitation Valve3. Pilot Port/Solenoid Location4. Main Spool

5. Valve Body6. Spring Housing7. Anti-Drift Valve8. Pressure Compensator/Pump Check

2

6

3

11

S3PC dimensions(Dimensions in millimeters)

600

500

400

300

200

10014.5

29

43.5

58

72.5

87

00

1000 200 300 400100 26.4 52.8 89.2 105.6 26.4 52.8 89.2 105132

200 300 400 500

5000

PUMP TO WORKPORT PRESSURE DROP ANTI-DRIFT VALVE PRESSURE DROP

FLOW RATE (LPM, GPM) FLOW RATE (LPM, GPM)

Without Anti-drift checkWith Anti-drift check

PRES

SUR

E (k

Pa. p

si)

PRES

SUR

E (k

Pa. p

si)



4000

3000

2000

1000

290

435

580

725

145

0

PRES

SUR

E (k

Pa, p

si)

00

205.3 10.6 18.9 21.1 26.4 31.7 37 42.3 47.6 52.3

40 60 80 100 120 140 160 180 200

17,250

20,700

24,150

27,600

31,050

34,500

3,450500

1000

1500

2000

2500

3000

3500

4000

4500

5000

6,900

10,350

13,800

1 Function2 Functions3 Functions

30,000

25,000

20,000

15,000

10,000

5,000

35,000

725

1450

2175

2900

3625

4350

5075

0 0

.6 .8.2 .4 1.0


TIME (SEC.)

PRES

SUR

E (k

Pa, p

si)

12

S3PC charts

13

M3PC Valve




34,500 (5000)

14

M3PC Valve

1 1

2

3

4

9

56

7

8

Legend

1. Work Ports2. Line Relief and/or Anti-Cavitation Valve3. EH Solenoid4. Main Spool5. Load Sense Signal Resolver

6. Valve Body7. Spring Housing8. Anti-Drift Valve9. Pressure Compensator/Pump Check

3

7

2

15

M3PC dimensions(Dimensions in millimeters)

M3PC charts

16

2000

1500

1000

50072.5

725

1450

2175

2900

145

217.5

290

050

13.2 26.4 39.6 52.8 660 100 150 200 250100

26.4 52.8 79.3 105.7 132.10 200 300 400 500

2500

3000PUMP TO WORKPORT PRESSURE DROP ANTI-DRIFT PRESSURE DROP




With Anti-driftWithout Anti-drift

PRES

SUR

E (k

Pa, p

si)

PRES

SUR

E (k

Pa, p

si)

2000

1500

1000

500 72.5

145

217.5

290

362.5

435

0

20,000

15,000

10,000

5,000

35,000

30,000

25,000

10,000

15,000

20,000

5,000

0 0

150 2005013.2 26.4 39.6 52.8 66 79.3 92.5

100 250 300 350


PRES

SUR

E (k

Pa, p

si)

PRES

SUR

E (k

Pa, p

si)

725

1450

2175

2900

3625

4350

5075

0 .6 .8.2 .4 1.0


TIME (SEC.)

17

M3PC charts

1000

400

600

800

20029

58

87

116

145

00 50

13.2 26.4 39.6 52.8 66 79.3100 150 200 250 300

TYPICAL PERFORMANCE FOR VALVES CONTAINING ANTI-CAVITATION


PRES

SUR

E D

RO

P (k

Pa, p

si)

PRES

UR

E D

RO

P (k

Pa, p

si)

0 307.9 23.8 39.6 55.5 71.3

90 150 210 270

TYPICAL MARGIN RELIEF PERFORMANCE


3000 kPa Load

30,000

40,000

50,000

10,0001450

2900

4350

5800

7250

20,000

0

With reliefWithout relief

Building to your requirements

18

The toughness and durability of every Cat component begins with innovative engineering. Utilizing sophisticated processes such as finite element analysis, computational fluid dynamics and a proprietary system simulation tool, components are designed to meet the challenges of the most demanding applications, and the harshest of working environments.

Caterpillar’s global manufacturing capabilities include facilities dedicated to hydraulic valve manufacturing. Our manufacturing materials and processes meet or exceed ASTM, DIN, ISO and SAE standards. We follow the 6 Sigma methodology, which provides an integrated, disciplined, and proven approach for delivering exceptional quality, with an enhanced lifecycle value.

With a reputation for building rugged and reliable equipment, Caterpillar has the production facilities, technical capabilities, testing and quality processes necessary to produce valves to meet your application requirements.

Caterpillar can incorporate enhanced technologies such as electrohydraulics or programmable hydraulic systems. In addition, systems can be designed to include pumps, motors, cylinders, fans, brakes, steering systems, hydrostatic transmissions, joysticks and much more—enabling you to meet your customers’ unique requirements.

Appendix

19

Appendix

Anti-Cavitation: A cartridge valve which passes flow from tank to the work port in order to replenish or “make-up” voided volume of oil in an actuator connected to the work port.

Anti-Drift: A cartridge valve used to reduce work port leakage. This valve is typically a pilot operated check valve, which can be used to allow lowering of a gravity load.

Float Spool: A spool designed to connect work ports to the tank (return) port, usually in a fourth position, allowing a cylinder or motor to “float”.

Margin Relief/Fixed Pump Unloading Valve: This cartridge valve opens in response to an external pilot pressure and diverts pump flow directly to tank.

Motor Spool: A spool design which connects both work ports to tank in the neutral state.

Pressure Reducing Valve: A cartridge valve used to maintain a reduced pressure in a portion of the hydraulic circuit, usually for use in a pilot circuit.

Ride Control: A valve to control the connection of lifting cylinders to an accumulator which acts as a shock absorber, allowing the lift cylinders to move independently of the machine while traveling.

Work Ports: Ports on the hydraulic valve where the connections are made to an external circuit, sometimes termed cylinder ports.

Glossary

20

Typical C3PC Schematic

21

Load

Sen

seD

rain

Pum

p

Tank

Pilo

t Dra

inPi

lot S

uppl

y

Inlet

Section 1

Section 2

Section 3

End Plate

Appendix

Typical S3PC Schematic

22

End Plate

Section 3

Ride Control

Bolt On Plate

Section 2

Section 1

Inlet

Pilo

t D

rain

Tank

Pum

p

Load

Sens

e Si

gnal

Load

Sens

e D

rain

Pilot Supply

Pilot Supply

Pilot SupplyPilot Supply

Pilot Supply

Pilot Supply

Accumulator

Accumulator

Load Sense Signal

23

Typical M3PC Schematic

Outlet

Ride Control

Section 2

Section 1

Inlet

Pilot DrainPilot Supply

DuplicateLoad SenseSignal

To Pilot Accumulator From

Filt

er

To F

ilter

Load

Sen

se

Tank

Pum

p

Load

Sens

eSi

gnal

Pilot DrainPilot Supply

Appendix

Other Specifications and Options

24

Approximate Weight (kg) C3PC S3PC M3PC

Inlet 13 18.5 25.8

Outlet 4.9 7.6 24.3

Section

-Pilot 9.2 22.2 36.7

-EH 9.8 22.8 37.3

-Ride Control N/A 23.7 37.7

Options

-LS Bleed Valve 0.1 0.2 N/A

-Pilot On/Off Solenoid 0.2 0.2 0.2

-Pilot Check Valve 0.1 0.1 0.1

-Pressure Reducing Valve 0.3 0.3 0.3

-Main/Margin Relief N/A N/A 0.4

-Relief Valve with Anti-Cavitation 0.3 0.5 0.4

-Relief Valve 0.3 0.5 0.4

-Anti-cavitation Valve 0.1 0.1 0.3

-Anti-drift Valve 0.6 0.5 0.9

Electro-Hydraulic Actuator Specifications

Operating Voltage 12 VDC or 24 VDC

Coil Resistance

-12V Proportional (1.0 A) 12 ohms

-24V Proportional (2.0 A) 12.6 ohms

-12V On/Off 10 ohms

-24V On/Off 38.6 ohms

PWM Frequency

-12V Proportional (1.0 A) 100 Hz, 112 mA Peak to Peak

-24V Proportional (2.0 A) 50 Hz, 200 mA Peak to Peak

Pilot Pressure Requirements

-Minimum Pressure 3100 kPa

-Maximum Pressure 3500 kPa

Flow (minimum) 15 LPM

Fluid & Ambient Temperature -40˚C to 105˚C

Recommended Fluid SAE 10 to SAE 30

Recommended Filtration 10 microns (nominal)

Connector Deutsch

1) Important: Copy the following inquiry form and the order form(s) before providing any information.

2) Using the copied documents, complete the inquiry form and the order form(s) corresponding to the valve series of interest (for compact, C3PC; small, S3PC; and medium, M3PC valves).

3) Fax the inquiry form and the order form(s) to your nearest OEM Solutions location (listed on top of the inquiry form). Provide us with as complete a response as possible—we’ll help you fill in the blanks.

If you have any questions, please contact your nearest OEM Solutions location which can be found on the back cover.

We appreciate your privacy concerns. Your response will be used only to provide you with information on Cat 3PC Valves. It will not be used for any other purpose.

How to obtain a quote

25

Product availability

Please call for availability. Generally, allow 8 to 12 weeks after placing your order for completed valves to be shipped.

3PC valve inquiry form

Fax to: OEM Solutions Group

U.S.A.: 1.309.636.1087 Switzerland: 41.22.849.4075 Singapore: 65.6.662.8347

Contact (please print) __________________________________________________________________________________

Company ____________________________________________________________________________________________

Phone__________________________________________Fax__________________________________________________

E-mail _______________________________________________________________________________________________

Estimated annual usage of product to be equipped with 3PC Valve(s):

____________________________________________________________________________________________________

Describe your vehicle:

Year _________________ Manufacturer __________________________ Model _______________________________

Briefly describe use of vehicle and environment (ex. loading and dumping): _______________________________________

____________________________________________________________________________________________________

____________________________________________________________________________________________________

Customization request: _________________________________________________________________________________

____________________________________________________________________________________________________

____________________________________________________________________________________________________

____________________________________________________________________________________________________

____________________________________________________________________________________________________

____________________________________________________________________________________________________

3PC Valve Information Request

26

C3PC ordering exampleExample Order Detail: After evaluating the 3PC valve family, the customer determines his needs and completes the appropriate order detail below based on the following requirements:

1st spoolPorts Ports Ports

A B A B A B

2nd spool

3rd spool

4th spool

5th spool

6th spool

7th spool

8th spool

9th spool

Spool Symbol

* Pressure in Bar

Actuation

Additional Ports

(—) if not required

(2 columns)

(2 columns)

(2 columns)

Load Sense Input: LPilot Accumulator: APilot Drain: DPilot Supply: SPump Guage: PNone Required: —

Optional FeaturesLoad Sense Bleed & Orifice: LBPilot Shut Off: SOPressure Reducing Valve & Screen: PRNon Required: —

Electro hydraulic: EHydraulic Pilot: H

Flow (lpm)(specify in

10 LPM increments)

Low LeakInternal anti-drift valve (

C3PC ordering detail


A B A B A B

2nd spool

3rd spool

4th spool

5th spool

6th spool

7th spool

8th spool

9th spool

Spool Symbol

* Pressure in Bar

Actuation

Additional Ports


(2 columns)

(2 columns)

(2 columns)





10 LPM increments)


S3PC ordering detail


A B A B A B

2nd spool

3rd spool

4th spool

5th spool

6th spool

7th spool

8th spool

9th spool

Spool Symbol

* Pressure in Bar

Actuation

Additional Ports


(2 columns)

(2 columns)

(2 columns)





10 LPM increments)


M3PC ordering detail

Actuation



Standard(S)

4-Float Pos.(F)

Motor(M)

Tank Port1 1/2” 4 Bolt Flange: S

2” 4 Bolt Flange: 0

Optional FeaturesLoad Sense Bleed & Orifice: LBMain Relief: MRMargin Relief/Fixed pump unloading: MFPilot Shut Off: SOPressure Red Valve: PRNon Required: —

Regen(R)

Swing(W)


A B A B A B

4th spool

5th spool

* Pressure in Bar

(2 columns)

(2 columns)

(2 columns)

2nd spool

3rd spool

Numberof Spools

Load Sensing PressureLimitation (bar)

Spool Symbol

Pump Port

Additional PortsLoad Sense Input: LPilot Accumulator: APilot Drain: DPilot Supply: SPump Gage: PTank Gage: TNone Required: —

2-5

Ride ControlYes: YNo: N

1 1/4” 4 Bolt Flange: S1 1/2” 4 Bolt Flange: 0


10 LPM increments)


31

Warranty

Legal Notice

The information in this publication, including text, images, and links, is PROVIDED “AS IS” BY CATERPILLAR INC. SOLELY AS A CONVENIENCE TO ITS DEALERS AND CUSTOMERS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. Caterpillar Inc. assumes no responsibility for errors or omissions in this publication or other documents which are referenced by or linked to this publication. This publication could include technical or other inaccuracies, and not all products or services referenced herein are available in all areas. Changes are periodically added to the information, and Caterpillar may change the products or services described in this publication at any time. Contact your local Caterpillar® dealer for further information before relying on any information contained herein.

© 2004 CaterpillarAll Rights ReservedPrinted in USAWECC1000

100 N.E. Adams StreetPeoria, IL U.S.A. 61629-9310Phone: 1.309.636.1100Fax: 1.309.636.1087E-mail: [email protected]

P.O. Box 60001211 Geneva 6, SwitzerlandPhone: 41.22.849.4217Fax: 41.22.849.4075Telex: 413323

Room 1701 China Life TowerNo. 16 Chaoyangmenwai AvenueChaoyang District, Beijing 100020Tel: 011.86.10.85253636 ext. 284

7 Tractor Road, Jurong TownSingapore 627968Tel: 65.6.662.8345Fax: 65.6.662.8347

Rm 805, Aetna Tower107 Zun Yi RoadShanghai, China P.C. 200051Tel: 86.21.6219.2723 ext.131Fax: 86.21.6237.5494Mobile: 86.139.0175.1749

AIG Aoyama Building 8F2-11-16 Minami Aoyama,Minato-kuiTokyo, Japan 107-0062Tel: 03.5786.3858Fax: 03.5786.3860

1 Caterpillar DrivePrivate Mail Bag 4TullamarineVictoria 3043 AustraliaTel: 61.3.9953.9365Fax: 61.3.9953.9530

OEM Solutions Group

Documents

Count on the hydraulics expert - Al-Bahar · PUMP TO WORKPORT PRESSURE DROP ANTI-DRIFT VALVE PRESSURE DROP FLOW RATE (LPM, GPM) TE (LPM, GPM) Without Anti-drift check With Anti-drift