Vickers Valves Pilot Operated Directional Valvesvickers.sh.cn/pdfs/500702en1197a.pdf · Valves Pilot Operated Directional Valves

5007.02/EN/1197/A

DG3V-8; 700 l/min (185 USgpm) 350 bar (5000 psi)DG5V-8; 700 l/min (185 USgpm) 350 bar (5000 psi)NFPA D08, ISO-4401-08, CETOP 8

Vickers®

Valves

Pilot Operated Directional Valves

Vickers, Incorporated 1997All Rights Reserved

Introduction

General DescriptionThe Size 8 Directional Control Valveserves as a control valve package. Itoffers directional control, pilot pressurereducers, pilot chokes, and main stagestroke adjustment to control the flow.

The valves are generally used to controllarge flows up to 700 l/min (185 USgpm)at 350 bar (5000 psi) and provide lowpressure drops. The range includes:

� DG3V-8 - remote pilot operated valve.

� DG5V-8-S - DG4V-3S-60 standardperformance D03 pilot valve 100 bar(1450 psi) tank line rating.

� DG5V-8-H - DG4V-3-60 highperformance D03 pilot valve 210 bar(3000 psi) tank line rating.

Each valve contains a mainstage spoolwhich is positioned in the valve byspecial arrangement. The fourarrangements are:

� Spring offset - For single stageoperation, one spring returns spool toan offset position. For two–stageoperation, springs and washers areremoved from main stage and offsetaction is obtained from pilot valve.

� Spring centered - Spring and washerare located on both ends of mainstage spool to control centering.

� Pressure centered - Centering springsare used in addition to pilot pressure,to provide positive centering shouldpilot pressure fail.

� No–spring detented - Springs andwashers are provided so that in theevent of pilot pressure failure, themain spool will spring center.

Features and Benefits� A ‘‘mini-system’’ capability with wide

variety of spool and springarrangements, stroke and pilot chokeadjustments, integral check valves andport orifices.

� High force solenoids and centeringsprings assure consistent shiftingthrough a wide range of pressure andsilting extremes.

� Provides maximum strength at lowpressure drop; in a small package,capable of high flow and highpressure.

� Suitable for demanding industrial ormobile applications by providing forreliable operations.

� Endurance tested to 10 million cyclesand fatigue tested without failure toensure highest reliability.

� Fatigue testing performed to NFPAspecifications to ensure the highestreliability in applications requiring highflows and pressure.

� Solid cast body and cored passagesfor maximum strength and minimalpressure drop.

� Electrical options including coil types,connections, and wiring housingsallow full compatibility and reliableperformance in any systemapplication.

� Plain, waterproof, and lockablemanual override options are availableto facilitate system troubleshooting orservicing.

� The DG3V and DG5V are 100%interchangeable with previous H8design valves.

Service InformationRefer to specific Vickers parts drawingfor service parts information. Order by literature number.DG3V-8 5007.03/EN/0196/S. . . . . . . DG5V-8-*S 5007.04/EN/0196/S. . . . DG5V-8-*H 5007.04/EN/0196/S. . . .

3

Contents

DG3V-8 Remote Pilot Operated Directional ValvesModel Code 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model Description/Performance Characteristics 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Spool Type and Center Position 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Curves 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Response Time 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation Dimensions 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Features 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DG5V-8 Pilot Operated Directional ValvesModel Code 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model Description/Performance Characteristics 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Spool Type and Center Position 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Curves 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shift Response Times 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pilot Valves 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation Dimensions 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Features 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Information 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting Surface 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Application Data 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4

DG3V-8 Remote Pilot Operated Directional Valves

Model Code

2 3 87 91 10

Special Seals

(Omit if not required.)F3 - Seals for fire resistant fluids.F6 - Seals for water glycol.

Directional Control Valve

DG3V - Subplate mounting; pilotoperated-remote operator. Pressurerating 350 bar (5000 psi) for all ports.(See minimum pilot pressurerequirements on page 6.)

Valve Size

8 - Valve size CETOP 8, NFPA D08

Gauge Ports

Blank - .4375-20 UNF-2B ThreadB -1/4 BSP Thread

Spool Types

0 - Open to T all ports1 - Open P&A to T, closed B2 - Closed to T all ports3 - Closed P&B, open A to T4 - Tandem P to T, closed crossover6 - Closed P only, open A&B to T7 - Open P to A&B, closed T8 - Tandem P to T, open crossover9 - Open to T all ports over tapers11 - Open P&B to T, closed A

1 31 - Closed P&A, open B to T33 - Closed P, open A&B to T over tapers52 - Closed center, regen. by operator ‘A’521 - Closed center, regen. by operator ‘B’

Spool/Spring Arrangement

Blank - No springA - Spring offset to cylinder ‘A’C - Spring centeredD - Pressure centered

Left Hand Build

L - A Models only, omit if not required.

Fast Response

(Omit for standard low shock models.)X- Not recommended for pilot pressures

above 210 bar (3000 psi).

Spool Control Modifications

(Omit if not required.)1 - Stroke adjustment (both ends)

(available on C & Blank (no spring) models)

2 - Pilot choke adjustment (available on all models)

3 - Pilot choke and stroke adjusters (both ends) (available on C & Blank(no spring) models)

2

3

4

5

6

7

9

7 - Stroke adjusters on cylinder A end only (available on A, C & Blank (no spring) models)

8 - Stroke adjusters on cylinder ‘B’ endonly (available on A, C, & Blank (nospring) models)

27 - If both are required (available on A,C, & Blank (no spring) models)

28 - If both are required (available on AL left hand build, C & Blank (no spring) models)

Check Valve in Pressure Port

(Omit if not required.)K - 0,35 bar (5 psi) checkQ - 2,42 bar (35 psi) checkR - 3,45 bar (50 psi) checkS - 5,20 bar (75 psi) check

Design Number

Subject to change. Installationdimensions remain as shown for designnumbers 10 through 19.

Special Modifications

(Omit if not required.)

8

10

65 11 12

11

4

12

Ratings

Maximum FlowWithoutMalfunction*L/min (USgpm)

MaximumFatigue Pressure (Ports P, A, B & T)bar (psi)

Maximum Operating Pressurebar (psi)

Maximum OperatingPressure (Ports T & Y)

Mounting Pattern

To 700 (185) 350 (5000) 350 (5000) 350 (5000) CETOP 8ISO 4401 Size 8NFPA D08

* See malfunction flow curves on page 7.

5

Model Description/Performance Characteristics

General DescriptionDG3V-8 models are single stage remotepilot operated directional control valves.These valves are generally used tocontrol the direction of flow in a hydrauliccircuit. This in turn would control themovement of a work cylinder or therotation of a fluid motor.

Installation Data

Drain connection must be piped directlyto tank through a surge free line so therewill be no back pressure at this port.

Pressure Centered Models

Designated by ‘‘D’’ under spring/spoolarrangement in model code.

This option provides faster, morepositive spring centering time by use ofpilot pressure to center the spool. Thevalve spool is returned to center positionwhen pilot pressure is applied at bothends of the spool. The centering springsare used in addition to pilot pressure toensure positive centering of spool.

If pilot pressure fails or falls below therequired minimum, the spool will springreturn to the center position. Pilotpressure is not available through theuse of and integral check valve.Pressure centered valves have a drainport ‘‘W’’ and subplate must haveprovisions for this feature.

NotePressure centered valves require apilot valve which directs pilot oil toconnections ‘‘X’’ and ‘‘Y’’ of the valveat the same time pressure centeringis desired. The centering timedepends on the rate of pressure risein the pilot chamber.

Spring Offset Models

Designated by ‘‘A’’ under spring/spoolarrangement in model code.

Spring offset model has an internalspring which returns the spool to offsetposition when the pilot connection ‘‘X’’ isopen to tank. Pilot connection ‘‘Y’’becomes a drain connection and mustbe pioped directly to tank at atmosphericpressure through a surge-free tank line.Back pressure at this connection wouldcause valve to malfunction.

Caution: Spring offsetmodels contain a highassembled spring load.

Call Vickers Service for disassemblyinstructions.

Spring Centered Models

Designated by ‘‘C’’ under spring/spoolarrangement in model code.

A spring and washer arrangement isused on both ends of the spool. Ifcontrol pressure is removed, the valvewill go to center position due to springforce.

No-Spring Models

Designated by a ‘‘Blank’’ underspring/spool arrangement in model code.

When pilot pressure is removed onno-spring models, the spool remains inthe last position attained provided thereis no unusual shock, vibration, pressuretransients and the spool axis is horizontal.

Performance CharacteristicsSpring centered, pressure centered andspring offset models require continuouspilot pressure to maintain shifted position.Spring centered models return valvespool to center position by centeringsprings when pilot pressure fails or fallsbelow minimum requirement.

Port connections are made by mountingthe valves on a subplate or manifoldhaving mounting dimensions whichconform to NFPA-D08/D10(ISO-4401-08/10) pattern.

Shift Times

Shift times are defined as the time frompilot pressure application/removal to thepoint of the start of a pressurerise/decline in appropriate port.

Caution: Flow conditionsof the spring centeredposition must be selected

with care, both for the effect on thedirection of the flow, and the pilotpressure. (The “9” main spool willnot ensure sufficient pilot pressure inthe center position for internal pilotpressure models.)

Pressure centered models: Valvespool is returned to center positionby pilot pressure, when pilotpressure is removed. If pilotpressure fails or falls below therequired minimum, the valve spoolwill spring return to center position.(At spring centered valve flow rates).

Caution: Surges of oil in acommon pilot valve drainline serving these and other

valves can be of sufficient magnitudeto cause inadvertant shifting of thesevalves. This is particularly critical inthe no-spring type valves. Separatedrain lines or a vented drain manifoldwith a continuous downward path totank is necessary. This applies toconnection ‘‘Y’’ on spring offset valveswhere ‘‘Y’’ is piped as a drain forpressure centered models. Drainconnection ‘‘W’’ must be piped directlyto tank through a surge free line sothere will be no back pressure atdrain.

NoteAny sliding spool valve, if held forlong periods of time, may stickand not spring return due to fluidresidue formation and therefore,should be cycled periodically toprevent this from happening.

If used as other than a normal 4–wayvalve, consult your Vickers representative.

Minimum Pilot Pressure RequirementsSpool Type Pilot Pressure bar (psi)p yp

Blank, A, C Models D Models

Closed center 10 (150) P to A: 12 (175)P to B: 21 (300)

Open center 5 (75) P to A: 10 (150)P to B: 10 (150)

6

Spool Type and Center Position


A B

P T

SpoolType

CenterPosition

A B

P T

A B

P T

0

1

2

SpoolType

CenterPosition

A B

P T

4

(ClosedCrossover)

6

7

A B

P T

A B

P T

SpoolType

CenterPosition

9

A B

P T

8

(OpenCrossover)

A B

P T

SpoolType

CenterPosition

11

A B

P T

A B

P T

3

A B

P T

31

A B

P T

33

SpoolType

CenterPosition

52

A B

P T

(Below)

521 (Below)

A B

P T

Graphical Symbols

A B

P T

SPRING OFFSET ‘A’

A B

P T

SPRING CENTERED ‘C’

A B

P T

PRESSURE CENTERED ‘D’

W DRAIN

A B

P TY DRAIN

NO-SPRING

Flow Ratings

Maximum flow without malfunction See malfunction flow curves on page 7.

Maximum fatigue pressure (P, A, B & T ports)� 350 bar (5000 psi)

Maximum operating pressure (P, A, B & X ports) 350 bar (5000 psi)

Maximum operating pressure (T & Y ports) 350 bar (5000 psi)

� The method for verifying the rated fatigue pressure of the complete unit conforms to NFPA/T2.6.1 R1-1991 (Catalog C/90), Fluid Power Systems and Products method for verifying the fatigue pressure rating of the pressure containing envelope.

1. Figures in the pressure drop chart give approximate pressure drop (�P) when passing 473 l/min (125 USgpm) flow (Q) of 35 cSt (164 SUS) fluids(s) having .865 specific gravity.

2. For any other flow rate (Q1), the pressure drop (�P1) will be approximately: �P1 = �P(Q1/Q)2.

3. For any other viscosity(s), the pressure drop (�P), will change as follows:

4. For any other specific gravity (G1), the pressure drop (�P1) will be approximately: �P1 = �P(G1/G).

��

ViscositycSt (SUS)

14(17.5)

20(97.8)

43(200)

54(251)

65(302)

76(352)

85(399)

% of �P(Approx.)

��

7

Curves

Pressure Drop & Malfunction FlowThe following table lists the appropriatepressure drop curve and malfunctionflow curve between ports for each spooltype. Use the following example todetermine pressure drop for a selectedspool.

Example: Find the pressure drop fromP�B for type 7 spool. Using the tablefind numeral 7 in the spool type column.To the right of numeral 7 find thereference curve 2 (from pressure dropcurve chart at bottom of page) underP�B column.

The pressure drop from P�B for type 7spool would be obtained on curve 2.Likewise, the malfunction for numeral 7would be found on curve 1 (frommalfunction flow curve chart at bottom ofpage).

SpoolType

Pressure Drop Curve Number MalfunctionFlowType

P�A B�T P�B A�T P�T In CenterFlow Curve Number

0 2 2 2 2 3 1

1 1 2 1 3 2 3

11 1 3 1 1 3 3

2 1 2 1 1 – 2

3 1 2 1 4 – 2

31 1 3 1 1 – 2

4 4 3 4 2 5 3

6 1 3 1 4 – 1

7 2 2 2 1 – 1

8 4 3 4 2 5 1

9 2 3 2 2 28 bar (400 psid) @ 189 L/min (50USgpm)

4

33 1 3 1 2 – 2

52 2 – 4 4 – 1

521 2 4 4 – – 1

FLOW – USgpm

FLOW – L/min

20 40 60 80 100 120 140 160 180 200

PR

ES

SU

RE

DR

OP

– b

ar

PR

ES

SU

RE

DR

OP

– p

si

0

50

100

150

200

250

300

350

400

450

1

2

34

5

7,0

10,0

17,0

20,0

3,5

0

14,0

24,0

27,5

31,0

76151

227303

379454

530606

681757

Pressure Drop Curves

20 40 60 80 100 120 140160 180

76 227 379 530 681

200

FLOW – L/min

151 303 454 606 757

0

1000

2000

3000

4000

5000

6000 415

350

280

210

140

70

0

4

3

2

1

PR

ES

SU

RE

DR

OP

– p

si

PR

ES

SU

RE

DR

OP

– b

ar

FLOW – USgpm

Malfunction Flow Curves

8

Response Time

Response TimeThe response time shown in the chartsare defined as the time between pilotpressurization/de-pressurization and theinitial change in the inlet port pressure.

0

10

20

30

40

50

60

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

Offset to Offset

Low shock shift

Low shock spring return

Fast response shift

Fast response spring return

Pilot pressure - psi

Pilot pressure - bar35 70 100 140 175 210 280 310 350240

Tim

e -

mse

c

Pilot pressure - bar

0

10

20

30

40

50

60

70

80

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

Center to Offset

Low shock

Fast response

35 70 100 140 175 210 280 310 350240


Tim

e -

mse

c

Spring Centering Times @Rated Flow & Pressure

Spool TypeClosed CenterOpen Center

Time.040 sec..050 sec.


0

100

2040

60

80

Tim

e -

mse

c

120 70 140 210


1000 2000 3000

Standard Low ShockFast Response

Centering Times forPressure Centered Valves

@ Rated Pressure(A to P or B to P)

9

Installation Dimensions

Millimeters (inches)DG3V-8-(C)-*-*-10 Spring Centered Model

164,9 (6.49) 75,0 (2.95)

81,0 (3.19)

‘‘A’’

‘‘C’’

‘‘B’’

‘‘D’’

See pilot chokeadjustment installationfor additionaldimensions not shown.

Gauge ports .4375-20 UNF-2Bthread for .250 O.D. tubing or 1/4 BSPthread

80,9 (3.19)

41,0 (1.61)

53,0 (2.09)

100,7 (3.96)187,3 (7.38)

31,0 (1.22)

130,2 (5.13)

53,2 (2.09)

35,4 (1.39)

70,8 (2.79)

153,0 (6.02)

77,0 (3.03)

46,1 (1.81) 92,1 (3.63)

Mounting bolt holes∅ 13,5 (0.53)6 places

Port B ∅ 25,0 (0.98)

Port A ∅ 25,0 (0.98)

Pilot Pressure Port X

Tank Port ∅ 25,0 (0.98)

Pressure Port∅ 25,0 (0.98) Std. Model∅ 27,3 (1.07) P-Port Check Model

118,5 (4.67)

46,0 (1.81)

35,5 (1.40)

111,0 (4.37)

58,5 (2.30)

Dimension to mountingbolt counterbore hole6-places

∅ 6,4 (0.25) Orientation Pin2-places

6,5 (0.25)

42,5 (1.67)

Pilot Pressure Port Y

Spool Control Modifications ‘‘A’’ Dimension

‘‘B’’ Dimension

‘‘C’’ Dimension

‘‘D’’ Dimension (pilotchoke adjustment)

Without pilot choke or stroke adjustment133 0 (5 23)

265,3 (10.44) 132,6 (5.22) –

Stroke adjustment (both ends)133,0 (5.23)

415,9 (16.37) 208,0 (8.18) –

Pilot choke adjustment 173,0 (6.81) 265,3 (10.44) 132,6 (5.22) 134,2 (5.28)

Stroke adjustment on cyl. ‘A’133 0 (5 23)

208,0 (8.18) –

Stroke adjustment on cyl. ‘B’133,0 (5.23)

340 6 (13 40)132,6 (5.22) –

Pilot choke and stroke adjustment on cyl. ‘A’340,6 (13.40)

208,0 (8.18)

Pilot choke and stroke adjustment on cyl. ‘B’ 173,0 (6.81) 132,6 (5.22) 134,2 (5.28)

Pilot choke and stroke adjustment (both ends)

, ( )

415,9 (16.37) 208,0 (8.18)

, ( )

10

DG3V-8-A(L)-*-*-10 Spring Offset ModelMillimeters (inches)

83,4 (3.28)

194,4 (7.65)

‘‘A’’

‘‘D’’

‘‘C’’

‘‘B’’

Spool Control Modifications ‘‘A’’ Dimension

‘‘B’’ Dimension

‘‘C’’ Dimension

‘‘D’’ Dimension (pilotchoke adjustment)

Without pilot choke or stroke adjustment 132,6 (5.22) –

Without pilot choke or stroke adjustment(left-hand build)

133,0 (5.23) 326,9 (12.87)194,4 (7.65) 134,2 (5.28)

Pilot choke adjustment 173,0 (6.81) 265,3 (10.44) 132,6 (5.22) 134,2 (5.28)

Stroke adjustment on cyl. ‘A’ (left-hand build)133 0 (5 23)

402,3 (15,83) 208,0 (8.18) _

Stroke adjustment on cyl. ‘B’133,0 (5.23)

340,6 (13.40) 132,6 (5.22) –

Pilot choke and stroke adjustment on cyl. ‘A’(left-hand build) 173,0 (6.81) 340,6 (13.40)

208,0 (8.18)134,2 (5.28)

Pilot choke and stroke adjustment on cyl. ‘B’173,0 (6.81) 340,6 (13.40)

132,6 (5.22)134,2 (5.28)

DG3V-8-D-*-*-10 Pressure Centered ModelMillimeters (inches)

‘‘A’’

‘‘D’’

‘‘B’’

193,5 (7.62)

84,9 (3.34)

Pressure Drop Across Check Valve

0 20 40 60 80 100 120 140 160 180 200

75.7151.4

227.1302.8

378.5454.2

529.9605.6

681.3757.0

6,9

13,8

20,7

27,6

34,5

41,4

48,3

00

700

600

500

400

300

200

100

FLOW - USgpm

FLOW - L/min

PR

ES

SU

RE

DR

OP

- b

ar

PR

ES

SU

RE

DR

OP

- p

si

‘‘R ’’ Spring

‘‘S’’ Spring

‘‘K’’ Spring

‘‘Q’’ Spring

11

Optional Features

Integral Check Valves

For internal pilot pressure, an integralpressure port check valve is available.This back pressure will be present atthe cylinder ports. The pilot pressuregenerated is the total of: P→T dropthrough the valve in center condition,pressure drop through the checkvalve, plus the pressure at the tankport.

To prevent load drop, a check valvein the pressure port can be used toprevent reverse flow from a cylinderport to the pressure port.

Pilot ChokeDGMFN-3-Y-A2W-B2W-41

Pilot choke increases the amount oftime to shift the mainstage spool,lowering the possibility of large flowtransients in the circuit. It is adjusted bybacking off locknuts and turningadjusting screws inward to decreaserate of spool travel and outward toincrease spool travel rate. See spoolcontrol modifications in model code.

Stroke Adjustment

Stroke adjustment limits movement ofthe mainstage spool. Backing off thejamnut and turning the adjusting screwinward decreases spool stroke. Seespool control modifications in modelcode.

Pilot Choke

Stroke Adjustment

12

DG5V-8 Pilot Operated Directional Valves

Model Code

Special Seals

(Omit if not required.)F3 - Seals for fire resistant fluids.F6 - Seals for water glycol.

Directional Control Valve

DG5V - Subplate mounting; pilotoperated. Pressure rating 350 bar (5000 psi) for all ports. (See minimumpilot pressure requirements on p. 15.)

Valve Size

8 - Valve size CETOP 8, NFPA D08

Pilot Valve Type

H -CETOP 3, High performanceS -CETOP 3, Standard performance

Reducer Module

See Fast Response restriction.(Omit if not required.)

Gauge Ports

Blank - .4375-20 UNF-2B ThreadB -1/4 BSP Thread

Spool Types

0 - Open center (all ports)1 - Open center (P to A & T) B blocked2 Closed center (all ports)3 - Open center (P & B blocked) A to T4 - Tandem center (P to T) closed

crossover6 - Closed center (P blocked)

A & B to T7 - Open center (P to A & B) T blocked8 - Tandem center (P to T) open

crossover

1 9 - Open center, partial to all ports11 - Open center (P to B & T) A blocked31 - Closed center (P & A blocked)

B to T33 - Closed center, bleed A & B to T52 - Closed center (All ports) regen.

towards workport A521 -Closed center (All ports) regen.

towards workport B

Spool Spring Arrangement

A - Spring offset to ‘A’ portB - Spring centered, with solenoid ‘A’

removedC - Spring centeredD - Pressure centeredF - Spring offset to ‘A’ port, shift to

centerN - No spring detented (pilot valve

only)

Left Hand Build

L - Single solenoid models only, omit if not required.

Manual Override Options

Blank - Plain override in solenoid ends only

H - Waterproof override in solenoid ends only

H2 - Waterproof override in both ends ofsingle solenoid

P2 - Plain override in both ends of singlesolenoid

Y - Lockable manual override in solenoid ends only (DC models only)

Z - No override in either end

2

3

4

5

6

7

9

8

10

11 Fast Response

X - Not recommended for pilot pressures above 210 bar (3000 psi).(Omit for standard low shock models.)

When the standardperformance pilot is selectedand pilot pressure is above

3000 psi, the reducer module isrequired to limit high drain line pressuretransients generated during shifting.


(Omit when not required)1 - Stroke adjustment (both ends)

(not available on D models)2 - Pilot choke adjustment (available

on all models)3 - Pilot choke and stroke adjusters

(both ends) (not available on Dmodels)

7 - Stroke adjusters on A port end only (not available on D models)

8 - Stroke adjusters on B port end only(available on all models)

27 - 2 and 7 combined (not available onD models)

28 - 2 and 8 combined (available on all models)

External Pilot Pressure

E -External pilot pressure. Omit for internal pilot pressure models.

Internal Pilot Drain

T - Internal pilot drain to ‘T’ port. Omit for external pilot drain models.

Check Valve in Pressure Port

(Omit if not required)K - 0,35 bar (5 psi) checkQ - 2,42 bar (35 psi) checkR - 3,45 bar (50 psi) checkS - 5,20 bar (75 psi) check

12

13

14

2 3 4 75 81 10 11 12 13 14 15 16 17 18 199 262021 22 23 24 25 276 28

15

�

13

Model Code (continued)

19

20

18

21

17

16 Solenoid Energization Identity

Blank - Standard arrangement for ANSIB93.9 (i.e. energize solenoid A tofollow flow P to A).V - Solenoid identification determinedby position of solenoid (i.e. solenoid Aat port A end/solenoid B at port B end).

Note4 and 8 type spools are always V.Solenoid energization identity isindependent of mainstage porting.

Heading Electrical Flag Symbol

M - Features and options for pilot valve.

Pilot Valve Monitoring Switch

(Omit if not required)S3- Limit switch normally open, wired to

electrical connector with PA/PB/PA5(H piloted models only)

S4- Limit switch normally closed, wired to electrical connector with PA/PB/PA5(H piloted models only)

S5- Limit switch - FW, FJ(H piloted models only)

S6- Position switch with U coils(H piloted models only)

Coil Type

F - Flying lead (required for wiring housing option)

KU - Top exit flying leadP - Plug in SP1- Single 6.3mm spade SP2- Dual 6.3mm spade U - ISO 4400 (DIN 43650)X1 - Flameproof solenoids

BASEEFA/CENELEC (S piloted models only)

X2 - Explosion proof solenoids CSA/UL (S piloted models only)

X3 - Explosion proof solenoids BASEEFA ExS (S piloted models only)

Electrical Connections

(F type coils only, omit if not required)PA - Insta–plug, male receptacle onlyPB - Insta–plug, male and female

receptaclePA3- 3–pin connectorPA5- 5–pin connectorT - Wired terminal block (wiring

housing option also required)

Wiring Housing

W - 1/2” NPT threaded connectionJ - 20mm threaded connectionG - 1/2” BSP threaded connection

Electrical Options

(Omit if not required)U-type coils only1- Fitted connector2- Fitted connector and variable

grommet6- Fitted connector with lights

Solenoid Indicator Lights

(Omit if not required)

Surge Suppressor/Damper

(DC voltages only, omit if not required)D1- Encapsulated diode (industrial applications)D2- Encapsulated diode (mobile

applications)D7- Encapsulated transzorb

Coil Identification Letter

See electrical information on page 25for voltages available. Others availableupon request.

Pilot Valve Port Orifices


Design Number

Special Modifications


22

25

26

23

24

27

28

Ratings

Maximum FlowWithoutMalfunction*L/min (USgpm)

MaximumFatigue Pressure (Ports P, A, B & T)bar (psi)

Maximum Operating Pressurebar (psi)

Maximum OperatingPressure (Ports T & Y)

Mounting Pattern

To 700 (185) 350 (5000) 350 (5000) 350 (5000) CETOP 8ISO 4401 Size 8NFPA D08

* See malfunction flow curves on page 16.

14

Model Description/Performance Characteristics

Model DescriptionDG5V-8 models are two-stage directionalcontrol valves having an integrallymounted wet armature solenoid pilotvalve. These valves are generally usedto control the movement of a workcylinder or the rotation of a fluid motor.


Designated by ‘‘D’’ under spring/spoolarrangement in model code.

This option provides faster, morepositive spring centering time by use ofpilot pressure to center the spool. Thevalve spool is returned to center positionwhen pilot pressure is applied at bothends of the spool. The centering springsare used in addition to pilot pressure toensure positive centering of spool.

If pilot pressure fails or falls below therequired minimum, the spool will springreturn to the center position. Pilotpressure is not available through the useof and integral check valve. Pressurecentered valves have a drain port ‘‘W’’and must have provisions for this feature.

NotePressure centered valves require apilot valve which directs pilot oil toconnections ‘‘A’’ and ‘‘B’’ of the valveat the same time pressure centeringis desired. The centering timedepends on the rate of pressure risein the pilot chamber.

Spring Offset ModelsDesignated by ‘‘A’’ under spring/spoolarrangement in model code.

Spring offset model has an internalspring which offsets the spool when pilotconnection ‘‘X’’ is vented to tank. Whenpressure is removed, the spring is usedto return the spool to an offset position.

Caution: Spring offset modelscontain a high assembledspring load. Call Vickers

Service for disassembly instructions.

Spring Centered Models

Designated by ‘‘C’’ under spring/spoolarrangement in model code.

A spring and washer arrangement isused on both ends of the spool. If controlpressure is removed, the valve will go tocenter position due to spring force.

No-Spring Models

Designated by a ‘‘Blank’’ underspring/spool arrangement in model code.

When the solenoid is de-energized, thespool returns to the last position attained.

Performance CharacteristicsSpring centered, pressure centered andspring offset models require continuouspilot pressure to maintain shiftedposition. Centering springs on springcentered and pressure centered modelsreturn the valve spool to the centerposition pilot pressure fails or falls belowminimum requirement.

Shift Times

Shift times are defined as the time fromsolenoid energization/de-energization tothe point of the start of a pressurerise/decline in appropriate port.

Caution: Flow conditionsof the spring centeredposition must be selected

with care, both for the effect on thedirection of the flow, and the pilotpressure. (The “9” main spool willnot ensure sufficient pilot pressure inthe center position.)

Pressure centered models: Valvespool is returned to center positionby pilot pressure, when pilot pressureis removed. If pilot pressure fails orfalls below the required minimum,the valve spool will spring return tocenter position. (At spring centeredvalve flow rates).

Caution: Surges of oil in acommon tank line servingthese and other valves

can be sufficient enough to causeinadvertent shifting of these valves.This is very critical in the no-springdetented valves. Separate tank linesor a vented manifold with a continuousdownward path to tank is necessary.

NoteAny sliding spool valve, if held forlong periods of time, may stickand not spring return due to fluidresidue formation and therefore,should be cycled periodically toprevent this from happening.

Shifting Action

The pilot valve solenoids of springcentered, pressure centered, and springoffset models must be energizedcontinuously to keep the main stagespool in the shifted position. No-springdetented models only need to beenergized momentarily (forapproximately 0.1 second).

Spring centered and pressure centeredmodels return the valve spool to thecenter position when both solenoids arede-energized or pilot pressure fails orfalls below minimum requirements.Spring offset models return the spool tothe offset position by pilot pressurewhen the solenoid is de-energized.

When no-spring detented models arede-energized, the pilot and main spoolsremain in their last position as long asthere are no unusual shock, vibration, orpressure transients, and the spool axisis horizontal. If pilot pressure fails orfalls below minimum requirements, themain spool will spring center (at springcentered flow rates), but will not drift to areversal of flow position. The pilot stagewill remain in the detented position.

When used as other than a normal4–way valve, consult your Vickersrepresentative.

Minimum Pilot Pressure Requirements (when operating at 350 bar (5000 psi) maximum)Spool Type Pilot Pressure bar (psi)p yp

A, B, C, F, N Models D Models

Closed center 10 (150) P to A: 12 (175)P to B: 21 (300)

Open center 5 (75) P to A: 10 (150)P to B: 10 (150)

�

�

�

15



A B

P T

SpoolType

CenterPosition

A B

P T

A B

P T

0

1

2

SpoolType

CenterPosition

A B

P T

4

(ClosedCrossover)

6

7

A B

P T

A B

P T

SpoolType

CenterPosition

9

A B

P T

8

(OpenCrossover)

A B

P T

SpoolType

CenterPosition

11

A B

P T

A B

P T

3

A B

P T

31

A B

P T

33

SpoolType

CenterPosition

52

A B

P T

521

A B

P T

Graphical Symbols

A B

P T

SPRING OFFSET ‘A’

A B

P T

SPRING CENTERED ‘C’

A B

P T

PRESSURE CENTERED ‘D’

W DRAIN

A B

P T

NO-SPRING DETENTED ‘N’

A B

P T

Y DRAIN

SPRING OFFSETSHIFT TO CENTER ‘F’

A B

P T

b

SPRING CENTEREDSINGLE SOLENOID ‘B’

Y DRAIN

Y DRAIN

Flow RatingsMaximum flow without malfunction See flow chart on page 16

Maximum fatigue pressure (P, A, B & T ports)� 350 bar (5000 psi)

Maximum operating pressure (P, A, B & X ports) 350 bar (5000 psi)

Maximum operating pressure (T & Y ports)� 350 bar (5000 psi)

� The method for verifying the rated fatigue pressure of the complete unit conforms to NFPA/T2.6.1 R1-1991 (Catalog C/90), Fluid Power Systems and Products method for verifying the fatigue pressure rating of the pressure containing envelope.� Internal drain models drain the pilot valve through the tank port of the mainstage. External drain models drain the pilot valve through the

‘‘Y’ port of the mainstage. To provide proper operation without malfunction, the pilot pressure must always exceed tank or drain line pressure by the minimum pilot pressure required per valve and spool type (see charts on page 16). Tank or drain line surges which would reduce this differential are to be avoided as they may cause the mainstage to shift. Mainstage tank pressure is limited to the tank line rating of the pilot valve on internally drained models (with ‘‘T’’ included in the model code). Internal drains may be used with all models except pressure centered ‘‘D’’ models. Pressure centered models must be externally drained through ‘‘Y’’ and ‘‘W’’ ports. To achieve the maximum tank line rating of 350 bar (5000 psi) of the mainstage, an external pilot drain must be used and it is recommended that a separate line be provided directly to the tank.

1. Figures in the pressure drop chart give approximate pressure drop (�P) when passing 473 l/min (125 USgpm) flow (Q) of 35 cSt (164 SUS) fluids(s) having .865 specific gravity.

2. For any other flow rate (Q1), the pressure drop (�P1) will be approximately: �P1 = �P(Q1/Q)2.

3. For any other viscosity(s), the pressure drop (�P), will change as follows:

4. For any other specific gravity (G1), the pressure drop (�P1) will be approximately: �P1 = �P(G1/G).

��

ViscositycSt (SUS)

14(75)

32(150)

43(200)

54(250)

65(300)

76(350)

86(400)

% of �P(Approx.)

��

FLOW – USgpm

FLOW – L/min

20 40 60 80 100 120 140 160 180 200

PR

ES

SU

RE

DR

OP

– b

ar

PR

ES

SU

RE

DR

OP

– p

si

0

50

100

150

200

250

300

350

400

450

1

2

34

5

7,0

10,0

17,0

20,0

3,5

0

14,0

24,0

27,5

31,0

76151

227303

379454

530606

681757

Pressure Drop Curves

16

Curves

Pressure Drop & Malfunction FlowThe following table lists the appropriatepressure drop curve and malfunctionflow curve between ports for each spooltype. Use the following example todetermine pressure drop for a selectedspool.

Example: Find the pressure drop fromP�B for type 7 spool. Using the tablefind numeral 7 in the spool type column.To the right of numeral 7 find thereference curve 2 (from pressure dropcurve chart at bottom of page) underP�B column.

The pressure drop from P�B for type 7spool would be obtained on curve 2.Likewise, the malfunction for numeral 7would be found on curve 1 (frommalfunction flow curve chart at bottom ofpage).

SpoolType

Pressure Drop Curve Number MalfunctionFlowType

P�A B�T P�B A�T P�T In CenterFlow Curve Number

0 2 2 2 2 3 1

1 1 2 1 3 2 3

11 1 3 1 1 3 3

2 1 2 1 1 – 2

3 1 2 1 4 – 2

31 1 3 1 1 – 2

4 4 3 4 2 5 3

6 1 3 1 4 – 1

7 2 2 2 1 – 1

8 4 3 4 2 5 1

9 2 3 2 2 28 bar (400 psid) @ 189 L/min (50 USgpm)

4

33 1 3 1 2 – 2

52 2 – 4 4 – 1

521 2 4 4 – – 1

20 40 60 80 100 120 140160 180

76 227 379 530 681

200

FLOW – L/min

151 303 454 606 757

0

1000

2000

3000

4000

5000

6000 415

350

280

210

140

70

0

4

3

2

1

PR

ES

SU

RE

DR

OP

– p

si

PR

ES

SU

RE

DR

OP

– b

ar

FLOW – USgpm

Malfunction Flow Curves

17

Shift Response Times

Response Times

Response times are defined as the timefrom solenoid energization/de-energizationto the point of the start of a pressurerise/decline in appropriate port.

Solenoid Energizing

Spring centered, pressure centered andspring offset DG5V-8 types must beenergized continuously. No-springdetented DG5V-8 type may beenergized momentarily. Pressurecentered and spring centered DG5V-8types return valve spool to centerposition when both solenoids arede-energized.

Mounting Position

No–spring detented valves must beinstalled with the longitudinal axishorizontal for good machine reliability.The mounting position of springcentered and spring offset models isunrestricted provided that the pilotpressure supply is maintained asrequired. (Spring offset valves do nothave a spring in the main spool section.)

0

10

20

30

40

50

60

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

Offset to Offset

Low shock solenoid shift

Low shock spring return

Fast response solenoid shift

Fast response spring return


Pilot pressure - bar35 70 100 140 175 210 280 310 350240

Tim

e -

mse

c


0

10

20

30

40

50

60

70

80

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

Center to Offset

Low shock

Fast response

35 70 100 140 175 210 280 310 350240


Tim

e -

mse

c

Spring Centering Times @Rated Flow & Pressure

Spool TypeClosed CenterOpen Center

Time.040 sec..050 sec.


0

100

2040

60

80

Tim

e -

mse

c

120 70 140 210


1000 2000 3000

Standard Low ShockFast Response

Centering Times forPressure Centered Valves

@ Rated Pressure(A to P or B to P)

18

Pilot Valves

General DescriptionPilot valves are identified in the modelcode by the following letters: ‘‘S’’Standard or ‘‘H’’ High Performance.Thepilot valves can be ordered to match avariety of mainstage spool types andvalve bodies.

The chart below shows orderinginformation for each pilot valve. Forexample, to order a High Performancepilot ‘‘H’’ with a Spring Offset mainstage‘‘A’’, use the following model code:DG4V-3-2A-M-*-60

Valve Model Code: Main Stage Spool Type Pilot Valve Model CodeValve Model Code:High Performance/Standard

Main Stage Spool Type Pilot Valve Model CodeHigh Performance/Standard

All except 4 & 8 DG4V-3(S)-2A-M-*-60

DG5V-8-S/H-*A-*-M-*-10 4A & 8A only DG4V-3(S)-2AL-VM-*-60

4AL & 8AL only DG4V-3(S)-2A-VM-*-60

All except 4 & 8 DG4V-3(S)-6B-M-*-60

DG5V-8-S/H-*B-*-M-*-10 4B & 8B only DG4V-3(S)-6BL-VM-*-60

4BL & 8BL only DG4V-3(S)-6B-VM-*-60

DG5V-8-S/H-*C-*-M-*-10All except 4 & 8 DG4V-3(S)-6C-M-*-60

DG5V-8-S/H-*C-*-M-*-104C & 8C only DG4V-3(S)-6C-VM-*-60

DG5V-8-S/H-*D-*-M-*-10All except 4 & 8 DG4V-3(S)-7C-M-*-60

DG5V-8-S/H-*D-*-M-*-104D & 8D only DG4V-3(S)-7C-VM-*-60

All except 4 & 8 DG4V-3(S)-6F-M-*-60

DG5V-8-S/H-*F-*-M-*-10 4F & 8F only DG4V-3(S)-6FL-VM-*-60

4FL & 8FL only DG4V-3(S)-6F-VM-*-60

DG5V-8-S/H-*N-*-M-*-10All except 4 & 8 DG4V-3(S)-6N-M-*-60

DG5V-8-S/H-*N-*-M-*-104N & 8N only DG4V-3(S)-6N-VM-*-60

19

Installation Dimensions

53,2(2.09)

46,0 (1.81)

92,1 (3.63)

77,0 (3.03)

153,0 (6.02)

35,4 (1.39) 70,8

(2.79)

‘‘E’’‘‘D’’

Gauge ports.4375-20UNF-2B thread.250 O.D. tubingor 1/4 BSP Thread

81,0 (3.19)

80,9 (3.19)

41,0 (1.61)

53,0 (2.09) 100,7

(3.96) 187,3 (7.38)

31,0 (1.22)

118,5 (4.67)

35,6 (1.40)

46,0 (1.81)

111,0 (4.37)

42,5 (1.67)

58,5 (2.30)

6,0 (1.22)

‘‘F’’

‘‘A’’

‘‘B’’‘‘C’’

DG5V-8-S/H-*-M-*-10Spring Centered ModelMillimeters (inches)

130,2 (5.13)

Tank Port ∅ 25,0 (0.98)

Pressure Port∅ 25,0 (0.98) Std. Model∅ 27,3 (1.07) P-port Check Model

Pilot Drain Port Y(For External Pilot Drain Models)

Port B∅ 25,0 (0.98)

Pilot Pressure Port X(For External PilotPressure Models)

Port A∅ 25,0 (0.98)

DimensionsSpool Control M difi i

‘‘A’’ ‘‘B’’ ‘‘C’’ ‘‘D’’ ‘‘E’ ’pilot ‘‘F’’pModifications

AC Sol DC SolDual Solenoid Single Solenoid Pilot

AC Sol. DC Sol.AC Sol. DC Sol. AC Sol. DC Sol.

PilotChoke

Without pilot choke or strokeadjustment 135,6

265,3(10.44)

132,6(5.22)

–Stroke adjustment

(both ends)

135,6(5.33) 415,9

(16.37)208,0(8.18)

–

Pilot choke adjustment175,6(6.91)

265,3(10.44)

132,6(5.22)

134,2(5.28)

Stroke adjust. on cyl. ‘A’135,6

208,0(8.18) 98,8 108,8 200,0 220,0 146,5 156,5

–Stroke adjust on cyl. ‘B’

135,6(5.33)

340,6132,6(5.22)

98,8(3.88)

108,8(4.28)

200,0(7.87)

220,0(8.66)

146,5(5.76)

156,5(6.16) –

Pilot choke and stroke adjust. on cyl ‘A’

340,6(13.40) 208,0

(8.18)Pilot choke and stroke

adjust. on cyl. ‘B’175,6(6.91)

132,6(5.22)

134,2(5.28)

Pilot choke and strokeadjust. on both ends

(6.91)415,9

(16.37)208,0(8.18)

(5.28)

20

DG5V-8-A(L)-*-*-10 Spring Offset ModelMillimeters (inches)

83,4 (3.28)

194,4 (7.65)

‘‘A’’

‘‘C’’‘‘B’’

‘‘E’’‘‘D’’

122,9 (4.84)

‘‘F’’

‘‘G’’

Dimensions

Spool Control ‘‘A’’ ‘‘B’’ ‘‘C’’ ‘‘D’’ ‘‘E’ ’pilot ‘‘F’’ ‘‘G’’Spool Control Modifications

AC Sol DC SolDual Solenoid Single Solenoid Reducer Pilot

AC Sol. DC Sol.AC Sol. DC Sol. AC Sol. DC Sol.

ReducerModule

PilotChoke


265,3(10.44)

132,6(5.22)

–Stroke adjustment

(both ends)

175,6(6.91) 415,9

(16.37)208,0(8.18)

–

Pilot choke adjustment215,6(8.48)

265,3(10.44)

132,6(5.22)

134,2(5.28)

Stroke adjust. on cyl. ‘A’175,6

208,0(8.18) 98,8 108,8 200,0 220,0 146,5 156,5 134,2

–Stroke adjust on cyl. ‘B’

175,6(6.91)

340,6

132,6(5.22)

98,8(3.88)

108,8(4.28)

200,0(7.87)

220,0(8.66)

146,5(5.76)

156,5(6.16)

134,2(5.28) –

Pilot choke and stroke adjust. on cyl ‘A’

340,6(13.40) 208,0

(8.18)

Pilot choke and strokeadjust. on cyl. ‘B’

215,6(8.48)

132,6(5.22)

134,2(5.28)

Pilot choke and strokeadjust. on both ends

( )

415,9(16.37)

208,0(8.18)

( )

21

DG5V-8-D-*-*-10 Pressure Centered ModelMillimeters (inches)

‘‘A’’

‘‘C’’

‘‘B’’

84,9 (3.34)

‘‘E’’‘‘D’’

‘‘F’’

‘‘G’’

Spool Co trolDimensions


‘‘A’’ ‘‘B’’ ‘‘C’’ ‘‘D’’ ‘‘E’ ’pilot ‘‘F’’ ‘‘G’’Modifications

(without Reducer) AC Sol DC SolDual Solenoid Single Solenoid Reducer Pilot (without Reducer) AC Sol. DC Sol.

AC Sol. DC Sol. AC Sol. DC Sol.ReducerModule

PilotChoke


(5 33)

326,1(12.83)

193 5 98 8 108 8 200 0 220 0 146 5 156 5–

Stroke adjust on cyl. ‘B’(5.33)

401 5193,5(7.61)

98,8(3.88)

108,8(4.28)

200,0(7.87)

220,0(8.66)

146,5(5.76)

156,5(6.16) –


175,6(6.91)

401,5(15.80)

(7.61) (3.88) (4.28) (7.87) (8.66) (5.76) (6.16)134,2(5.28)

(With reducer)


(6 91)

326,1(12.83)

193 5 98 8 108 8 200 0 220 0 146 5 156 5 131 0–

Stroke adjust on cyl. ‘B’(6.91)

401 5193,5(7.61)

98,8(3.88)

108,8(4.28)

200,0(7.87)

220,0(8.66)

146,5(5.76)

156,5(6.16)

131,0(5.15)


215,6(8.48)

401,5(15.80)

(7.61) (3.88) (4.28) (7.87) (8.66) (5.76) (6.16) (5.15)134,2(5.28)

Pilot Choke

Stroke Adjustment

Reducer

Pressure Centered Model

22

Optional Features

Pilot ChokeDGMFN-3-Y-A2W-B2W-41

Pilot choke increases the amount of timeto shift the mainstage spool, loweringthe possibility of large flow transients inthe circuit. It is adjusted by backing offlocknuts and turning adjusting screwsinward to decrease rate of spool traveland outward to increase spool travelrate. See spool control modifications inmodel code.

Stroke Adjustment

Stroke adjustment limits movement ofthe mainstage spool. Backing off thejamnut and turning the adjusting screwinward decreases spool stroke. Seespool control modifications in modelcode.

Reducer ModuleDGMX2-3-PP-FW-S-40-EN91

The reducer module is required forpiloted models when pilot prerssureexceeds 210 bar (3000 psi). Thesetwo-stage spool valves maintain areduced outlet pressure againstvariations in inlet pressure. Thesevalves are able to act as relief valves (at50% of the maximum flow) to preventexcess pressure being developed whenan actuator is subject to a reactive load.


This option provides faster springcentering time by using pilot pressure tocenter the spool. The centering springsare used in addition to pilot pressure toensure positive centering of the spool.The valve spool is returned to centerposition by pilot pressure and centeringsprings. If pilot pressure fails or fallsbelow the required minimum, the spoolwill return to center position at minimumpilot pressure flow rates for pressurecentered valves.

Pressure Drop Across Check Valve

0 20 40 60 80 100 120 140 160 180 200

75.7151.4

227.1302.8

378.5454.2

529.9605.6

681.3757.0

6,9

13,8

20,7

27,6

34,5

41,4

48,3

00

700

600

500

400

300

200

100

FLOW - USgpm

FLOW - L/min

PR

ES

SU

RE

DR

OP

- b

ar

PR

ES

SU

RE

DR

OP

- p

si

‘‘R ’’ Spring

‘‘S’’ Spring

‘‘K’’ Spring

‘‘Q’’ Spring

�

23

Integral Check Valves

For internal pilot pressure, an integralpressure port check valve is requiredfor internally piloted valves with opencenter spools (0,1,4,8 & 9). The pilotpressure generated is the total of:P→T drop through the valve in centercondition, pressure drop through thecheck valve, plus the pressure at thetank port.

For proper operation, total pressuredrop must be greater than theminimum required pilot pressure (seechart). To prevent load drop, a checkvalve in the pressure port can beused to prevent reverse flow from acylinder port to pressure port. If usingas reverse flow check, maximumreverse pressure is limited to 210 bar(3000 psi).

X - Fast Response

Use of this option decreases the shifttime and increases the system shockgeneration. This requires the removal ofan orifice plug within the mainstagebody. It is available on all models byadding ‘‘X’’ to the model code. Example:DG5V-8-(*)-2C-X-(*)-10

When a standard performancepilot is selected and pilotpressure is above 3000 psi,

the reducer module is required to limithigh drain line pressure transientsgenerated during shifting.

24

Electrical Information

Typical Solenoid EnergizingSolenoids identified to U.S. standards

Functional symbols related to solenoididentity “A” and/or “B” according toNFPA/ANSI standards, i.e. energizingsolenoid “A” gives flow P to A, solenoid“B” gives flow P to B (as applicable).

Port APort P

Port TPort B

SolenoidB

SolenoidA

Solenoid For spool type Solenoid

B All except “8” A

A “8” only B

For valves with type “8” spools, solenoididentity to U.S. convention is the same as forEuropean convention.

Solenoids identified to Europeanstandards (specify “V” in modelcode)

Functional symbols related to solenoididentity “A” and/or “B” according toEuropean convention i.e. solenoid “A”adjacent to “A” port, solenoid “B” adjacentto “B” port of valve.

Port APort P

Port TPort B

SolenoidA

SolenoidB

DG4V-3 High PerformanceSolenoid Coil Ratings

SolenoidIdentification

Letter

Solenoid VoltageRating

BL 110V AC 50Hz120V AC 60 Hz

DL 220V AC 50 Hz240V AC 60 Hz

GL 12V DC

HL 24V DC

DG4V-3(S) Standard PerformanceSolenoids Coil Ratings

SolenoidIdentification

Letter

Solenoid VoltageRating

A 110V AC 50Hz

B 110V AC 50 Hz120V AC 60 Hz

C 220V AC 50 Hz

D 220V AC 50 Hz240V AC 60 Hz

G 12V DC

H 24V DC

Power Consumption

AC solenoids (for coils listed in model code).

Initial �VA (RMS)

HoldingVA (RMS

Initial �VA (RMS)

HoldingVA (RMS)

Full power coils:Single frequency coils AC 50 HzDual frequency coils at 50 HzDual frequency coils at 60 HZ

225265260

394948

265280300

546158

Low power coils, “BL” and “DL”:Dual frequency coils at 50 HzDual frequency coils at 60 Hz

Low power coils not usablewith DG4V-3S valves.

170190

3737

Power consumption, DC solenoids atrated voltage and 20�C (68�F).

Full power coils:12V, model type “G”24V, model type “H”

30W30W

––

30W30W

––

Low power coils:12V, model type “GL”24V, model type “HL”

Low power coils not usablewith DG4V-3S valves.

18W18W

––

� 1st half cycle; armature fully retracted.

25

24,00(0.94)

Models for use with ISO 4400 (DIN 43650) connectorsMillimeters (inches)

Double solenoid models Single solenoid models DG4V-3(S)-*C-**-(V)M-U-**-60 DG4V-3(S)-*A(-**)� DG4V-3(S)-*AL(-**)� Solenoid andDG4V-3(S)-*N-**-(V)M-U-**-60 DG4V-3(S)-*B(-**)� DG4V-3(S)-*BL(-**)� end cap

DG4V-3(S)-8BL(-**) DG4V-3(S)-8B(-**) interchangedDG3V-3(S)-*F� DG4V-3(S)-*FL(-**)�

Asshown

Model type AC or DC A Dim. B Dim. C Dim. D Dim.

All DC = 220 (8.66) 156 (6.14) 61 (2.5) 73 (2.87)

DG4V-3 AC � 200 (7.87) 146 (5.75) 51 (2.1) 63 (2.48)

DG4V-3S AC � 200 (7.87) 146 (5.75) 45 (1.7) 63 (2.48)

� Not applicable to type “8” spool.

� Can vary dependent on source of plug.

Water-resistant manual override on solenoidDG4V-3(S)-****(L)-H-(V)M-**-**-60

ApplicationGeneral use where finger operation is required (standardmanual overrides cannot be operated without using smalltool).

Latching manual override on solenoidDG4V-3-****(L)-Y-(V)M-**-**-60DG4V-3S-****(L)-Y-(V)M-**-**-60, DC coil models only

ApplicationStainless steel lever/latch mechanism and water-resistant seal make thisfeature ideal for vehicle-mounted and exposed applications requiringemergency selection of valve for a period of time in the event of electricalfailure.

Note:“H” feature is not field convertible from other models; specify with order.

Notes:1. Opposite solenoid (on “C” and “N” double solenoid models) should not be energized

while the valve is latched in selected position; AC solenoid coils will burn out underthis improper usage.

2. “Y” feature is field-convertible from “H” type manual override (omitting spacer), but isnot field-convertible from other models.

Spacer

15(0.6)

Overall length of valve withstandard manual overridesManual

actuation mustbe applied withinthis diameter:approximately20 (0.75).Spacer preventsactuation bylarger device.

Coil types: U (shown), KU, SP1,and SP2 (see Model Code)

A (double solenoid model)

�87,0(3.42)

53,00(2.1)

Overall length of valve withstandard manual overrides

B (single solenoid model)

21,75(0.86)

25,00(0.98)

�100,0(4.0)

D 74,00(2.91)

48,00(1.88)

Alternative plug positions byloosening knurled nut, turningcoil, and re-tightening.

Port APort P

Port TPort B

C, coillength

3rd angleprojection

Lever in latched position

Lever in free position

Push lever tooperate valve;latch holds lever inoperated position

Lift latch torelease lever

65(2.5)

40(1.6)

26

47(1.85)

Groundconnection4,0 (0.16 dia.)self–tappingscrew

Models with “F” type coils (lead wires) and conduit box.Millimeters (inches)

Double solenoid models � Single solenoid models �DG4V-3(S)-*C-**-(V)M-F-**-60 DG4V-3(S)-*A(-**)� DG4V-3(S)-*AL(-**)� Solenoid andDG4V-3(S)-*N-**-(V)M-F-**-60 DG4V-3(S)-*B(-**)� DG4V-3(S)-*BL(-**)� end cap

DG4V-3(S)-8BL(-**) DG4V-3(S)-8B(-**) interchangedDG3V-3(S)-*F� DG4V-3(S)-*FL(-**)�

Asshown

Model type AC or DC A Dim. B Dim. C Dim. D Dim.

All DC = 220 (8.66) 156,5 (6.14) 61 (2.5) 73 (2.87)

DG4V-3 AC � 200 (7.87) 146,5 (5.75) 51 (2.1) 63 (2.48)

DG4V-3S AC � 200 (7.87) 146,5 (5.75) 45 (1.7) 63 (2.48)

� Not applicable to type “8” spool.

Codes “FJ” and “FW”: 2 lead wires for each solenoid, approximately 150,00 (6.00) long.M3 (#6) terminals provided for customer connection.

Codes “FTJ” and “FTW”: Valve supplied with lead wires connected into terminal strip suitablefor M3 (#6) terminals for customer connection.

Two leadwires per

solenoid withM3 size

terminals forcustomer

connections

24,00(0.94)

25,00(0.98)

3,0(0.12)

*J & W conduit boxes

Thread connection“W” – NPT“J” – M20 × 1.5-8H

91,00(3.57)

21,75(0.86)

48,00(1.88)

50,00(2.0)

A (double solenoid models)

B (single solenoid models)

C coillength

D74,00(2.91)

68,75(2.71)

53,00(2.1)

Port APort P

Port TPort B

* 89 (3.5) for FPB – J & W conduit boxes104 (4.0) All plug-in conduit boxes

27

248,2 (9.8) with DC solenoid238,2 (9.4) with AC solenoid

DG4V-3-*A(L)-(V)M-S6-U-**-60Millimeters (inches)

Single solenoid models with LVDT typeswitch indicating when the spool is in thespring off-set position. ISO 4400 (DIN43650) connection to solenoid;Pg7 connection to switch.

DG4V-3-*A(L)-(Z)-(V)M-S3-FPA5W-*2-60DG4V-3-*A(L)-(Z)-(V)M-S4-FPA5W-*2-60DG4V-3-*A(L)-(Z)-(V)M-S5-F-*2-60Single solenoid models with mechanical type switchmonitoring of spool movement.

Conduit box with leads, or pre-wired to NFPAT3.5.29-1980 receptacle.

Port restrictor plugsRestrictor plugs are available for use inports P, T, A or B. These can be usedfor restricting flow or for circuitdampening. Restrictor plugs are notrecommended for use above 210 bar(3000 psi) system pressure.

Typical model codes:DG4V-3(S)-**-M-**-**-60-P08(0.8 mm dia orifice in port P)

DG4V-3(S)-**-M-**-**-60-P10-A10(1.0 mm dia orifice in ports P and A)

Restrictor plug selection table

Code Orifice Partdiameter number�

*00 Blank 694353*03 0,30 (0.012) 694341*06 0,60 (0.024) 694342*08 0,80 (0.030) 694343*10 1,00 (0.040) 694344*13 1,30 (0.050) 694345*15 1,50 (0.060) 694346*20 2,00 (0.080) 694347*23 2,30 (0.090) 694348

* = P, T, A or B, as required� Available in multiples of 25 per part number

Maximum port dia in subplate/manifoldblock:For steel and SG (ductile) iron: 7,0 (0.3)For gray iron: 6,5 (0.25)

For coil removal:64 (2.51) DC coil54 (2.12) AC coil

138,2 (5.44)

Location of solenoidfor RH build models�

Location of switchfor RH build models� Plug (part no. 458939)

supplied with valve

Cable gland PG7:6,0 (0.24) dia.

Pin number 2, supply +ve

Pin number 3, 0V Pin number 1,“normally open”

Pin number 4,“normally closed”

�For LH build (DG4V-3-*AL)solenoid and switch locationsare reversed.

�For LH build (DG4V-3-*AL)solenoid and switch locations are reversed. 200 (7.87) with AC solenoid

210 (8.27) with DC solenoid

100 (3.94)

Location of switch and housingfor RH build models�

Normally closed lead (Monitor switch)sleeving identification color white.Common lead (Monitor switch)sleeving identification color black.

Normally open lead (Monitor switch)no color identification.

Location of solenoidfor RH build models�

54 (2.12)for removalof switch hsg.

See page 15 for details of connections to pre-wired 5-pin receptacle for:“S3” normally open and“S4” normally closed.

M5 x 0.8-6H threadfor plug extraction

28

Terminal strip and lightsFor valves with type “F” coils.Millimeters (inches)

�1. For DC coils the +ve lead(s) must be connectedto the terminal(s) marked +. When using 3-wireincoming leads to double solenoid valves (i.e.common neutral) the inner pair of terminals mustbe interconnected

2. For correct light indication of energized solenoidensure that solenoid leads are correctly connected:light terminals are common with each outer pair ofsolenoid terminals according to the side with + mark.

Terminal strip(part number

890345) clips tocover and can

be field-fitted

M3 x 0,5-6H screws(part number 186006)

2 each end

4 terminal screws M3 x 0,5-6H (part number 02-113355)

Connections to solenoid A(or B, according to model type)

Connections tosolenoid B

(or A, accordingto model type)

Rubber gasket

Conduit box cover andnameplate complete withsealing gasket and 4 screws

Anti-rotation tab ensurescorrect orientation of coverto junction box

28,50(1.12)

30,00(1.18)

Light assembly is held in placeby end pair of M3 screws; canbe fitted to terminal strip.

2 lenses in cover

�

�

Insta-PlugDG4V-3(S)---FPA---60DG4V-3(S)---FPBW---60

Vickers 2-part “Insta-Plug” eliminatesbreaking electrical inputs for valvedisconnect. A male half is pre-wired tothe valve body. The mating plug is inside

a wire housing with external terminalsfor machine wire connections.

Captive thumb screws, when loosened,permit the wire housing to be pulledclear of the valve for disconnect. Alonger ground post provides firstmake/last break ground connection.

The PBW configuration combines bothmale and female plugs in the wiringhousing for a self-contained plug-in unit.

Optional solenoid indicator lights arepre-wired to the female plug. Solenoids“A” and/or “B” are identified on the wiringhousing.

24,0(0.95)

PA configurationMillimeters (inches)

PBW configuration

71,1(2.80)

16,25(0.64)

47,5(1.87)

ref.

Port A Port BPort A Port B

15,5(0.61)

20,25 (0.79)

32,50(1.28)

M4-6H thd.

48,0(1.89)

89,0(3.50)�

Ground connectionin terminal box (ref.)

WARNING TAG“Electrical powermust bedisconnectedbefore removingor replacing thisreceptacle”.

Customer connection solenoid atport A end of body to femalereceptacle plate

Customer connectionsolenoid at port B end ofbody to femalereceptacle plate

69,0(2.72)

ref.

98,5(3.88)

23,1(0.91)

Clearance to removefemale receptacle

�The conduit box dimensions used for the PA/PBW type connector are different from those on the other “F” type coil models.

3 pin connectorUse with single solenoid valveKey model code designations:DG4V-3(S)-*A(L)(-**)-(V)M-FPA3W(L)DG4V-3(S)-*B(L)(-**)-(V)M-FPA3W(L)

5 pin connectorUse with single solenoid valve with S3spool position monitor switchKey model code designations:DG4V-3-*A(L)(-**)-(V)M-S3-FPA5W(L)

5 pin connectorUse with single solenoid valveKey model code designations:DG4V-3(S)-*A(L)(-**)-(V)M-FPA5W(L)DG4V-3(S)-*B(L)(-**)-(V)M-FPA5W(L)

68,75(2.71)

16,00(0.62)

0.875-16UN-2A thd.

41

2 3

54 – lead tosolenoid A

1 – lead to solenoid B

3 – green lead (ground)

5 – lead tosolenoid B

2 – lead to solenoid A

12

3

25,4 (1.00) hex(reference all types)

3 – lead to solenoid



41

2 3

54 – lead to monitorswitch, n.o.



5 – lead tosolenoid

2 – lead to monitor switch, common

41

2 3

5




41

2 3

54 – lead capped




2 – lead capped

Warning tag:“Electrical power must bedisconnected before removingor replacing electrical plug.“

5 pin connectorUse with double solenoid valve Key model code designations:DG4V-3-*C/N(L)(-**)-(V)M-S4-FPA5W(L)

5 pin connectorUse with single solenoid valve with S4spool position monitor switchKey model code designations:DG4V-3-*A(L)(-**)-(V)M-S4-FPA5W(L)

4 – lead to monitor switch, n.c.

2 – lead to monitor switch, common

29

NFPA Connector T3.5.29-1980Connection details and model type/model code references.Millimeters (inches)

DG4V-3(S)---FPA3W(L)-**-60DG4V-3(S)---FPA5W(L)-**-60DG4V-3---S3-FPA5W(L)-**-60DG4V-3---S4-FPA5W(L)-**-60

The receptacle is a standard three orfive pole connector with shortened leadsand terminals added. The five pole plughas four leads 101,6 (4.0) long and one177,8 (7.0) long. The three pole plughas two leads 101,6 (4.0) long and one177,8 (7.0). All wires have underwritersrecognized non-solder insulated eyeletterminals. The green wire is used for theground (earth) connection (No. 8 screwfurnished). Valves are suppliedpre-wired.

30

DIN 43650 Connector

Cable diameter range Ø6–10 mm (0.24–0.40). . . Wire section range Ø,5–1,5 mm2 (0.0008–0.0023 in2). . . . . . Terminals Screw type. . . . . . . . . . . . . . Type of protection IEC144 class IP65, when plugs are fitted correctly to . . . . . .

the valves with interface seals (supplied with plugs) in place.

Voltage(AC or DC) Gray –

“A” sol.Black –“B” sol.

12-24100-125200-240

977467977469977471

977466977468977470

710775710776U1 Coilswithout lights

U6 Coilswith lights

ReceptacleSeal

51 (2.01)27

(1.06)

22,5(0.88)

∅

M3thread 5,5

(0.22)

1,5(0.06)

30,5 sq.(1.20)

26,5(1.04)27,5

(1.08)

18 sq.(0.71)

Part Numbers

U11 Rectifiedcoils withlights

12 DC 02-14135824 DC 02-14135998-240 VDC 02-141360200-240 VDC 02-141361

U12 Rectifiedcoils withoutlights

02-141357

DIN 43650 ConnectorMillimeters (inches)

Surge Suppression Devices(For DC Valves)

Connector can be positioned at 90�intervals on valve by re-assemblingcontact holder into appropriateposition inside connector housing.

Use U12 or U11 type connectors with12 and 24V DC coils if rectification isrequired.

Connectors with and without indicatorlights are available (order separately):

Standard diodeDiode in parallel with coil. When switch(S1) is opened, the energy stored in thecoil is trapped and dissipated by thediode (D1).

D Works only with DC voltage

D Polarity dependent

D Increases drop out time

TranszorbDiode and Zener diode in parallel withcoil. When switch (S1) is opened, theenergy stored in the coil is trapped anddissipated by the diode (D1) and Zenerdiode (Z1) and the coil resistance.

D The Zener makes exact limitation ofinductive spikes.

D Works only with DC voltage

D Polarity dependent

S1D1 (No 2)

(No 1)

S1

D1

(No 2)

(No 1)

��

Coil Coil

NOTE: These surge suppressiondevices are “Polarity Dependent.” Properbiasing conditions must be met wheninstalling/connecting a coil in a system.

Shift Dropout

CETOP 3

No Diode 23 60 Diode Alone 23 141 Diode/Zener 23 78

CETOP 5

No Diode 70 50 Diode Alone 70 158 Diode/Zener 70 100

Times represent cessation/applicationof voltage to coil versus velocity(start/stop) of a cylinder using a singlesolenoid, spring offset valve (time inmilliseconds).

Valve Shift and Dropout TimesWith and Without Surge Suppression

�

�

�

�

31

Mounting Surface

SubplatesSubplates must be ordered separately.When a subplate is not used, a machinedpad must be provided for mounting. Padmust be flat within 0,13 mm (.0005 inch)and smooth within 0,8 mm (32 microinch).

Note‘‘E’’ in subplate model codedesignates side ported models.

Subplate Model Code

Thread Size

DGVM-8-10-T12 1.062’’-12UNDGVM-8-10-T16 1.312’’-12UNDGVM-8-10-T20 1.625’’-12UNDGVME-8-10-T12 1.062’’-12UNDGVME-8-10-T16 1.312’’-12UNDGVM-8-D-10-T12 1.062’’-12UNDGVM-8-D-10-T16 1.312’’-12UN

Mounting BoltsMounting bolts not included with subplatemounted valves or subplates for thosevalves. Bolts used should be grade 7 orbetter. Order kits to obtain correct bolts:

Mounting Bolt KitsMetric BKDG8-655MInch BKDG06-635

Application DataFluid Cleanliness

Proper fluid condition is essential forlong and satisfactory life of hydrauliccomponents and systems. Hydraulicfluid must have the correct balance ofcleanliness, materials, and additives forprotection against wear of components,elevated viscosity, and inclusion of air.

Essential information on the correctmethods for treating hydraulic fluid isincluded in Vickers publication 561“Vickers Guide to SystemicContamination Control” available fromyour local Vickers distributor or bycontacting Vickers, Incorporated.Recommendations on filtration and theselection of products to control fluidcondition are included in 561.

Recommended cleanliness levels, usingpetroleum oil under common conditions,are based on the highest fluid pressurelevels in the system and are coded in the

chart below. Fluids other than petroleum,severe service cycles, or temperatureextremes are cause for adjustment ofthese cleanliness codes.

Vickers products, as any components,will operate with apparent satisfaction influids with higher cleanliness codes thanthose described. Other manufacturerswill often recommend levels above thosespecified. Experience has shown,however, that life of any hydrauliccomponent is shortened in fluids withhigher cleanliness codes than thoselisted below. These codes have beenproven to provide a long, trouble-freeservice life for the products shown,regardless of the manufacturer.

Fluids and Seals

The use of synthetic, fire resistant fluidsrequires a valve with special seals. Addprefix ‘‘F3’’ to the model code when

phosphate ester oil or its blend are to beused. Add prefix ‘‘F6’’ to the model codewhen water glycol or water-in-oilemulsions are to be used.

The pilot valve has ‘‘F3’’ seals (Viton�) asstandard. All internal seals of themainstage are also ‘‘F3’’. Mounting faceseals are standard (Buna-N). ‘‘F6’’ prefixdenotes special seals (Nitrile) throughoutthe valve assembly.

Fluid Cleanliness Rating

20/18/15

Viscosity Range

75 to 600 Ssu (15 to 128 cSt)

Operating Temperature Range

–18� to 66�C (0� to 150�F)

25,4 (1.00)

180,9 (7.12)

130,2 (5.12)

112,7 (4.43)

94.4 (3.71) 53,2 (2.09)

29,4 (1.15) 5,5 (0.22)

‘‘T’’ - Tank connection

‘‘P’’ - Pressure connection

‘‘Y’’ - ExternalPilot pressureconnection - DG3VPilot drainconnection - DG5V 4,7 (0.18)

19,0 (0.75) 92,1

(3.62)

‘‘B’’ - Port connection

0.500-13 UNC-2Bthread 6 places

‘‘A’’ Port connection100,8 (3,96)

77,0 (3.03)

29,4 (1.15)

17,5 (0.68)

∅ 7,0 (0.27)2-places

‘‘X’’ - External pilotpressure connection

∅ 10,7 (0.42)

‘‘W’’ port required forpressure centeredmodels. Use subplateDGVM-8-D-10-T*.

73,0 (2.87)

46,0 (1.81)

∅ 10,3 (0.40)4-places

35,0 (1.37)

17,5 (0.69)

74,6(2.94)

5007.02/EN/1197/APrinted in U.S.A.

Form No. 00-000 Copyright Eaton Corporation, 0000All rights reserved.Printed in U.S.A

Eaton Hydraulics15151 Highway 5Eden Prairie, MN 55344Telephone: 612 937-7254Fax: 612 937-7130www.eatonhydraulics.com

46 New Lane, HavantHampshire PO9 2NBEnglandTelephone: (44) 170-548-6451Fax: (44) 170-548-7110

Documents

Vickers Valves Pilot Operated Directional Valvesvickers.sh.cn/pdfs/500702en1197a.pdf · Valves Pilot Operated Directional Valves