DG5*-H8-2C Spring-Centered Valve Example

March 1996 GB-2327A

Directional Control Valves

DG3*-H8; 30 and 10 Series, Pilot Operated

DG17*-H8; 30 and 10 Series, Manually Operated

DG5*-H8; 50 and 30 Series, Solenoid Controlled, Pilot Operated

ISO 4401 Size 08

Typical Section

General Description

DG**-H8 valves are used primarily for

controlling the starting, stopping and

direction of fluid flow.

Basically, six series of valves are

available grouped into DG*S moderate

pressure versions and DG*V high

pressure versions. There is a choice of

up to 18 different spools, dependent on

valve configuration. These include

meter-in and meter-out spools, and

regeneration types that can obviate

extra valves essential in traditional

circuit arrangements. All spools have

been designed to provide good low

shock, fast response characteristics

which can be enhanced by optional

stroke and/or pilot choke adjustments.

Models include spring offset, spring

centered, pressure centered and

detented versions. All are available with

the option of an integral P-port

minimum-pilot-pressure generator. DG5*

valves can be arranged for internal or

external pilot pressure and/or drain

connections.

Basic Characteristics

Mounting Surface mounting. . . . . . . . . .

Max. pressure:

DG*S 210 bar (3000 psi). . . . . . . . . . . .

DG*V 350 bar (5000 psi). . . . . . . . . . . .

Max. flow 700 L/min (185 USgpm). . . . .

Features and Benefits

 High pressure and flow capability for

maximum cost-effectiveness.

 Low headloss to minimize power

wastage.

 Low shock characteristics to

maximize machine life.

 Facility to change solenoid coils

without disturbing the hydraulic

envelope.

 The many optional features,

particularly for DG5* valves, permit

matching to virtually every application

within the valve’s power capacity.

Vickers

Valves

Functional Symbols

Spring Centered, DG3*-H8-*C

Spool types: All 

Pressure Centered, DG3*-H8-*D

Spool types: All 

Spring Offset, End-to-End,

Opposite Hand, DG3*-H8-*AL

Spool types: 0, 2, 6, 9, 52,

521, X2, Y2

DG3-H8 Options

The following are shown in a

DG3*-H8-*C example:

1. Pilot choke module

2. Minimum pilot pressure generator

3. Stroke adjusters at either or at both

ends (shown at both ends in example)

One or more options can be built into

any DG3 series valve.

Comprehensive and simplified symbols.

Spring Offset, End-to-End,

DG3*-H8-*A

Spool types: 0, 2, 6, 9, 52,

521, X2, Y2

XPTYBA

b

oa

b

a

XPTYBA

b oa

XPTYBA

PT Y B A

boa

PT Y B A

b oa

b

a

DG5*-H8, Solenoid Controlled, Pilot Operated Models

Comprehensive and simplified symbols, shown configured for external pilot supply

and internal drain.

Spring Offset, End-to-End,

DG5*-H8-*A

Spool types: 0, 2, 6, 9, 52,

521, X2, Y2

Spring Offset, End-to-End,

Opposite Hand, DG5*-H8-*AL

Spool types: 0, 2, 6, 9, 52,

521, X2, Y2

 “a” and “b” interchanged for spool types 4

and 8.

 “X” and “Y” spools require a stroke adjuster

at one or both ends, dependent on the

application, to limit stroke towards “a”

and/or “b”.

DG3*-H8 Pilot Operated Models

XPTYBA

Spring Centered, DG5*-H8-*C

Spool types: All

b oa

XPTYBA

Spring Offset, End-to-Center,

Opposite Hand

Models Spool types

DG5*-H8-*B 4, 8

DG5*-H8-*BL 0, 2, 521, X2, Y2

b oa

oa

PYBA

b oa

b

Spring Offset, End-to-Center

Models Spool types

DG5*-H8-*B 0, 2, 521, X2, Y2

DG5*-H8-*BL 4, 8

PT Y B A

b oa

Pressure Centered, DG5*-H8-*D

Spool types: All

XPT YBA

Detented, DG5*-H8-*N

Spool types: 0, 2, 6, 9, 52, 521,

X2, Y2

boa

b

a

 “a” and “b” interchanged for spool types 4 and 8.

 “X” and “Y” spools require a stroke adjuster at one or both ends, dependent on the

application, to limit stroke towards “a” and/or “b”.

XPTYBA

b

a

b

a

DG5*-H8 Options

The following are shown in a

DG5*-H8-*C example:

1. Pilot choke module

2. Minimum pilot pressure generator

3. Stroke adjusters, at either or at both

ends (shown at both ends in example)

4. External pilot connection

5. Internal drain

One or more options can be built into

any DG5 series valve, the only

exception being that the internal drain

option is not available with DG5*-H8-*D

(pressure centered) valves.

XPTYBA

Spring Centered, DG17*-H8-*C

Spool types: 0, 2, 4, 6, 8, 33

Detented, DG17*-H8-*N

Spool types: 0, 2, 4, 6, 8, 33

b

a

b

a

Spring Offset, End-to-End,

Opposite Hand, DG17*-H8-*AL

XPTYBA

Spool types: 0, 2, 6

DG17*-H8 Hand-Lever Operated Models

Comprehensive and simplified symbols.

Spring Offset, End-to-End,

DG17*-H8-*A

Spool types: 0, 2, 6

XPTYBA

“a” and “b” interchanged for spool types 4 and 8.

XPTYBA

b oa

b o

a

Symbols on Nameplates

Typical illustrations for:

DG3*-H8-2D-1

DG5*-H8-3C-2-E-T-*

PT Y B A

XPTYBA

1. On main stage

2. On cover plate

1. On main stage

3. On pilot choke module

4. On pilot stage valve

Notes:

a. For clarity pilot lines (dotted lines in illustrations) are omitted from the main-stage nameplate.

b. Where a minimum pilot pressure generator (check valve symbol) is provided the letter P is

omitted from the nameplate for clarity.

33 &

34 s

521

X33

Y33

boa

Spool Types

Shown in 3-position form, plus 2

transients

Notes:

1. In the detailed and simplified symbols on

this and the previous pages, the transient

positions are omitted for simplicity.

2. In certain 2-position valves, the “o” position

becomes an additional transient, i.e. in

DG5*-H8-*A(L) and DG5*-H8-*N valves.

 The performance of the “33” and “34”

spools differ only in the center position.

Your Vickers representative can provide

further details.

Application Notes

Pilot Pressure

a. Pilot pressure must always exceed

tank line pressure by at least the

requisite minimum pilot pressure.

This also applies when combining

open-center spools (0, 1, 4, 8, 9 and

11) with internal pilot pressure, but

they should be used only with

externally drained valves.

b. Internally drained valves may be used

only when surges in the tank line

cannot possibly overcome the

minimum pilot pressure differential

referred to above. When the

possibility of pressure surges in the

tank line exist, externally drained

valves are recommended.

c. When DG5*-H8-*N valves are

de-energized the pilot and main

spools remain in the last selected

position, provided that pilot pressure

is maintained. If pilot pressure fails, or

falls below the minimum, the main

spool will spring center.

Caution: Because of this in-built feature the

flow conditions of the center position must be

selected with care, for the effect on both the

direction of flow and the pilot pressure.

Minimum-Pilot-Pressure Generator

Option

Can be built into the P-port to create a

specific minimum pilot pressure

differential where internal pilot pressure

is required with open-centered spools,

i.e. 0, 1, 4, 8, 9 and 11.

Stroke Adjustment Options

These control the maximum opening of

the main spool/body passages by

adjusting the limits of spool stroke. By

this means, the response time and the

pressure drop across the valve for any

particular flow rate can be controlled.

Stroke adjusters can be fitted at either or

both ends of the main-stage valve for

adjusting the stroke in one or both

directions. One use of stroke adjusters

is for controlling the metering

characteristics of “X*” or “Y*”-type

spools. (See model code .)

Pilot Choke Adjustment Options

These provide a meter-out flow control

system to the fluid in the pilot chambers

of main-stage valves. This allows the

velocity of the main-stage spool to be

controlled, thereby reducing transient

shock condition. For optimum results, a

constant reduced pilot pressure is

recommended.

Control Data, General

a. Dependent on the application and the

system filtration, any sliding spool

valve, if held shifted under pressure

for long periods of time, may stick and

not move readily due to fluid residue

formation. It may therefore need to be

cycled periodically to prevent this

from happening.

b. Surges of fluid in a common drain line

serving two or more valves can be of

sufficient magnitude to cause

inadvertent shifting of the spools.

It is recommended that circuit

protection be used, such as separate

drain lines.

c. Control by stroke adjusters, pilot

chokes and minimum-pilot-pressure

generator options is described far left.

Model Code

(F3-)

Fluid compatibility

Blank = Antiwear hydraulic oil

(class L-HM), invert emulsion

(class L-HFB), or water glycol

(class L-HFC)

F3 = As above or phosphate ester

(class L-HFD)

Note: For further information see “Hydraulic

Fluids” section seven pages on.

Pressure rating

S = 210 bar (3000 psi)

V = 350 bar (5000 psi)

Spool type

See “Functional Symbols” section

commencing four pages back

Spool spring arrangement

A = Spring offset, end-to-end

(P to B when operated)

AL = As “A” but left-hand build

(P to A when operated)

B = Spring offset, end-to-center

(P to B when operated)

BL = As “B” but left-hand build

(P to A when operated)

C = Spring centered

D = Pressure centered

N = Two-position detented

 DG5* option. Same function from

DG3*-H8-*C valves by alternating pilot

supply to one port (X or Y) and

permanently draining the other.

 Option for DG3* and DG5* models only.

DG3 *** ** (-**) -**

1 2 3 14

For hand-lever operated valves:

(F3-)DG5 -**

1 2 3 14

(-E)

(-T)

(-*) (V)

M- ***** (L) -*5

10 12 13

Spool control

1 = Stroke adjustment at both ends

2 = Pilot choke adjustment both ends

3=“1” and “2” combined

7 = Stroke adjustment, port A end

only

8 = Stroke adjustment, port B end

only

27= “2” and “7” combined

28= “2” and “8” combined

Omit if not required

 Not applicable to DG5*-H8-*B(L) models.

 Not applicable to models shown in the

“DG5*-H8-*BL spring offset, end-to-

center, opposite hand” section three

pages back.

 Not applicable to models shown in the

“DG5*-H8-*B spring offset, end-to-

center” section three pages back.

External pilot supply

Omit for internal pilot supply

Internal pilot drain

Omit for external drain, which is also

mandatory for 1, 4, 8 and 9 spool-type

valves

Minimum-pilot-pressure

generator (“P” port option)

K = 0,35 bar (5 psi) cracking pressure

S = 5,2 bar (75 psi) cracking pressure

Omit if not required

* -H8- (-*)

5 8

(F3-)DG17 ** ** -**

1 2 3 14

*-H8-

For solenoid controlled, pilot operated valves:

*** ** (-**)-H8-*

(-*)

9 11

Manual override option

Blank = Plain override in solenoid

end(s) only

H = Water-resistant manual override

on solenoid end(s)

Z = No override at either end

 No override in non-solenoid end of

single-solenoid valves.

Solenoid energization identity

V = Solenoid “A” is at port A end of

pilot valve and/or solenoid “B” at

port B end independent of

main-stage valve port locations or

spool type; German practice.

Omit (except as noted below) for US

ANSI B93.9 standard whereby solenoid

“A” is that which when energized

connects P to A in main-stage valve,

and/or solenoid “B” connects P to B.

Note: Energization identities on valves with

type 4 or 8 spools are identical under US and

German practices. In such cases the “V” code

is used.

For pilot operated valves:

14 Design number

10 series for DG3/17V valves

30 series for DG3/17S valves

30 series for DG5V valves

50 series for DG5S valves

Subject to change. Installation

dimensions unaltered for design

numbers *0 to *9 inclusive.

Supporting Products

See under that heading three pages on.

Indicator lights, option for codes

FTJ, FTW, FPA3W and FPA5W

L = Lights fitted

Omit if lights not required

For U-code solenoids use plug with

integral light, see eleven pages on.

Coil rating

See “Operating Data” for further

information.

A = 110V AC 50 Hz

B= 110V AC 50 Hz/120V AC 60 Hz

C = 220V AC 50 Hz

D= 220V AC 50 Hz/240V AC 60 Hz

G = 12V DC

H = 24V DC

 For 60 Hz or dual frequency.

Solenoid type/connection(s)

U = ISO 4400 (DIN 43650)

mounting

FW =

 NPT thread junction box

FTW =

 NPT thread junction box

and terminal strip

FJ = M20 thread junction box

FTJ = M20 thread junction box and

terminal strip

FPA3W= Junction box with 3-pin

male connector to

NFPA T3.5.29-1980 for

single-solenoid valves

FPA5W= Junction box with 5-pin

male connector to

NFPA T3.5.29-1980 for

single or double-solenoid

valves

 Some female plug connector options

available separately from Vickers Systems

(see “Plugs to ISO 4400” eleven pages on).

Others available from electrical stockists.

 Female connector to be supplied by user.

Operating Data

Performance data typical under standard test conditions which use antiwear hydraulic oil (Class L-HM) at 21 cSt (105 SUS)

and 50C (122F).

Maximum pressures

See “Maximum operating pressures” table two pages on

Maximum flow rates, in L/min (USgpm) at the minimum pilot

pressures (see “Pilot Pressures” three pages on)

Model Spool type

Max. flow rate, L/min (USgpm) at:

210 bar (3000 psi) 350 bar (5000 psi)

DG3*-H8-*A(L) 0, 2, 6, 9, 52 & 521

X2 & Y2

500 (132) 500 (132)

300 (80) 300 (80)

DG5*-H8-A(L) 2 & 3

DG3*-H8-*C 4

DG5*-H8-*B(L) 6

DG5*-H8-*C 8

DG5*-H8-*N 9

31, 33, 34, 52 & 521

X2, X33, Y2 & Y33

700 (185) 650 (172)

650 (172) 500 (132)

700 (185) 700 (185)

350 (92) 220 (58)

650 (172) 600 (160)

700 (185) 450 (120)

350 (92) 220 (58)

650 (172) 500 (132)

700 (185) 700 (185)

300 (80) 300 (80)

0, 1, 2 & 3

DG3*-H8-*D 6

DG5*-H8-*D 8

11, 31, 33, 52 & 521

X2, X33, Y2 & Y33

700 (185) 700 (185)

350 (92) 220 (58)

650 (172) 600 (160)

650 (172) 350 (92)

400 (106) 300 (80)

700 (185) 700 (185)

300 (80) 300 (80)

DG17*-H8-A(L) 0, 2 & 6

DG17*-H8-*N

530 (140) 530 (140)

DG17*-H8-*C 0, 2, 6, 8 & 33

530 (140) 530 (140)

350 (92) 220 (58)

 Higher flow rates possible at higher pilot pressures; consult your local

Vickers sales engineer.

Minimum pilot pressures, DG3/5* valves See under that heading three pages on

Control (swept) volume(s), DG3* and main-stage of DG5* valves:

Center-to-end

End-to-end

11,6 cm

(0.70 in

)

23,2 cm

(1.42 in

)

Hand movement, DG17* valves:

DG17*-H8-*A(L)/*N models

DG17*-H8-*C models

196 mm (7.72 in) nominal

98 mm (3.86 in) nominal

Operating force by hand, DG17* valves, at 280 bar and under

standard test conditions:

DG17*-H8-*A(L) models

DG17*-H8-*C models

DG17*-H8-*N models

190N at 265 L/min (70 USgpm)

240N at 53 0 L/min (14 USgpm)

120N at 265 L/min (70 USgpm)

180N at 530 L/min (140 USgpm)

60N at 265 L/min (70 USgpm)

125N at 530 L/min (140 USgpm)

Voltage ratings, DG5* valves See in “Model Code” on previous page

Continued on next page

Voltage limits, DG5V valves:

Maximum voltage

Minimum voltage

See “Temperature limits” below.

90% of rated voltage

Power consumption, DG5* valves with AC solenoids:

Single-frequency coils, 50 Hz types “A” and “C”

Dual-frequency coils at 50 Hz, types “B” and “D”

Dual-frequency coils at 60 Hz, types “B” and “D”

Initial VA rms Holding VA rms

225 39

265 49

260 48

Power consumption, DG5* valves with DC solenoids 30W at rated voltage and 20C

Relative duty factor, DG5* valves Continuous; ED = 100%

Type of protection, DG5* valves:

ISO 4400 coils with plug fitted correctly

Junction box

Coil winding

Lead wires (coil types “F****”)

Coil encapsulation

IEC 144 class IP65

IEC 144 class IP65 (NEMA 4)

Class H

Class F

Pressure drop characteristics, including metering characteristics

of X* and Y* spools

See two pages on

Response times, DG3* and DG5* valves See “Response Times” section three pages on

Temperature limits:

Fluid temperature limits

Ambient temperature limits:

Minimum ambient, all valves

Maximum ambients, DG5* valves with coils listed in in

“Model Code” two pages back, and under conditions

stated below:

Dual-frequency coils:

at 50 Hz and 107% of rated voltage

at 50 Hz and 110% of rated voltage

at 60 Hz and 107% of rated voltage

at 60 Hz and 110% of rated voltage

Single-frequency (50 Hz) coils at 50 Hz and 110% of

rated voltage

DC coils at 110% of rated voltage

See four pages on.

–20C (–4F)

65C (150F)

70C (158F)

Installation dimensions:

Valves

Mounting surface

Commence five pages on.

See catalog 2425.

Continued on next page

Mass (weight), basic models:

DG3*-H8-*A/D

DG3*-H8-*C

DG5*-H8-*A/B (AC voltages)

DG5*-H8-*A/B (DC voltages)

DG5*-H8-*C/N (AC voltages)

DG5*-H8-*C/N (DC voltages)

DG5*-H8-*D (AC voltages)

DG5*-H8-*D (DC voltages)

DG17*-H8-*A

DG17*-H8-*C/N

kg (lb)approx.

17,0 (37.4)

16,4 (36)

17,6 (38.7)

17,8 (39.1)

18,0 (39.6)

18,5 (40.7)

18,6 (40.9)

19,1 (42.0)

20,7 (45.5)

20,1 (44.2)

 Add 1,1 kg (2.4 lb) when pilot choke adjustment is fitted.

Supporting products:

Subplate

Fastener kit

See catalog 2425.

See catalog 2314 and select appropriate M12 or

-13UNC 6-bolt kit from length options.

Installation and commissioning:

Mounting attitudes, DG3* series

Mounting attitudes, DG5* series

Mounting attitudes, DG17* series

Optional for models shown.

Optional for DG5*-H8-*B(L)/C/D models, but horizontal

mounting is recommended for DG5*-H8-*A(L)/N models.

Optional for DG17*-H8-*A(L)/C, but horizontal mounting is

recommended for DG17*-H8-*N models.

 DG5/17*-H8-*A(L)/N models may be adversely affected by

excessive shock, vibration and/or unusual pressure transients.

After-sales service:

Spare-parts data for DG3/17 and main-stages of DG5 valves,

and pilot choke modules

Spare-parts data for DG4V-3S pilot stages of DG5 valves

Consult your local Vickers representative.

Ask for spares catalog I-3886-S (minimal text, in English).

Maximum Operating Pressures

Model

Ports Max. pressure, bar

DG*S models

30-series

50-series 

DG*V models

10-series

30-series 

DG3*-H8  P, A, B, T, X & Y

210

0,5

–

350

0,5

–

DG5*-H8-**(L)(-**)(-E)(-*)

(externally drained)

P, A, B, T & X

–

210

100 

0,5

–

350 

100 

0,5

DG5*-H8-**(L)(-**)(-E)-T(-*)

(internally drained)

P, A, B & X

–

210

100 

–

350 

100 

DG17*-H8 P, A, B & T

210

–

350

–

 Internal drain option available for all except pressure centered versions

 Important: DG5S, 50 series and DG5V, 30 series two-stage valves have been designed to satisfy the needs of most applications.

Consult your Vickers representative about an alternative model if:

a) Valves are required to remain pressurized for long periods without frequent switching, and /or

b) Back pressure on the drain port of externally drained models (or the tank port of internally drained models) is required to rise above 100 bar.

Minimum Pilot Pressures, DG3* and DG5* Valves

Typical values:

0 300200100

Flow rate

500400

L/min

Minimum pilot pressure

barpsi

100

200

150

100500 150 US gpm

All Spools at Full Stroke and Centered Positions

Selected P ! A.

 Selected P ! B.

 Ports A and B plugged.

Port A plugged.

 Port B plugged.

 Before using at flow rates above 265 L/min (70 USgpm) consult

your local Vickers sales engineer.

 See the two graphs on next page.

Note: Consult your local Vickers sales engineer regarding pressure

drops in the regenerative position of type “52” spool and in all positions

of type “521” spool, not listed here.

0 300100 200

23456

400

700500 600

barpsi

100

200

150

Flow rate

L/min

100500 150 US gpm

250

Pressure drop

Model Spool Curve

DG3*-H8-*A(L) 0, 9

2, 6, 52, 521, X2, Y2

DG3*-H8-*C

DG5*-H8-*C

0, 1, 4, 8, 9, 11

2, 3, 6, 31, 33, 34, 52, 521, X2, Y2, X33, Y33

DG3*-H8-*D

DG5*-H8-*D

0, 1, 4, 8, 9, 11

2, 3, 6, 31, 33, 34, 52, 521, X2, Y2, X33, Y33

DG5*-H8-*A(L) 0, 9

2, 6, 52, 521, X2, Y2

DG5*-H8-*B(L) 0, 4, 8

2, 521, X2, Y2

DG5*-H8-*N 0, 9

2, 6, 52, 521, X2, Y2

Pressure Drop Characteristics

Typical under standard test conditions, i.e. with oil at 21 cSt (105 SUS) and of 0.865

specific gravity. For other viscosities the pressure drops shown below will change

approximately as follows:

Other viscosities (cSt)

32 43 54 65 76 86

% of pressure drop from above table

93 111 119 126 132 137 141

A change to another specific gravity will yield an approximately proportional

change in pressure drop.

The specific gravity of a fluid may be obtained from its producer. Fire-resistant

fluids usually have higher specific gravities than oil.

Spool

type

Flow-direction curve ref.

P ! AB ! TP ! BA ! T P ! T

0 2 5 2 3 4

1 1 2 2 2 5

2 1 2 1 2 –

3 1 2 1 4 –

4 1 4 1 3 6

6 1 4 1 4 –

8 1 4 1 3 6

9 2 4 2 3 –

11 2 2 1 2 5

31 1 4 1 2 –

33 1 2 1 1 –

52 2 – 5 – –

52 – – 5 2 –

X2, X33  2  1 –

Y2, Y33 1  1  –

Metering Characteristics of X2, X33, Y2 and Y33 Spools Used with

Stroke Adjusters

Number of turns of stroke adjuster

screw outwards from spring-centered

spool position

0 300100 200 400 500

“S” type

“R” type

barpsi

100

200

Flow rate

L/min

100500 150 US gpm

300

400

500

600

Pressure drop

300

100

200

400

500

1,0 2,0 3,0 4,0 5,0

X2 and X33

spools,

P³A and P³B

Y2 and Y33

spools,

A³T and B³T

Flow rate (L/min) at

100

125

Flow rate (US gpm) at

∆ p = 10 bar

∆ p = 145 psi

Minimum-Pilot-Pressure Generator Options (“P” port)

Additive to “Pressure Drop Characteristics” graph on previous page.

Response Times, DG3* and DG5* Valves

Taken from when the signal is first applied at the valve until the main-stage spool

completes its travel. Signals are electric for DG5 models or hydraulic for DG3 models.

All are typical under standard test conditions.

Model

Signal Response time (ms) at stated pilot pressure

13 bar 50 bar 100 bar 210 bar 350 bar

(190 psi) (725 psi) (1450 psi) (3000 psi) (5000 psi)

DG3*-H8-2A(L) Select

Return

–

100

105

DG5*-H8-2D Select AC

Return AC

185

110

DG5*-H8-2C Select AC

Select DC

Return AC

Return DC

120

145

Note: Response times are dependent on adequate pilot flow. For control (swept) volumes

see four pages back

Hydraulic Fluids

Materials and seals used in these

valves are compatible with antiwear

hydraulic oils, water-glycols, water-in-oil

emulsions and non-alkyl-based

phosphate esters. The extreme

operating range is 500 to 13 cSt (2270

to 70 SUS) but the recommended

running range is 54 to 13 cSt (245 to

70 SUS). For further technical

information about fluids see leaflet

B-920 or I-286S.

Contamination Control Requirements

Recommendations on contamination

control methods and the selection of

products to control fluid condition are

included in Vickers publication 9132 or

561, “Vickers Guide to Systemic

Contamination Control”. The book also

includes information on the Vickers

concept of “ProActive Maintenance”.

The following recommendations are

based on ISO cleanliness levels at

2 mm, 5 mm and 15 mm. For products in

this catalog the recommended levels

are:

Up to 210 bar (3000 psi) 20/18/15. . . . .

Above 210 bar (3000 psi) 19/17/14. . . .

Fluid Temperatures

For petroleum oil:

Min. –20C (–4F). . . . . . . . . . . . . . . . . .

Max.* +70C (+158F). . . . . . . . . . . . . .

To obtain optimum service life from both

fluid and hydraulic system, 65C (150F)

normally is the maximum temperature.

For other fluids where limits are outside

those of petroleum oil, consult fluid

manufacturer or Vickers representative.

Whatever the actual temperature range,

ensure that viscosities stay within those

specified under “Hydraulic Fluids”.

Solenoid Controlled Models with ISO 4400 (DIN 43650) Electrical Connections

and Pilot Choke

DG5*-H8-**(L)(-*)(-E)(-T)(-*)(-*)-(V)M-U example

For stroke adjusters see next page.

For solenoid identification see two pages on.

For dimensions A, B, C, D and E see two pages on.

 May vary according to plug source.

 Alternative plug positions by loosening

knurled nut counter-clockwise, turning coil

and retightening nut.

Installation Dimensions in mm (inches)

 Cable entry can be positioned at 90

either way from the position shown by

reassembling the contact holder into the

appropriate position inside the plug

connector housing.

Plain manual override or no

manual override; for type “H”

manual override see two

pages on.

13 (0.5) min.

for plug removal

For coil removal:

127

(5.0)

(2.24)

51 (2.0)

40 (1.57)

Mounting surface.

Sealing rings supplied.

(2.32)

57,5

(2.26)

115 (4.53)

117,5 (4.63)

Main port A Main port B

153 (6.0)

77 (3.03)

130,2

(5.126)

53,2

(2.094)

92,1

(3.626)

(2.68)

Main port PMain port T

6 holes, Ø13,5 (0.53) through.

Tighten bolts to 103–127 Nm

(76-93 lbf ft)

Pilot choke adjusters fitted when

Model Code = 2, 3, 27 or 28.

To adjust, turn locknut counter-clockwise,

then turn screw clockwise to slow down rate

of spool travel, or counter-clockwise to

increase the rate. Retighten locknut to

25-30 Nm (18-22 lbf ft).

Locknut

(1.9)



Max. pressure mark location:

“210 bar” for DG*S models

“350 bar” for DG*V models

6,4

(0.25)

2 location pins

Ø6.35 (0.25 dia.)

 

AC models: 45 (1.8)

DC models: 61 (2.4)

For plug options

see four pages on

With pilot

choke fitted:

253 (10.0) 

Without pilot

choke:

213 (8.4) 

D E

3rd angle

projection

69 (2.7)

max.

69 (2.7)

max.

Stroke adjuster fitted this end when

Model Code = 7 or 27

Stroke adjuster fitted this end when

Model Code = 8 or 28

Stroke adjuster fitted both ends when

Model Code = 1 or 3

DG5*-H8-**(L)(-*)(-E)(-T)(-*)(-*)-(V)M-U example

For solenoid identification see next page.

Pilot choke adjusters,

when fitted

Locknut

To adjust:

Turn locknut counter-clockwise, then turn

screw clockwise to shorten stroke, or

counter-clockwise to increase stroke.

Retighten locknut.

M20-6H x 1,5 thread for F(T)J options, or

 NPT for F(T)W options at both ends.

Closure plug fitted at one end.

For other options see in “Model Code”, eight pages

back, and under “NFPA Connector--- ” and “Terminal Strip

and Lights” sections, three pages on.

(3.7)

195,75

(7.7)

50 (2.0) max. over

conduit box cover

Ground connection

Ø4,0 self-tapping screw

Solenoid Controlled Models with Junction Box

having Optional Terminal Strip and Indicator Lights

DG5*-H8-**(L)(-**)(-E)(-T)(-*)(-*)-(V)M-F****(L) example

For solenoid identification see next page.

Available also with other options shown above

and on previous page.



 Ref. “Model Code” :

Codes “FJ” and “FW”: 2 lead wires for each solenoid, approx. 150 (6.0) long.

M3 (#6) terminals provided for customer connection.

Codes “FTJ” and “FTW”: Valve supplied with lead wires connected into terminal strip

suitable for M3 (#6) terminals provided for customer connection.

With pilot choke fitted: 258 (10.2)

Without pilot choke: 218 (8.6)

5 5

Pilot choke adjusters,

when fitted

Pilot Operated Models with Optional

Pilot Choke and/or Stroke Adjusters

DG3*-H8-**(-**)(-**) example

For dimensions D and E see next page.

Stroke adjuster fitted this end when

Model Code = 8 or 28

Stroke adjuster fitted this end when

Model Code = 7 or 27

Stroke adjuster fitted both ends when

Model Code = 1 or 3

69 (2.7)

max.

69 (2.7)

max.

With pilot choke fitted:

192 (7.6)

Without pilot choke:

152 (6.0)

168 (6.6)

D E

Solenoid Controlled Models with Stroke Adjusters

Dimension “A”, “B” or “C”

(see two pages back)

Application:

General use where finger operation is required

(standard manual overrides can only be

operated by using a small tool).

Note: ”H” feature is not field convertible

from other models; specify with order.

Spacer

15 (0.6)

Manual actuation must be

applied within this diameter:

approximately 20 (0.8).

Spacer prevents actuation by

larger device.

Solenoid Identification

Model (see also in “Model Code” ten

pages back)

Spool types Solenoid identity at:

Main port Main port

“A” end “B” end

DG5*-H8-*A/B(-**)(-E)(-T)(-K)(-*)-M All except “4” & “8” – B

DG5*-H8-*A/B(-**)(-E)(-T)(-K)(-*)-VM

All except “4” & “8”

“4” & “8” only

–

DG5*-H8-*AL/BL(-**)(-E)(-T)(-K)(-*)-M All except “4” & “8” A –

DG5*-H8-*AL/BL(-**)(-E)(-T)(-K)(-*)-VM

All except “4” & “8”

“4” & “8” only

–

DG5*-H8-*C/D/N(-**)(-E)(-T)(-K)(-*)-M All except “4” & “8” A B

DG5*-H8-*C/D/N(-**)(-E)(-T)(-K)(-*)-VM All spools B A

Dimensions

Basic model designation

AC models

DC models

C D E

DG3*-H8-*C – – – – – – 135 (5.3) 135 (5.3)

DG3*-H8-*A  – – – – – – 135 (5.3) 198 (7.8)

DG3*-H8-*A(L) 

DG3*-H8-*D

– – – – – – 198 (7.8) 135 (5.3)

DG5*-H8-*A 

DG5*-H8-*B 

DG5*-H8-4/8BL

– 147 (5.8) – – 157 (6.2) – 135 (5.3) 135 (5.3)

DG5*-H8-*AL 

DG5*-H8-*BL 

DG5*-H8-4/8B

– – 147 (5.8) – – 157 (6.2) 135 (5.3) 135 (5.3)

DG5*-H8-*C

DG5*-H8-*N

200 (7.8) – – 220 (8.7) – – 135 (5.3) 135 (5.3)

DG5*-H8-*D 200 (7.8) – – 220 (8.7) – – 198 (7.8) 135 (5.3)

 Not types “4” or “8” spools.

Water-Resistant Manual Override on Solenoids

DG5*-H8-**(-**)(-E)(-T)(-*)-H valves

DG17*-H8-*A illustrated.

DG17*-H8-*AL models differ by

interchange of end caps, and of direction

of flow between positions 1 and 3.

Spring offset models only;

Model Code = A or AL

124

(4.9)

124

(4.9)

405 (16.0)

448

(17.6)

Position 1

Position 2

Position 3

191 (7.5)

324 (12.8)

(2.45)

(3.8)

134 (5.28)

131 (5.16)

152

(6.0)

Ø51 (2.0 dia.)

Hand-Lever Operated Models

Model Flow direction at lever positions

Two-position

detented

Spring centered Spring offset Position 1

(Normal for

DG17*-H8-*A

models)

Position 2

Applies to:

a. Spring centered or two-

position detented models.

b. Spring offset models at

center crossover.

Position 3

(Normal for

DG17*-H8-*AL

models)

DG17*-H8-0N

DG17*-H8-2N

DG17*-H8-4N

DG17*-H8-6N

DG17*-H8-8N

DG17*-H8-33N

DG17*-H8-0C

DG17*-H8-2C

DG17*-H8-4C

DG17*-H8-6C

DG17*-H8-8C

DG17*-H8-33C

DG17*-H8-0A

DG17*-H8-2A

–

DG17*-H8-6A

–

P ! B and A ! T

P ! A and B ! T

P ! B and A ! T

P ! A and B ! T

P ! B and A ! T

P, A and B ! T

P, A and B blocked

P ! T. A and B blocked

P blocked. A and B ! T

P ! T. A and B blocked

P blocked. A and B ! T

P ! A and B ! T

P ! B and A ! T

P ! A and B ! T

P ! B and A ! T

P ! A and B ! T

Electrical Plugs and Connectors for DG5 Valves

Connection details and model type/model code references

5-pin connector

When fitted in single-solenoid

valves, e.g.:

DG5*-H8-*A(L)---FPA5W(L)

DG5*-H8-*B(L)---FPA5W(L)

5-pin connector

When fitted in double-solenoid

valves, e.g.:

DG5*-H8-*C---FPA5W(L)

DG5*-H8-*D---FPA5W(L)

DG5*-H8-*N---FPA5W(L)

3-pin connector

When fitted in single-solenoid

valves, e.g.:

DG5*-H8-*A(L)---FPA3W(L)

DG5*-H8-*B(L)---FPA3W(L)

Warning tag:

“Electrical power must

be disconnected before

removing or replacing

electrical plug”

-16 UN-2A thread

16,0 (0.62)

68,75

(2.71)

1-lead

(to solenoid “B”)

3-green lead

(ground)

5-lead

(to solenoid “B”)

2-lead

(to solenoid “A”)

4-lead

(to solenoid “A”)

3-lead

(to solenoid)

1-green lead

(ground)

2-lead

(to solenoid)

25,4 (1.0) hex.

1-lead

(to solenoid)

3-green lead

(ground)

5-lead

(to solenoid)

2-lead

(capped)

4-lead (capped)

Plugs for ISO 4400 (DIN 43650) Type

Coil Connection

For valves with type “U” coils

The cable entry on these plugs can be

repositioned at 90 intervals by

reassembly of the contact holder relative

to the plug housing.

The cable entry is Pg.11, for cable

Ø 6-10 mm.

Order separately by part number.

Plugs without indicator lights

Part no.

Color Use on solenoid coil

710775 Black Sol. B

710776 Gray Sol. A

Plugs with indicator lights

Voltage Part no.

Gray

(sol. A)

Black

(sol. B)

12- 24V 977467 977466

100-125V 977469 977468

200-240V 977471 977470

NFPA Connector T3.5.29-1980

DG5*-H8-**(**)---FPA3W(L) and

DG5*-H8-**(**)---FPA5W(L) models

The receptacle is a standard three or

five-pole connector with shortened leads

and terminals added. The five-pole plug

has four leads 101,6 mm long and one

of 177,8 mm length. All wires have US

Underwriters Laboratory-recognized

non-solder insulated eyelet terminals.

The green wire is used for the ground

(earth) connection (No. 8-size screw

furnished). Valves are supplied

prewired.

DG5*-H8-**(L)---F****-* DG5*-H8-**(L)---F****L-*

 1. For DC coils the +ve lead(s) must be

connected to the terminal(s) marked +.

When using 3-wire incoming leads to

double solenoid valves (i.e. common

neutral) the inner pair of terminals must

be linked.

2. For correct light indication of energized

solenoid ensure that solenoid leads are

correctly connected: light terminals are

common with each outer pair of solenoid

terminals according to the side with +

mark.

Terminal strip (part number 890345)

clips to cover and can be field-fitted

M3 x 0,5-6H screws (part

number 186006) 2 each end

Connections to solenoid A

(or B, according to model type) 

Connections to solenoid B

(or A, according to model type) 

Rubber gasket

Conduit box cover and nameplate

complete with sealing gasket and

4 screws

Anti-rotation tab ensures

correct orientation of cover

to junction box

28,50

(1.12)

30,00

(1.18)

Lights

2 lenses in cover

4 terminal screws M3 x 0,5-6H

(part number 02-113355)

Terminal Strip and Light Options

When fitted in solenoid controlled valves DG5*-H8-**(L)---F****(L).