KCG-6 Valve with Type “U” Coil Connection

This product has been designed and tested to meet specific standards outlined in the European Electromagnetic

Compatibility Directive (EMC) 89/336/EEC, amended by 91/263/EEC, 92/31/EEC and 93/68/EEC, article 5. For

instructions on installation requirements to achieve effective protection levels, see this leaflet, the Installation

Wiring Practices for Vickers Electronic Products leaflet 2468 and leaflet 02-123931A which is packed with every

KA valve. Wiring practices relevant to this Directive are indicated by Electromagnetic Compatibility (EMC).

GB-2324DRevised 10/97

K(A)CG-6/8, 1* Series

Basic Characteristics

Max. pressure 350 bar (5000 psi). . . . . .

Max. flow rate 400 L/min (106 USgpm).

Mounting face to ISO 6264:

For K(A)CG-6 AR-06-2-A. . . . . . . . . . . . .

For K(A)CG-8 AS-08-2-A. . . . . . . . . . . . .

General Description

These two-stage pressure relief valves

(based on Vickers type CG2V valves

featured in catalog 2323) offer extensive

application possibilities through their

ability to control the pressure setting in

proportion to an applied electrical input

(up to a pressure limit which is manually

adjustable and lockable).

Two model types are available

KCG-6/8

The valve responds to variations of

current input to its solenoid, for which

separate Vickers drive amplifiers, with

PWM output stage and output current

control, are available.

The proportional pilot control stage is a

Vickers type KCG-3 valve, described in

catalog 2162.

KACG-3

The addition of an integral amplifier

allows the pressure to be controlled from

a 0 to +10V, or 0 to –10V command

signal range. The amplifier is mounted in

a robust metal housing and electrical

connections are via an industry standard

7-pin plug. Factory-set adjustments

ensure high reproducibility valve

-to-valve.

Features and Benefits

 With or without integrated electronics.

 Remote electrical proportional control

of pressure from a choice of five

pressure ranges per valve size.

 Excellent repeatability and stable

performance results from cartridge

design of mainstage elements.

 Low installed cost and space

requirement from high power/size

ratios (more than double that of many

conventional designs).

Proportional Pressure Relief Valves

VICKERS

Proportional Valves

TPX

KCG-6/8 with manual and electrical

pilots internally drained to port T:

Model code = Blank

KCG-6/8 with manual and electrical

pilots drained to side drain port :

Model code = 1

TPX

Side

drain

port u

 Tapped port on side of pilot head.

KCG-6/8 with manual pilot internally

drained to port T; electrical pilot

drained to side drain port :

Model code = 3

Side

drain

port u

TPX

 Tapped port on side of pilot head.

TPX

KACG-6/8 with manual and electrical

pilots internally drained to port T:

Model code = Blank

KACG-6/8 with manual and electrical

pilots drained to side drain port :

Model code = 1

TPX

Side

drain

port u

 Tapped port on side of pilot head.

KACG-6/8 with manual pilot

internally drained to port T; electrical

pilot drained to side drain port :

Model code = 3

Side

drain

port u

TPX

 Tapped port on side of pilot head.

7-pin plug

Functional Symbols

Pilot drain options

See also “Functional Symbols”

Code Drain routing:

Manual Electrical

pilot stage pilot stage

Blank Port T Port T

1 Side port Side port

3 Port T Side port

Standard features

Z-M = For KCG-6/8 and KACG-6/8

Coil connection type (KCG

only)

U = ISO 4400 (DIN43650)

interface

FW = Flying-leads in wiring box

tapped

 NPT

FTW= As “FW” plus terminal strip

FJ = Flying-leads in wiring box

tapped M20

FTJ = As “FJ” plus terminal strip

P = Plug-in coil (type “H” only)

Use with “EN46”

 Female connector to be supplied

by user.

Connections (KACG only)

PD7 = 7 pin connector with plastic

plug.

See Warning note regarding CE

compliance on pageNO TAG

(F3-)KCG-* * *** -1*

2 9 12

- -*- Z-M- ***

***

(-EN46)

Fluid compatibility

Blank = Antiwear hydraulic oil

(class L-HM)

F3 = As above or phosphate ester

(class L-HFD)

Valve type

KC = Proportional pressure relief

KAC= Proportional pressure relief

with integral amplifier

Mounting type

G= Subplate mounted

Mounting surface, ISO 6264

6 = AR-06-2-A

8 = AS-08-2-A

Type of manual adjustment

K = Micrometer with keylock

M = Micrometer without keylock

W = Screw/locknut

Pressure adjustment control

range

(All coils except type HJ, see

position , footnote  )

40 = 6 - 40 bar (87 - 580 psi)

100 = 7,75 - 100 bar (112 - 1450 psi)

160 = 8,5 - 160 bar (125 - 2300 psi)

250 = 8,5 - 250 bar (125 - 3600 psi)

350 = 9,0 - 350 bar (130 - 5000 psi)

Coil rating

Code = amps x ohms

G1 = 3,5 x 1,65

GP1 = 3,0 x 2,0

H1 = 1,6 x 7,3

HA1 = 0,94 x 22

HJ1 = 1,0 x 14,25

HL1 = 0,80 x 29

 Resistance at 20C (68F).

 KACG valves must have H1 coils

l For valves replacing CGEV models.

 This lower power coil is limited to

the following maximum controlled

pressures. Valves supplied with type

HJ coils will be stamped with the

applicable maximum controlled

pressure.

Model code Max. pressure

position with HJ coil

40 35 bar (500 psi)

100 85 bar (1100 psi)

160 140 bar (2000 psi)

250 210 bar (3000 psi)

350 315 bar (4500 psi)

Design number, 1* series

Subject to change. Installation

dimensions unaltered for design

numbers 10 to 19 inclusive.

Special features

EN46 used with P-type coil connection

and Uniplug connector.

Omit if not required.

Features in brackets () may be omitted. All other features must be specified.

(F3-)KACG- * * *** -1*

- -*- Z-M-PD7

5 7

8 11

Models requiring separate amplifiers

Models with integral amplifier

Model Code

Operating Data

Standard test conditions are with antiwear hydraulic oil at 36 cSt (168 SUS) and 50C (122F)

Maximum pressures:

Ports P and X

Port T in K(A)CG-*-****-Z- valves

Port T in K(A)CG-*-****-1/3-Z- valves

Side drain port

s Back pressure at these ports additive to the pressure

setting of the valve.

350 bar (5000 psi)

2 bar (30 psi)

350 bar (5000 psi)

2 bar (30 psi)

Rated flow at Dp = 6 bar (87 psi):

K(A)CG-6

K(A)CG-8

200 L/min (52.8 USgpm)

400 L/min (105.7 USgpm)

Vent flow with valve at rated flow

 See “Venting”, page 6.

1 L/min (0.26 USgpm)

Pilot control drain flow, when valve is limiting system

pressure, i.e. flow P to T occurring:

K(A)CG-6

K(A)CG-8

1,3 L/min (0.34 USgpm)

2,0 L/min (0.53 USgpm)

Coil or amplifier rating:

KCG models

KACG models

See in “Model Code”

24V x 40W max. (22 to 36V including 10% pk. to pk. max. ripple)

Command signal ranges, KACG models 0 to +10V DC, or 0 to –10V DC

Dither, KACG models Factory set, not user adjustable

Monitor point signal, KACG models 0,5V per amp. solenoid current

Power stage PWM, KACG models 2kHz nominal

7-pin plug connections, KACG models:

Power supply +ve

Power 0V

Signal 0V

+ve voltage command signal

–ve voltage cpommand signal

Monitor output

Protective ground

Electro-magnetic compatibility (EMC)

KACG models only:

Emission (10V/m)

Immunity (10V/m)

EN 50081-2

EN 50082-2

Pressure gain, KACG models

Factory setting - Maximum with 10V command signal.

User adjustment - 30 to 120% of factory setting.

Note that altering this setting will affect valve to valve

interchangeability.

See graph

Pressure override when relieving and when off-load See graphs

Hysteresis

KCG models

KACG models

<5% (with 100 mA pk.-to-pk. dither)

<6% (with factory-set dither)

Linearity, between 10% and 100% of rated pressure:

K(A)CG-6 models at 100 L/min (26 USgpm)

K(A)CG-8 models at 200 L/min (52 USgpm)

<6%

Operating Data

Repeatability

<1,3% of rated pressure

Protection, Electrical (KACG models) Reverse-polarity protected

Mass (weight)

KCG-6

KACG-6

KCG-8

KACG-8

4,9 kg (10.8 lb)

5,3 kg (11.7 lb)

5,8 kg (12.8 lb)

6,2 kg (13.7 lb)

Supporting products:

Amplifiers for KCG valves with “H” type coils only:

EHH-AMP-724-C/D-10 (Uniplug)

EHH-AMP-7*2 series (power plug)

EEA-PAM-513-A-14 (1 adjustable ramp)

EEA-PAM-513-A-3* (2 adjustable ramps)

Auxilliary electronic modules (Din-rail mounting) for

KACG models:

EHA CON 201 A 2* signal converter

EHD DSG 201 A 1* command signal generator

EHA RMP 201 A 2* ramp generator

EHA PID 201 A 2* PID controller

EHA PSU 201 A 1* power supply

ISO 4400 (DIN 43650) electrical connector:

Black, marked “B”

Gray, marked “A”

Subplates, size 03

Mounting bolts

 Note: If not using Vickers recommended bolt kits, bolts

must be to ISO 898 grade 12.9 or stronger.

See catalog 2367

See catalogs 2114, 2115 and 2282

See catalog 2137

See catalog 2464

See catalog 2410B

See catalog 2470

See catalog 2410B

See catalog 2427

See catalog 2410B

Part number 710775

Part number 710776

See catalog 2425

See catalog 2314A

Installation and start-up (commissioning):

Installation and start-up (commissioning) guide

Mounting attitude

ML-B-9133B (Multi-lingual English, German, French and Italian),

shipped with each product and also available separately on

request.

No restriction, provided that the valve is kept full of fluid through

port T.

Ordering procedure Valves, subplates, bolt kits and Vickers amplifiers should be

ordered by full model code designation. Order ISO (DIN)

electrical connectors by part number.

Performance Data

Typical with oil at 36 cSt (168 SUS) and at 50C (122F)

100

150

200

250

300

350

bar

1000

2000

3000

4000

5000

psi

Flow rate

KCG-8

KCG-6

100 200 400

20 40 60 80

L/min

USgpm

0 10 20 30 40

L/min

USgpm

40 80 120 160

300

100

200

Pressure

bar

100

125

psi

100 200 300 L/min

0 20 40 60 80 USgpm

Flow rate

Pressure Override Off-Load

Graphs show the minimum pressures

obtainable:

a) With 0 mA current to the solenoid

coil

b) When the valve is vented (see

following explanation).

Venting

When the vent port X (or alternative

vent port in the valve body) is

connected to the reservoir via a

suitable 2-way pilot valve, the

mainstage of the relief valve opens to

allow full flow from P to T at low

pressure drop. The minimum pressure

drop is obtained when the pilot valve is

also de-energized. The total pressure

drop through the venting 2-way valve

and pipework is additive to the

pressure at P.

While the valve is vented the system

pressure cannot be controlled via the

proportional solenoid.

This control feature is frequently used

during off-load periods in machine

cycle times. If lower off-load system

pressures are required then additional

full flow unloading valves are

recommended, e.g. Vickers CV series

cartridge valves.

Note: All valves are with pilot valve

de-energized.

bar

100

125

150

psi

50 100 150 200 L/min

02040

USgpm

Flow rate

Valve pressure drop

K(A)CG-6*-160/250/350

K(A)CG-6*-100

K(A)CG-6*-40

(also K(A)CG-6*-350 vented)

K(A)CG-6*-40

vented

K(A)CG-6

K(A)CG-8

150

400

100

Valve pressure drop

K(A)CG-8*-350

K(A)CG-8*-160/250

K(A)CG-8*-100 K(A)CG-8*-40

(also K(A)CG-8-350 vented)

K(A)CG-8*-40

vented

503010

Pressure Override when Relieving

Model

Curve number

123456789

K(A)CG-**-40

K(A)CG-**-100

K(A)CG-**-160

K(A)CG-**-250

K(A)CG-**-350



Valid for models driven from Vickers

amplifier with appropriate settings of

gain and offset

0 10 20 30 40 50 60 70 80 90 100%

100

150

200

250

300

bar

1000

2000

3000

4000

psi

Pressure

% max. solenoid current

Pressure Gain

Step Response

KACG models with factory settings of gain and offset.

KCG models driven from Vickers amplifier with

appropriate settings of gain and offset.

Test method

1. Trapped volume between pump and

test valve, as in table.

2. Flow rate set at pump, as in table.

3. Response = time from step input

signal until pressure reaches 90% of

step change, as measured by

transducer.

Valve

size

Test conditions:

Trapped volume

Flow rate

Step size:

Pressure

demand

Response

time (ms)

6 2,0 liters

(0.53 USg)

100 L/min

(26 USgpm)

0 to 100%

100% to 0

25 to 100%

100 to 25%

100

8 4,0 liters

(1.06 USg)

200 L/min

(52 USgpm)

0 to 100%

100% to 0

25 to 100%

100 to 25%

110

Wiring

Connections must be made via the 7-pin

plug mounted on the amplifier.

Recommended cable sizes are:

Power cables:

For 24V supply

0,75 mm

(18 AWG) up to 20m (65 ft)

1,00 mm

(17 AWG) up to 40m (130 ft)

Signal cables:

0,50 mm

(20 AWG)

Screen:

A suitable cable would have 7 cores, a

separate screen for the signal wires and an

overall screen.

See wiring connection diagram on page

NO TAG

Gain

Modulator

+15V

Valve envelope

7-pin plug con-

nections

+24V

Power 0V

Signal 0V

Protective ground

Positive

Monitor output

Negative

Command

signal

voltage

(see table)

–15V

Solenoid drive

Dither

Warning

All power must be switched

off before connecting or

disconnecting any plugs.

Minimum

Pressure

KACG-6/8 Electrical Block Diagram

KACG-6/8 Typical Connection Arrangements

Warning

Do not ground pin C. If the

local ground (pin C) is not used for

differential monitor electronics, do not use.

Read monitor pin F with respect to ground.

User panel

Outer

Screen

“KA” valve

D or E

E or D

C

+24V

Demand

Signal

Solenoid

Current

Monitor

Power

Supply

Enclosure

Valve must

be connected

to ground via

subplate

Input

+/– 10V

Connector shell

 Solenoid current monitor voltage (pin F)

will be referenced to the KA valve local

ground. A “local ground” (pin C) is

provided for optional use by differential

input customer supplied electronics.

Wiring Connections for Valves with integral Amplifier

 Note: In applications where the valve

must conform to European RFI/EMC

regulations, the outer screen (shield) must

be connected to the outer shell of the

7-pin connector and the valve body must

be fastened to the earth ground. Proper

earth grounding practices must be

observed in this case, as any differences

in command source and valve ground

potentials will result in a screen (shield)

ground loop.



0V must be

connected

to ground

Warning

Electromagnetic Compatibility (EMC)

It is necessary to ensure that the valve is wired-up as above. For effective protection, the user

electrical cabinet, the valve subplate or manifold, and the cable screens should be connected to

efficient ground points. The metal 7-point connector, part no. 934939, should be used for the

integral amplifier.

In all cases, both valve and cable should be kept as far as possible from any sources of

electromagnetic radiation such as cables carrying heavy current, relays and certain kinds of

portable radio transmitters, etc. Difficult environments could mean that extra screening may be

necessary to avoid the interference.

It is important to connect the 0V lines as shown above. The multi-core cable should have at least

two screens to separate the demand signal and monitor output from the power lines.

Drain wire

Inner screen

Installation Dimensions in mm (inches)

62

45,0 (1.8) for

removal of

protective cap

7,5 (0.29) A/F

Turn clockwise to

increase pressure setting

Locknut 17,0

(0.67) A/F

16,0 (0.63)

(

 BSPF) alternative vent

port. Remove plug for access.

Port X

(vent port)

Port P

pressure

inlet

Port T

outlet to

reservoir

77,5

(3.1)

186,0

(7.3) 

13,0 (0.5) for

plug removal 

178,0 (7.07) for KCG-6

184,0 (7.2) for KCG-8

61,0 (2.4) for

coil removal

Side drain port G

(

 BSPF)

(see “Functional Symbols” section)

View “A-A”





Type K only:

43,0 (1.7) for

key removal

Micrometer Adjustment Options:

“K” or “M” in Model Code

“K” Feature:

To adjust pressure setting, insert key and turn

clockwise. Turn micrometer knob clockwise to

increase pressure setting; counter-clockwise to

decrease setting. When the key is removed the knob

can spin freely without affecting the pressure setting.

Mainstage overall dimension

with adjuster knob fully out:

196,0 (7.7) for KCG-6 models

203,0 (8.0) for KCG-8 models

 Alternative plug positions by loosening knurled nut

counter-clockwise, turning coil and re-tightening nut.

 Dimensions may vary according to source of plug.

 The cable entry on this plug can be repositioned at 90

intervals by reassembly of the contact holder relative to the

plug housing. The cable entry is Pg 11 for cables Ø6-10 mm

(0.24-0.4 dia).

3rd angle

projection

KCG-* Models with “U” Type Coil Connection:

“U” at Model Code

Model

A B C D E rad ØF (dia)

KCG-6 58,0

(2.3)

35,0

(1.4)

68,0

(2.7)

35,0

(1.4)

12,0

(0.5)

20,0

(0.78)

KCG-8 42,0

(1.7)

39,0

(1.54)

83,0

(3.3)

30,0

(1.2)

16,0

(0.63)

26,0

(1.02)

Model G H ØJ (dia) K L

KCG-6 79,0

(3.1)

82,0

(3.23)

13,5

(0.53)

176,0

(7.0)

20,0

(0.78)

KCG-8 103,0

(4.1)

106,0

(4.2)

17,0

(0.7)

183,0

(7.2)

25,0

(1.0)

3rd angle

projection

190,0

(7.5)

178,0 (7.07) for KCG-6

184,0 (7.2) for KCG-8

61,0 (2.4) for

coil removal



Ground (earth) connection

Ø4,0 (0.16 dia) self-tapping

screw

Conduit entry both ends, see

“Model Code” for thread type.

Closure plug fitted to one end.

 Ref. Model Code :

Codes “FJ” and “FW”: 2 lead wires approx. 150.0 (6.0) long.

M3 terminals provided for customer connection.

Codes “FTJ” and “FTW”: Lead wires connected into terminal

strip suitable for M3 terminals on customer connection.

184,0

(7.3)

178,0 (7.07) for KCG-6

184,0 (7.2) for KCG-8

61,0 (2.4) for

coil removal

UNIPLUG connector

correctly assembled

to KCG-3 valve

KCG-*---EN46 Models for Use with Vickers

UNIPLUG, Single Cable Connector:

“P” at Model Code ; “H” at Model Code

For use with Vickers single-cable UNIPLUG connectors:

For “Soft Switch” Control:

Use UNIPLUG model type EHH-AMP-724-C**-1*

For Proportional Control:

Use UNIPLUG model type EHH-AMP-724-D**-1*

UNIPLUG connectors should be ordered separately;

see catalog 2367.

To fit UNIPLUG connector to KCG-3 pilot valve:

Unscrew coil retention nut and remove coil.

Slide UNIPLUG connector onto dummy pins (at non-solenoid

end) then replace coil, ensuring pins are fully engaged.

Replace and tighten coil retention nut.

For dimensions not shown see page 10.

9 11

KCG-* Models with “F” Type Coil Connection:

“F(T)W” or“F(T)J” at Model Code

Remove plug for access to

minimum-pressure

potentiometer.

227,0 (8.9)

7-pin plug

Remove plug for

access to the gain

potentiometer

Do not

remove

this plug.

To bleed air, loosen plug

in end of core tube;

re-tighten after bleeding

is complete.

40,0

(1.6)

KACG-* Models (With integrated amplifier)

Metal plug 934939

Cable outside diameter 8,0 to 10,5 (0.31 to 0.41)

Must be used for full EMC protection. See also warning

note below

Plastic plug 694534

PG11. Cable maximum outside diameter 11,0 (0.43)

25,0

(1.0)

224,5

(8.8)

6,6

(0.26)

Warning

To conform to the EC Electromagnetic Compatibility directive (EMC) this KACG valve must be fitted with a metal 7-pin

plug. The screen of the cable must be securely connected to the shell of the metal connector. A suitable IP67 rated

connector is available from Vickers, part no. 934939. Alternatively a non IP67 rated connector is available from

ITT-Cannon, part no.CA 02 COM-E 14S A7 P.

Additionally the cable must be fitted with a ferrite EMC suppression core not more than 4cm from the connector

referred to above. Suitable types include Farnell 535-898 or Farnell 535-904 which snap fit over the cable.

The plastic plug, part number 694534, is only suitable for use in a sealed electromagnetic environment or outside of

the European Community.

M (min.)

A (min.)

B (min.)

D (min.)

K (min.)

Q (min.)

Ø 7,5 (0.29 dia) x 6,0

(0.24) deep min.

Plug or omit if this vent/hydraulic

remote port is not to be used

55,0

(2.2)

21,0 (0.83)

2 ports, G1 (1 BSPF) x 19,0 (0.75)

min. depth full thread, from underside

Ø 7,5 (0.29 dia) x 6,0 (0.24)

deep, for valve locating pin

4 holes, Ø 11,0 (0.43 dia) through,

Ø 17,5 (0.68 dia) spotface

(

 BSPF) x 12,0 (0.47)

min. depth full thread, from

underside

4 holes tapped M12 x 21,0

(0.82) min. depth full thread

24,0

(0.95)

132,0 (5.2)

80,0

(3.15)

125,0 (5.0)

101,0

(4.0)

68,5

(2.7)

26,9

(1.06)

7,0

(0.27)

56,0 (2.2)

21,7

(0.85)

150,0 (6.0)

20,0 (0.79)

CGVM-6-10-R Subplate

Mounting Surfaces, ISO 6264

AR-06-2-A

AS-08-2-A

When a subplate is not used, a raised

pad must be provided for mounting. The

pad must be flat within 0,001 mm/

100 mm (0.0001/10) and smooth

within 0,8 mm (32 min). Dimensional

tolerances are "0,2 mm (" 0.008)

except where indicated.

Port functions:

P = Pressure inlet

T = Outlet to reservoir

X = Vent, or remote control port

Size

A B C D E F H J K L

AR-06

AS-08

80 (3.2)

118 (4.7)

13,1 (0.5)

35,0 (1.4)

53,8 (2.12)

66,7 (2.63)

13,1 (0.5)

16,3 (0.7)

47,5 (1.87)

55,6 (2.19)

22,1 (0.87)

33,4 (1.35)

22,1 (0.87)

11,1 (0.44)

23,8 (0.94)

13,1 (0.5)

16,0 (0.63)

53,8 (2.12)

70,0 (2.76)

Size M N ØP (dia) Q ØT (dia) ØX (dia) Y thread x min. full thread depth

AR-06

AS-08

13,1 (0.5)

16,0 (0.63)

26,9 (1.06)

35,0 (1.38)

14,7 (0.58)

23,4 (0.92)

80 (3.2)

102 (4.0)

14,7 (0.58)

23,4 (0.92)

4,8 (0.19)

6,3 (0.25)

M12 x 21 (

 UNF x 0.83)

M16 x 30 (

 UNF x 1.2)

 Tolerance on bolt and pin locations"0,1 mm ("0.004).

 These ISO standard dimensions can be used, but improved flow paths to and from

valve are obtained by using 48,0 (1.89) instead of 47,5 (1.87), and 22,6 (0.89)

instead of 22,1 (0.87).

 ISO standard does not give UNC bolt sizes. These are recommended equivalents

to metric sizes specified in the standard.

Further Information

Hydraulic Fluids

Materials and seals used in these valves

are compatible with:

Anti-wear petroleum oils L-HM. . . . . . . .

For use with non-alkyl based

phosphate esters, L-HFD, use F3

version in model code.

The extreme operating range is 500 to

13 cSt (270 to 70 SUS) but the

recommended running range is 54 to

13 cSt (245 to 70 SUS). For further

technical information about fluids see

694

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) 18/16/13. . . . .

Above 210 bar (3000 psi) 17/15/12. . . .

Installation and Start-up Guidelines

The proportional valves in this catalog

can be mounted in any attitude but it

may be necessary, in certain demanding

applications, to ensure that the

solenoids are kept full of hydraulic fluid.

If this proves to be the case any

accumulated air can be bled from the

solenoid bleed screw. This task is easier

if the valve has been mounted base

downwards. Good installation practice

dictates that the tank port, and any drain

port, are piped so as to keep the valve

full of fluid once the system start-up has

been completed.

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”.

Ambient for:

Valves at full performance specification:

–20 to +60C (–4 to +140F).

Valves, as above, will operate at

temperatures of 0 to –20C (32 to –4F)

but with a reduced dynamic response.

Storage:

–25 to +85C (–13 to +185F)

Eurocard electronics:

0 to 50C (32 to 122F)

Seal Kits

Pilot valves:

K(A)CG-3 (KA + DIN) 02-138201. . . . .

KCG-3 (’F’ & ’P’ versions) 02-145869. .

Mainstage valves:

K(A)CG-6 614824

K(A)CG-8 614931