Typical Section

Typical PCG5V model with internally drained pilot piston

February 1996 GB-2329A

PCGV-6/8, 10 Series; PCG5V-6/8, 20 Series

Basic Characteristics

Max. operating pressure 350 bar . . . . . .

(5000 psi)

Max. flow rates:

PCG(5)V-6 150 L/min (40 USgpm). . . .

PCG(5)V-8 300 L/min (80 USgpm). . . .

Mounting surfaces to ISO 5781:

PCG(5)V-6 AG-06-2-A. . . . . . . . . . . . . . .

PCG(5)V-8 AH-08-2-A. . . . . . . . . . . . . . .

General Description

These pilot operated check valves

operate as a direct check valve but can

also be opened by pilot pressure, on the

control piston, to permit free reverse

flow. The amount of pilot pressure

required to open the valve is stated as a

ratio of the pressure above the check to

the pilot pressure.

Two basic types of valve are available

relative to the piloting method. The

PCGV model is the traditional type

requiring an external remote pilot valve

to control the admission and release of

pressure to the pilot piston. The other,

the PCG5V model, has a fitted

solenoid-operated pilot valve that

obviates a separate mounting and can

include manual override(s) for local

emergency control. The PCG5V type

can take its hydraulic pilot supply from

the load pressure in the adjacent

cylinder under control or from a remote

source. Where cylinder pressure is to be

used and where even the minimal

internal leakage through the closed pilot

valve would cause an unacceptable

amount of cylinder “creep”, a Vickers

poppet-type pilot valve can be

substituted. This pilot would be a model

DG3VP-3-103A (see catalog 642); ask

your Vickers representative for advice.

All PCG(5)V valves are available with or

without an integral decompression

feature.

Features and Benefits

 Less power wastage from low

pressure drops.

 Smooth steady lowering of heavy

weights in conjunction with flow

control valves aided by use of

externally drained models.

 Zero-leakage design to prevent

actuator “creep” from check valve

leakage.

 Smooth release of stored energy by

using models with decompression

poppets.

 Extra-fast response from solenoid

piloted models using actuator-

supplied pilot pressure instead of

remote external source.

 International standard mountings

permit fitment on many existing

installations.

 Reduced installed cost and space

results from higher power/weight

ratios.

Operation of both types of valve is

portrayed in the “Functional Symbols”

section, whilst the following sectional

illustration shows the construction of the

solenoid controlled type. The remote

piloted type operates and can be used

in the same ways as the previous 4CG

models described in the Vickers

“Industrial Hydraulics Manual”. The

solenoid pilot directional control valve

option is basically the same as the

single solenoid directional valve shown

in the same manual.

Pilot Operated Check Valves

Vickers

Check Valves

Pilot operated check valve with

externally drained pilot piston,

PCGV-**(D)-1-10 model

Solenoid controlled pilot operated check

valve with internally drained pilot piston,

PCG5V-**(D), 11 and 20 series

Solenoid controlled pilot operated check

valve with externally drained pilot piston,

PCG5V-**(D)-1, 11 and 20 series

XA B

XA B Y

XYA B

Features in brackets ( ) may be omitted if not required. All other features must be

specified.

Basic Models (Without Integral Solenoid Pilot Valve)

(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)

Mounting surface ISO 5781

6 = Code AG-06-2-A

8 = Code AH-08-2-A

Cracking pressure

A = 2 bar (29 psi)

C = 5 bar (73 psi)

F = 10 bar (145 psi)

Decompression feature

Omit if not required

External drain option

1 = Externally drained pilot piston

Omit for internally drained pilot piston

Manual override options

Override option in solenoid end only.

Blank = Plain manual override

H = Water-resistant override,

DC solenoid only

Z = No override

Solenoid identity method

V = Solenoid “A” at port A end of pilot

valve; solenoid “B” at B end of

pilot valve (German practice).

Omit for solenoid identity to USA ANSI

B93.9 standard, i.e. energize solenoid

“A” for P to A; solenoid “B” for P to B.

PCGV- * -1*

1 2 3 4 11

(-1)

Models With Integral Solenoid Pilot Valve

(F3-) PCG5V

1 2 3 4 9

(D)(-1) -(V)M- *** (L)- * -2*

5 7 8 10 11

Solenoid connection type 

U = ISO 4400 (DIN 43650) on coil 

FW =

 NPT thread conduit box

FTW =

 NPT thread conduit box

and terminal strip

FJ = M20 thread conduit box

FTJ = M20 thread conduit box and

terminal strip

 Other connection types as shown in

catalog 2015 (DG4V-3/3S) may be made

available depending on quantities.

 Female connector to be supplied by user.

Indicator lights

Option for solenoid connection types

F(T)W and F(T)J

L = Lights fitted

Omit if lights not required

For U type coil, use plug with integral

light, see 7 pages on.

Coil rating

A = 110V AC

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.

Design number

10 series for PCGV models

20 series for PCG5V models

Subject to change. Installation

dimensions unaltered for design

numbers 10-19 and 20-29 respectively.

* - (D)

-** - -E-*

Functional Symbols

Examples:

Pilot operated check valve with

internally drained pilot piston,

PCGV-**(D)-10 model

Model Code

Operating Data

Typical with petroleum oil at 21 cSt (102 SUS) and at 50C (122F).

Maximum pressures:

Ports A, B and X

Port Y :

PCGV, 10 series

PCG5V, 20 series

Normally drained directly to the reservoir. For fast closure of valves

under low load pressure conditions use the external drain option

(“1” at model code ). For PCGV models apply pressure to port Y to

retract the pilot piston.

350 bar (5000 psi)

100 bar (1500 psi)

PCG5V, 20 series valves are 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 port Y is required to rise above 100 bar (1500 psi)

Maximum flow rates:

PCG(5)V-6

PCG(5)V-8

150 L/min (40 USgpm)

300 L/min (80 USgpm)

Cracking pressures See “Model Code”

Pilot piston area ratios

Without decompression feature:

All models

With decompression feature (“D” at model code ):

PCG(5)V-6 models

PCG(5)V-8 models

3,5:1

33,8:1

52,6:1

Pilot pressure See page 5

Pressure drops See next page

Electrical Data for PCG5V Models

Coil voltages See “Model Code”

Permissible voltage fluctuation:

Maximum

Minimum

See “Temperature Limits”, page 5

90% of rated voltage, see “Model Code”

Relative duty factor Continuous, ED = 100%

Types of protection:

ISO 4400 coils with plug fitted correctly

Conduit box

Coil winding

Lead wires (coils type F**)

Coil encapsulation

IEC144, class IP65

Class H

Class F

Power consumption for coils listed in “Model Code” :

AC coils:

Types A, C at 50 Hz

Types B, D at 50 Hz

Types B, D at 60 Hz

DC coils:

Initial  Holding

VA (rms) VA (rms)

225 39

265 49

260 48

30W –

1st half cycle; solenoid armature fully retracted.

PCG(5)V-6 models

PCG(5)V-8 models

Port B to A, piloted open Curve 1. . . . .

Port A to B, no pilot pressure:

PCG(5)V-*A models Curve 2. . . . . . . . .

PCG(5)V-*C models Curve 3. . . . . . . . .

PCG(5)V-*F models Curve 4. . . . . . . . .

50 100 150

010203040

L/min

USgpm

100

200

300

psi

bar

Flow rate

Pressure drop

0 50 100 150 200 250 300

20 40 60 80

L/min

USgpm

bar

100

200

300

400

psi

Flow rate

Pressure drop

Performance Characteristics

Typical with petroleum oil at

21 cSt (102 SUS) and at 50C (122F)

unless stated otherwise.

Pressure Drops

For internally drained pilot piston models, no symbol at model code :

Pilot pressure P

– P

Area ratio

+ P

For externally drained pilot piston models, “1” at model code :

Pilot pressure P

Area ratio

+ 0,85 P

Pilot Pressure

The pilot pressure required to open the

check valve or decompression poppet is

stated as a ratio of the pressure on the

check (port B) to the pilot pressure. To

determine the required pilot pressure the

following formulae should be used.

These are valid for pressures calculated

in either bar or psi, using the appropriate

“C” factor.

Hydraulic Fluids

All valves can be used with:

Antiwear hydraulic oils (class L-HM)

Invert emulsions (class L-HFB)

Water glycol (class L-HFC)

Phosphate ester (class L-HFD), adding

“F3-” prefix at model code .

The extreme viscosity range is from

500 to 13 cSt (2270 to 70 SUS) but the

recommended range is 54 to 13 cSt

(245 to 70 SUS).

For further information about fluids see

catalog 920.

Where:

= Pressure at pilot port X

= Pressure at free flow outlet port B

= Pressure at free flow inlet port A

= Back pressure at drain port Y

C = Varies according to cracking

pressure, see table.

Temperature Limits

Minimum ambient: –20C (–4F)

Maximum ambient:

For PCGV valves: 70C (158F)

For PCG5V valves with coils listed in

model code and at 110% of rated

voltage:

Coil type and

frequency

Max. ambient

temperature

Dual frequency coils

at 50 Hz

at 60 Hz

65C (149F)

Single frequency coils

at 50 Hz

65C (149F)

DC coils 70C (158F)

Fluid temperatures (all models)

Petroleum

oil

Water-

containing

Min. –20C

(–4F)

+10 C

(+50F)

Max.* +70C

(+158F)

+54 C

(+129F)

* To obtain optimum service life from both

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

normally is the maximum temperature

except for water-containing fluids.

Model

type

“C” factor

bar

psi

PCG(5)V-6A

PCG(5)V-6C

PCG(5)V-6F

0,6

1,5

4,0

PCG(5)V-8A

PCG(5)V-8C

PCG(5)V-8F

0,6

1,5

3,0

For synthetic fluids consult fluid

manufacturer or Vickers

representative where limits are

outside those of petroleum oil.

Whatever the actual temperature

range, ensure that viscosities stay

within the limits specified in the

“Hydraulic Fluids” section.

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 (3050 psi) 20/18/15. . . . .

Above 210 bar (3050 psi) 20/18/15. . . .

Installation Dimensions in mm (inches)

PCGV Model

3rd angle

projection

For port functions see “Mounting Surfaces”, page 8

PCGV-**(D)-1 models only:

Alternative drain port G

(

 BSPF).

Remove plug to make connection.

Ø17 (0.67 dia)

Mounting surface

seals supplied

Ø11 (0.43 dia)

HPort A Port B

Model A B C D E F G H

PCGV-6*(D)-10

PCGV-6*(D)-1-10

PCGV-8*(D)-10

PCGV-8*(D)-1-10

38 (1.5)

66 (2.6)

38 (1.5)

66 (2.6)

82 (3.2)

98 (3.9)

24 (1.0)

23 (0.9)

12 (0.47)

13 (0.5)

55 (2.2)

74 (2.9)

62 (2.5)

78 (3.1)

89 (3.5)

103 (4.1)

10 (0.4)

11 (0.45)

PCG5V-6*(D)---20

PCG5V-6*(D)-1---20

PCG5V-8*(D)---20

PCG5V-8*(D)-1---20

–

82 (3.2)

98 (3.9)

–

12 (0.47)

13 (0.5)

55 (2.2)

74 (2.9)

62 (2.5)

78 (3.1)

89 (3.5)

103 (4.1)

10 (0.4)

11 (0.45)

Model J K L M N

PCGV-6*(D)-10

PCGV-6*(D)-1-10

PCGV-8*(D)-10

PCGV-8*(D)-1-10

–

33 (1.3)

–

35 (1.4)

56 (2.2)

60 (2.4)

68 (2.7)

72 (2.8)

–

PCG5V-6*(D)---20

PCG5V-6*(D)-1---20

PCG5V-8*(D)---20

PCG5V-8*(D)-1---20

–

56 (2.2)

60 (2.4)

68 (2.7)

72 (2.8)

165 (6.5)

168 (6.6)

86 (3.4)

114 (4.5)

86 (3.4)

114 (4.5)

With Type “F**” Coil Connection

(“F(T)J” or “F(T)W” at model code )

 The solenoid identification is printed on the nameplate of the pilot valve. Identification options

are described under “Model Code” .

For ANSI/NFPA method (no symbol at model code ) solenoid identity is: “Sol. A”.

For German method (“V” in model code ) solenoid identity is: “Sol. B”.

 Ref. model code :

Codes “FJ” and “FW”: 2 lead wires for each solenoid, approx.150,00 (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.

AC solenoid: 45,0 (1.8)

DC solenoid: 61,0 (2.4)

For coil removal:

With DC solenoid: 156 (6.14)

With AC solenoid: 146 (5.75)

For manual override type “H”:

15,0 (0.6)

For solenoid identification see 



M 

13,0 (0.5) for

plug removal

AC solenoid: 45,0 (1.8)

DC solenoid: 61,0 (2.4)

For coil removal:

With DC solenoid: 156 (6.14)

With AC solenoid: 146 (5.75)

For manual override type “H”:

15,0 (0.6)

For solenoid identification see 



Conduit entry both ends, see

“Model Code” . Closure plug

fitted to one end.

Ground (earth) connection:

Ø0,4 (0.16 dia) self-tapping

screw

 May vary according to plug source.

 Plug not supplied; order separately if

required. For available plug types see

section “Electrical Plugs and

Connectors”.

PCG5V Models

With Type “U” Coil Connection

(“U” at model code )

XCGVM-6-10R Subplate

 Tolerance on bolt and pin locations

"0,1 mm (0.004)

 See “Mounting Surfaces” section above

for port usage

C (min.)

D (min.)

F (min.)

Q (min.)

N (min.)

E

J

P

U (min.)

Ø M10 x 16,0 (0.63)

min. depth full thread

Ø 4,8 (0.19 dia)

Ø 7,5 (0.3 dia) x 6,0

(0.24) deep min.

Ø 4,8 (0.19 dia)

116,0 (4.5)

104,0 (4.1)

80,0 (3.15)

12,0 (0.5)

26,9 (1.06)

43,0 (1.7)

21,0 (0.83)

20,0 (0.8)

150,0

(6.0)

88,0

(3.5)

24,0 (0.95)

69,0

(2.7)

126,0

(5.0)

56,0

(2.2)

18,9 (0.75)

Port A 

Port B 

Tapped G1

(1 BSPF)

x 19,0 (0.75) depth

full thread in

underside

R28,0 (1.1 rad.)

Ø 7,5 (0.3 dia) x 6,0 (0.24)

deep, for valve

locating pin

4 holes, Ø 11,0 (0.43 dia)

through, Ø 17,5 (0.69 dia)

spotface

Port Y 

Port X 

Tapped G

(

 BSPF) x

12,0 (0.5) depth

full thread in

underside

4 holes tapped M10

x 16,0 (0.63) min.

depth full thread

Mounting Surfaces, Based on

ISO 5781, Codes:

AG-06-2-A

AH-08-2-A

When a subplate is not used a raised

machined pad must be provided for

mounting. The pad must be flat within

0,01mm/100 mm (0.001/10) and

smooth within 0,8 mm (32 min).

Dimensional tolerances are "0,2 mm

(0.008) except where indicated.

Port functions

A = Free flow inlet and controlled

reverse flow outlet

B = Free flow outlet and controlled

reverse flow inlet

X = Pilot control port

Y = External drain port

Size

A dia. B dia. C D E F H J K

06 14,7

(0.58)

14,7

(0.58)

61,0

(2.4)

9,0

(0.4)

42,9

(1.69)

9,0

(0.4)

35,7

(1.4)

31,8

(1.25)

21,4

(0.84)

08 23,4

(0.92)

23,4

(0.92)

78,0

(3.1)

8,8

(0.35)

60,3

(2.37)

8,8

(0.35)

49,2

(1.94)

44,5

(1.75)

39,7

(1.56)

Size L M N P Q R S T U

06 21,4

(0.84)

7,1

(0.28)

10,0

(0.4)

66,7

(2.62)

10,0

(0.4)

58,7

(2.3)

33,3

(1.3)

7,9

(0.31)

87,0

(3.4)

08 20,6

(0.81)

11,1

(0.44)

10,8

(0.43)

79,4

(3.125)

10,8

(0.43)

73,0

(2.87)

39,7

(1.56)

6,4

(0.25)

101,0

(4.0)

Installation Data

Mounting Attitude

Unrestricted.

Subplates

For PCG(5)V-6 valves see type

XCVGM-6-10R, on previous page.

For PCG(5)V-8 valves consult your

Vickers representative.

Mass (approx.)

Mounting Bolts/Torques

For PCG(5)V-6 valves:

bolt kit BKPCGV-6.

For PCG(5)V-8 valves:

bolt kit BKPCGV-8.

Bolts should be torqued to 59-73 Nm

(44-53 lbf ft), with threads lubricated.

PCG(5)V-6

kg (lb)

PCG(5)V-8

kg (lb)

PCGV with internal drain

PCGV with external drain

3,2 (7)

4,0 (8.8)

4,9 (10.8)

5,9 (13)

PCG5V with internal drain 

AC voltage models

DC voltage models

5,7 (12.6)

5,9 (13)

7,3 (16.1)

7,5 (16.5)

PCG5V with external drain 

AC voltage models

DC voltage models

6,5 (14.3)

6,7 (14.8)

8,3 (18.3)

8,5 (18.7)

 Pilot piston drain.

XCGVM-6-10R subplate: 3,0 kg (6.6 lb)

Electrical Plugs and

Connectors

Plugs for ISO 4400 (DIN 43650) Type

Coil Connection

For valves with type “U” coils (see model

code).

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 (0.24-0.40

dia).

Order plugs separately by part number.

Voltage

Part number

Gray

(Sol. A)

Black

(Sol. B)

Without indicator light

– 710776 710775

With indicator light

12-24V

100-125V

200-240V

977467

977469

977471

977466

977468

977470

For valves with type “F**” coils, see model code location

For “FTJ” or “FTW” at model code For “FTJL” or “FTWL” at model code +8 8 9

 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 Lights

Ordering Procedure

Valves, subplates and bolt kits should

be ordered by full model code

designation.