4CG 4CS/T
4CG1/2 4CT1
Pilot
Pilot
Pilot
Pilot
April 1996 GB-2340A
4CG-10, 20 Series
4CS-03, 20 Series
4CT-06/10, 20 Series
Typical Section
4CT1-06-D*-20-UB, illustrating external
drain and decompression features
General Description
These pilot operated check valves
operate as standard check (non-return)
valves in one direction, but can also be
opened by a remote pilot pressure
signal to permit reverse flow.
An optional decompression feature
(used in conjunction with appropriate
pilot pressures) provides for the
controlled decompression of large
volumes of pressure fluid before the
valve opens to allow full flow.
See catalog 2329 for other subplate-
mounted pilot operated check valves for
pressures up to 350 bar (5000 psi) and
flow rates up to 300 L/min (80 USgpm)
and with integrally mounted solenoid
operated pilot valves.
Functional Symbols
Basic Characteristics
Maximum
pressure Up to 210 bar (3000 psi). . . . .
Nominal flow rate Up to 280 L/min. . . . .
(74 USgpm)
Mounting:
4CG-10 models Subplate/manifold. . . .
4CS-03 models
3
/
4
I-16 UNF, SAE. . . .
4CT-06 models G
3
/
4
(
3
/
4
I BSPF). . . . . .
4CT-10 models G1
1
/
4
(1
1
/
4
I BSPF). . . .
Pilot Operated Check Valves
Vickers
®
Check Valves
Model Codes
(F3-)4CG -10-(D)
1 4 5 6
1
2
3
Fluid compatibility
Blank = Antiwear hydraulic oil
(class L-HM), invert emulsion
(L-HFB) or water glycol (class
L-HFC)
F3 = As above or phosphate ester
(class L-HFD)
Pilot piston external drain option
(Not available on 4CS-03 models)
1 = Drain through lower cover
For 4CG*-10 model only:
2 = Drain through interface port
Nominal size
For 4CT models only:
06 =
3
/
4
I nominal bore pipe size
10 = 1
1
/
4
I nominal bore pipe size
Decompression feature
Omit “D” if not required
Cracking (opening) pressure
A = 2 bar (30 psi)
B = 3,4 bar (50 psi) (except 4C*-10)
C = 5 bar (75 psi)
F = 10 bar (150 psi)
4
5
6
*2*-(*)
2
-UG
(F3-)4CS-03- (D)
1 4 5 6
*2*-
(F3-)4CT -**- (D)
1 4 5 6
*2*-(1)
2
-UB
3
Design number, 2* series
Subject to change. Installation
dimensions unaltered for design
numbers 21-29.
2
Features in brackets ( ) may be omitted.
All other features must be specified.
For Subplate-Mounted Model
For Thread-Mounted Models
Size 03:
Sizes 06 and 10:
Operating Data
For internally drained pilot piston
models, no symbol at model code :
2
Pilot pressure +
P
out
– P
in
Area ratio
) P
in
) C
For externally drained pilot piston
models, “1” (or “2” for 4CG) at model
code :
Pilot pressure +
P
out
Area ratio
) C
2
Where:
P
in
= Pressure (bar) at free flow inlet
P
out
= Pressure (bar) at free flow outlet
C = Varies according to model/
cracking pressure, see table.
3
Maximum pressures
All ports, all models 210 bar (3000 psi)
Nominal flow rates:
4CS-03
4CT-06
4CT-10, 4CG-10
45 L/min (12 USgpm) at ∆p 1,7 bar (25 psi)
114 L/min (30 USgpm) at ∆p 2,8 bar (40 psi)
284 L/min (75 USgpm) at ∆p 3,4 bar (50 psi)
Cracking (opening pressure)
See “Model Code”
5
Pilot pressures See “Pilot Pressures” below
Area ratios
Pilot piston to check valve:
4CS-03, 4CT-06
4CT-10, 4CG-10
Pilot piston to decompression
poppet:
4CS-03
4CT-06
4CT-10, 4CG-10
3,5:1
2,6:1
33,8:1
52,6:1
77,0:1
Hydraulic fluids See “Model Code” and “Hydraulic Fluids”
1
Temperatures
Ambient:
Min.
Max.
Fluid temperatures
–20_C (–4_F)
+70_ C (158_F)
See “Fluid Temperatures”
For 4CG model only:
Subplate
Mounting bolts
E-RXGM-10(X), see page 6
See “Installation Data”
Mass (weight):
4CS-03
4CT-06
4CT-10
4CG-10
2,8 kg (6.2 lb)
5,7 kg (12.5 lb)
12,1 kg (26.7 lb)
11,9 kg (26.2 lb)
Pilot Pressures
The pilot pressure required to open the
check valve or decompression poppet is
stated as a ratio of the pressure on the
check to the pilot pressure. To
determine the required pilot pressure the
following formulae should be used.
Model
“C” factor for cracking
pressure, model code
5
ABCF
4CS-03
4CT-06
4CT-10
4CG-10
0,6
0,6
0,8
0,8
1,0
1,0
2,0
2,0
1,5
1,5
–
–
4,0
3,0
4,0
4,0
Hydraulic Fluids
All valves can be used with the fluids
specified in “Model Code” . Prefix
“F3-” must be specified to obtain seals
suitable for operation with phosphate
esters (not alkyl based).
The extreme operating viscosity range
is from 13 to 860 cSt (70 to 4000 SUS),
but the recommended running range is
13 to 54 cSt (70 to 245 SUS).
For further information about fluids see
leaflet 920.
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) 19/17/14
Fluid Temperature
Petroleum Water-
oil containing
Min. –20_C +10_C
(–4_F) (50_F)
Max.* +80_ C +54_C
(+176_F) (130_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.
For synthetic fluids consult
manufacturer or Vickers representative
where limits are outside of those for
petroleum oil. Whatever the actual
temperature range, ensure that
viscosities stay within the limits
specified under “Hydraulic Fluids”.
1
Installation Dimensions in mm (inches)
4
4CS-03 and 4CT(1)-06/10 Pipe-Mounted Models
Free flow inlet, or reverse
controlled flow outlet (Gage
port 2). Optional ports.
Thread K.
Gage port 1
Free flow outlet, or reverse
controlled flow inlet (Gage
port 1). Thread K.
Pressure gage ports,
all models:
7
/16I-20 UNF-2B, SAE
O-ring ports
Gage port 2
M
L
Pilot pressure connection:
4CS-03
:
9
/16I-18 UNF-2B,
SAE O-ring port
All others: G
1
/
4
For 4CT1-06/10 models only:
External drain connection
G
1
/
8
A
G
J
C
E
E
D
B
F
H
3rd angle
projection
Model A B C D E F G H J K L M
4CS-03
4CT(1)-06
4CT-10
4CT1-10
122
(4.8)
178
(7.0)
194
(7.6)
204
(8.03)
70
(2.76)
93
(3.66)
118
(4.64)
118
(4.64)
70
(2.76)
89
(3.5)
118
(4.64)
118
(4.64)
35
(1.38)
50,8
(2.0)
86,4
(3.4)
86,4
(3.4)
60
(2.36)
75
(2.95)
99
(3.9)
99
(3.9)
40
(1.57)
50,8
(2.0)
68,3
(2.69)
68,3
(2.69)
53
(2.09)
78
(3.07)
84
(3.31)
94
(3.7)
57
(2.24)
70
(2.76)
95
(3.74)
95
(3.74)
23,1
(0.91)
26,9
(1.06)
28,9
(1.14)
28,9
(1.14)
3
/
4
I-16 UNF-2B
G
3
/
4
(BSPF)
G1
1
/
4
(BSPF)
G1
1
/
4
(BSPF)
45,2
(1.78)
57,2
(2.25)
70,6
(2.78)
82
(3.23)
–
–
42,7
(1.68)
–
–
54,6
(2.15)
5
4CG(*)-10, Subplate-Mounted
Models
J When using 4CG-10 or 4CG1-10 models,
plug this connection at the subplate or at
the mounting face (e.g. do not drill
matching hole in subplate/ manifold block).
6 holes Ø10,8 (0.425 dia) thru,
counterbored Ø17,0 (0.67 dia) to
dimension F for mounting bolts.
Gage port 1, G
1
/
4
Gage port 2, G
1
/
4
J
Pilot pressure
connnection
Free flow outlet or
reverse controlled flow
inlet (Gage port 1)
Mounting surface
(seals supplied)
Free flow inlet or
reverse controlled
flow outlet (Gage
port 2)
A
B
C
D
E
F
G
For 4CG1 models
only: External drain
G
1
/
8
Location
pin
3rd angle
projection
Model
A B C D E F G
4CG-10
4CG*-10
194 (7.64)
204 (8.03)
118 (4.65)
118 (4.65)
100 (3.93)
100 (3.93)
55 (2.17)
65 (2.56)
48,4 (1.91)
48,4 (1.91)
95,3 (3.75)
95,3 (3.75)
–
26 (1.0)
Y Pin at location (1) for pilot operated
check valves; at location (2) for pressure
reducing valves.
92,86
(3.65)
21,49
(0.85)
48,4
(1.91)
3,97
(0.16)
20,6
(0.81)
11,2
(0.44)
96,83
(3.81)
138,1
(5.43)
161,0
(6.34)
C
62,71
(2.47)
B
84,1
(3.31)
95,4
(3.76)
147,0
(5.79)
16,9
(0.67)
24,6
(0.97)
42,1
(1.66)
59,5
(2.34)
67,5
(2.66)
Ø10,8
(0.425 dia)
Ø17,0
(0.67 dia)
12,0
(0.47)
47,75
(1.88)
22,4
(0.88)
2 holes tapped A
2 holes Ø7,1 (0.28 dia)
x 7,9 (0.31) deep for
location pins Y
External pilot pressure connection:
Ø4,8 (0.19 dia) at mounting face;
G
1
/
4
on rear face
For external drain connection for
4CG2 models only:
Ø4,8 (0.19 dia) at mounting face;
G
1
/
4
on rear face
When used for 4CG or 4CG1
models this connection must be
plugged.
Main ports on rear face;
2 holes Ø28,6 (1.125 dia) at mounting face
6 holes tapped M10 x 24,0 (0.94) deep
at mounting face
OUT
IN
119,3
(4.7)
11,2 (0.44)
31,4
(1.24)
(1)
(2)
When a subplate is not used, a
machined pad (as indicated by shaded
area) must be provided for mounting.
The pad must be flat within 0,013 mm
(0.0005 in) and smooth within 1,6 mm
(63 microinch). Mounting bolts provided
by the customer should be Class 12,9
(ISO 898) or better.
6
E-RXGM-10(X) Subplate
For 4CG (*)-10 Models
Model A B C
E-RXGM-10-20R
E-RXGM-10X-20R
G1
1
/
4
(1
1
/
4
I BSPF)
G1
1
/
2
(1
1
/
2
I BSPF)
76,2 (3.0)
78,1 (3.1)
7,9 (0.31)
6,0 (0.24)
Installation Data
Mounting Attitude
No restrictions
Mounting Bolts
Bolt kit BKRX-10-662M. . . . . . . . . . . . . .
If not using Vickers recommended bolt
kit, bolts used should be to ISO 898
class 12,9 or better.
Recommended
bolt torque 49-59 Nm (36-44 lbf ft). . . . .
Ordering Procedure
Specify full model code.
