April 1996 GB-2334A
C2-8**, C5G(V)-8** and DT8P1
Typical Section
Model C5G(V)-8** shown with subplate
Basic Characteristics
Type Poppet valves. . . . . . . . . . . . . . . . .
Mounting:
C2-8** and DT8P1 Pipe thread. . . . . . . .
C5G(V)-8** Subplate. . . . . . . . . . . . . . . .
Maximum flow Up to 380 L/min. . . . . . . .
(100 USgpm)
Cracking pressure Up to 5,2 bar. . . . . . .
(75 psi)
Maximum pressure Up to 350 bar. . . . .
(5000 psi)
General Description
The directly operated, angled, gasket
mounted and inline check valves
described in this leaflet are used in
hydraulic systems where check valves,
which are closed by a limited spring
force, are required allowing oil flow in
one direction only.
Various cracking pressures are available
depending on the rating of the spring
used. All models, except the inline
check valves, can be used for a variety
of flow conditions including high velocity
flows resulting in shock conditions.
Inline models are intended for low shock
service.
An option on the C5G and C2 valves
allows for a hole to be drilled in the
poppet to provide a small return flow
when the valve is closed
Functional Symbols
(a) Check valve
Models C2-8**-(S3)
C2-8**-S8
C5G(V)-8**-(S3)
C5G(V)-8**-S8
DT8P1-**-**
(b) Check valve with bypass flow
restrictor
Models C2-8**-S12
C5G(V)-8**-S12
VICKERS
®
Check Valves
Model Codes
(F3-) C2 - *** (S**)
1 2
1
2
-
-UB
3 4
Special seals
For use with phosphate ester type fluids
Omit if not required
Design number
Subject to change
Nominal size
(Nominal bore pipe size)
800 =
1
/
4
I
805 =
3
/
8
I
815 =
3
/
4
I
820 = 1I
825 = 1
1
/
4
I
830 = 1
1
/
2
I
Cracking pressure
S3 = 3,5 bar (50 psi)
S8 = 5,2 bar (75 psi)
S12= 0,35 bar (5 psi), with threaded
plug in poppet for purchaser to
drill through to provide small flow
restriction in closed condition
Blank = 0,35 bar (5 psi)
3
4
DT8P1- **
3
- ** - ** -***
41 2
Nominal size
02 =
1
/
4
I
03 =
3
/
8
I
06 =
3
/
4
I
10 = 1
1
/
4
I
Cracking pressure
05 = 0,35 bar (5 psi)
30 = 2,1 bar (30 psi)
65 = 4,5 bar (65 psi)
Design number
10 for sizes 02 and 03
11 for sizes 06 and 10
Subject to change. Installation
dimensions remain unchanged for
design numbers 10-19 inclusive.
Port threads
For sizes 02 and 03 only:
UB = G (BSPF)
For sizes 06 and 10 only:
ENB = G (BSPF)
1
2
3
4
Special seals
For use with phosphate ester type fluids
Omit if not required
Check valve
Design number
Subject to change
Gasket mounting
Pressure rating
V = 350 bar (5000 psi),
C5GV-815/825 models
Omit for 250 bar (3600 psi), C5G-805
models
Nominal size
(nominal bore pipe size)
805 =
3
/
8
I
815 =
3
/
4
I
825 = 1
1
/
4
I
Cracking pressure
S3 = 3,5 bar (50 psi)
S8 = 5,2 bar (75 psi)
S12 = 0,35 bar (5 psi), with threaded
plug in poppet for purchaser to
drill through to provide small
flow restriction in closed
condition
Omit for 0,35 bar (5 psi)
Subplates
See “Installation Dimensions” section
Fixing Bolt Kits
See “Installation Data” section
1
2
3
4
(F3-)
C
- (S**)
1 2
-
5 7
5 G (V) 8**
3 4 6
5
6
7
Subplate Mounted Models,
C5G (V)-8** Series
Pipe-Mounted, In-Line Models,
DT8P1 Series
2
Pipe-Mounted, Angle Models,
C2-8** Series
Operating Data
3
Maximum Operating Pressure,
bar (psi)
C5G-805 valves 250 (3600). . . . . . . . . .
C5GV-815/825 valves 350 (5000). . . . .
All other valves 210 (3000). . . . . . . . . . .
E-C4GM-815 subplates 210 (3000). . .
E-C5GM-825 subplates 210 (3000). . .
Cracking Pressure, bar (psi)
C2-8** 0,35 (5). . . . . . . . . . . . . . . . . . . . .
C2-8**-S3 3,5 (50). . . . . . . . . . . . . . . . . .
C2-8**-S8 5,2 (75). . . . . . . . . . . . . . . . . .
C2-8**-S12 0,35 (5). . . . . . . . . . . . . . . . .
C5G(V)-8**(-S12) 0,35 (5). . . . . . . . . . . .
C5G(V)-8**-S3 3,5 (50). . . . . . . . . . . . . .
C5G(V)-8**-S8 5,2 (75). . . . . . . . . . . . . .
DT8P1-**-05 0,35 (5). . . . . . . . . . . . . . . .
DT8P1-**-30 2,1 (30). . . . . . . . . . . . . . . .
DT8P1-**-65 4,5 (65). . . . . . . . . . . . . . . .
Nominal Flow, L/min (USgpm)
C2-800-(S**) 12 (3). . . . . . . . . . . . . . . . . .
C2-805-(S**) 23 (6). . . . . . . . . . . . . . . . . .
C2-815-(S**) 60 (16). . . . . . . . . . . . . . . . .
C2-820-(S**) 105 (28). . . . . . . . . . . . . . . .
C2-825-(S**) 170 (45). . . . . . . . . . . . . . . .
C2-830-(S**) 245 (65). . . . . . . . . . . . . . . .
C5G-805-(S**) 38 (10). . . . . . . . . . . . . . .
C5GV-815-(S**) 76 (20). . . . . . . . . . . . . .
C5GV-825-(S**) 380 (100). . . . . . . . . . .
DT8P1-02-** 12 (3). . . . . . . . . . . . . . . . . .
DT8P1-03-** 30 (8). . . . . . . . . . . . . . . . . .
DT8P1-06-** 76 (20). . . . . . . . . . . . . . . . .
DT8P1-10-** 190 (50). . . . . . . . . . . . . . . .
Hydraulic Fluids
The C2 and C5G(V) models can be
used with hydraulic oils, water-in-oil
emulsions and water glycols. Add prefix
“F3” to model designation when
phosphate ester (not alkyl-based) are to
be used.
DT8P1 models can be used with all
of the above mentioned fluids.
The extreme operating viscosity range is
from 13 to 860 cSt (70 to 4000 SUS) but
the recommended 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) 20/18/15. . . . .
Above 210 bar (3000 psi) 20/18/15. . . .
Temperature Limits
Ambient
Min. –20_ C (–4_F). . . . . . . . . . . . . . . . . .
Max. +70_C (+158_F). . . . . . . . . . . . . . . .
Fluid Temperature
Petroleum
oil
Water-
containing
Min.
Max.*
–20_ C
(–4_F)
+80_C
(+176_F)
+10_C
(50_F)
+54_C
(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 those for petroleum oil.
Whatever the actual temperature range,
ensure that viscosities stay within the
limits specified in the “Hydraulic Fluids”
section.
11020304050100 200 300 500
1
0
2
3
bar
0
10
20
30
40
psi
L/min
C5GV-815
C5GV-825
C5G-805
Flow rate
Pressure drop
11020304050100 200 300 500
1
0
3
bar
0
psi
10010 5020
130
0
L/min
USgpm
DT8P1-02
Flow rate
Pressure drop
2
4
5
6
7
8
9
100
50
75
25
125
DT8P1-03
DT8P1-06
DT8P1-10
11020304050100 200 300 500
1
0
2
bar
0
10
20
30
psi
L/min
C2-805
Flow rate
Pressure drop
C2-800
C2-815
C2-830
C2-825
C2-820
Models DT8P1
Models C2-8**
10010 5020
130
0 USgpm
10010 5020
130
0 USgpm
Models C5G(V)-8**
4
Pressure Drop
Installation Dimensions in mm (inches)
D
M
L
G
J
K
C
F
E
H
B
U
A
ØT
ØS
Not fitted to
C5G-805
Fitted to
C5G-805 only
Outlet port ØQ
Inlet port ØP
ØN
3rd angle
projection
R
6,4
(0.25)
Ø6,35
(0.25 dia)
D
N
M
L
G
J
K
C
H
T
S
F
E
Thread A
Thread B
ØP
ØQ
2 holes 7,1 (0.28) to
7,8 (0.31) deep
Ø13,5
(0.53 dia)
Ø19,8
(0.78 dia)
12,7 (0.5)
R
R
5
Model C5G(V)-8**
Note: For C5G-805 models, users must
provide a machined pad (bound by
dimensions “A” and “B”) for mounting.
Surface flatness within 0,01 mm per
100 mm (0.0001I per 1I) and smooth
within 0,8 mm (32 min).
Model A B C D E F G H J K L M N P Q R S T U
C5G-805
C5GV-815
C5GV-825
65
(2.56)
97
(3.82)
127
(5.0)
77,7
(3.06)
113
(4.45)
127
(5.0)
66
(2.6)
76
(2.99)
110
(4.33)
38,9
(1.53)
56,4
(2.22)
63,5
(2.5)
60,5
(2.38)
81
(3.19)
92
(3.62)
47,8
(1.88)
65
(2.56)
92
(3.62)
35,1
(1.38)
46
(1.81)
50,8
(2.0)
12,7
(0.5)
12,7
(0.5)
20,6
(0.81)
–
–
8,7
(0.34)
9,5
(0.37)
33,3
(1.31)
38
(1.5)
58
(2.28)
29,5
(1.16)
27
(1.06)
42
(1.65)
–
–
41,1
(1.62)
47,7
(1.87)
33,3
(1.31)
51
(2.0)
66,5
(2.62)
14,7
(0.58)
19,0
(0.75)
28,6
(1.13)
14,7
(0.58)
22,2
(0.87)
35,0
(1.38)
8,6
(0.34)
16
(0.63)
17,5
(0.69)
10,7
(0.42)
16,7
(0.66)
20,8
(0.82)
–
–
25,4
(1.0)
30,1
(1.18)
–
–
16
(0.63)
–
–
Subplate (Max. op. pressure 210 bar
(3000 psi))
(Not available for C5G-805 valves)
For pressures above 210 bar (3000 psi)
or when the tabled subplates are not
required, a machined pad (bound by the
shaded area) must be provided for
mounting.
Surface flatness within 0,01 mm per
100 mm (0.0001I per 1I) and smooth
within 0,8 mm (32 min).
Subplate Thread A Thread B C D E F G H J K
E-C4GM-815-R
E-C4GM-815-B
M16-6H
5
/
8
I - 11 UNC-2B
G
3
/
4
I
(BSPF)
97
(3.82)
172
(6.77)
28,4
(1.12)
25,4
(1.0)
139,7
(5.5)
65,0
(2.26)
81,0
(3.12)
40,5
(1.59)
E-C5GM-825-R
E-C5GM-825-B
M20-6H
3
/
4
I - 10 UNC-2B
G 1
1
/
4
I
(BSPF)
127
(5.0)
187
(7.36)
47,6
(1.87)
22,2
(0.87)
152,4
(6.0)
92,0
(3.62)
92,0
(3.62)
46,0
(1.81)
Subplate L M N P Q R S T
E-C4GM-815-R
E-C4GM-815-B
8,7 (0.34) 22,2 (0.87) 68,3 (2.69) 22,2 (0.87) 22,2 (0.87) 16 (0.63) 50,6 (1.99) 98,7 (3.89)
E-C5GM-825-R
E-C5GM-825-B
9,5 (0.37) 20,6 (0.81) 71,4 (2.81) 28,6 (1.13) 35,0 (1.38) 17,56 (0.69) 21,2 (0.83) 69,3 (2.72)
A
Inlet Outlet
B
C
D
C
E
F
A
B
Inlet Outlet
6
Model C2-8**
Model A B C D E F Port threads
(BSPF)
C2-800
C2-805
C2-815
C2-820
C2-825
C2-830
75 (2.95)
75 (2.95)
98 (3.86)
116 (4.57)
138 (5.43)
138 (5.43)
26 (1.02)
26 (1.02)
44,5 (1.75)
47 (1.85)
67 (2.64)
67 (2.64)
32 (1.26)
32 (1.26)
61 (2.4)
57 (2.24)
76 (2.99)
76 (2.99)
54 (2.13)
54 (2.13)
70 (2.76)
83 (3.27)
83 (3.27)
83 (3.27)
32 (1.26)
32 (1.26)
46 (1.81)
57 (2.24)
67 (2.64)
67 (2.64)
58 (2.28)
58 (2.28)
81 (3.19)
98 (3.86)
108 (4.25)
108 (4.25)
G
1
/
4
I
G
3
/
8
I
G
3
/
4
I
G 1I
G 1
1
/
4
I
G 1
1
/
2
I
Model DT8P1
CAUTION: DT8P1 models are designed
for low-shock closure service; for
high-shock closure use the equivalent
size of C2-8** model shown above.
Model A B Port threads
(BSPF)
DT8P1-02
DT8P1-03
DT8P1-06
DT8P1-10
57,2 (2.25)
76,2 (3.0)
98,4 (3.87)
133,4 (5.25)
22,2 (0.87)
25,4 (1.0)
38,1 (1.5)
63,5 (2.5)
G
1
/
4
I
G
3
/
8
I
G
3
/
4
I
G1
1
/
4
I
7
Mass, kg (lb)
C2-800 1,4 (3.1). . . . . . . . . . . . . . . . . . . . .
C2-805 1,4 (3.1). . . . . . . . . . . . . . . . . . . . .
C2-815 2,3 (5.1). . . . . . . . . . . . . . . . . . . . .
C2-820 3,7 (8.1). . . . . . . . . . . . . . . . . . . . .
C2-825 4,8 (10.6). . . . . . . . . . . . . . . . . . . .
C2-830 4,8 (10.6). . . . . . . . . . . . . . . . . . . .
C5G-805 1,3 (2.9). . . . . . . . . . . . . . . . . . .
C5GV-815 3,0 (6.6). . . . . . . . . . . . . . . . . .
C5GV-825 6,2 (13.6). . . . . . . . . . . . . . . . .
DT8P1-02 0,2 (0.5). . . . . . . . . . . . . . . . . .
DT8P1-03 0,3 (0.7). . . . . . . . . . . . . . . . . .
DT8P1-06 0,7 (1.6). . . . . . . . . . . . . . . . . .
DT8P1-10 2,8 (6.2). . . . . . . . . . . . . . . . . .
Installation Data
Mounting attitude optional.
Valve Fixing Bolts
Recommended bolt kit options are listed
below. If bolts are to be provided by the
user they must be to Class 12,9
(ISO 898) or equivalent.
Valve
Subplate Bolt kit
C5G-805
C5GV-815
C5GV-825
–
E-C4GM-815-R
E-C4GM-815-B
E-C5GM-825-R
E-C5GM-825-B
BKCG-805-619Y
EBKCG-815-612M
BKCG-815-612
EBKCG-825-616M
BKCG-825-616
Y
3
/
8
I-16 UNC
Ordering Procedure
Subplates and bolt kits are supplied as
separate units and therefore must be
ordered as such.
