■ Pilot Operated Check Valves
These check valves allow flow in one direction and prevent flow in the reverse direction, until operated by pilot pressure
to allow free reverse flow. The specified cracking pressure is required to open the valve to allow free flow direction.
Graphic Symbols
Internal Drain Type
External Drain Type
Specifications
Type of Connection
Rated Flow
L /min (U.S.GPM)
Model Numbers
Threaded Connection
Sub-plate Mounting
CPT/CPDT-03- - -50
40 (10.6)
CPT/CPDT-06- - -50
125 (33)
CPT/CPDT-10- - -50
250 (66)
CPG/CPDG-03- - -50
40 (10.6)
CPG/CPDG-06- - -50
125 (33)
CPG/CPDG-10- - -50
250 (66)
Max. Operating Pres.
MPa (PSI)
Cracking Pres.
MPa (PSI)
25 (3630)
25 (3630)
Approx. Mass
kg (lbs.)
0.04
0.2
0.35
0.5
(6)
(29)
(50)
(70)
3.0 (6.6)
0.04
0.2
0.35
0.5
(6)
(29)
(50)
(70)
3.3 (7.3)
5.5 (12.1)
9.6 (21.2)
5.4 (11.9)
8.5 (18.7)
Rated flow is the approximate flow rate, when there is a free flow pressure drop of maximum 0.3 MPa (44 PSI), the fluid has a specific
gravity of 0.85 and a kinematic viscosity of 20 m m2 /s (98 SSU), and the cracking pressure is 0.04 MPa (6 PSI).
Model Number Designatioin
F-
CP
T
03
-E
-04
-50
Special
Seals
Series
Number
Type of
Connection
Valve
Size
Drain
Connection
Cracking Pres.
MPa (PSI)
Design
Number
Design
Standards
F:
Special Seals
for Phosphate
Ester Type
Fluids
(Omit if not
required)
CP:
Pilot Operated
Check Valve
CPD:
Decompression
Type Pilot
Operated
Check Valve
T:
Threaded
Connection
03
None:
Internal
Drain
50
04: 0.04 (6)
50
20: 0.2 (29)
50
None: Japanese Std. "JIS"
80: European Design Std.
90: N. American Design Std.
G:
Sub-plate
Mounting
03
35: 0.35 (50)
50
50: 0.5 (70)
50
06
10
06
10
E:
External
Drain
Mounting Bolts
Socket head cap screws in the table below are included.
Valve
Model
Numbers
N.American
Design Standard
Qty.
CP G-03
M10
45 Lg.
3/8-16 UNC
1-3/4 Lg.
4
CP G-06
M10
50 Lg.
3/8-16 UNC
2 Lg.
4
CP F-10- - -50
250 (66)
Max. Operating
Pressure
MPa (PSI)
25 (3630)
6
CP F-16- - -50
600 (159)
25 (3630)
CP G-10
504
Yuken can offer flanged connection valves
described below.
For details, contact us.
Socket Head Cap Screw
Japanese Standard "JIS" &
European Design Standard
50
None: Japanese Std. "JIS" &
European Design Std.
90: N. American Design Std.
M10
55 Lg.
3/8-16 UNC
2-1/4 Lg.
Model Numbers
Pilot Operated Check Valves
Rated Flow
L /min (U.S.GPM)
DIRECTIONAL CONTROLS
Sub-plate
Valve
Model
Numbers
CP G-03
CP G-06
CP G-10
Japanese Standard "JIS"
European Design Standard
Thread
Size
Approx.
Mass
kg (lbs.)
3/8 BSP.F
HGM-03-2090
3/8 NPT
1.6 (3.5)
1/2 BSP.F
HGM-03X-2090
1/2 NPT
1.6 (3.5)
3/4 BSP.F
HGM-06-2090
3/4 NPT
2.4 (5.3)
Thread
Size
Sub-plate
Model Numbers
Thread
Size
HGM-03-20
Rc 3/8
HGM-03-2080
HGM-03X-20
Rc1/2
HGM-03X-2080
HGM-06-20
Rc 3/4
HGM-06-2080
HGM-06X-20
HGM-06X-2080
N. American Design Standard
Sub-plate
Model Numbers
Sub-plate
Model Numbers
HGM-06X-2090
1 NPT
3.0 (6.6)
HGM-10-20
Rc 1-1/4
HGM-10-2080
1-1/4 BSP.F
HGM-10-2090
1-1/4 NPT
4.8 (10.6)
HGM-10X-20
Rc 1-1/2
HGM-10X-2080
1-1/2 BSP.F
HGM-10X-2090
1-1/2 NPT
5.7 (12.6)
Rc 1
1 BSP.F
Sub-plates are available, specify the sub-plate model number from the table above. When sub-plates are not used, the mountingsurface should
have a good machined finish.
Sub-plates are shared with those for H Type Pressure Control Valves. Refer to pages 244 to 246 for dimensions.
E
Operation of internal and external drain types
When the outlet side P1 is directly connected to the tank in reversed
free flow (Fig. a), the internal drain type is normally used. When
the back pressure is applied to the outlet side P1 (Fig. b), be sure
to use the external drain type.
P2
DR
Minimum pilot pressure characteristics
That depends on the pressure of the inlet side P2 in the reversed
free flow.
This value can be determined from the characteristics chart.
Cautionson replacementof 20 design low crackingpressure
t y p e v a lv e s w it h 5 0 d e s ig n v a lv e s .
In 20 design valve with cracking pressure of 0.035 MPa (5 PSI)
(Code "5"), for closing the valve completely and certainly, it was
necessar y to introduc e the pressurize d oil into the drain port to
push down the piston compulsory.
While in 50 design valve with cracking pressure of 0.04 MPa (6
PSI) (Code "6"), it has such structure that the valve can be closed
completely and certainly without introducing the pressurized oil
into the drain port. On the contrary , what is worse is that if the
pressurized oil is introduced into the drain port, the oil acts towards
the direction o f opening the valve, which i s very dangerous and
has to be absolutely avoided. Therefore, please do not supply any
pressurized oil into the drain port in case of using 50 design valve.
P2
P1
P1
(Fig.a)
(Fig.b)
Pilot Operated Check Valves
Instructions
WARNING
The machinery, if misused due to failure to observe
the "Cautions" on the left, may perform
unforeseeable movements, resulting in a disastrous
accident.
Pilot Operated Check Valves
505
CPT/CPDT-03- - -50/5080/5090
CPT/CPDT-06- - -50/5080/5090
CPT/CPDT-10- - -50/5080/5090
H
E
Free Flow Inlet or Reversed
Controlled Flow Outlet Port
"N" Thd.
K
L
D
FREE
F
J
Drain Port
"P" Thd.
C
Free Flow Outlet or
Reversed Controlled
Flow Inlet Port "N" Thd.
B
A
Model Numbers
CPT/CPDT-03- - -50
CPT/CPDT-03- - -5080
CPT/CPDT-03- - -5090
CPT/CPDT-06- - -50
CPT/CPDT-06- - -5080
CPT/CPDT-06- - -5090
Dimensions
A
B
C
D
E
Pilot Port
"P" Thd.
mm (Inches)
F
H
Thread Size
J
K
L
"N" Thd.
38
80
40
39
150.5 84.5
60
29
67.5 26.5
(1.50)
(3.15) (1.57) (1.54) (5.93) (3.33)
(2.36) (1.14) (2.66) (1.04)
Dia.
Rc 1/4
3/8 BSP.F
1/4 BSP.F
3/8 NPT
1/4 NPT
62
96
48
47
171.5 92.5
72
35
75.5
31
(2.44)
(3.78) (1.89) (1.85) (6.75) (3.64)
(2.83) (1.38) (2.97) (1.22)
SQ.
Rc 3/4
Rc 1/4
3/4 BSP.F
1/4 BSP.F
3/4 NPT
1/4 NPT
Rc 1-1/4
Rc 1/4
CPT/CPDT-10- - -50
80
140
70
64
203.5 113
82
40
96
43
(3.15)
1-1/4 BSP.F
CPT/CPDT-10- - -5080
(5.51) (2.76) (2.52) (8.01) (4.45)
(3.23) (1.57) (3.78) (1.69)
SQ.
1-1/4 NPT
CPT/CPDT-10- - -5090
506
"P" Thd.
Rc 3/8
Pilot Operated Check Valves
1/4 BSP.F
1/4NPT
DIRECTIONAL CONTROLS
CPG/CPDG-03- - -50/5090
CPG/CPDG-06- - -50/5090
A
B
C
J
Locating Pin
6(.24) Dia.
FREE
Mounting Surface
(O-Rings Furnished)
Pilot Port
F
Drain Port
11(.43) Dia. Through
17.5(.69) Dia. Spotface
4 Places
Free Flow Inlet or
Reversed Controlled
Flow Outlet Port
Dimensions
Model Numbers
mm (Inches)
Mounting Surface
A
B
C
D
E
F
H
J
CPG/CPDG-03- - -50/5090
90
(3.54)
66.7
(2.63)
11.7
(.46)
150.5
(5.93)
42.9
(1.69)
66
(2.60)
62
(2.44)
30
(1.18)
ISO 5781-AG-06-2-A
CPG/CPDG-06- - -50/5090
102
(4.02)
79.4
(3.13)
11.3
(.44)
171.5
(6.75)
60.3
(2.37)
67.5
(2.66)
74
(2.91)
35
(1.38)
ISO 5781-AH-08-2-A
Mounting surface: ISO 5781-AJ-10-2-A
CPG/CPDG-10- - -50/5090
DIMENSIONS IN
MILLIMETRES (INCHES)
Free Flow Outlet or Reversed
Controlled Flow Inlet Port
11.1
(.44)
E
119
(4.69)
96.8
(3.81)
Pilot Operated Check Valves
D
E
Free Flow Outlet or Reversed
Controlled Flow Inlet Port
6
(.24)
H
6
(.24)
89
(3.50)
40
(1.57)
FREE
Locating Pin
6(.24) Dia.
Mounting Surface
(O-Rings Furnished)
70
(2.76)
203.5
(8.01)
84.1
(3.31)
42.1
(1.66)
Drain Port
11(.43) Dia. Through
17.5(.69) Dia. Spotface
6 Places
Pilot Port
Free Flow Inlet or
Reversed Controlled
Flow Outlet Port
Pilot Operated Check Valves
507
Hydraulic Fluid: Viscosity 30 mm2/s (141 SSU), Specific Gravity 0.850
Pressure Drop
CPG-03, CPDG-03
PSI
PSI MPa
175
1.2
150
CP T-03- -50
CP T-03- -35
Pressure Drop 6P
Pressure Drop 6P
CPT-03, CPDT-03
CP T-03- -20
0.8
100
CP T-03- -04
0.4
50
Reversed
Controlled Flow
0
0
0
10
20
0
30
40
5
60
50
10
140
MPa
1.0
120
0.8
100
80
CP G-03- -20
60
0.4
CP G-03- -04
40
20
Reversed
Controlled Flow
0
0
L/min
15
CP G-03- -50
CP G-03- -35
0
U.S.GPM
10
20
0
30
5
PSI
200
CP T-06- -50
CP T-06- -20
150
0.8
100
50
0.4
0
0
CP T-06- -04
0
25
0
50
100
75
125
20
30
Flow Rate
10
150
Reversed
Controlled Flow
175 200 L/min
40
50
CP T-10- -20
CP T-10- -04
0.9
100
0.6
50
0.3
0
0
0
50
0
100
200
150
250
300
40
60
Flow Rate
20
50
0.4
0
0
CP G-06- -04
0
25
50
100
75
Reversed
Controlled Flow
150 175 200 L/min
125
20
30
Flow Rate
10
PSI MPa
300
2.0
CP T-10- -35
1.2
150
CP G-06- -20
0.8
100
40
50 U.S.GPM
CPG-10, CPDG-10
CP T-10- -50
1.5
200
CP G-06- -50
0
Pressure Drop 6P
Pressure Drop 6P
250
MPa
1.8
U.S.GPM
CP G-06- -35
150
U.S.GPM
CPT-10, CPDT-10
PSI
MPa
1.4
1.2
CP T-06- -35
1.2
15
L/min
CPG-06, CPDG-06
Pressure Drop 6P
Pressure Drop 6P
225
200
60
Flow Rate
CPT-06, CPDT-06
MPa
1.6
50
10
Flow Rate
PSI
40
Reversed
Controlled Flow
350 400 L/min
80
100
250
CP G-10- -35
200
1.2
CP G-10- -20
150
100
50
0
CP G-10- -04
CP G-10- -50
1.6
0.8
0.4
Reversed
Controlled Flow
0
0
U.S.GPM
0
50
100
150 200
20
40
250 300 350
80
60
Flow Rate
400 L/min
100 U.S.GPM
Min. Pilot Pressure Chart
PSI
MPa
12
1700
Minimum Pilot Pressure (PP)
1600
10
1400
P2
1200
P2
P1
P1
PP
PP
Cracking Pressure
0.5 MPa (70 PSI)
0.04 MPa (6 PSI)
8
1000
6
800
P2
600
4
P1
Cracking Pressure
0.5 MPa (70 PSI)
0.04 MPa (6 PSI)
400
2
PP
A
200
A : Min. Pilot Pressure to open the Decompression Valve
0
0
0
10
5
0
500
1000
15
1500
20
2000
2500
3000
25
MPa
3500
PSI
Supply Pressure (P2)
Pressure Drop for Reversed Controlled Flow Only when Decompression Valve is Opened
CPDT-06, CPDG-06
2000
15
10
1000
0
5
0
0
0
508
5
1
10
15
2
3
Flow Rate
4
20
5
PSI MPa
3500 25
3000 20
2000
PSI MPa
3500 25
3000 20
15
2000
10
1000
25 L/min
6
CPDT-10, CPDG-10
Pressure Drop 6P
PSI MPa
3500 25
3000 20
Pressure Drop 6P
Pressure Drop 6P
CPDT-03, CPDG-03
U.S.GPM
0
1000
5
0
0
0
10
2
20
4
6
30
40
8
10
Flow Rate
50
12
14
Pilot Operated Check Valves
60 L/min
15
10
0
16 U.S.GPM
5
0
0
0
50
10
100
20
30
Flow Rate
150
200 L/min
40
50 U.S.GPM
DIRECTIONAL CONTROLS
■ List of Seals
CPT/CPDT-03- - -50/5080/5090
CPT/CPDT-06- - -50/5080/5090
CPT/CPDT-10- - -50/5080/5090
5
12
19
1
10
4
20
16
3
21
2
18
7
17
8
11
13
15
CPDT-03/06/10
E
9
List of Seals
Item
Name of Parts
11
12
13
Part Numbers
Qty.
CPT/CPDT-03
CPT/CPDT-06
CPT/CPDT-10
O-Ring
SO-NB-P7
SO-NB-P9
SO-NB-P9
1
O-Ring
SO-NB-P21
SO-NB-P29
SO-NB-P36
1
O-Ring
SO-NB-G25
SO-NB-P32
SO-NB-P42
1
Note: When ordering the seals, please specify the seal kit number from the table below.
CPG/CPDG-03- - -50/5090
CPG/CPDG-06- - -50/5090
CPG/CPDG-10- - -50/5090
5
4
1
14
19
3
22
23
20
12
10
24
2
21
7
CPDG-03/06/10
13
6
8
15
9
Pilot Operated Check Valves
6
16 18 11
List of Seals
Item
Name of Parts
11
12
Part Numbers
CPG/CPDG-10
Qty.
CPG/CPDG-03
CPG/CPDG-06
O-Ring
SO-NB-P7
SO-NB-P9
SO-NB-P9
1
O-Ring
SO-NB-P9
SO-NB-P9
SO-NB-P9
2
13
O-Ring
SO-NB-P18
SO-NB-P28
SO-NB-P32
2
14
O-Ring
SO-NB-P21
SO-NB-P29
SO-NB-P36
1
15
O-Ring
SO-NB-G25
SO-NB-P32
SO-NB-P42
1
Note: When ordering the O-Rings, please specify the seal kit number from the table below.
List of Seal Kits
Model Numbers
Seal Kit Numbers
CPT/CPDT-03- - -50/5080/5090
KS-CPT-03-50
CPT/CPDT-06- - -50/5080/5090
KS-CPT-06-50
CPT/CPDT-10- - -50/5080/5090
KS-CPT-10-50
CPG/CPDG-03- - -50/5090
KS-CPG-03-50
CPG/CPDG-06- - -50/5090
KS-CPG-06-50
CPG/CPDG-10- - -50/5090
KS-CPG-10-50
Pilot Operated Check Valves
509
510