Internal Drain Type External Drain Type
Pilot Controlled Check Valves
DIRECTIONAL CONTROLS
■
Pilot Controlled 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.
■ Specifications
■ Model Number Designation
Model Numbers
Rated Flow *
L/Min.
Max. Operating Pres.
Kgf/cm
2
Cracking Pres.
Kgf/cm
2
Mass
Kg
Sub-plate Mounting
CP G-06- - -20
125 250
0.35, 2
3.5, 5
7
* Rated flow is the approximate flow rate, when there is a free flow pressure drop of maximum 3 Kgf/cm
2
the
fluid has a specific gravity of 0.85, kinematic viscosity of 20cSt, and the cracking pressure is 0.4 Kgf/cm
2
.
F- CP G 06 -E -30 -20
Series
Number
Type of
Connection
Type of
Connection
Valve
Size
Drain
Connection
Cracking Pres.
Kgf/cm
2
Design
Number
F:
Special seals for
phosphate ester
type fluid (Omit
if not required)
CP:
Pilot Controlled
Check Valve
CPD:
Decompression
Type Pilot
Controlled
Check Valve
G:
Sub-plate
Mounting
06
None:
Internal
Drain
E:
External
Drain
5 : 0.35
30 : 2.0
50 : 3.5
75 : 5.0
20
■ Mounting Bolts
Valve
Model Numbers
Socket head
Cap screw
Qty.
Bolt Kit
Model
Number
CP -G-06
M10 x 80 Lg. 4 BKHCG-06-20
■ Sub-plates
Valve
Model
Numbers
Sub-plate
Model
Numbers
Thread
Size
Approx.
Mass
Kg.
CP G-06
HGM-06-2080 3/4 BSP.F 2.4
HGM-06X-2080 1 BSP.F 3.0
Sub-plates are available, specify sub-plate model from the table above. When sub-plates are used, the
mounting surface should have a good machined finish.
■ Instructions
Operation of internal drain and external drain types
When the outlet side P1 is directly connected to the tank in
reversed free flow (Fig. a), internal drain type is normally
used. When the back pressure is applied to the outlet side P1
(Fig. b), be sure to use external drain type.
Minimum pilot pressure characteristics
That depends on the pressure of inlet side in the reversed free
flow. This value can be determined from the characteristics
chart.
(a) (b)
P2
P1
DR
P2
P1
Graphic Symbol
EIC-E-1008-0
Pilot Controlled Check
Valves
413
E
Pilot Controlled Check Valves
DIRECTIONAL CONTROLS
11.3
51
79.4
168
54
102
Free Flow Outlet or
Reversed controlled
Flow Inlet Port
Drain Port
Free Flow Inlet or
Reversed controlled
Flow Outlet Port
Pilot Port
11 Dia. x Thru.
17.5 Dia. Spotface
4 Places
40
6
69
80
Locating Pin
6 Dia.
Mounting Surface
(O-Ring Furnished)
CPG
CPDG
16
G
11.1
20.6
39.7
44.5
49.2
60.3
93
16.4
6.4
39.7
73
F
22
E
D
104C
B
11.3 79.4
102
M10 Thd. x 20 Deep
4 Places
8.8 Dia. x Thru.
14 Dia. Spotface
4 Places
'A' BSP.F Thd.
2 Places (From Rear)
7 Dia. x 10 Deep
22 Dia. 2 Places
5 Dia. x Thru.
1/4 BSP.F Thd.
2 Places
(From Rear)
Plug the drain port
for the valve of
internal drain type.
06
06X
Sub-plate
Model Numbers
A B C D E F G
Mass
(Approx.) Kg.
HGM-06-2080 3/4
124 10 77 27 73 36 2.4
HGM-06X-2080 1 136 16 80 24 75 45 3
Mounting sub-plate are available on requests. Specify sub-plate model
number from above table. When sub-plates are not used, mounting
surface as shown by shaded area must be finished flat and smooth.
-06- - -20
Sub-plate: HGM- -2080
DIMENSIONS IN
MILLIMETRES
414
Pilot Controlled Check Valves
DIRECTIONAL CONTROLS
■ Spare Parts List
List of Seals
Sl.
No.
Name of part Part No. Qty
1 O – Ring SO-NB-P8 1
2 O – Ring SO-NB-P9 2
3 O – Ring SO-NB-P28 2
4 O – Ring SO-NB-G35 2
5 O – Ring SO-NA-P22A 1
6 Backup Ring SO-BB-P22A 2
Note : When ordering the seals,
please specify the seal kit number KS-CP G-06-20
Pressure Drop for Free Flow
Pressure Drop for Reversed
Controlled Flow.
Pilot Pressure Chart
Pressure Drop For Reversed Controlled Flow
Only When Decompression Valve is Opened
0
50
100
Pressure Drop
150
200
20 40 60 80 100
L/min
Flow
Kgf/cm² Oil Viscosity ---32cSt
Pilot Controlled Check
Valves
415
E
50 100 150 200
L/min.
Flow
0
4
8
12
Kgf/cm²
Pressure Drop
Oil Viscosity ---32cSt
0
1
2
3
50 100 150 200
L/min.
Flow
Kgf/cm² Oil Viscosity ---32cSt
M
I
N
.
P
I
L
O
T
P
R
E
S
S
U
R
E
T
O
O
P
E
N
T
H
E
D
E
C
O
M
P
R
E
S
S
I
O
N
V
A
L
V
E
TYPE "CPG" TYPE "CPDG"
TYPE "CPDG"
0
20
40
60
80
100
120
Kgf/cm²
50 100 150 200 250
Kgf/cm²
Minimum Pilot Pressure (PP)
Supply Pressure (P2)
P2
P1
PP
P2
P1
PP
P2
P1
PP
C
P
G
-
0
6
-
-
5
0
Cracking Pressure
5 Kgf/cm²
Cracking Pressure
0.35 Kgf/cm²
Cracking Pressure
5 Kgf/cm²
Cracking Pressure
0.35 Kgf/cm²
