Modular Valves
D
D-79
Pilot Operated Check
Modular Valve
50 to 300
rr
/min
25,35MPa
Features
qThis modular valve is used to prevent
actuator self-running and to maintain
actuator position.
wMaximum Operating Pressure: 25,
35MPa {255, 357kgf/cm
2
}
Specifications
Model No.
Nominal
Diameter
(Size)
Maximum Working
Pressure
MPa{kgf/cm
2
}
Maximum
Flow Rate
r/min
Cracking pres-
sure
MPa{kgf/cm
2
}
Area Ratio
Weight
kg
Gasket Surface
Dimensions
Pilot Piston
Check Valve
Seat
Needle Valve
Seat
OCP-G01-W1-21
W2
1/8 25{255} 50
0.2{2.0}
0.5{5.1}
1 0.37
⎯
1.2
ISO 4401-03-02-0-94
OCP-G01-A1-21
A2
0.2{2.0}
0.5{5.1}
OCP-G01-B1-21
B2
0.2{2.0}
0.5{5.1}
OCP-G01-W1-F-21
W2
0.2{2.0}
0.5{5.1}
1 0.51 0.06 1.2
OCP-G01-A1-F-21
A2
0.2{2.0}
0.5{5.1}
OCP-G01-B1-F-21
B2
0.2{2.0}
0.5{5.1}
OCP-G03-W1-J50
W2
3/8 25{255] 100
0.2{2.0}
0.5{5.1}
1 0.49 0.07
3.6
ISO 4401-05-04-0-94
OCP-G03-A1-J50
A2
0.2{2.0}
0.5{5.1}
OCP-G03-B1-J50
B2
0.2{2.0}
0.5{5.1}
OCP-G03-W1-D-J50
W2
0.2{2.0}
0.5{5.1}
1 0.49
⎯
OCP-G03-A1-D-J50
A2
0.2{2.0}
0.5{5.1}
OCP-G03-B1-D-J50
B2
0.2{2.0}
0.5{5.1}
OPH-G04-W1-10
W2
1/2 35{357} 300
0.2{2.0}
0.5{5.1}
1 0.50 0.07
6.8
ISO 4401-07-06-0-94
OPH-G04-A1-10
A2
0.2{2.0}
0.5{5.1}
OPH-G04-B1-10
B2
0.2{2.0}
0.5{5.1}
OPH-G04-W1-D-10
W2
0.2{2.0}
0.5{5.1}
1 0.50
⎯
OPH-G04-A1-D-10
A2
0.2{2.0}
0.5{5.1}
OPH-G04-B1-D-10
B2
0.2{2.0}
0.5{5.1}
zNote that when the 01 size has the
auxiliary symbol "F," tank port back
pressure can cause the small valve
to open, making it impossible to
maintain pressure.
xIf tank port back pressure causes the
small valve to open and make it
impossible to maintain pressure with
the 03, 04 size, use a direct type with
auxiliary symbol "D."
cMinimum pilot pressure fluctuates
with the input side pressure during
reverse flow. Operate the valve so
pressure is at least twice as high as
the required pressure obtained using
the minimum pilot pressure charac-
teristics graph.
vNote that a sub plate and installation
bolts are not included. See pages D-
90 through D-95 if these items are
required.
b04 series modular valves do not
have an L (DR
2) drain port, so they
cannot be used in combination with
pressure center type solenoid valves
(D).
¡Handling
PILOT OPERATED CHECK
MODULAR VALVE
D
D-80
Modular Valves
10–(D)–1W–04G–OPH
Auxiliary symbol D: No small valve poppet
Cracking pressure 1: 0.2MPa{2.0kgfcm
2
}
2: 0.5MPa{5.1kgfcm
2
}
Control port W: A, B ports A: A port B: B port
Nominal diameter (size) 04
Mounting method G: Gasket type
M35 Series pilot operated check modular valve
Design number
Understanding Model Numbers
04 size
Installation Dimension Drawings
T
P
A
B
60.5
40.532
1077
121
23
32.5
31 7.5
46
24.5
40
TT
P
AB
93
180
46
70
55
OCP-G01-**-(F)-21 OCP-G03-**-(D)-J50
YBA
XPT
2- 3 pin
62
112
50.8
224
122
51.2
48
91
43
70
3
φ
OPH-G04-**-(D)-10
J50–(D)–1W–03G–OCP
Cracking pressure 1: 0.2MPa{2.0kgfcm
2
}
2: 0.5MPa{5.1kgfcm
2
}
Control port W: A, B ports A: A port
B: B port
Nominal diameter (size) 01, 03
Mounting method G: Gasket type
Pilot operated check modular valve
Design number
Note: For 03 size, relationship between mounting bolts and
design number is indicated as J50: M6, 50 : M8.
Auxiliary symbol F: With shock-resistant mechanism (01 size only)
D: No small valve poppet (03 size only)
Understanding Model Numbers
01, 03 size
Modular Valves
D
D-81
Pressure Loss Characteristics (Reverse Free Flow)
Performance Curves
Hydraulic Operating Fluid Viscosity 32mm
2
/s
OCP-G01-W*-21 OCP-G01-W*-F-21 OCP-G03-W*-(D)-J50
Pressure Loss Characteristics
5010 3020 0
{10.2}
{14.3}
{12.2}
{8.2}
{6.1}
{4.1}
{2.0}
2
1
1.2
1.0
0.8
0.6
0.4
0.2
40
1.4
3
Flow rate r/min
Pressure Loss
MPa {kgf/cm
2
}
1
2
3
5010 3020 0
{10.2}
{14.3}
{12.2}
{8.2}
{6.1}
{4.1}
{2.0}
1.2
1.0
0.8
0.6
0.4
0.2
40
1.4
Flow rate r/min
Pressure Loss
MPa {kgf/cm
2
}
20 0
{30.6}
1
0.5
A
B
2
P
→
(Type 1)
2
1
1.0
1.5
2.0
2.5
3.0
{25.5}
{20.4}
{15.3}
{10.2}
{5.1}
40 60 80
100 120
Flow rate r/min
Pressure Loss
MPa {kgf/cm
2
}
OCP-G03-W*-J50 OPH-G04-W*-10
20 0
{30.6}
0.5
1.0
1.5
2.0
2.5
3.0
{25.5}
{20.4}
{15.3}
{10.2}
{5.1}
40 60 80
100 120
Flow rate r/min
Pressure Loss
MPa {kgf/cm
2
}
{15.3}
0.5
1.0
3.0
2.5
1.5
2.0
{10.2}
{25.5}
{30.6}
{20.4}
050
250 300
{5.1}
200150100
1
2
3
Flow rate r/min
Pressure Loss
MPa {kgf/cm
2
}
Minimum Pilot Pressure Characteristics
OCP-G01-**-21 OCP-G01-**-F-21 OCP-G03-W*-(D)-J50
{51}
51510 0
{204}
{255}
{102}
20
15
25
20
10
5
{153}
25
{51} {102} {153} {204} {255}
Reverse flow inlet side pressure
MPa {kgf/cm
2
}
Minimum pilot pressure
MPa {kgf/cm
2
}
Small valve
2
1
Main check valve
1
2
{51}
51510 0
{204}
{255}
{102}
20
15
25
20
10
5
{153}
25
{51} {102} {153} {204} {255}
Reverse flow inlet side pressure
MPa {kgf/cm
2
}
Minimum pilot pressure
MPa {kgf/cm
2
}
{30.6}
Auxiliary symbol: D
{20.4}
{51.0}
{40.8}
{10.2}
2
1
Auxiliary symbol: None
1
2
3
4
6
5
{61.2}
1
2
51510 02025
{51} {102} {153} {204} {255}
Reverse flow inlet side pressure
MPa {kgf/cm
2
}
Minimum pilot pressure
MPa {kgf/cm
2
}
OPH-G04-W*-(D)-10
1
{51}
2
0
{204}
{306}
{255}
{102}
20
15
25
30
10
5
{153}
2010 15525
{51} {102} {153} {204} {255} {306}
30
{357}
35
Auxiliary symbol: D
2
1
Auxiliary symbol: None
Reverse flow inlet side pressure
MPa {kgf/cm
2
}
Minimum pilot pressure
MPa {kgf/cm
2
}
D
D-82
Modular Valves
134678910 1112 13
Cross-sectional Drawing
OCP-G01-A*-21
510 34768111221913
OCP-G03-A*-J50
Part
No.
Part Name Part Number
Q'ty
W A B
12 O-ring 1B-P9 4 4 4
13 O-ring 1B-P18 2 2 2
Seal Part List (Kit Model Number BDBS-01CP)
Note) 1.O-ring 1A/B-** refers to JIS B2401-1A/B.
2.Specify W, A, or B for the asterisk (*) in the kit model number.
Part
No.
Part Name Part Number
Q'ty
W A B
11 O-ring
AS568-014(Hs90)
5 5 5
12 O-ring 1B-P29 2 2 2
Seal Part List (Kit Model Number BDES-03CP*)
Note) 1. O-ring 1A/B-** refers to JIS B2401-1A/B.
2. Specify W, A, or B for the asterisk (*) in the kit model number.
2457891013
OCP-G01-A*-F-21
OCP-G03-**-D-J50
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
Body
Poppet
Piston
Seat
Rod
Bushing
Spring seat
Guide
Spring
Ball
Plate
O-ring
O-ring
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
Body
Cover
Poppet
Poppet
Piston
Seat
Bushing
Spring
Plate
Screw
O-ring
O-ring
Pin
D
D-83
Modular Valves
10245179611 1214 8 313 15
OPH-G04-A*-10
Part
No.
Part Name Part Number
Q'ty
W A B
12 O-ring
AS568-012(Hs90)
2 2 2
13 O-ring
AS568-118(Hs90)
4 4 4
14 O-ring
AS568-127(Hs90)
2 2 2
Seal Part List (Kit Model Number BDKS-04CP*)
Note)1.Specify W, A, or B for the asterisk (*) in the kit model number.
OPH-G04-**-D-10
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Body
Cover
Cover
Poppet
Poppet
Piston
Seat
Bushing
Spring
Plate
Screw
O-ring
O-ring
O-ring
Pin