Modular Valves
D
D-28
PRESSURE REDUCING MODULAR
VALVE
Pressure Reducing
Modular Valve
40 to 300
rr
/min
25,35MPa
Features
qThis modular valve makes the pressure
in part of the circuit lower than that of
the main circuit.
wEven when pressure changes in the
primary main circuit, the reduced sec-
ondary pressure is maintained at a
constant level.
eMaximum 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
Pressure Adjustment
Range
MPa{kgf/cm
2
}
Weight
kg
Gasket Surface
Dimensions
OG-G01-PC-21
P1
P2
1/8
25
{255}
50
0.15 to 3.5{ 1.5 to 35.7}
0.8 to 7{ 8.2 to 71.4}
3.5 to 16{35.7 to 163}
1.3 ISO 4401-03-02-0-94
OG-G03-PC-(V)-J51
P1
P3
3/8
25
{255}
80
but C : 50
0.25 to 3.5{ 2.5 to 35.7}
0.8 to 7{ 8.2 to 71.4}
3.5 to 21{35.7 to 214}
3.8 ISO 4401-05-04-0-94
OGH-G04-P1-10
P3
1/2
35
{357}
300
0.8 to 7{ 8.2 to 71.4}
3.5 to 25{35.7 to 255}
8.0 ISO 4401-07-06-0-94
z
When using a remote control valve in a
vent circuit, certain vent circuit pipe
capacities can cause vibration. Because
of this, thick steel pipe with an inside
diameter of
φ
4mm that is no longer than
three meters is recommended. Vent pip-
ing cannot be used with the 01 size. If a
vent port is required for the 03 size, add
the auxiliary code "V".
x
For the 03 size, the drainage can be
allowed to escape through the T port. In
the case of a valve with the auxiliary sym-
bol B, however, run a return pipe from the
drain discharge port directly to the tank.
c
With the 04 sizes, piping is not required
because drainage can be allowed to
escape from the gasket side drain port. In
the case of a valve with the auxiliary sym-
bol B, however, run a return pipe from the
drain discharge port directly to the tank.
v
Note that a change in drain back pressure
causes a change in setting pressure.
b
With the 01, 03 sizes, the flow rate is limit-
ed at low pressures. See the Pressure-
Flow Rate Characteristics on pages D-30
for more information.
nNote that a sub plate and installation bolts
are not included. See pages D-90 through
D-95 if these items are required.
m
04 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).
,
With the 03, 04 sizes, the control port can
be changed by altering the attachment ori-
entation of the back cover. See the instal-
lation diagram for more information. After
making this change, be sure also to make
the other changes in accordance with the
model number indicated on the name-
plate.
J51–(B)–1P–03G–OG
Pressure adjustment range C, 1, 2, 3
Control port P: P port
Nominal diameter (size) 01, 03
Mounting method G: Gasket type
Pressure reducing modular valve
Design number Note: For 03 size, relationship between mounting bolts and
design number is indicated as J51: M6, 51; M8.
Auxiliary symbol B: See notes 2 and 3 under "Handling."
K: With handle (01, 03 size)
V: With vent port (03 size)
Understanding Model Numbers
01, 03, size
¡Handling
D Modular Valves(P23-46)_E.q 03.11.25 3:07 PM Page 28
Modular Valves
D
D-29
10–(B)–1P–04G–OGH
Auxiliary symbol B: See note 3 under "Handling."
Pressure adjustment range 1, 3
Control port P: P port
Nominal diameter (size) 04
Mounting method G: Gasket type
M35 Series reducing modular valve
Design number
Understanding Model Numbers
04 size
Installation Dimension Drawings
Note)
Pressure is increased by clockwise (rightward) rotation of the adjust-
ing screw (bolt), and decreased by counterclockwise (leftward) rota-
tion.
T
P
AB
Pressure gauge
attachment port
Rc 1/4
115 max.
7.5
31
46
27.5
32.5
5
20
40
18.5
40.5
807.5 75 max.
162.5 max.
189.5 max.
OG-G01-P*-21
TP X
AB Y
Pressure gauge attachment port
G1/4
Vent connection port
G1/4
Drain port
G1/4
Plug
Plug Plug
2- 3
35
70
13
6
3
91
29
45.5
55 188.6 max.
29
87141.635
293.6 max.
φ
OGH-G04-P*-10
Note) 1.Conversion to B port control is possible by changing
the back cover. Port control is determined by plug ori-
entation.
2.When replacing the back cover, be sure also to
change the nameplate to the applicable model type.
3.The tightening torque of the back cover bolts is: (M6)
10 to 13Nm (102 to 133 kgf-cm).
Note) 1.Conversion to A, B port control is possible by changing the
back cover. Port control is determined by plug orientation.
2.When replacing the back cover, be sure also to change the
nameplate to the applicable model type.
3.The tightening torque of the back cover bolts is: (M10) 45 to
55Nm (460 to 560 kgf-cm).
B
A
T
P
T
(
)
Pressure gauge
attachment port
Rc 1/4
Drain port
Rc1/8
Vent connection port
Rc 1/8
Plug
Plug
5
13
234 max.
152.5 max.
54
83
137
69.5 max.
232.5 max.
28
22
46
70
27.5
55
16
39
OG-G03-P*-(V)-J51
OG-G03-P*-J51
OG-G03-B*-J51
OGH-G04-B*-10 OGH-G04-A*-10 OGH-G04-P*-10
D Modular Valves(P23-46)_E.q 03.11.25 3:07 PM Page 29
Modular Valves
D
D-30
0406020 10080
6
7
20
21
{61.2}
{71.4}
{204}
{214}
Flow rate
r/min
Pressure
MPa {kgf/cm
2
}
OG-G03-P
1
-J51
3
10 403020 0
{204}
{61.2}
{214}
{71.4}
4
3
2
1
5
50
Flow rate
r/min
Pressure
MPa {kgf/cm
2
}
{61.2}
{71.4}
{245}
{255}
{235}
0
25
23
24
{51.0}
6
7
5
30025020015010050
Flow rate
r/min
Pressure
MPa {kgf/cm
2
}
OG-G03-PC-J51 OGH-G04-**-10
2
{04.1}
{06.1}
{08.2}
{12.2}
{14.3}
{10.2}
Flow rate
02030
r/min
10 50
1.4
40
0.2
0.4
0.6
0.8
1.0
1.2
T
P
BA
PT BA
1
1
2
{02.0}
Pressure Loss
MPa {kgf/cm
2
}
Performance Curves
Differential Hydraulic Fluid Viscosity 32mm
2
/s
T
P
BA
PT BA
DR
{10.2}
{12.2}
{14.3}
{8.2}
{6.1}
{4.1}
{2.0}
2
1
2
1
120100806040
1.2
1.0
0.8
0.6
0.4
0.2
1.4
20 0
Flow rate
r/min
Pressure Loss
MPa {kgf/cm
2
}
OG-G01-P*-21 OG-G03-P*-J51
Pressure Loss Characteristics
1
2
1
2
{2.0}
{4.1}
{6.1}
{8.2}
{14.3}
{12.2}
{10.2}
300250200150100
1.2
1.0
0.8
0.6
0.4
0.2
1.4
0
PTYXBA
PTYXBA
50
Flow rate
r/min
Pressure Loss
MPa {kgf/cm
2
}
OGH-G04-**-10
{41}
{61}
{82}
{122}
{143}
{102}
0203010 5040
{20}
10
12
14
8
6
4
2
Flow rate
r/min
Pressure
MPa {kgf/cm
2
}
{10.2}
{15.3}
{20.4}
{30.6}
{35.7}
{25.5}
0203010 5040
3.5
2.5
3.0
{5.1}
1.0
2.0
1.5
0.5
Flow rate
r/min
Pressure
MPa {kgf/cm
2
}
OG-G01-P
1
-21
2
OG-G01-PC-21
Pressure
−
Flow Rate Characteristics
D Modular Valves(P23-46)_E.q 03.11.25 3:07 PM Page 30
Modular Valves
D
D-31
100
200
300
400
0255101520
Supply Pressure
MPa {kgf/cm
2
}
{255}{102} {153} {204}{51}
Drain flow rate
cm
3
/min
OG-G01-P*-21
500
600
700
800
0255101520
{255}{102} {153} {204}{51}
Setting pressure
MPa {kgf/cm
2
}
Drain flow rate
cm
3
/min
OG-G03-P*-J51
80246 1012 14
Number of adjusting
screw rotations
Type 2
Type 1
Type C
16
14
12
10
8
6
4
2
{163}
{143}
{122}
{102}
{82}
{61}
{41}
{20}
Pressure
MPa {kgf/cm
2
}
OG-G01-P*-21
40123 56
{408}
{357}
{306}
{255}
{204}
{153}
{102}
{51}
40
35
30
25
20
15
10
5
Number of adjusting
screw rotations
Type 3
Type 1
Type C
Pressure
MPa {kgf/cm
2
}
OG-G03-P*-51
0213546
{306}
{255}
{204}
{153}
{102}
{51}
30
25
20
15
10
5
Number of adjusting
screw rotations
Type 5
Type 1
Type 3
Pressure
MPa {kgf/cm
2
}
OGH-G04-P*-10
Pressure
−
Drain Rate Characteristics
{10.2} {40.8}{30.6}{20.4} {51.0}
43215 0
200
150
250
300
Setting pressure
MPa {kgf/cm
2
}
Drain flow rate
cm
3
/min
OG-G03-PC-J51
Number of Adjusting Screw Rotations
−
Pressure Characteristics
Determine it through the maximum value when designing the circuit.
{51} {204}{153}{102} {255}
201510525 0
1400
1200
1000
800
Setting pressure
MPa {kgf/cm
2
}
Drain flow rate
cm
3
/min
OGH-G04-P3-10
D Modular Valves(P23-46)_E.q 03.11.25 3:07 PM Page 31
D
D-32
Modular Valves
765321 16 141315 11 108412
10 18 19 17
9
Cross-sectional Drawing
OG-G01-P2-21
65421 14 121113 9 8310
8161715
7
OG-G01-PC-21
Part
No.
Part Name Part Number
Q'ty
P
13 O-ring 1B-P9 4
14 O-ring 1A-P18 1
15 O-ring 1B-P20 1
16 O-ring 1B-P26 1
Seal Part List (Kit Model Number BRBS-01GP*)
Note) O-ring 1A/B-** refers to JIS B2401-1A/B.
Part
No.
Part Name Part Number
Q'ty
P
11 O-ring 1B-P9 4
12 O-ring 1A-P18 1
13 O-ring 1B-P20 1
14 O-ring 1B-P26 1
Seal Part List (Kit Model Number BRBS-01GP*)
Note) O-ring 1A/B-** refers to JIS B2401-1A/B.
Note)
Part number 8 is used in the case of pressure
adjustment range type 2 only.
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Body
Spool
Push rod
Bushing
Retainer
Guide
Spring
Spring
Plate
Screw
Nut
Plug
O-ring
O-ring
O-ring
O-ring
Knob
Nut
Screw
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Body
Spool
Bushing
Retainer
Guide
Spring
Plate
Screw
Nut
Plug
O-ring
O-ring
O-ring
O-ring
Knob
Nut
Screw
D Modular Valves(P23-46)_E.q 03.11.25 3:07 PM Page 32
Modular Valves
D
D-33
2712 6 10 7 8 914 1129 412 22 1 1535
16
1921 22024 182528 26 13
23
17 30
Drain port
Rc 1/8
"P" plug
OG-G03-P*-J51
2628 12 27
13 24 20
23
221 185171512212 430 1114 987106
25
16
1929
31 3
OG-G03-PC-J51
Part
No.
Part Name Part Number
Q'ty
P
20 O-ring 1B-P6 2
21 O-ring 1A-P10A 1
22 O-ring 1B-P12 1
23 O-ring AS568-014(Hs90) 5
24 O-ring 1B-P18 1
25 O-ring AS568-023(Hs90) 1
Seal Part List (Kit Model Number BRES-03GP-1A)
Note) O-ring 1A/B-** refers to JIS B2401-1A/B.
Part
No.
Part Name Part Number
Q'ty
P
20 O-ring 1B-P6 2
21 O-ring 1A-P10A 1
22 O-ring 1B-P12 1
23 O-ring AS568-014(Hs90) 5
24 O-ring 1B-P18 1
25 O-ring AS568-023(Hs90) 1
Seal Part List (Kit Model Number BRES-03GP*-1A)
Note) O-ring 1A/B-** refers to JIS B2401-1A/B.
Part No.
Part Name
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Nut
Screw
Plug
Plug
Plug
Plug
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
Knob
Nut
Screw
Pin
Pin
Note) Draining through the escape valve piped to
the drain discharge port is standard. : OG-
GO3-P*-B-J51
Position the end plate (TPHA-1/8) to the
drain discharge port, then connection is
made to the T port if the "P" plug (TPUA-
1/16) is removed. :OG-GO3-P*-J51.
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
Body
Cover
Spool
Poppet
Seat
Bushing
Retainer
Choke
Spring
Spring
Plate
Screw
Nut
Part No.
Part Name
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Body
Cover
Spool
Poppet
Seat
Bushing
Retainer
Choke
Spring
Spring
Plate
Screw
Nut
Nut
Screw
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Plug
Plug
Plug
Plug
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
Knob
Nut
Screw
Choke
Pin
Pin
D Modular Valves(P23-46)_E.q 03.11.25 3:07 PM Page 33
Modular Valves
D
D-34
2513 721 9 81611 12319252732022424 1012 6 14 17 1526 1828
Drain port
G1/4
P
OGH-G04-P*-10
Part
No.
Part Name Part Number
Q'ty
G GB
19 O-ring 1B-P7 4 4
20 O-ring AS568-012(Hs90) 2 2
21 O-ring 1A-P11 1 1
22 O-ring AS568-118(Hs90) 4 4
23 O-ring 1B-G25 2 2
27 O-ring 1B-P8 4 4
28 O-ring 1B-P11 3 2
Seal Part List (Kit Model Number BRKS-04**)
Note) 1.O-ring 1A/B-** refers to JIS B2401-1A/B.
2.Specify G (internal drain) or GB (external drain) for the
asterisk (*) in the kit model number.
Note)
In the standard configuration, OGH-G04-P*-10 does
not require a P plug, while OGH-G04-P*-B-10
requires a P plug (TPUA-1/16) and drain pipe from
the cover.
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Body
Cover
Cover
Spool
Poppet
Seat
Plunger
Retainer
Plate
Collar
Choke
Spring
Spring
Spring
Screw
Plate
Nut
Screw
O-ring
O-ring
O-ring
O-ring
O-ring
Pin
Plug
Plug
O-ring
O-ring
D Modular Valves(P23-46)_E.q 03.11.25 3:07 PM Page 34
