I-8
F
C
C
F
F
F
F
H
I
J
K
L
M
N
O
Electro-hydraulic control valve
This valve controls actuator speed in re-
sponse to the size of input current.
Pressure and control oil temperature
uctuation has little effect on setting
pressure, which enables high-precision
speed control. This valve is the perfect
choice for actuator acceleration and
deceleration control, and remote con-
trol.
•Handling
zAir Bleeding
To enable proper pres-
sure control, loosen
the air vent when start-
ing up the pump in order to bleed any
air from the pump, and fill the inside
of the solenoid with hydraulic op-
erating fluid. The position of the air
vent can change by loosening the M4
screw and rotating the cover.
xManual Flow Rate Adjusting Screw
For the initial adjustment or when
there is no input current to the valve
due to an electrical problem or some
other reason, the flow rate can be in-
creased by rotating the manual ad-
justment screw clockwise (rightward).
Normally, this adjusting screw should
be returned completely to its original
position and secured with the lock nut.
cDrain Port
Make sure that back pressure is no
greater than 0.2MPa {2kgf/cm
2
}, and
that his port is connected directly to
the fluid tank at a point that is below
the oil surface.
Model No.
Item
(C)ES-G02-
10
-(F)-12
30
ES-G03-
60
-(F)-12
125
(C)ES-G06-
250-11
ES-G10-
500-(F)-11
Maximum Operating Pressure MPa{kgf/cm
2
}
21{214} 21{214} 21{214} 21{214}
Flow Rate Control Range ℓ/min
0.5 to 10/0.5 to 30
2 to 60/2 to 125 5 to 250 15 to 500
Minimum Allowable Valve Pressure
Differential MPa{kgf/cm
2
}
1.0{10}(Note1) 1.3{13.3}(Note1)1.5{15.3}(Note1) 2{20.4}(Note1)
Reverse Flow Rate ℓ/min
(With check valve only)
50 (125)(Note3) 200 –
Hysteresis % 3 max. (Note 2) 3 max. (Note 2) 3 max. (Note 2) 3 max. (Note 2)
Rated Current mA 800 800 800 800
Coil Resistance Ω 20 (20°C) 20 (20°C) 20 (20°C) 20 (20°C)
Weight kg 8.5 13 25 55
Note) 1.
Control valve inlet and outlet pressure differential required to obtain favorable pressure compensation.
2. Value when a Nachi-Fujikoshi special amplier is used (with dithering).
3. ES-G03 does not have a built-in check valve, but a sub plate with check valve (Model No.
MCF-03-D-22) is available for it.
Model No. Bolt Size Q'ty Tightening Torque N·m{kgf·cm}
(C)ES-G02
ES-G03
(C)ES-G06
ES-G10
M 8× 80ℓ
M10× 75ℓ
M16×140ℓ
M20×160ℓ
4
4
4
4
20 to 25{ 205 to 255}
45 to 55{ 460 to 560}
190 to 235{1940 to 2400}
370 to 460{3770 to 4690}
vBundled Accessories (Valve Mount-
ing Bolts)
b
The loss coefficient and control valve
can cause resonance when there is a
great distance between the flow con-
trol valve and actuator (when the pipe
internal volume is large). Be sure to
keep the distance between the flow
control valve and actuator as small as
possible, and to avoid the use of flex-
ible hose as much as possible.
nSub Plate
See the next page for more informa-
tion about sub plates.
mUse an operating fluid that conforms
to the both of the following. Oil tem-
perature: –20 to 70°C Kinematic Vis-
cosity: 12 to 400mm
2
/s. The recom-
mended kinematic viscosity range is
15 to 60mm
2
/s.
,Since this valve has a built-in pres-
sure compensation valve, changing
of the inertial load (using a high in-
ertial oil motor, etc.) can create the
risk of hunching under certain con-
ditions. Contact your sales agent be-
fore changing the inertial load.
Note) Use a hex wrench that has a width across
ats of 8 to adjust the aperture adjust-
ment screw of nominal diameter 10.
· The gasket surface dimensions comply with the
ISO standard shown below.
(C) ES-G02…ISO 6263-06-05-0-97
ES-G03…ISO 6263-07-09-0-97
(C) ES-G06…ISO 6263-08-13-0-97
Model No. A B C D E F G H J K L M N
(C)ES-G02
66 80 132 242.8 9.7 48 102 9.4 38.1 95 22.5 14 8.8
ES-G03 61 82.5 134.5 245.3 11.2 67.8 124 11.2 50.8 124 26 17.5 11
(C)ES-G06 115 130 182 292.8 16.8 104.8 167 17 73 180 – 26 18
ES-G10 137 160 215 326.3 25 148 228 23.5 98.5 244 18 32 22
A
B
C
6
2- 6
EF
G
H J
K MAX.L
Hydraulic inlet port
(IN)
Pressure compensation piston
opening adjustment screw
Drain port
(DR)
Outlet port
(OUT)
4- Mx1 counterbore
N holes
Air vent (Air bleeding)
(hex width across ats 3)
Cover
Lock nut
Manual ow rate
adjusting screw
MAX.D
M4 set screw
(hex width across ats 2)
φ
φ
φ
ELECTRO-HYDRAULIC PROPORTIONAL
FLOW CONTROL VALVE
M
0
IN
OUT
DR
ES-G**
Electro-hydraulic Proportional
Flow Control Valve
0.5 to 500ℓ/min
21MPa
M
0
IN
OUT
DR
CES-G**
Features
Specifications
Explanation of model No.
Installation Dimension Drawings
(C)ES – G 02 – 30 – (F) – 12
Design number
Auxiliary symbol F: With pressure compensation piston
opening adjustment screw
Note: Nominal diameters 02, 03, 10 only available
Rated ow rate
Nominal diameter: 02, 03, 06, 10
Mounting method G: Gasket type
Pump type CES: Electro-hydraulic proportional ow control valve with check valve 02, 06 only
ES: Electro-hydraulic proportional ow control valve
I-9
E
C
C
E
E
E
E
H
I
J
K
L
M
N
O
Electro-hydraulic control valve
MES-03*-10
MES-06*-10
ES-G10 Mounting Gasket Surface Dimensions
Sub Plate
MES-02*-10
Auxiliary Plate with Check Valve
MCF-03-D-22
Model No. A B C D E F
MES-06X-10 45 25 16 104.8 1 55.2
MES-06Y-10 60 40 23
99 1
1
/4 62
Model No. E
MES-03Y-10 3/4
MES-03Z-10 1
Model No. E
MES-02X-10 3/8
MES-02Y-10 1/2
IN
OUT
DR
8.8 holes
4- 14x8.6 counterbore
2- 14.7
Rc "E" (back)
7x10
6
Rc 1/4 (back)
4-M8 tap holes
21
24
9.5
38.1
54
76.2
79.4
9.4
19
95
9.5
114
133
11.1
23.8
44.3
52.4
82.6
9.7
102
φ
φ
φ
φ
φ
IN
OUT
DR
11 holes
4- 17.5x1 counterbore
Rc 1/4
(back)
4-M10x20 tap
11
2-Rc "E"
(back)
2- 23
2- 7x10
0.8
20.6
50.8
74.9
101.6
102.4
11.2
23 124
12
146
170
11.2
17.5
28.6
55
61.8
80.3
86.6
101.6
11.2
124
21
38
φ
φ
φ
φ
φ
18 holes
4- 26x1 counterbore
IN
DR
OUT
4-M16x30 tap
2- 7x10
14
Rc 3/8 (back)
2- 29
2-Rc "E"
(back)
1.6
22.2
73
104.8
144.4
146
17
33 180
246
12.7
41.3
99
104.8
133.4
16.8
167
C
D
B
A
F
17
212
φ
φ
φ
φ
φ
IN
OUT
IN
OUT
DR
DR
4- 10.5 holes
2- 7x8
6
2- 23
26.7
50.8
81
101.6
102.4
0.8
11.2
124
2
11.2
28.6
61.8
86.6
101.6
11.2
124
2
30
2- 32
34 6
28.6
0.8
102.4
φ
φ
φ
φ
φ
φ
φ
2- 6
IN
DR
OUT
2- 7x8
(positioning pin hole)
6
2- 44
4-M20x30
18
56.1
145
177.8
25
228
1.6
35
98.5
144.5
196.9
198.5
23.5
244
φ
φ φ
Bundled Items (Mounting Bolts) M10 x 110ℓ (Four)
I-10
F
C
C
F
F
F
F
H
I
J
K
L
M
N
O
Electro-hydraulic control valve
Cross-sectional Drawing
ES-G**-*-11 (12)
Input Current – Flow Rate Characteristics
Oil Temperature – Control Flow Rate Characteristics
Pressure – Control Flow Rate Characteristics
Part No. Part Name
(C) ES-G02 ES-G03 (C) ES-G06 ES-G10
Part Number Q'ty Part Number Q'ty Part Number Q'ty Part Number Q'ty
24 O-ring NBR-90 P18 2 NBR-90 P26 2 NBR-90 G35 2 NBR-90 P48 2
25 O-ring NBR-90 P24 1 NBR-90 P28 1 NBR-90 G35 1 NBR-90 P48 1
26 O-ring – – – – NBR-90 G35 2 NBR-90 G50 2
27 O-ring NBR-90 P29 1 NBR-90 P29 1 NBR-90 G45 1 NBR-90 G60 1
28 O-ring NBR-90 P5 4 NBR-90 P5 4 NBR-90 P8 3 NBR-90 P9 3
29 O-ring NBR-90 P9 1 NBR-90 P9 1 NBR-90 P9 1 NBR-90 P9 1
30 O-ring NBR-90 P18 1 NBR-90 P20 1 NBR-90 G55 1 NBR-90 G75 2
31 O-ring NBR-90 P30 1 NBR-90 P38 1 NBR-90 P50 1 NBR-90 G75 1
Seal Kit Number JFS-G02 JFS-G03 JFS-G06 JFS-G10
List of Sealing Parts
Note) The materials and hardness of the O-ring conforms with JIS B2401.
Performance Curves
Hydraulic Operating Fluid Kinematic Viscosity 32mm
2
/s
0
5
10
15
20
25
30
35
0 200 400 600 800
0
20
40
60
80
100
120
140
0 200 400 600 800
0
50
100
150
200
250
300
350
0 200 400 600 800
0
100
200
300
400
500
600
700
0 200 400 600
(C)ES-G02-30
(C)ES-G02-10
ES-G03-60
ES-G03-125
Flow rate ℓ/min
Flow rate ℓ/min
Flow rate ℓ/min
67303411931185
3213211229
119102082417
2 231415221628272625
Manual adjustment
section
100
50
10
150
0
0 5020 30 40 60
Value when a Nachi-Fujikoshi special
amplier is used (with dithering).
Flow rate ℓ/min
Oil temperature °C
Supply Pressure 14MPa
Load Pressure 10MPa
Operating Fluid VG32
10 200
20
40
60
80
100
120
140
0
Flow rate ℓ/min
Value when a Nachi-Fujikoshi special
amplier is used (with dithering).
Supply Pressure 21MPa
Operating Fluid VG32
Oil Temperature 40°C
Pressure MPa {kgf/cm
2
}
{102} {204}
Note) Coil model number JD64-D2
Part No.
Part Name
Part No.
Part Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Body
Cover
Piston
Sleeve
Plug
Plug
Retainer
Sleeve
Spool
Guide
Sleeve
Retainer
Retainer
Sleeve
Piston
Ball
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Pin
Spring
Spring
Spring
Spring
Spring
Spring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
O-ring
Proportional
solenoid