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Reference: 301-P-9050089-ENG-03
Issue: 09.2022
Proportional Directional Valve System
in Sectional Design
Series SC 18
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Contents Page
1 General 3
............................................................................
1.1 Description 3
...................................................................
1.2 Application examples 3
..........................................................
2 Technical data 3
......................................................................
3 Characteristic curves 5
................................................................
3.1 Flow control characteristics 5
.....................................................
3.2 Control characteristics 5
.........................................................
3.3 Primary-pressure cut-off 5
........................................................
3.4 Secondary pressure relief 5
......................................................
3.5 Pressure differential A/B - T 5
....................................................
3.6 Circulation pressure difference 5
..................................................
4 Complete valve example 6
.............................................................
4.1 Dimensions 6
..................................................................
4.2 Circuit diagram (example) 7
......................................................
5 Inlet modules 8
.......................................................................
5.1 Overview of the inlet modules 8
...................................................
5.2 Dimensions 9
..................................................................
5.3 Ordering code 11
................................................................
6 Actuator modules 12
...................................................................
6.1 Module configuration 12
..........................................................
6.2 Module example 12
..............................................................
6.3 Overview of the actuator modules 13
...............................................
6.4 Dimensions 14
..................................................................
6.5 Main valve spool 14
..............................................................
6.6 Types of operation 15
............................................................
6.7 Dimensions of lever positions 17
...................................................
6.8 Bolt-on plates 18
.................................................................
6.9 Ordering code 21
................................................................
7 End modules 23
.......................................................................
7.1 Overview of the modules 23
.......................................................
7.2 Dimensions 23
..................................................................
7.3 Ordering code 24
................................................................
8Note 24
...............................................................................
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1 General
1.1 Description
Our sectional proportional valves regulate the flow rate to
the actuator by means of an internal closed-loop control
system. Load-independent flow control is guaranteed by in
dividual pressure compensators upstream of each propor
tional directional valve (load-sensing principle).
The highly adaptable modular system consists of an inlet
module, actuator modules (up to eight) and an end module.
The system is specially designed for use in mobile hydraul
ics. The user can be assured that the right system is always
available for every application.
S Compact sectional design
S Load sensing
S Individual supply cut-off for each actuator port
S Actuator modules with individual pressure compensators
and optional pressure relief valve, primary or secondary
S Load-independent flow control, even with
parallel operation of several actuators
S Can be used with fixed displacement pumps
and load sensing pumps
1.2 Application examples
S Mobile cranes
S Ground drilling rigs
S Container forklifts
S Applications with explosion-protection reqiuirements
(special design; please contact Bucher Hydraulics)
2 Technical data
General characteristics Unit Description, value
Design Proportional valves, sectional design,
max. 8 sections
Types of operators S Electrohydraulic proportional
S Hydraulic
S Manual (oil-tight enclosure)
S Electrohydraulic proportional - manual, combined
S Electrohydraulic proportional - hydraulic, combined
S For other types, please contact Bucher
Port type S Threaded ports to DIN 3852
(for ISO 6162 please enquire)
S SAE flange
Mounting attitude Unrestricted, but ensure good air-bleeding
Ambient temperature range °C -30 … +60
Hydraulic characteristics Unit Description, value
Hydraulic fluid HL and HLP mineral oil to DIN 51524;
for other fluids please contact Bucher Hydraulics
Hydraulic fluid temperature range °C -20 … +80 , recommended +20 … +60
Viscosity range mm
2
/
s
[cSt] 10 … 380, recommended 15…250
Minimum fluid cleanliness level to ISO 4406 : 1999 Class 20/18/15
Maximum inlet flow rate l/min 400
Maximum actuator flow rate l/min 260
Maximum pump pressure bar 370
Maximum load pressure bar 420
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Description, valueUnitHydraulic characteristics
Maximum tank pressure (port T) bar 50
Maximum tank pressure for electrohydraulic pilot
stage
bar 5(PortYorT)
Hydraulic operation Unit Description, value
Pilot-pressure range bar 6…20
Maximum pressure rating of pilot circuit bar 50
Port type Threaded port SAE
flanged port
UNF threads
Actuator A/B G1” ¾” 6000 PSI available
Pump P G1¼” 1” 6000 PSI available
Tank T G1½” 1¼” 3000 PSI available
Load sensing XL G¼” G¼” available
Pump for pilot stage X G¼” G¼” available
Tank for pilot stage Y G¼” G¼” available
Test point for pump pressure MP G¼” G¼” available
Test point for tank pressure MT G¾” G¾” available
Electrical characteristics Unit Description, value
Control current at opening point 24 V
12 V
mA 350
700
Control current at max. stroke 24 V
12 V
mA 700
1400
Hysteresis with 100 Hz PWM signal
(% of control current at max. stroke)
±3%
Protection class to EN 60 529 IP 65
Insulation class to VDE 0580 H
Supply voltage VDC 24 / 12
Coil resistance at 20 °C 24 V
12 V
21.2 ± 5 %
5.3 ± 5 %
Coil resistance at 60 °C 24 V
12 V
24.5 ± 5 %
6.1 ± 5 %
Power consumption at max. spool stroke
(coil resistance at 60 °C)
VA 10,4
Maximum current for 100 %
relative duty cycle with: 24 V
12 V
mA 750
1500
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3 Characteristic curves
3.1 Flow control characteristics
p=p
pump
-p
Load [bar]
100
0
0 20406080100
p [bar]
200
120 140 160 180 200
300
Q[l/min]
I = 100%
I=50%
150
50
250
I = 25%
3.2 Control characteristics
Control type: electrohydraulic - proportional
250
200
150
100
50
0
67891011
p [bar]
300
12 13 14 15 16 17
Q[l/min]
350
700
I[mA]
700
1400
(24V)
(12V)
18
19 20
260
3.3 Primary pressure relief
Q = Actuator flow rate at A and B
pxl = Load pressure
100
80
60
40
20
0
020406080100
p
XL
[bar]
140
120
120 140 160 180
160
180
Q[l/min]
Important
The cross-sectional geometry of the spool and the pres
sure-differential setting are factory-set so that the valve's
working range lies within the characteristic diagram.
3.4 Secondary pressure relief
Secondary pressure – flow rate characteristic curve
200
160
120
80
40
0
0 1020 304050
p [bar]
280
240
60 70 80 90
320
360
Q[l/min]
3.5 Pressure differential A/B - T
Q = Actuator flow rate at A and B
Δp = Actuator pressure - tank pressure
0
5
10
15
20
30
0 50 100 150 200 250 300 350
400
Δp
A/B-T
[bar]
450
500
25
spool type C
in neutral position
spool type A
at 100% energisation
spool type C
at 100% energisation
3.6 Circulation pressure difference
0
5
10
15
20
25
0 20 40 60 80 100 120 140 160
Δp
P-T
[bar]
180 200
Q
P-T
[l/min]
30
35
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4 Complete valve example
4.1 Dimensions
14
0
34
201.5
239
14
0
204.5
239
264
64 55 55 55 20
149
250
27
218
24
0
91.5
146.5
201.5
239
111
52
23
0
62
14
95
180
25
0
70
140
185
77
0
66
0
13
52
126.5
121
48
0
82.5
118
136
20
0
38
111
90
20
0
38
90
111
71
51
429
62
160
64
50
ca. 521
14990
P-B
P-A
AB
P
T
X
Y
XL
D1
M10x17
M10x17
A
B
AB
AB
M10x17
M10x17
a1
X1
a2
D6
D7
MP
b2
D6
D7
D6
D7
b1
23
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4.2 Circuit diagram (example)
SC18-MG320-11X-0000-00X-00-A
SC18-Y1G0-D200/D080-A260/160-E24A0X-X-HL-D230/N000-A-Z
SC18-Y2G0-D310/D060-C210/210-E24A0X-X-XX-S000/S000-A
SC18-Y3G0-D230/D230-C070/030-X00X0X-Y-XX-D260/D260-A
- SC18-EXX-00X-A
1
2
3
4
5
WV
C 210/210
TA
TB
P
XL
Y1
X2
Y3
X3
TB1
TA1
D6 D7
310bar
X2
a
21
Y3
b
X3
a1
60bar
WV
A 260/160
TA
TB
P
XL
Y2
Y1
X2
Y3
X3
TB1
TA1
D6 D7
G1
G2
TA
TB
P
XL
Y2
Y1
320bar
X2
Y3
X3
TB1
TA1
D1
DUE1
200bar
80bar
230bar
DUE8
b
Y3
X3
b2
260bar 260bar
DUE7
a1
X2
Y2
a
DUE8
b1
Y3
X3
b
230bar 230bar
WV
C 260/260
TA
TB
P
XL
Y2
Y1
X2
Y3
X3
TB1
TA1
D6 D7
Y2
DUE7
X2
a
a2
s
I
Y
P
T
MP
X
XL
X1
AB BA AB
DA DB DA DB
s
6
a1
34521
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5 Inlet modules
5.1 Overview of the inlet modules
Symbol Description
MP
TA1
TB1
TAP
XL TB
X3
X2
Y3
Y2
Y1
G1
G2
P
T
XL
XY
SC18-GG000-11X-0000-00X-00-B
S Without system pressure relief
S Without load-sensing pressure relief
S
S
PTXLXY
TA1
TB1
TA
P
XL
X3Y3
Y1
TBY2
MP
X2
G1
G2
P1
T1
DUE1
D1
SC18-MG350-11X-0000-00X-00-B
S System pressure relief
S Pressure setting in bar for system pressure relief (3-digit)
S
S
T
XL
XYP
MP
S
X1
V5
G1
G2
DUE1
D1
TA1TA
PX3Y3Y1
TB1
XL TBY2 X2
T1
P1
SC18-MG350-11X-0000-00X-20-B
S System pressure relief
S Pressure setting in bar for system pressure relief (3-digit)
S Pressure-peak reduction valve V5
S Pressure setting in bar for load-sensing pressure relief (3-digit)
X
YTP
XL
MP
TA1
TAPX3Y3
Y1
TB1
XL TBX2Y2
D1
DUE1
SC18-VG350-11X-0000-00X-00-B
S Three-way pressure compensator with system pressure relief
S Pressure setting in bar for system pressure relief (3-digit)
S
S
TPXLYX1 X2
MP
D2
D3
DUE1
D1
P1
G2
TA1
TAPX3Y3
Y1
T1
TB1
TB
X2Y2
XL
DUE0
35 bar
45 bar
SC18-MG350-01X-3545-00X-00-B
S System pressure relief
S Pressure setting in bar for system pressure relief (3-digit)
S Pilot-pressure conditioning
S
S
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5.2 Dimensions
5.2.1 SC18-GG000-11X-0000-00X-00-B
14
0
52
14
0
62
95
24
0
20
0
90
48
0
51
82.5
118
136
13
0
52
71
126.5
121
160
ca. 165
149
ca. 154
64
T
Y
X
P
XL
M10x17
MP
M10x17
5.2.2 SC18-MG350-11X-0000-00X-00-B
24
0
20
0
90
14
0
52
34
14
0
62
95
180
48
0
51
82.5
118
136
13
0
52
71
126.5
121
64 149
ca. 154
160
ca. 205
35
T
Y
X
P
XL
MP
M10x17
X1
D1
M10x17
5.2.3 SC18-MG350-11X-0000-00X-20-B
13
0
58
71
121
48
0
51
49
99
115
20
0
90
24
0
14
0
34
48
14
0
40
95
180
11
61
149
ca. 154
160
ca. 266
35
64
ca. 69
T
Y
X
P
XL
D1
M10x17
MP
X1
M10x17
5.2.4 SC18-VG350-11X-0000-00X-00-B
10
0
10
0
57
160
9.5
0
50
14
0
44
0
78.5
82.5
117
133
13
0
42
45
91
95
170
175
14960
224
4.564
69
T
Y
X
P
XL
MP
M10x17
D1
M10x17
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5.2.5 SC18-MG350-01X-3545-00X-00-B
24
0
20
0
90
48
0
69
85
118
136
14
0
55
75
126.5
121
16063
268
35
149
150
14
0
14
0
95
64
69
T
G2
X2
P
XL
Y
D1
M10x17
DUE0
X1
M10x17
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5.3 Ordering code
SC = Valve series
18 = Nominal size
Module options
(see Section 5.1)
G = without aux. valve
M = with system pressure relief
V = 3-way pressure compensator
and system pressure relief
Connection type (
see Section 5.2)
G = threaded ports
F = SAE flanges
System pressure relief [bar]
370 = specify required setting (e.g. 370 bar)
000 = with module option G
Pilot oil supply X
0 = internal
1 = external
Pilot oil unloading Y
0 = internal
1 = external
X=Not assigned
… Pilot-pressure reducing D2 [bar]
35 = standard
00 = when not fitted
… Pilot-pressure relief D3 [bar]
45 = standard
00 = when not fitted
… Pilot-pressure cut-off X2 (valve V1)
0 = without cut-off
1 = with cut-off
… Pilot-pressure cut-off X3 (valve V1)
0 = without cut-off
1 = with cut-off
X=Not assigned
Pressure-peak reducing
0 = without
2=with
X=Not assigned
B=Series identifier
…=Option (data specified by Bucher Hydraulics)
SC 18 - M G 370 - 1 0 X - 35 45 - 0 0 X - 0 X - B -
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6 Actuator modules
6.1 Module configuration
AB
X2 Y2 a b Y3 X3
Y1
Y2
Y3
X2
X3
XL
P
TB
TA
TB1
TA1
Y1
Y2
Y3
X2
X3
XL
P
TB
TA
TB1
TA1
S = sealing plug
N = make-up valve
S = sealing plug
D = pressure relief valve
N = make-up valve
S = sealing plug
D = pressure relief
D6 D7
DA DB
K = pressure relief K = pressure relief and make-up
D = test point
D7
D = test point
D6
D6 D7
DA DB
cover A
cover B
S = sealing plug
valve
and make-up valve
6.2 Module example
D6 D7
DA DB
AB
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6.3 Overview of the actuator modules
Symbol Description
Deckel A
cover A
Deckel B
cover B
X3
Y3
X3
Y3
a
b
B
A
TA1
TB1
TA
P
XL TB
X3
X2
Y3
Y2
Y1
D7
D6
TB1XL TBX2Y2
TA1TAPX3Y3Y1
SC18 - Y_G0 -_D350/D350 - C260/260 - ______-_-__ -X000/X000 - B
S Actuator module standard version
S Primary pressure relief A (D6), pressure setting in bar (3-digit)
S Primary pressure relief B (D7), pressure setting in bar (3-digit)
S
Deckel A
cover A
Deckel B
cover B
TA1
TB1
TAP
XL TB
X3
X2
Y3
Y2
Y1
A
B
D7
D6
X2
a1
a
b
a1
Y3
X3
TA
P
X3Y3Y1 TA1
TB1XL TBX2Y2
SC18 - Y_G0 -_D350/D350 - C260/260 - ______-_-__ -X000/X000 - B
S Actuator module in combination with E24B (EHA)
S Primary pressure relief A (D6), pressure setting in bar (3-digit)
S Primary pressure relief B (D7), pressure setting in bar (3-digit)
S
TA1
TB1
TA
P
XL TB
X3
X2
Y3Y1
TA
P
X3Y3Y1 TA1
TB1XL TBX2
A
B
Deckel A
cover A
Deckel B
cover B
Y2
Y2
DB
DA
D7
D6
a
Y2
X2
X3
Y3
b
SC18 - Y_G0 -_D350/D350 - C260/260 - ______-_-__ -K200/N000 - B
S Actuator module, standard
S Pressure relief / make-up, secondary, A-side, pressure setting in bar
(3-digit)
S Make-up, secondary, B-side
S
X2 a1 a b Y3X3
Deckel A
cover A
a1
Deckel B
cover B
D6
D7
TA1
TB1
TAP
XL TB
X3
X2
Y3Y1
TA
P
X3Y3Y1 TA1
TB1XL TBX2
DA
DB
A
B
SC18 - Y_G0 -_D350/D350 - C260/260 - ______-_-__ -K200/N000 - B
S Actuator module in combination with E24B (EHA)
S Pressure relief / make-up, secondary, A-side, pressure setting in bar
(3-digit)
S Make-up, secondary, B-side
S
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6.4 Dimensions
6.4.1 SC18 -Y _G0-D350/D350 - C260/260 -
____-_-__-X000/X000 - B
38
0
111
G1
ca. 218
175.5
160
55
88.5
AB
AB
D6
D7
6.4.2 SC18 -Y _G0-D350/D350 - C260/260 -
____-_-__-K200/N000 - B
55
ca. 218
175.5
160ca. 43 ca. 15
38
0
111
G1
88.5
A
B
AB
D6
D7
6.5 Main valve spool
6.5.1 Spool type
Type and symbol Description
AB
TA TBP
S Spool type A
(closed neutral position)
S Flow rate data in l/min for actuator port A (3-digit)
S Flow rate data in l/min for actuator port B (3-digit)
AB
TA TBP
S Spool type B
S Flow rate data in l/min for actuator port A (3-digit)
S Flow rate data in l/min for actuator port B (3-digit)
AB
TA TBP
S Spool type C
(throttled-open neutral position)
S Flow rate data in l/min for actuator port A (3-digit)
S Flow rate data in l/min for actuator port B (3-digit)
AB
TA TBP
S Spool type D
S Flow rate data in l/min for actuator port A (3-digit)
S Flow rate data in l/min for actuator port B (3-digit)
Note: For a spool with 2 operating positions (spool position 1), the flow rate for actuator port A is used to specify the flow rate
for actuator port B.
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6.5.2 Preferred combinations of flow rate [l/min]
Q
A
/Q
B
Q
A
/Q
B
Q
A
/Q
B
Q
A
/Q
B
Q
A
/Q
B
Q
A
/Q
B
260/260 210/210 160/160 110/110 70/70 30/30
260/210 210/160 160/110 110/70 70/30 30/15
260/160 210/110 160/70 110/30
260/110
For other combinations contact Bucher Hydraulics.
6.6 Types of operation
6.6.1 Manual “H”
Symbol Description
a
H8
a2
DUE7
b
X2 Y2 X3 Y3
S Manual operation of the main spool, mounted on the A-port side
S Without electrical operation
S Without hydraulic operation
S All lever positions can be supplied (A, L, Z)
S Control at a and b
S Follower-type hand lever
6.6.2 Hydraulic “Y”
Symbol Description
ab
a2
b2
X2 Y2 X3 Y3
DUE7
DUE8
S Hydraulic operation of main spool
S Without electrical operation
S Without manual operation
S Without damping orifice
S Control at a and b
6.6.3 Electrohydraulic proportional “E”
Symbol Description
X2
a1
Y2
DUE7
aX3
b1
Y3
DUE8
b
S Proportional pressure reducing valves
S Without displacement sensor
S Without hydraulic operation
S Without manual operation
S Damping orifice at both sides
S Control at a and b
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6.6.4 Electrohydraulic proportional and hand lever “E” + “H”
Symbol Description
X2
a1
Y2
DUE7
a
X3
b1
Y3
DUE8
b
s
I
S Proportional pressure reducing valves
S With displacement sensor
S Without hydraulic operation
S Manual operation
S Follower-type hand lever
S All lever positions can be supplied
S Damping orifice at both sides
S Control at a and b
6.6.5 Electrohydraulic proportional with Onboard Electronics “E24B”
Symbol Description
a
s
6
a1Y3X3
12
b
X2
a1
optional
S Digital interface with displacement sensor
S Electronic pilot module EHA
S Without hydraulic operation
S Manual operation can be fitted as option
S Damping orifice at both sides
S Caution: maximum supply pressure to the Onboard Electronics: 50 bar
6.6.6 Dimensions of the operation types
6.6.6.1 Manual “H”
75
79.5
75
1524
185
50
81
453
5040
121 160
BA
6.6.6.2 Hydraulic ”Y“
50
81
50
81
322
75
75
20
BA
6.6.6.3 Electrohydraulic proportional ”E“
8181
50 50
75
137
137
75
20
322
a1 b1
BA
6.6.6.4 Electrohydraulic proportional and hand
lever “E“ + ”H“
185
137
15
24
64
149160
40 50
121
430
521
66
a1
b1
BA
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6.6.6.5 Electrohydraulic proportional with electro
hydraulic actuator (EHA) ”E24B“
141
60
142
50
81
382
20
55
a/b
BA
6.7 Dimensions of lever positions
6.7.1 Lever position “A”
24
19.5
50
ca.57
50
66
90
121
75
137
ca. 260
15
P-A
P-B
6.7.1.1 Without lever “Z”
50
50.5
90
50
121
66
75
137
19.5
24
15
P-A
P-B
23°
23°
6.7.2 Lever position “L”
50
66
90
121
212
24 15
75
137
185
50
57
19.5
P-A
P-B
23°
23°
301-P-9050089-ENG-03/09.2022
Series SC 18
20/26
6.8 Bolt-on plates
6.8.1 Description
The bolt-on plates contain various functions for influencing
the load sensing function in the section. These include, for
example, a proportional pressure cut-off,a switchable pres
sure stage, or ports for an external pressure relief valve. For
more detailed information, please refer to the followingover
view.
6.8.2 Overview of the bolt-on plates
Symbol Description
XLa
XLb Y1
V1
DUE
XLsec
SC18-GG000-11X-0000-00X-00-B V000/XXXX
S Electroproportional pressure cut-off with rising characteristic for A and B
S Pressure range 350 bar
S 24 V DC
XLa XLb Y1
D6
D7
V1
DUE
XLsec
SC18-MG350-11X-0000-00X-00-B U330/U080
S Primary pressure relief A (D6), pressure setting in bar (3-digit)
S Primary pressure relief B (D7), pressure setting in bar (3-digit)
S Electroproportional primary pressure relief with rising characteristicforA
and B
S Pressure range 350 bar
S 24 V DC
XLa XLb Y1
D6
D7
V1 D8
12
DUE
XLsec
SC18-MG350-11X-0000-00X-20-B W330/W080
S Primary pressure relief A (D6), pressure setting in bar (3-digit)
S Primary pressure relief B (D7), pressure setting in bar (3-digit)
S Switchable, low pressure stage D8 for A and B, pressure setting in bar
(3-digit)
S 24 V DC
XLa XLb Y1
D6 D7
XLA XLB
XLsec
SC18-VG350-11X-0000-00X-00-B N330/N080
S Primary pressure relief A (D6), pressure setting in bar (3-digit)
S Primary pressure relief B (D7), pressure setting in bar (3-digit)
S Port XLA, G1/4", for connecting an external pressure relief valve or to use
as a test point
S Port XLB, G1/4", for connecting an external pressure relief valve or to use
as a test point
301-P-9050089-ENG-03/09.2022
Series SC 18
21/26
6.8.3 Dimensions of bolt-on plates
ca. 244
ca. 156
87
167
ca. 256
ca. 193
ca. 281
145
ca. 234
114.5
0
129
12
0
12
ABABAB
XLB
XLA
AB
301-P-9050089-ENG-03/09.2022
Series SC 18
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6.8.4 Body combinations
Important
Bolt-on plates can only be combined with certain bodies. See circuit diagram below.
XLa XLb Y1
D6
D7
XLA XLB
AB
X2 Y2 a Y3 X3
Y1
Y2
Y3
X2
X3
XL
P
TB
TA
TB1
TA1
Y1
Y2
Y3
X2
X3
XL
P
TB
TA
TB1
TA1
XLa XLb
AB
X2 Y2 a Y3 X3
Y1
Y2
Y3
X2
X3
XL
P
TB
TA
TB1
TA1
Y1
Y2
Y3
X2
X3
XL
P
TB
TA
TB1
TA1
XLa XLb
DA DB
b
Y1XLsec
Deckel DBV
cover DBV
b
Y1XLsec
Deckel DBV
cover DBV
XLa XLb Y1
V1
DUE
XLsec
XLa XLb Y1
D6
D7
V1
DUE
XLsec
XLa XLb Y1
D6 D7
V1 D8
12
DUE
XLsec
Deckel B
cover B
Deckel A
cover A
Deckel B
cover B
Deckel A
cover A
XLsec
"V000/XXXX"
"U330/U080"
"W330/W080"
"N330/N080"
301-P-9050089-ENG-03/09.2022
Series SC 18
23/26
6.9 Ordering code
6.9.1 Ordering code part 1
SC = Valve series
18 = Nominal size
Y=Actuator section
3=Actuator section number (max.8)
Connection type
G = threaded ports
F = SAE flanges
Intermediate section for SAE design
0 = threaded type / SAE flange width <
55 mm
1 = intermediate section for SAE flanges to
ISO 6162
Load sensing A (D6)
D = primary pressure relief D6, manual setting
S = sealing plug
M = test point
pressure cut-off electrically adjustable
in accordance with separate specification
N = manually set, and with test point
U = electrical and manual
pressure setting
V = electroproportional adjustment
(identical for load sensing A/B)
W = electrical on/off adjustment
…=Pressure cut-off port A, primary [bar]
000 = when pressure adjustment not fitted
Load sensing B (D7)
D = primary pressure relief D7, manual setting
S = sealing plug
M = test point
pressure cut-off electrically adjustable
in accordance with separate specification
N = manually set, and with test point
U = electrical and manual
pressure setting
V = electroproportional adjustment
(identical for load sensing A/B)
W = electrical on/off adjustment
…=Pressure cut-off port B, primary [bar]
000 = when pressure adjustment not fitted
C=Spool type (see section 7.2.3)
210 = Flow rate, port A in l/min
specify the required flow rate e.g. 210
160 = Flow rate, port B in l/min
specify the required flow rate e.g. 160
SC 18 - Y 3 G 0 - D 330 / S 000 - C 210 / 160 - E 24 A 0 X - -
-
301-P-9050089-ENG-03/09.2022
Series SC 18
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6.9.2 Ordering code part 2
E=Electrical operation
X = not fitted
Supply voltage
00 = no electrical operation
12 = 12 V DC
24 = 24 V DC
Plug connector (solenoid)
A = AMP Junior Timer
B = Deutsch DT14-6EP (EHA)
2
D = Deutsch DT04-2P
X = without solenoid
1=Manual emergency operation
(only with electrical operation type E)
0 = not fitted
X=Not assigned
Y=Hydraulic operation
X = not fitted
H=Manual operation
X = not fitted
Lever position
A = hand-lever position A
L = hand-lever position L
Z = without hand-lever
X = manual operation not fitted
Pressure relief / make up secondary [bar], A-side
D = pressure relief
N=make-up
K = pressure relief and make up
S = sealing plug
X = not fitted
150 = Pressure setting secondary [bar], A-side (N,S and X = 000)
Pressure relief / make up secondary [bar], B-side:
D = pressure relief
N=make-up
K = pressure relief and make up
S = sealing plug
X = not fitted
200 = Pressure setting secondary [bar], B-side (N,S and X = 000)
B=Series identifier
…=Option (data specified by Bucher Hydraulics)
- - - D 330 / S 000 - C 210 / 160 - E 24 A 0 X - Y - H L - D 150 / K 200 - B -
EHA = ElectroHydraulic Actuator. For further information, see data sheet 100-E-000191.
301-P-9050089-ENG-03/09.2022
Series SC 18
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7 End modules
7.1 Overview of the modules
Symbol Description
Y1
Y2
Y3 X2 X3 XL P TB TA TB1 TA1
SC18-EXX-00X-XXXX-B
S No control function
PE
TE
Y1 Y2 Y3 X2 X3 XL P TB TA TB1 TA1
SC18-EGX-11X-XXXX-B
S Tank bridge
7.2 Dimensions
7.2.1 SC18-EXX-00X-XXXX-B
10
70
140
20
90
10
160
149
20
30
M10x17
M10x17
0
0
7.2.2 SC18-EGX-00X-XXXX-B
40
80
58
120
54
20
90
30
130
50
64
74
149
160
165
M10x17
TE
PE
M10x17
0
0
0
0
0
0
301-P-9050089-ENG-03/09.2022
Series SC 18
26/26
7.3 Ordering code
SC = Valve series
18 = Nominal size
Section type
E = end section
Connection type, P and T
G = threaded
F = SAE flanges
X = not present
X Not assigned
Port P:
0 = plugged or not present
1 = open
Port T:
0 = plugged or not present
1 = open
X=Not assigned
XX = Not assigned
XX = Not assigned
B=Series identifier
…=Option (data specified by Bucher Hydraulics)
SC 18 -E G X-0 0 X-XX XX-B-
8Note
This catalogue is intended for users with specialist knowl
edge. The user must check the suitability of the equipment
described herein in order to ensure that all of the conditions
necessary for the safety and proper functioning of the sys
tem are fulfilled. If you have any doubts or questions con
cerning the use of these valves, please contact Bucher
Hydraulics.
E 2022 by Bucher Hydraulics Remscheid GmbH, D-42861 Remscheid
www.bucherhydraulics.cominfo.rs@bucherhydraulics.com
All rights reserved.
Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The
information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual
improvement, we reserve the right to amend the product specifications contained in this catalogue.
Classification: 450
