301-P-9050084-EN-02/08.2015
Series SC 22
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Contents Page
1 Description 3
.........................................................................
1.1 Application
examples 3
..........................................................
2 Technical
data 3
......................................................................
3 Performance
graphs 5
.................................................................
3.1 Control
characteristics 5
.........................................................
3.2 Flow-control
characteristics 5
.....................................................
3.3 Primary-pressure
cut-off 5
........................................................
3.4 Pressure
differential
at
directional
valve
spool
–
Return 5
.............................
3.5 Secondary
pressure
relief
(optional) 5
.............................................
4 Circuit
diagram 6
.....................................................................
4.1 Proportional
valve
with
one
inlet
module
and
two
actuator
modules
with
three
sections 6
..
5 Dimensions 7
........................................................................
5.1 Dimensions,
complete
valve 7
....................................................
5.2 Dimensions,
manual
operator 9
...................................................
6 Ordering
code 10
......................................................................
6.1 Inlet
module 10
..................................................................
6.2 End
module 11
..................................................................
6.3 Actuator
module 12
..............................................................
7 Modules 13
...........................................................................
7.1 Inlet
modules 13
.................................................................
7.2 End
module
without
actuator
section 14
.............................................
7.3 Actuator
modules 15
.............................................................
7.4 Spool
type
/
Symbol 16
...........................................................
8 Fluid 16
..............................................................................
9Note 16
...............................................................................
10 Fluid
cleanliness 16
....................................................................
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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, ac
tuator modules (with up to eight sections), and an end mod
ule and is specially designed for use in mobile hydraulics.
The user can be assured that the right system is always
available for every application.
This is accomplished by:
S Various inlet modules
S Actuator modules with individual compensator and op
tional, individually adjustable, primary and secondary
pressure-relief valves
S Various types of operators
Use Section 6, “Ordering code”, to establish the complete
valve code.
1.1 Application examples
S Mobile Crane
S Ground Drilling
S Reach Stacker
S Cargo Handling Crane
S Ship Crane
S Application in explosion protection areas e.g. ATEX,
IECEx, MSHA (please consult Bucher Hydraulics)
2 Technical data
General characteristics Unit Description, Value
Design proportional valves, sectional design, spool type
Types of operators S electro-hydraulic proportional
S hydraulic
S manual (oil-tight enclosure)
S electro-hydraulic proportional - manual, combined
S electro-hydraulic proportional - hydraulic combined
S for other types, please consult Bucher
Size port sizes to DIN 3852
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 51 524;
for other fluids, please consult BUCHER
Hydraulic fluid temperature range °C -20 … +80, recommended +20 … +60
Viscosity range mm
2
/s
(cSt)
10 … 500, recommended 15 ... 250
Minimum fluid cleanliness
Cleanliness class to ISO 4406:1999
class 20/18/15
Maximum pump flow rate l/min 500
Maximum actuator flow rate l/min 340 (400 l/min – consult Bucher)
Maximum pump pressure bar 370
Maximum load pressure bar 420
Required controlΔp on the control block see performance graphs,
3.2 flow control characteristics
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Description, valueUnitHydraulic characteristics
Maximum tank pressure bar 50
Maximum tank pressure with elec. pilot stage bar 5
Hydraulic operation Unit Description, value
Pilot-pressure range bar 6 … 20
Pressure rating of pilot circuit bar max. 50
Size Unit Description, value
Actuator A / B G1¼”
Pump P G1¼”
Tank T G1½”
Load sensing XL G¼”
Pump for pilot stage X G¼”
Tank for pilot stage YG
3
/
8
”
Test point for pump pressure MP G¼”
Electrical characteristics Unit Description, value
Control current at opening point 24V
12V
mA 325
650
Control current at max. stroke 24V
12V
mA 680
1360
Hysteresis with 100 Hz PWM signal
(from control current at max. stroke)
±3%
Protection class to EN 60 529 IP65
Insulation class to VDE 0580 H H
Supply voltage V 24 / 12
Coil resistance at 20°C 24V
12V
21.2 ± 5%
5.3 ±5%
Coil resistance at 60°C 24V
12V
24.5 ±5%
6.1 ±5%
Power consumption at max. spool stroke
(coil resistance at 60 °C)
VA 10.4
Relative duty cycle (ED) - limiting current:
24V
12V
mA
750
1500
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3 Performance graphs
3.1 Control characteristics
Control mode: electrohydraulically - proportional
Q=f(p
st
)
Q [%]
Dp [bar]
I [mA]
325
650
680 (24 V)
1360 (12 V)
20
40
60
80
100
104 6 8 1214161820
3.2 Flow-control characteristics
p = p
Pump
- p
Last
[ bar]
Q[l/min]
I = 100%
(680mA)
I = 75%
(590mA)
I = 50%
(500mA)
350
300
250
200
150
100
50
0
Dp [bar]
0 50 75 100 125 150 175 200 225 250
3.3 Primary-pressure cut-off
Q =Actuator flow rate at A or B
P
XL
= Load pressure characteristic
Q
[l/min]
100
150
200
0
50
0 20 40 60 80 100 120 140 160 180 200
P
XL
[bar]
3.4 Pressure differential at directional
valve spool – Return
Pressure differential - Flow rate characteristic
0 50 100 150 200 250 300
350
0
2
4
6
8
10
12
Q [l/min]
Dp [bar]
1 3
2
1 Spool type C in neutral position
2 Spool type C at 100% energisation
3 Spool type A at 100% energisation
3.5 Secondary pressure relief (optional)
Secondary pressure - flow rate characteristic
P
A/B
- P
T
= f (Q
A/B
-> T)
0
10 20
30
40 50 60 70 80 90 100
50
100
150
200
250
300
350
0
Dp [bar]
Q [l/min]
IMPORTANT!
The cross-sectional geometry of the spool
and the pressure-differential setting are fac
tory-set so that the valve's working range
lies within the characteristic diagram.
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4 Circuit diagram
4.1 Proportional valve with one inlet module and two actuator modules with three
sections
MP
XL
T
P
Y
X
TA
35 bar
D2
TB
P
XL
X
Y2
Y1
DUE0
45 bar
FI
V1
X4
X5
DUE2
350 bar
D3
D1
DUE1
G2
X1
DUE3
MT
G1
X6
V2
P
XLT
A1 B1
QA = 260 l/min
DUE1
RV1
D1
D4
A2 B2
DUE2
RV2
D3
TA
TB
P
XL
X
Y2
Y1
a1
b1
a2
b2
DUE7
DUE8
DUE9
DUE10
D2
W V1
W V2
DUE3
DUE4
DUE6
DUE5
DA1 DB1
350 bar
350 bar
330 bar
200 bar
230 bar
QB = 160 l/min
QA = 330 l/min
QB = 150 l/min
”0” ”1” ”2”
250 bar
100 bar
A B
DUE1
RV1
D1
D2
W V1
DUE3
DUE4
a
b
DUE7
DUE8
”3”
QB = 290 l/min
QA = 290 l/min
H8H8 H8H8
Ordering Example:
„0“ = SC22 - K01 - 111 - 350 - 35 - 45 - 0 - A
„1“ = SC22 - 1 - 1Y10 - 000 / 330 - C330 / 150 - K20 - L01 - D350 / D350 - A
„2“ = SC22 - 2 - 2Y10 - 200 / 230 - A260 / 160 - K20 - L01 - S000 / N000 - A
„3“ = SC22 - 3 - 0D00 - 100 / 250 - C290 / 290 - E20 - X11 - S000 / S000 - A
DA2 DB2
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5.2 Dimensions, manual operator
5.2.1 Arrangement on the valve body
77
AB
Pressure/compensator
/ spool axis
Main spool axis
5.2.2 Without hand lever “Z”
P −B
P −A
74
2
M12
51.5
11 9
18 35
19°
19°
16.5
53
119
5.2.3 Hand lever position “A”
P −B
P −A
119
51.5
M12
2
74
1
9
°
1
9
°
18
35 16.5
53
11 9
~ 367
5.2.4 Hand lever position “F”
P −A
P −B
18
1
9
°1
9°
35 16.5
53
119
~367
2
74
M12
51.5
119
5.2.5 Hand lever position “L”
P −AP −B
18 35
19°
19°
16.5
53
119
~ 283
~283
2
74
M12
51.5
11 9
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6 Ordering code
6.1 Inlet module
SC
SC = Proportional valve in sectional design
22 = Nominal size
Circuit options: see section 7.1
G = without aux. valve
M = with system pressure relief, EUM
1)
optional
K = with system pressure relief, pilot-pressure conditioning
(pressure reducing and pressure relief),
optional pilot-oil supply shut-off, EUM
1)
optional,
p-peak cut-off valve optional, ports for
external pilot-oil filtration optional.
V = 3-way pressure compensator
1 = with ports for external pilot-oil filtration (standard)
0 = without ports for external pilot-oil filtration
1 = with LS unloading (standard)
0 = without LS unloading
0 = without pilot-pressure shut-off (standard)
1 = with pilot-pressure shut-off (only possible with K)
0 = without pressure-peak reducing valve 50 bar
1 = with pressure-peak reducing valve 50 bar, Q
max
= 30 l/min
(not in combination with EUM
1)
)
2 = with pressure-peak reducing valve / circulating pump valves
Qmax = 60 l/min (higher flow rates on request)
1 = pilot-pressure supply “X” internal / pilot-pressure drain “y” internal
2 = pilot-pressure supply “X” internal / pilot-pressure drain “y” external
3 = pilot-pressure supply “X” external / pilot-pressure drain “y” internal
4 = pilot-pressure supply “X” external / pilot-pressure drain “y” external
… = system pressure relief in bar
000 = with circuit option G
… = pilot-pressure reducing in bar (standard 35 bar)
00 = with circuit options G and V
… = pilot-pressure relief in bar (standard 45 bar)
00 = with circuit options G and V
0 = without EUM
1)
2 = with EUM
1)
(not in combination with pressure-peak reducing valve 1)
… = series identifier (e.g.A)
… = special feature as per description (e.g.Z)
-
Z
A-
45
3 280 -
35
-
-
11
-
11K
-
22
0
-
1) EUM = Electronic Undersupply Management.
Prevents stand still of loads in undersupply situations. More informations see data sheet 301-P-9050091
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Series SC 22
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6.2 End module
SC = proportional valve in sectional design
22 = nominal size
E = end plate
1 = with P-port (standard)
0 = without P-port
1 = with T-port (standard) with connection TA-TB
0 = without T-port
1 = with XL-port (standard)
0 = without XL-port
0 = without pilot-oil supply X
0 = without pilot-oil drain Y2
… = series identifier (e.g.A)
… = special feature as per description (e.g.Z)
-
Z
A
-
0
01
-
11E-
SC 22
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6.3 Actuator module
proportional valve in sectional design = SC
nominal size = 22
actuator section number, max. 8 (see Section 7.3) = …
Section design:
single module = 0
dual module, 1st section = 1
dual module, 2nd section = 2
Section type:
with intermediate module = Y
end module (for single module only) = D
Pressure relief / make-up, A/B-sides (secondary):
without (for all A and B ports on single or dual segments) = 0
with (for all A and B ports on single or dual segments) = 1
unaccounted = 0
Pressure cut-off, A-side (primary) in bar
(A-<B-side) =…
when pressure adjustment not fitted = 000
Pressure cut-off, B-side in bar (primary) = …
when A-side 000 (A/B sides same) = 000
spool type (see Section 7.4), optionally A,B,C,D = …
… = flow rate QA in l/min, A-side
000 = without flow rate
… = flow rate QB in l/min, B-side
000 = without flow rate
Type of operation:*
E10 = electro-hydraulic proportional 12V
E20 = electro-hydraulic proportional 24V available with
H80 = manual certificates:
K10 = combination of E10 and H80 ATEX, IECEx
K20 = combination of E20 and H80 and MSHA
Y00 = hydraulic
Lever position with manual operation: (see section 5.2):
… = hand-lever position optional A, F, L
X = without manual operating
Z = without hand-lever
0 = without manual override
1 = with manual override (only with E10 / E20 and K10 / K20)
0 = AMP Junior Power Timer (standard) mating plug
1 = with plug Deutsch not supplied
2 = without plug connector
Pressure relief / make-up, A-side (secondary):
D = pressure relief
N = make-up
K = pressure relief and make-up
S = not fitted
… = pressure setting (bar), A-side (S, N = 000)
Pressure relief / make-up, B-side (secondary):
D = pressure relief
N = make-up
K = pressure relief and make-up
S = not fitted
… = pressure setting (bar), B-side (S, N = 000)
… = series identifier (e.g.A)
… = special feature as per description (e.g.Z)
-
Z
A-000-N/150D-01Z-E20-300/
300
C-300/150-0
0
Y1-1-22
SC
* other types of operation on request
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7 Modules
7.1 Inlet modules
7.1.1 SC22-G
XL
T
P
Y
X
FI
DUE2
G2
G1
TA
TB
P
XL
X
Y2
Y1
7.1.2 SC22-M
XL
T
P
Y
X
FI
DUE2
D1
DUE1
X1
MP
DUE3
G1
G2
TA
TB
P
XL
X
Y2
Y1
7.1.3 SC22-M (EUM)
G2
MP
X1
DUE1
D1
370bar
DUE2
FI Y1
Y2
X
XL
P
TB
TA
Y
P
T
XL
E U M
D3
X5
MTMXL
1
3
VDC
GND
XL PYX1X2
7.1.4 SC22-K … 0
MP
XL
T
P
Y
X
TA
36 bar
D2
TB
P
XL
X
Y2
Y1
DUE0
45 bar
FI
V1
X4
X5
DUE2
350 bar
D3
D1
DUE1
G2
X1
DUE3
X6
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7.1.5 SC22-K … 1
MP
XL
T
P
Y
X
TA
35 bar
D2
TB
P
XL
X
Y2
Y1
DUE0
45 bar
FI
V1
X4
X5
DUE2
350 bar
D3
D1
DUE1
G2
X1
DUE3
MT
G1
X6
V2
PXLT
7.1.6 SC22-V
XL
T
P
Y
X
FI
D1
G2
DUE5
DUE2
DUE1
G1
TA
TB
P
XL
X
Y2
Y1
7.2 End module without actuator section
7.2.1 SC22-E11-100
TE
PE
TA
TB
P
XL
X
Y2
Y1
XLE
7.2.2 SC22-E00-000
TA
TB
P
XL
X
Y2
Y1
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7.3 Actuator modules
7.3.1 Two actuator sections in one intermediate module
A1 B1
H8
DUE1
RV1 D1
A2 B2
H8
DUE2
RV2 D3
a
b
a
b
DUE7
DUE8
DUE9
DUE10
D2
Deckel/Cover ”B”
Deckel/Cover ”A”
WV1
WV2
DUE3
DUE4
DUE6
DUE5
DA1 DB1 DA2 DB2
TA
TB
P
XL
X
Y2
Y1
SC22 − _ − 1Y10... SC22 − _ − 2Y10...
D4
TA
TB
P
XL
X
Y2
Y1
7.3.2 One actuator section as intermediate module or end module
A
B
DUE1
RV
D1
TA
P
TB
XL
X
Y2
Y1
a
b
DUE7 DUE8
D2
Deckel/
Cover ”A”
Deckel/
Cover ”A”
Deckel/
Cover ”B”
Deckel/
Cover ”B”
WV
DUE3
DUE4
A B
DUE1
RV
D1
a
b
DUE7
DUE8
D2
WV
DUE3
DUE4
TA
P
TB
XL
X
Y2
Y1
TA
P
TB
XL
X
Y2
Y1
SC22−_−0Y00…
SC22−_−0D00…
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7.4 Spool type / Symbol
5/3 way functions Description for ordering code
A B
TA P TB
A
A B
TA P TB
B
A B
TA P TB
C
A B
TA P TB
D
8 Fluid
The oil for SC22 products must have a minimum cleanliness
level of 20/18/15 to ISO 4406 or class 9 to NAS 1638.
We recommend the use of fluids that contain anti-wear addi
tives for operation with boundary lubrication. Fluids without
appropriate additives reduce the service life of pumps and
motors. The user is responsible for maintaining, and reg
ularly checking, the fluid quality. Bucher Hydraulics recom
mends a Brugger EN/DIN 51347 load capacity >
30 N/mm
2
.
This is particularly important in applications with variable-
speed drives and speeds < 1000 rpm.
9 Note
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 pumps, please consult Bucher Hy
draulics.
10 Fluid cleanliness
Cleanliness class (RK) onto ISO 4406 and NAS 1638
Code
ISO 4406
Dirt particle number / 100 ml
4 m 6 m 14 m
NAS 1638
23/21/18 8000000 2000000 250000 12
22/20/18 4000000 1000000 250000 -
22/20/17 4000000 1000000 130000 11
22/20/16 4000000 1000000 64000 -
21/19/16 2000000 500000 64000 10
20/18/15 1000000 250000 32000 9
19/17/14 500000 130000 16000 8
18/16/13 250000 64000 8000 7
17/15/12 130000 32000 4000 6
16/14/12 64000 16000 4000 -
16/14/11 64000 16000 2000 5
15/13/10 32000 8000 1000 4
E 2015 by Bucher Hydraulics Remscheid GmbH, D-42864 Remscheid
www.bucherhydraulics.cominfo.kl@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: 430.300.
