TECHNICAL CATALOGUE
SD_EN_2026_01
SD*
SECTIONAL
DIRECTIONAL VALVE
SDL 280 bar 40 l/min
SDM 320 bar 50 l/min
SDS 320 bar 60 l/min
SDSE 320 bar 26 l/min
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Technical Data
2
SD_EN_2026_01
INTRODUCTION FLUIDS
SDL, SDM and SDS are sectional directional control valves.
They can be assembled in parallel with up to 10 working
sections. The same components allow creating series circuits
by inserting plugs in order to modify the oil path.
Working elements are available in two thicknesses with
working ports 3/8” BSP, 1/2” BSP, SAE-06 or SAE-08 threads.
Specific components for series circuits are available upon
request.
Working sections .....................................................page 2
Inlet and outlet elements .......................................page 17
Special elements....................................................page 27
Use mineral oil-based hydraulic fluids HL or HM type,
according to ISO 6743-4. For these fluids, use NBR seals.
For fluids HFDR type (phosphate esters) use FPM seals (code
V). For other fluid types, such as HFA, HFB, or HFC, please
consult our technical department.
Operation with fluids at temperatures above 80°C (180°F) may
cause accelerated seal degradation, as well as deterioration of
the physical and chemical properties of the fluid.
Temperatures above 55°C (130°F) are not recommended for
safety reasons,
SDL OPERATING PARAMETERS WORKING SECTION HYDRAULIC SYMBOLS
RANGE
TEMPERATURES:
ambient -20 to +60 °C - 4 to +140 °F
fluid -20 to +82 °C - 4 to +180 °F
FLUID VISCOSITY
range 10 - 400 cSt 60 -1900 SUS
recommended 25 cSt 120 SUS
FLUID
CONTAMINATION
ISO 4406:1999
class 18/16/13
MAXIMUM
OPERATING
PRESSURE
P - A - B ports 280 bar 4000 psi
T and T1 ports 280 bar 4000 psi
FLOW CAPACITY
parallel 40 l/min 10.6 gpm
series 40 l/min 10.6 gpm
SDM OPERATING PARAMETERS
MAXIMUM
OPERATING
PRESSURE
P - A - B ports 320 bar 4600 psi
T and T1 ports 250 bar 3600 psi
FLOW CAPACITY
parallel 50 l/min 13.2 gpm
series 40 l/min 10.6 gpm
SDS OPERATING PARAMETERS
MAXIMUM
OPERATING
PRESSURE
P - A - B ports 320 bar 4600 psi
T and T1 ports 250 bar 3600 psi
FLOW CAPACITY
parallel 60 l/min 15.9 gpm
series 50 l/min 13.2 gpm
SDSE OPERATING PARAMETERS
MAXIMUM
OPERATING
PRESSURE
P - A - B ports 320 bar 4600 psi
T and T1 ports 250 bar 3600 psi
FLOW CAPACITY 26 l/min 15.9 gpm
SD*
SDS.../LS
SDSE
SDSE.../LS
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Model Number - On/Off Working Sections
3
SD_EN_2026_01
SPOOL
see table at page 5
MAX FLOW RATE
L 40 l/min
M 50 l/min
S 60 l/min
PORTS SIZE
B15 3/8” BSPP
S15 9/16 - 18 UNF
B2
1/2” BSPP
(SDS only)
S2
3/4”-16 UNF
(SDS only)
SD -
-
-
design mark
- N -1
Working sections with Load Sensing feature require the proper inlet section SDX-QPLS.
CODE EXAMPLES:
SDL - B15D1 - D12K7 - NB - N - 1
SDM - S15D4 - D12K7 - NL - 1
SDS - B2D4 - D12K7 - NL - LS - 1
SEAL
N NBR
V Viton
LOAD SENSING
LS with load sensing (SDS only)
N without load sensing
SDL
K1 K2 WK7
D12 ■ ■ ■
D24 ■ ■ ■
D28 ■ - -
D48 ■ - -
SDM
K1 K2 K7
■ ■ ■
■ ■ ■
- - -
- - -
SDS
K1 K2 K7 | WK1 WK7 WK7D
■
□
■ ■ ■ ■
■
□
■ ■ ■ ■
■ - - - - -
■ - - - - -
COILS AVAILABILITY
■ available
□ upon request
VOLTAGE
D12 12 V DC solenoid
D24 24 V DC solenoid
D28 28 V DC solenoid
D48 48 V DC solenoid
D00 without coil
COIL
see availability table below
K1 EN 175301-803
K7 DT04-2P ‘Deutsch’
WK1
EN 175301-803
zinc-nickel plated
WK7
DT04-2P ‘Deutsch’
zinc-nickel plated
WK7D
DT04-2P ‘Deutsch’
zinc-nickel plated
with diode
K2 AMP Junior
FUNCTION
D
$%
37
E
D
DE
double solenoid
3 positions - spring centred
A
$%
37
D
D
single solenoid at side A
2 positions - spring return
B
$%
37
E
E
single solenoid at side B
2 positions - spring return
TA
$%
37
D
DE
single solenoid at side A
2 positions - spring return
TB
$%
37
E
ED
single solenoid at side B
2 positions - spring return
ON-OFF WORKING SECTIONS
MANUAL OVERRIDE
M
pin, integrated in the tube,
standard for SDM and SDS
(not available for SDL and
SDS with coils type WK*)
B
pin, integrated in the tube,
boot protected (standard
for SDL and SDS with coils
type WK*)
L hand lever
K knob, turning
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Model Number - On/Off Working Sections
4
SD_EN_2026_01
FUNCTION D FUNCTION A FUNCTION B
FUNCTION TA FUNCTION TB
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Model Number - Proportional Working Sections
5
SD_EN_2026_01
SDSE- -
-
-
design mark
-
Working sections with Load Sensing feature need the proper inlet section SDX-QPLS.
On-off and proportional working sections can be combined in a single assembly.
CODE EXAMPLES:
SDSE - B15-D26C - D12K7 - NM - LS - 1
SDSE - B2-D26C - D12WK7 - NL - N- 1
SEAL
N NBR
V Viton
VOLTAGE
D12 12 V DC solenoid
D24 24 V DC solenoid
D00 without coil
PROPORTIONAL WORKING SECTION
FUNCTION
D
double solenoid
spring centred
A
single solenoid at side A
spring return
B
single solenoid at side B
spring return
COIL
K1 EN 175301-803
K7 DT04-2P ‘Deutsch’
WK1
EN 175301-803
zinc-nickel plated
WK7
DT04-2P ‘Deutsch’
zinc-nickel plated
MANUAL OVERRIDE
M
pin, integrated in the
tube. (standard)
B
pin, integrated in the
tube, boot protected
(standard with WK*
coils)
K knob, turning
L hand lever
PORTS SIZE
B15 3/8” BSPP
S15 9/16 - 18 UNF
B2 1/2” BSPP
S2 3/4”-16 UNF
MAX FLOW RATE
S 40 l/min
NOMINAL FLOW
with Δp P-T 10 bar (145 psi)
08 8 l/min (2.1 gpm)
16 16 l/min (4.2 gpm)
16-08 16/08 l/min asymmetric
26 26 l/min (7.0 gpm)
26-13 26/13 l/min asymmetric
SPOOLS
C
closed centre
A
open centre
- 1
LOAD SENSING
LS with load sensing
N without load sensing
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Characteristic Curves
6
SD_EN_2026_01
SDL PRESSURE DROPS Δp-Q
SDM PRESSURE DROPS Δp-Q
SDS PRESSURE DROPS Δp-Q
SPOOL TYPE
CURVE
P→A P→B A→T B→T P→T
D1, A1, B1 1 1 3 3 -
D2, A2, B2 2 2 1 1 2
D3, A3, B3 3 3 2 2 -
D4, A4, B4 4 4 4 4 1
TA1, TB1 3 3 3 3 -
TA2, TB2
TYPE
CURVE
P→A P→B A→T B→T P→T
D1, A1, B1 1 1 1 1 -
D2, A2, B2 2 2 2 2 2
D3, A3, B3 1 1 2 2 -
D4, A4, B4 4 4 4 4 1
TA1, TB1 2 2 2 2 -
TA2, TB2 1 1 1 1 -
TYPE
CURVE
P→A P→B A→T B→T P→T
D1, A1, B1 1 1 1 1 -
D2, A2, B2 2 2 2 2 2
D3, A3, B3 1 1 2 2 -
D4, A4, B4 4 4 4 4 1
TA1, TB1 1 1 1 1 -
TA2, TB2 1 1 1 1 -
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Characteristic Curves
7
SD_EN_2026_01
SDL PERFORMANCE CURVES
SDM PERFORMANCE CURVES
SDS PERFORMANCE CURVES
The curves define the operating flow rate ranges based on valve pressure.
The values were obtained according to ISO 6403 standards, with solenoids at rated temperature and supplied with 90% of the nominal
voltage. Values are obtained with mineral oil (viscosity 36 cSt, temperature 50 °C) and filtration in accordance with ISO 4406:1999,
class 18/16/13.
D1, A1, B1 1
D2, A2, B2 2
D3, A3, B3 3
D4, A4, B4 4
D4, A4, B4 reverse flow 4*
TA1, TB1 4
TA2, TB2 1
D1, A1, B1 1
D2, A2, B2 2
D3, A3, B3 3
D4, A4, B4 4
D4, A4, B4 reverse flow 4*
TA1, TB1 2
TA2, TB2 1
D1, A1, B1 1
D2, A2, B2 1
D3, A3, B3 2
D4, A4, B4 1
D4, A4, B4 reverse flow 1*
TA1, TB1 1
TA2, TB2 1
NOTE: The reverse flow condition occurs in series
circuits made with elements designed for parallel
connection and plugs, and only in even-position
elements. See the hydraulic diagram on page 32.
SECTIONAL DIRECTIONAL CONTROL VALVE
S D S E - Working Sections: Characteristic Curves
8
SD_EN_2026_01
08C / 08A
16C / 16A
26C / 26A
Flow characteristic curves obtained with 24 V DC valve.
The Δp values are measured between P and T (full loop) valve
ports.
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Electrical Data
9
SD_EN_2026_01
The solenoid consists of a tube and a coil. The coil is mounted
onto the tube and secured with a retaining ring.
The WK7D coil includes a suppression diode to protect against
voltage peaks. During switching, the diode significantly
reduces the energy released by the winding, limiting the
voltage to 31.4 V for the D12 coil and 58.9 V for the D24 coil.
Contact us to order coils as spare parts.
DUTY CYCLE 100%
ELECTROMAGNETIC
COMPATIBILITY (EMC)
according to
European directive
2014/30/EU
PROTECTION
CLASS FOR
INSULATION
copper wire class H (180 °C)
coil class F (155 °C)
Absorbed
power
[W]
Resistance
at 20 °C
[Ω]
Current
at 20 °C.
[A]
SDL WORKING SECTION
D12 26.5 5.4 2.2
D24 27.8 20.7 1.16
D28 28.5 27.5 1.02
D48 28 82 0.58
SDS WORKING SECTION
D12 32.7 4.4 2.72
D24 31 18.6 1.29
D28 31 26 1.11
D48 29.5 78.6 0.61
SDSE WORKING SECTION
D12 12 4.4 1.88
D24 24 18.6 0.86
SDM WORKING SECTION
D12 28.9 4.98 2.41
D24 28 21 1.15
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Electrical Connections and IP Rating
10
SD_EN_2026_01
DEUTSCH DT04 MALE
IP degree of electrical connection: IP65/IP68/IP69
IP degree of whole valve: IP65/IP68/IP69
IP degree according to ISO 20653: IP69K
DEUTSCH DT04 MALE
IP degree of electrical connection: IP65
IP degree of whole valve: IP65
SDM - K2
EN 175301-803 (ex DIN 43650)
Requires mating connectors EN 175301-803 type A
IP degree of electrical connection: IP65
IP degree of whole valve: IP 65
AMP Junior
IP degree of electrical connection: IP65
IP degree of whole valve: IP65
The declared IP ratings comply with EMC Directive 2014/30/EU and apply only if valve and connectors with matching IP ratings are cor-
rectly installed. Connectors are not included with solenoid valves but are always supplied with proportional valves.
WK1, WK7, and WK7D coils offer improved IP ratings over standard metal coils, thanks to zinc-nickel plating and specific design features.
SDL - K1
ELECTRICAL CONNECTIONS AND IP RATING
SDL - K2
EN 175301-803 (ex DIN 43650)
Requires mating connectors EN 175301-803 type A
IP degree of electrical connection: IP66
IP degree of whole valve: IP 66
AMP Junior
IP degree of electrical connection: IP65/IP67
IP degree of whole valve: IP65/IP67
SDL - K7
SDM - K7
SDM - K1
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Electrical Connections and IP Rating
11
SD_EN_2026_01
SDS / SDSE - K1
SDS - K2
EN 175301-803 (ex DIN 43650)
Mating connectors EN 175301-803 type A
IP degree of electrical connection: IP65
IP degree of whole valve: IP 65
EN 175301-803 (ex DIN 43650)
Zinc-nickel plated coil.
IP degree of electrical connection: IP66
IP degree of whole valve: IP66
The pin for manual override is boot-protected (code B).
SDS / SDSE - WK1
DEUTSCH DT04 MALE
Zinc-nickel plated coil.
The WK7D coil includes a suppression diode to protect against
voltage peaks. More details on page 10.
IP degree of electrical connection: IP66/IP68/IP69
IP degree of whole valve: IP66/IP68/IP69
IP degree according to ISO 20653: IP69K
The pin for manual override is boot-protected (code B).
DEUTSCH DT04 MALE
IP degree of electrical connection: IP65/IP67
IP degree of whole valve: IP 65
SDS / SDSE - WK7 SDS ONLY - WK7D SDS / SDSE - K7
AMP Junior
Upon request only.
IP degree of electrical connection: IP65/IP67
IP degree of whole valve: IP 65
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Installation Data
12
SD_EN_2026_01
SECTIONAL MOUNTING INTERFACES
MOUNTING INTERFACE - WORKING PORTS
dimensions in mm [in]
SDS and SDSE
with mounting surface
for flanged module
available ports:
B15 or S15
SDS and SDSE
available ports:
B2 or S2
SDL and SDM
available ports:
B15 or S15
seals:
no. 2 O-Ring
type 2043 (10.82x1.78)
seals:
no. 3 O-rings
type 2021
(5.28x1.78)
ensure the mating surface
for these two O-rings is blind
and flat to prevent leakage
STANDARD
(Code N)
LOAD SENSING PORT
(Code LS)
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Installation Data
13
SD_EN_2026_01
SDM (K7 COIL)
SDL (K7 COIL)
dimensions in mm [in]
side with
sealing rings
Ports:
A, B = 3/8” BSPP or 9/16 - 18 UNF
Ports:
A, B = 3/8” BSPP or 9/16 - 18 UNF
coil removal
space
boot manual override
integrated in the
retainer (code B)
retainer
tightening torque:
3 ÷ 3.4 Nm
manual override by pin
in the tube (code M)
side with
sealing rings
coil removal
space
retainer
tightening torque:
5 Nm
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Installation Data
14
SD_EN_2026_01
Ports:
A, B = 3/8” BSPP or 9/16 - 18 UNF
Ports:
A, B = 1/2” BSPP or 3/4 - 16 UNF
manual override by pin
in the tube (code M)
side with
sealing rings
coil removal
space
side with
sealing rings
SDS / SDSE (K7 COIL)
dimensions in mm [in]
ring retainer
tightening torque:
5 ± 0.5 Nm
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Manual Overrides
15
SD_EN_2026_01
OVERRIDE PIN INTEGRATED THE TUBE, BOOT PROTECTED: Code B
KNOB, TURNING: Code K
The SDL standard element is already equipped with boot protection for the solenoid tube.
dimensions in mm [in]
SDL SDM SDS
SDL SDM SDS
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Working Sections: Manual Overrides
16
SD_EN_2026_01
HAND LEVER: Code L
Devices are mounted on side A. For different configurations, please contact our technical department. Refer to the overall drawings on
the previous pages for any dimensions not specified here.
The CHL lever device can operate with a maximum pressure of 50 bar in line T and is therefore not suitable for series circuits.
SDL
SDM
SDS
dimensions in mm [in]
INLET SECTIONS: PRESSURE CONTROL WITH UNLOADING VALVE
- -2
design mark
FUNCTION
P
pressure
control
SDX - P - B2S -
VOLTAGE
D12 12 V DC solenoid
D24 24 V DC solenoid
D28 28 V DC solenoid
COIL
K1 EN 175301-803
K7 DT04-2P ‘Deutsch’
K2 AMP Junior (*)
MANUAL OVERRIDE
S screw
P push
PORTS SIZE
B2 1/2” BSPP
*K2 coil upon request
INLET SECTIONS: BASIC
INLET SECTIONS: PRESSURE CONTROL
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Model Number
17
SD_EN_2026_01
- 1
design mark
SDX - B2 S -
- 1
design mark
RELIEF VALVE
140 up to 140 bar
210 up to 210 bar
320 up to 320 bar
SDX - P - B2S -
PORTS SIZE
B2 1/2” BSPP
FUNCTION
P
pressure
control
PORTS SIZE
B2 1/2” BSPP
S2 3/4”-16 UNF
MATERIAL
S steel (zinc-plated)
MATERIAL
S steel (zinc-plated)
RELIEF VALVE
140 up to 140 bar
210 up to 210 bar
320 up to 320 bar
SEAL
N NBR (standard)
V Viton
SEAL
N NBR (standard)
V Viton
MATERIAL
S steel (zinc-plated)
SEAL
N NBR (standard)
V Viton
Inlet section designed for stacked valve assemblies supplied by fixed-displacement pumps.
It features a pressure relief valve and a compensator set at approximately 11 bar, ensuring stable upstream pressure. This provides a
constant flow to the working port currently under the highest pressure.
When a working port is idle (in neutral), the compensator diverts the flow to tank, optimising efficiency and minimising losses. Versions
with the unloading valve allow further pressure reduction when the valve assembly is idle.
These inlet sections are intended for use with sectional valves of types SDS-LS-1 and SLSE-LS-1.
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Model Number
18
SD_EN_2026_01
INLET SECTION: FLOW AND PRESSURE CONTROL, WITH OR WITHOUT UNLOADING VALVE
FUNCTION
QP
flow and
pressure
control
SEAL
N NBR (standard)
V Viton
- -1
design mark
RELIEF VALVE
140 up to 140 bar
210 up to 210 bar
320 up to 320 bar
SDX - QP - B15S -
PORTS SIZE
B15 3/8” BSPP
VOLTAGE
D12 12 V DC solenoid
D24 24 V DC solenoid
D28 28 V DC solenoid
MANUAL OVERRIDE
K2 knob, twist and lock
P push
UNLOADING
(omit if not required)
COIL
K1 EN 175301-803
K7 DT04-2P ‘Deutsch’
K2 AMP Junior (*)
COIL
K1 EN 175301-803
K7 DT04-2P ‘Deutsch’
K2 AMP Junior (*)
*K2 coil upon request
INLET SECTION FOR VALVES WITH LS PORT: FLOW AND PRESSURE CONTROL, WITH OR WITHOUT UNLOADING VALVE
FUNCTION
QPLS
flow and
pressure
control
- -1
RELIEF VALVE
135 up to 140 bar
220 up to 220 bar
SDX - QPLS - B2A -
*K2 coil upon request
VOLTAGE
D12 12 V DC solenoid
D24 24 V DC solenoid
D00 without coil
MANUAL OVERRIDE
P push
MATERIAL
A aluminium
design mark
SEAL
N NBR (standard)
V Viton
UNLOADING
(omit if not required)
Aluminium
p max = 230 bar
Q max = 40 l/min
PORTS SIZE
B2 1/2” BSPP
S2 3/4”-16 UNF
MATERIAL
S steel (zinc-plated)
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Model Number / Electrical Data
19
SD_EN_2026_01
UNLOADING VALVE FOR SDX-QP INLET
(see page 24)
D12 20.5 7 1.2
D24 20.5 28 0.6
UNLOADING VALVE FOR SDX-QPLS INLET
(see page 25)
D12 18 8 1.5
D24 18 3.2 0.75
OUTLET SECTIONS
ELECTRICAL DATA FOR INLET AND OUTLET SECTIONS
OUTLET PORT
00 blind section (*)
01 line P
02 line T
03 both line P and T
SDX- - S - 1
design mark
* section not suitable
for series configuration
Below are the electrical specifications of the unloading valves installed in the inlet sections. The type of unloading valve varies depending
on the inlet section type.
For spare parts, please contact our Sales Department.
DUTY CYCLE 100%
ELECTROMAGNETIC
COMPATIBILITY (EMC)
according to
European directive
2014/30/EU
PROTECTION
CLASS FOR
INSULATION
copper wire class H (180 °C)
coil class F (155 °C)
Absorbed
power
[W]
Resistance
at 20 °C
[Ω]
Current
at 20 °C.
[A]
UNLOADING VALVE FOR SDX-P INLET
(see page 23)
D12 20 7.2 1.67
D24 20 28.8 0.83
MATERIAL
S steel (zinc-plated)
PORTS SIZE
(omit for 00 blind plate)
B15 3/8” BSPP
S15 9/16 - 18 UNF
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Installation Data
20
SD_EN_2026_01
BASIC INLET SDX-B2S-*-1
dimensions in mm [in]
mounting
surface with
sealing rings:
2 OR 2043
90 shore A
no. 2 M6x12
no. 3 M8x13
for tie rods
pressure
gauge port
1/4” BSP
Ports: P, T = 1/2” BSPP
NOTE: See page 12 for missing
mounting interface dimensions.
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Installation Data
21
SD_EN_2026_01
INLET WITH PRESSURE CONTROL VALVE SDX-P***-B2S-*-1
dimensions in mm [in]
mounting
surface with
sealing rings:
2 OR 2043
90 shore A
no. 2 M6x12
no. 3 M8x13
for tie rods
pressure
gauge port
1/4” BSP
locking nut:
spanner 13
socket hex
adjustment screw:
Allen key 4
clockwise rotation to
increase pressure
Ports: P, T = 1/2” BSPP
NOTE: See page 12 for missing
mounting interface dimensions.
NOTE: See page 12 for missing
mounting interface dimensions.
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Installation Data
22
SD_EN_2026_01
INLET WITH PRESSURE CONTROL VALVE AND UNLOADING SDX-P***-B2S-D**K7P-*-2
dimensions in mm [in]
mounting
surface with
sealing rings:
2 OR 2043
90 shore A
no. 2 M6x12
no. 3 M8x13
for tie rods
pressure
gauge port
1/4” BSP
unloading valve
here shown with
K7 connection
push manual over-
ride: look at the
model number for
further choices.
locking nut:
spanner 13
socket hex
adjustment screw:
Allen key 4
clockwise rotation to
increase pressure
Ports: P, T = 1/2” BSPP
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Installation Data
23
SD_EN_2026_01
INLET WITH PRESSURE CONTROL VALVE AND UNLOADING SDX-QP***-B15S-D**K7P-*-1
dimensions in mm [in]
mounting
surface with
sealing rings:
2 OR 2043
90 shore A
unloading valve
here shown with
K7 connection
push manual
override: look at
the model number
for further
choices.
socket hex
adjustment screw:
Allen key 4
clockwise rotation to
increase pressure
Ports: P, T = 3/8” BSPP
NOTE: See page 12 for missing
mounting interface dimensions.
NOTE: The same component
without the unloading valve is:
SDX-PQ***-B15S-*-1
pressure
gauge port
1/4” BSP
locking nut:
spanner 13
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Installation Data
24
SD_EN_2026_01
INLET SECTION FOR VALVES WITH LOAD SENSING PORT SDX-QPLS
dimensions in mm [in]
mounting
surface with
sealing rings:
2 OR 2043
1 OR 2021
90 shore A
no. 2 M6x12
no. 3 M8x13
for tie rods
pressure
gauge port
1/4” BSP
2
nd
pressure
gauge port
1/4” BSP
pressure
compensator
unloading valve
here shown with
K7 connection
Ports: P, T =1/2” BSPP or 3/4 - 16 UNF
NOTE: See page 12 for missing
mounting interface dimensions.
without unloading valve
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Installation Data
25
SD_EN_2026_01
OUTLET SECTION 00: BLIND
OUTLET SECTION 01: P PORT
OUTLET SECTION 02: T PORT
dimensions in mm [in]
Port: P1 = 3/8” BSPP
Port: T1 = 3/8” BSPP
no. 3 through holes
for stack assembly
tie-rods
NOTE: See page 12 for missing
mounting interface dimensions.
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Inlet and Outlet Elements: Installation Data
26
SD_EN_2026_01
OUTLET SECTION 03: BOTH P AND T PORTS
Ports: P1, T1 = 3/8” BSPP
dimensions in mm [in]
NOTE: See page 12 for missing
mounting interface dimensions.
SECTIONAL DIRECTIONAL CONTROL VALVE
S D S E - Special Elements
27
SD_EN_2026_01
SDSE- -
-
-
design mark
-
On-off and proportional working sections can be combined in a single assembly.
CODE EXAMPLE:
SDSE - S15 - D26A - A300B300 - D12WK7 - NM - 1
SEAL
N NBR
V Viton
VOLTAGE
D12 12 V DC solenoid
D24 24 V DC solenoid
D00 without coil
PROPORTIONAL WORKING SECTIONS WITH ANTI-SHOCK + ANTI-CAVITATION FEATURE
FUNCTION
D
double solenoid
spring centred
A
single solenoid at side A
spring return
B
single solenoid at side B
spring return
COIL
K1 EN 175301-803
K7 DT04-2P ‘Deutsch’
WK1
EN 175301-803
zinc-nickel plated
WK7
DT04-2P ‘Deutsch’
zinc-nickel plated
PORTS SIZE
B15 3/8” BSPP
S15 9/16 - 18 UNF
MAX FLOW RATE
S 40 l/min
NOMINAL FLOW
with Δp P-T 10 bar (145 psi)
08 8 l/min (2.1 gpm)
16 16 l/min (4.2 gpm)
16-08 16/08 l/min asymmetric
26 26 l/min (7.0 gpm)
26-13 26/13 l/min asymmetric
SPOOLS
C
closed centre
A
open centre
- N - 1
AUXILIARY VALVE
side A
A..
anti-cavitation +
antishock
AUXILIARY VALVE
side B
B..
anti-cavitation +
antishock
A.. and B.. add the desired set pressure value to the letter:
available pressures: 100, 150, 190, 235, 280, 300, 350.
These special working elements are equipped with anti-shock and anti-cavitation valves. These features protect the system from
pressure peaks and flow disruptions, enhancing reliability and smooth operation.
MANUAL OVERRIDE
M
pin, integrated in the
tube. (standard)
B
pin, integrated in the
tube, boot protected
(standard with WK*
coils)
K knob, turning
L hand lever
SECTIONAL DIRECTIONAL CONTROL VALVE
S D S E - Special Elements
28
SD_EN_2026_01
side with
sealing rings
coil removal
space
SDSE WITH ANTI-SHOCK + ANTI-CAVITATION FEATURE
dimensions in mm [in]
Ports:
A, B = 3/8” BSPP or 9/16 - 18 UNF
NOTE: See page 12 for missing
mounting interface dimensions.
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Special Elements
29
SD_EN_2026_01
FUNCTION
QLS Load sensing
- -1
RELIEF VALVE
140 up to 140 bar
210 up to 210 bar
320 up to 320 bar
SDX - QLS - B15 S -
VOLTAGE
D12 12 V DC solenoid
D24 24 V DC solenoid
MATERIAL
S
steel
(zinc-plated)
design mark
SEAL
N NBR (standard)
V Viton
INLET ELEMENT WITH PRESSURE-COMPENSATED PROPORTIONAL FLOW CONTROL
ELECTRICAL DATA
This inlet element allows supplying the active on/off working element in the assembly with a proportional, pressure-compensated flow,
and is also equipped with a pressure relief valve.
The SDX-QLS inlet section can be used in circuits with fixed-displacement pumps or with variable-displacement pumps, where the
compensation function is managed by the pump. In this case, the local compensator must be deactivated by tightening the knob.
The pressure signal is transmitted to the pump via the Ls port.
PORTS SIZE
B15 3/8” BSPP
S15 9/16 - 18 UNF
The proportional solenoid consists of a tube and a coil.
The coil is mounted on the tube and secured with a retaining
ring. The coil can be rotated to any position, allowing flexible
orientation of the electrical connector to suit installation
requirements.
For spare parts or replacements, please contact the Sales
Department.
DUTY CYCLE 100%
ELECTROMAGNETIC
COMPATIBILITY (EMC)
according to
European directive
2014/30/EU
PROTECTION
CLASS FOR
INSULATION
copper wire class H (180 °C)
coil class F (155 °C)
Absorbed
power
[W]
Resistance
at 20 °C
[Ω]
Nominal
current
[A]
COMPENSATOR COIL
D12 12 4.4 1.88
D24 24 18.6 0.86
COIL
K1 EN 175301-803
K7 DT04-2P ‘Deutsch’
WK1
EN 175301-803
zinc-nickel plated
WK7
DT04-2P ‘Deutsch’
zinc-nickel plated
SECTIONAL DIRECTIONAL CONTROL VALVE
S D X - Special Elements
30
SD_EN_2026_01
DIMENSIONS
mounting
surface with
sealing rings:
2 OR 2043
90 shore A
The compensation function is
disabled by tightening the knob.
LS port 1/4” BSP
socket hex
adjustment screw:
Allen key 4
clockwise rotation
to increase pressure
Ports: P, T = 3/8” BSPP
pressure
gauge port
1/4” BSP
locking nut:
spanner 13
dimensions in mm [in]
NOTE: See page 12 for missing
mounting interface dimensions.
SECTIONAL DIRECTIONAL CONTROL VALVE
S D - Technical Data
31
SD_EN_2026_01
INSTALLATION
The stacked valve assembly can be installed in any position
without impairing proper functioning.
Ensure that there is no air in the hydraulic circuit.
Assembly kits are available and can be ordered using the
codes provided in the tables below.
For special assemblies, please contact the technical
department to verify dimensions before placing an order.
stud
washer
M8 locking nut
Valve
type
Sectional
valves
Code
SDL-B15
SDL-S15
SDM-B15
SDM-S15
3 3404100100
4 3404100101
5 3404100102
6 3404100103
7 3404100104
8 3404100105
9 3404100106
SDS-B15
SDS-S15
SDS-B2
SDS-S2
3 3404100108
4 3404100109
5 3404100110
6 3404100111
Tightening torque: 20 (0...+3) Nm
ASSEMBLY KIT
The assembly kit includes:
no. 3 studs,
no. 3 self locking nuts
no. 3 washers
All parts are zinc-coated.
Please use these codes to order the kit:
SECTIONAL DIRECTIONAL CONTROL VALVE
S D - Circuit Examples
32
SD_EN_2026_01
inlet
section
D1
spool
D1
spool
outlet
section
SDX-00
Series circuits are created using sectional valves with D4
spools by inserting plugs between the elements.
The oil flow is diverted alternately from the P line to the T line.
Please note that this type of configuration requires a different
outlet section depending on whether the assembly contains an
even or odd number of sectional directional valves.
plug Ø9 - ordering code: 0612253
plugs
inlet
section
D4
spool
D4
spool
outlet
section
SDX-01
inlet
section
D4
spool
D4
spool
D4
spool
outlet
section
SDX-02
plugs
CIRCUIT EXAMPLE: PARALLEL CIRCUIT
CIRCUIT EXAMPLES : SERIES CIRCUITS
SECTIONAL DIRECTIONAL CONTROL VALVE
S D * - Model number - Assembled valve
33
SD_EN_2026_01
VOLTAGE
D12 12 V DC solenoid
D24 24 V DC solenoid
D28 28 V DC solenoid
D48 48 V DC solenoid
D00 without coil
SLICES
No. of directional
valves
MAX FLOW RATE
L 40 l/min
M 50 l/min
S 60 l/min
PORTS SIZE
B15 3/8” BSPP
S15 9/16 - 18 UNF
B2
1/2” BSPP
(SDS only)
S2
3/4”-16 UNF
(SDS only)
CIRCUIT TYPE
P parallel
S
series,
by plugs
SD -
-
-
- H
project code (5 digits)
assigned by Hydreco
CODE EXAMPLE:
SDL-P4B15-D12K7-N-H20520
COIL
see availability table below
K1 EN 175301-803
K7 DT04-2P ‘Deutsch’
WK1
EN 175301-803
zinc-nickel plated
WK7
DT04-2P ‘Deutsch’
zinc-nickel plated
WK7D
DT04-2P ‘Deutsch’
zinc-nickel plated
with diode
K2
AMP Junior
(upon request)
SEAL
N NBR
V Viton
ASSEMBLED VALVE
AUSTRALIA
AUSTRALIA
INDIA
HydrecoHydraulics Pty Ltd, Regents Park (NSW)
HydrecoHydraulics Pty Ltd,Welshpool(WA)
HydrecoHydraulicsIndia Private Ltd, Bangalore
+61 2 9838 6800
+618 9377 2211
+91 80 645 36200
sales-au@hydreco.com
reception-wa@hydreco.com
sales-in@hydreco.com
APAC
EMEA
GERMANY
ITALY
ITALY
ITALY
NORWAY
UK
Hydreco Hydraulics GmbH, Helmstedt (NI)
Hydreco HydraulicsItalia Srl, Vignola (MO)
Hydreco Hydraulics Italia Srl, Parma (PR)
Hydreco Srl, San Cesario S/P (MO)
Hydreco HydraulicsNorway AS, Nittedal
Hydreco HydraulicsLtd, Poole, Dorset
+49 5351 55860
+39 059 770 0411
+39 0521 183 0520
+39 059 330 091
+47 22 90 94 10
+44 (0) 1202 627500
info@hydreco.de
sales-it@hydreco.com
sales-it@hydreco.com
cylinders@hydreco.com
post-no@hydreco.com
info-uk@hydreco.com
AMERICAS
NORTH/LATIN
HydrecoInc / Continental Hydraulics Inc, Shakopee (MN)
+1952 895 6400 sales@conthyd.com
Supported by a world w i d e network
CONTACT INFORMATION
hydreco-hydraulics
www.h y d r eco.com