COMPACT CATALOG

SECTIONAL
DIRECTIONAL CONTROL VALVES
SD25
Features
Simple, compact and heavy duty designed sectional valve from 1 to 12 sections for open and closed center hydraulic systems.
H Fitted with a main pressure relief valve and a load check valve on every working section
H Available with parallel or series circuit.
H Optional power beyond port.
H A wide variety of service ports and circuit valves.
H Available manual, pneumatic, hydraulic, electro--hydraulic, and remote with flexible cables spool control kits.
H Diameter 25 mm (0.98 in) interchangeable spools.

Working conditions
This catalog shows technical specifications and diagrams measured with mineral oil of 46 mm2/s -- 46 cSt viscosity at 40°C -- 104°F
temperature.

Nominal flow rating 240 l/min 63 US gpm

Operating pressure (maximum) parallel circuit 315 bar 4600 psi
series circuit 210 bar 3050 psi
Back pressure (maximum) on outlet port T 25 bar 360 psi
Dp=100 bar -- 1450 psi
Internal leakage A(B)®T 4 cm3/min 0.24 in 3/min
fluid and valve at 40°C -- 104°F
Fluid Mineral base oil
Fluid temperature range with NBR (BUNA--N) seals from --20° to 80°C from --4° to 176°F
with FPM (VITON) seals from --20° to 100°C from --4° to 212°F
Viscosity operating range from 15 to 75 mm2/s from 15 to 75 cSt
min. 12 mm2/s 12 cSt
max. 400 mm2/s 400 cSt
Max level of contamination 19/16 -- ISO 4406 NAS 1638 -- class10
Ambient temperature range from --40° to 60°C from --40° to 140°F

NOTE -- For different conditions please contact Customer Service.

Additional information
This catalog shows the product in the most standard configurations.
Please contact Customer Service Dpt. for more detailed information or
special request.

WARNING!
All specifications of this catalog refer to the standard product at this date.
Walvoil, oriented to a continuous improvement, reserves the right to
discontinue, modify or revise the specifications, without notice.

WALVOIL IS NOT RESPONSIBLE FOR ANY DAMAGE CAUSED BY AN 3rd edition December 2000:
INCORRECT USE OF THE PRODUCT. This edition supersedes all prior documents.

2 DBC005A
 SD25
Dimensional data (parallel circuit)

WALVOIL Production batch :

Optional top outlet (must be used in Valve type P0000001 P00 = production year (2000)
power beyond configuration) 117211009 00001 = progressive number
MADE IN ITALY
E
36.5 F 135
1.44 5.31
81 81
48
3.19 3.19
1.89
61
2.4

Power beyond
“C” optional

MADE IN ITALY
117211009
P0000001
WALVOIL
M10
14.02

9.33
237
8.58
218

4.09
356

104

5.31
135
67.5
2.66
2.24
57

41.5
1.63

Position 1
1.77
45

3.03

19°
77

0
M12 19°

21 21 18 137 Position 2
0.83 0.83 0.71 5.39
71 62 62 71
2.79 2.44 2.44 2.79

E F Weight E F Weight
TYPE TYPE
mm in mm in kg lb mm in mm in kg lb
SD25/1 235 9.25 162 6.38 37.6 83 SD25/7 607 23.9 534 21.02 103.6 228.2

SD25/2 297 11.69 224 8.82 48.6 107 SD25/8 669 26.34 596 23.46 114.6 252.4

SD25/3 359 14.13 286 11.26 59.6 131.4 SD25/9 731 28.78 658 25.9 125.6 276.6

SD25/4 421 16.57 348 13.7 70.6 155.6 SD25/10 793 31.22 720 28.34 136.6 300.8

SD25/5 483 19.02 410 16.14 81.6 180 SD25/11 855 33.66 782 30.78 147.6 325

SD25/6 545 21.46 472 18.58 92.6 204 SD25/12 917 36.1 844 33.22 158.6 349.2

Standard threads
BSP UN--UNF
PORTS
(ISO 228/1) (ISO 11926--1)

Inlet P G1 1 5/8--12 UN--2B (SAE 20)

A and B ports G1 1 5/16--12 UN--2B (SAE 16)
Outlet T and power--beyond C G 1 1/4 1 5/8--12 UN--2B (SAE 20)
PILOT PORTS
Hydraulic G 1/4 9/16--18 UNF--2B (SAE 6)
Pneumatic NPTF 1/8--27 NPTF 1/8--27

DBC005A 3
SD25
Performance data (pressure drop vs. flow)

Open center
From side inlet to side outlet.
15 30 45 60 (US gpm)
40
(bar) 540
(psi)

A1 A12 30
12 sections

Pressure drop
360
8 sections
P T 20
4 sections
1 section 180
B1 B12 10

0
0 90 180 270
Flow (l/min)

Inlet to work port

From side inlet to A port (spool in position 1) or B port (spool in position 2).
15 30 45 60 (US gpm)
40
(bar) 540
(psi)
A1 A12 30
Pressure drop

P®A12(B12) 360

P T 20
P®A1(B1)
180
B1 B12 10

0
0 90 180 270
Flow (l/min)

Work port to outlet

From A port (spool in position 2) or B port (spool in position 1) to side outlet.
15 30 45 60 (US gpm)
40
(bar) 540
(psi)
A1 A12 30
Pressure drop

360
A1(B1)®T
P T 20
A12(B12)®T
180
B1 B12 10

0
0 90 180 270
Flow (l/min)

NOTE -- Measured with spool type 1.

4 DBC005A
 SD25
Hydraulic circuit

2 parallel working sections

A1 B1 A2 B2

P
T

125
1800

Ex.: SD25/2/AC(XG--125)/18L/18L/RC

Intermediate pressure compensated flow divider section

A1 B1 A2 B2

P
T

125
1800

Ex.: SD25/2/AC(XG--125)/18L/DFG/18L/RC

2 inlet cover and mid return manifold section

A1 B1 B1 A1

P P

125 125
1800 1800

T
Ex.: SD25/2/AC(XG--125)/18L/CS1/18L/BC(XG--125)

DBC005A 5
SD25
Hydraulic circuit

Inlet cover

TYPE CODE DESCRIPTION

AC(YG3) 617205007 Side inlet with direct pressure relief valve
AD(YG3) 617205005 Top inlet with direct pressure relief valve
AC(XG) 617205009 Side inlet with pilot operated pressure relief
valve
AC(SV) 617205006 Side inlet with relief valve blanking plug

P P P

125 125 125

1800 1800 1800

AC(YG3--125) AD(YG3--125) AC(XG--125) AC(SV)

Working sections

TYPE CODE DESCRIPTION

P-- 18L 617105001 Parallel
S-- 18L 617115001 Series

A B A B

P--18L S--18L

6 DBC005A
 SD25
Hydraulic circuit

Intermediate sections

TYPE CODE DESCRIPTION

CS1 617405010 Mid return manifold section
DFG 617411020 Pressure compensated flow divider section
EI1(XG) 617425010 Secondary pilot operated pressure relief
valve
EI2(XG) 617425020 Mid inlet with secondary pilot operated
pressure relief valve

125 125
1800 1800

CS1 T DFG EI1(XG--125) EI2(XG--125)

Outlet cover

TYPE CODE DESCRIPTION

RC 617305002 Side outlet
RD 617305001 Top outlet
RE 617305007 Top outlet with power beyond
RK 617305112 Top outlet with closed center

T T T

C
T

RC RD RE RK

NOTE -- Codes are referred to UN- UNF thread.

DBC005A 7
SD25
Assembling parts

PART CODE DESCRIPTION

1. 5TIR112234 Tie rod kit for 1 section valve
5TIR112296 Tie rod kit for 2 sections valve
5TIR112358 Tie rod kit for 3 sections valve
5TIR112420 Tie rod kit for 4 sections valve
5TIR112482 Tie rod kit for 5 sections valve
5TIR112544 Tie rod kit for 6 sections valve
5TIR112606 Tie rod kit for 7 sections valve
5TIR112668 Tie rod kit for 8 sections valve
5TIR112730 Tie rod kit for 9 sections valve
5TIR112792 Tie rod kit for 10 sections valve
5TIR112854 Tie rod kit for 11 sections valve
5TIR112916 Tie rod kit for 12 sections valve
1.
Tie rod tightening torque 50 Nm (36.88 lbft)
M12 not -- wrench 19
2. 2. 5STA130270 Brakets kit

8 DBC005A
 SD25
Inlet cover options

Description example:
FE SD25 / A C (XG - 125) EL-- 12VDC - SAE *

1. 2. 3. 4.

Pressure relief valve setting in bar

4. 2.

SV

3.
L
X

EL 1. Y

SV

1. Inlet cover body * 4. Inlet valves options

CODE DESCRIPTION TYPE CODE DESCRIPTION
5FIA125801 AC--AD type body L XCAR425700 Hydraulic pilot unloader valve (FC1.5)
EL YCAR425305 12 VDC electromagnetic controlled
unloader valve
2. Inlet port selection * YCAR425310 24 VDC electromagnetic controlled
CODE DESCRIPTION unloader valve
3XTAP848220 SAE20 plug (n.1 plug required) SV 3XTAP536540 Relief valve blanking plug

3. Inlet relief options

TYPE CODE DESCRIPTION
VMP25/1 pilot operated pressure relief valve type X (standard)
(XG-- 125) X008211120 Range 25 to 315 bar / 360 to 4600 psi
standard setting 125 bar / 1800 psi
VMD25/1 direct pressure relief valve type Y
(YG3-- 125) XCAR125213 Range 125 to 220 bar / 1800 to 2900 psi
standard setting 125 bar / 1800 psi
Standard setting is referred to 10 l/min - 2.6 US gpm flow.

SV 3XTAP536540 Relief valve blanking plug

NOTE (*) -- Items are referred to UN- UNF thread.

DBC005A 9
SD25
Working section options

Description example: 1 mounted on A port.

2 mounted on B port.
EL SD25 / P -- 1 8 L . P 1 (G3 - 100) - SAE * 3 mounted on A and B ports.

1. 2. 3. 4. 5.
Port relief valve setting in bar

3.

8
1. Working section kits *
TYPE CODE DESCRIPTION
P 5EL1257000 Parallel
S 5EL2258000 Series I
Include boby, seals, rings and load check valve.

9B--10B--11B
2. Spool options
TYPE CODE CIRCUIT DESCRIPTION
1 3CU2710100 Double acting, 3 positions, with A and B
closed in neutral position
1A 3CU2721100 Double acting, 3 positions, with A open to tank
in neutral position
2 3CU2725100 Double acting, 3 positions, with A and B open
to tank in neutral position
11
3 3CU2731100 Single acting on A, 3 positions, B plugged;
requires SAE 16 plug (see part I)
4 3CU2735100 Single acting on B, 3 positions, A plugged; 1.
requires SAE 16 plug (see part I)

3. “A” side spool positioners 8P

TYPE CODE DESCRIPTION
8 5V08120000 With spring return in neutral position
9B 5V09120000 With detent in position 1 and spring return in
neutral position
10B 5V09120000 With detent in position 2 and spring return in
neutral position
11 5V11120000 With detent in position 1, neutral and 2
11B 5V11220000 With detent in position 1 and 2, spring return 8EI3
in neutral position
8P 5V08120701 Pneumatic kit
8EI3 5V08120350 12 VDC ON/OFF electro--hydraulic kit
5V08120351 24 VDC ON/OFF electro--hydraulic kit

NOTE (*) -- Items are referred to UN- UNF thread.

10 DBC005A
 SD25
Working section options

5. II 4. “B” side options

TYPE CODE DESCRIPTION
L 5LEV120000 Standard lever
P SLP 5COP120000 Without lever, with dust proof plate
TQ 5TEL120100 CD cable connection
TP 5TEL120005 CG cable connection
LCB 5CLO225000 Mechanical joystick
U
4.
5. Port relief options
C
L TYPE CODE DESCRIPTION
Anti--shock valve
P(G2-- 63) XCAR216115 Range 63 to 125 bar / from 900 to 1800 psi
P3T standard setting 63 bar / 900 psi
P(G3-- 100) XCAR216116 Range 100 to 2500 bar / from 1450 to 3600 psi
standard setting 100 bar / 1450 psi
P(G4-- 200) XCAR216117 Range 200 to 315 bar / from 2900 to 4600 psi
standard setting 200 bar / 290 psi
SLP Anti--shock and anti--cavitation valve
U(G2-- 63) XCAR316112 Range 63 to 125 bar / from 900 to 1800 psi
standard setting 63 bar / 900 psi
U(G3-- 100) XCAR316113 Range 100 to 2500 bar / from 1450 to 3600 psi
standard setting 100 bar / 1450 psi
2. U(G4-- 200) XCAR316114 Range 200 to 315 bar / from 2900 to 4600 psi
TQ standard setting 200 bar / 290 psi
Standard setting is referred to 10 l/min - 2.6 US gpm flow.

C 3XCAR416100 Anti--cavitation
P3T 3XTAP528360 A and B ports valve blanking plugs

TP I Port plug *
TYPE CODE DESCRIPTION
SAE16 3XTAP838200 Plug for single acting spool

II Optional handlevers
TYPE CODE DESCRIPTION
LCB AL01/M10x200 170013020 For L lever box L= 200mm/7.87in
AL08/M12x250 170013125 For LCB joystick L= 250mm/9.84in

II

For special configurations see pages 13 and 14

DBC005A 11
SD25
Spools options

1 0 2 1 0 2 1 0 2
A B A B A B
1 1A 1B
P T P T P T

1 0 2 1 0 2 1 0 2
A B A B
2 3 4
P T P T P T
“B” port plugged “A” port plugged

“A” side spool positioners

NPT1/2--27
V2
Operating features
V1 Pilot pressure : min 6 max 10 bar
2.24
57

61 min 87 max 145 psi

2.40

170.5
1 0 2 8 6.71

1 0 2 8P
1 0 2
11 ON/OFF pneumatic kit

V1 V2

1 0 15
Optional connector
code: 2X1001010

0 2 16
Connection ISO4400

Operating features
Nominal voltage : 12 VDC / 24 VDC
Power rating . . : 21 W
6.65
169

Duty cycle . . . . : 100%

L Pilot pressure . : from 10 to 50 bar
97 from 145 to 725 psi
3.82
V

1 0 2 9B

Feeder kit
1 0 2 10B (see page 13) 176
6.93

1 0 2 8EI3
ON/OFF electro--hydraulic kit
1 0 2 11B
V L

12 DBC005A
 SD25
Electro-- hydraulic feeder kit

3. PART TYPE CODE DESCRIPTION

1. KE1R3 5KE1R31770 kit for 1 section
KE2R3 5KE2R31770 kit for 2 sections
KE3R3 5KE3R31770 kit for 3 sections
KE4R3 5KE4R31770 kit for 4 sections
KE5R3 5KE5R31770 kit for 5 sections
2. KE6R3 5KE6R31770 kit for 6 sections
2. VRE XGIU655851 SAE back--pressure valve
(power beyond configuration)
1. 3. RE 4TAP426612 G 3/4 plug

NOTE -- Codes are referred to UN- UNF thread.

Special configurations

Hydraulic spool control

Operating features
Adjustment range : from 5.8 to 19 bar / 84 to 276 psi -- diagram 024 Working section kit
Max.pilot pressure : 100 bar / 1450 psi code 5EL125700B (standard body)

A B

71
SAE 6
2.80
1 0 2 VA VB
A B
1IM8IM
P T
VA VB
Ex.: EL SD25/P--1IM 8IM 83
3.27 384
Spool Spool control kit 15.12
code 3CU2710420 code 5IDR225700

DBC005A 13
SD25
Special configuration

4th position floating circuit

1 0 2 3
A B
513
4th position
P T spool in floating
Ex.: EL SD25/P--5 13... 97
3.82
Working section kit
Spool Spool control kit
code 5EL1257200 (special body)
code 3CU2741100 code 5V13025000

Regenerative circuit

1 0 2
A B
8P8CR
Spool in regenerative
P T

Ex.: EL SD25/P--8P 8CR... 61

2.40
Spool Spool control kit Working section kit
code 3CU2761100 code 5V08120020 code 5EL1257400 (special body)

1 0 2
A B
8F8CR
Spool out regenerative
P T

Ex.: EL SD25/P--8F 8CR... 61

2.40
Working section kit
Spool Spool control kit
code 5EL1257000 (standard body)
code 3CU2761200 code 5V08120020

14 DBC005A
 SD25
Intermediate sections

CS3
Mid return manifold.
To assemble different sizes of valve. Tie rods are special. Available combination SD25 / SD16.

343.5
13.52
50 62 84 48 38 26
1.97 2.44 3.31 1.89 1.50 1.02
SD16 inlet cover and
SD25 inlet cover and 21 42 12 working section
working section 0.83 1.65 0.47
102.5
4.04

88.5
3.48
17.5
0.69
1.97
14.02

50
356

3.94
5.31

100
135

11.58
294
SAE24
1. 2.
3.
282
11.10
A1 B1 A2 B2

P1 P2

125 175
1800 2500

Description example: SD25/1/AC(XG--125)/18L/CS3/18L/BC(YG3--175)/SD16/1

1. Tie rod kits for SD25 2. Tie rod kits for SD16
CODE DESCRIPTION CODE DESCRIPTION
5TIR4251 Kit for 1 section 5TIR4161 Kit for 1 section
5TIR4252 Kit for 2 sections 5TIR4162 Kit for 2 sections
5TIR4253 Kit for 3 sections 5TIR4163 Kit for 3 sections
5TIR4254 Kit for 4 sections 5TIR4164 Kit for 4 sections

3. Intermediate sections *
CODE DESCRIPTION
617445010 Mid return manifold section NOTE (*) -- Code are referred to UN- UNF thread.

DBC005A 15
SD25
Outlet cover options

Description example:
FS SD25 / RC - SAE *

2.

3.
RE--RK option

1.

Outlet section parts Circuit option

PART CODE QTY DESCRIPTION PART CODE QTY DESCRIPTION
1. 3FIA225801 1 Outlet section body * 3. 4TAP426612 1 G 3/4 plug for
2. 3XTAP848220 1 SAE 20 plug * power beyond (RE) and
closed center (RK) configuration

NOTE (*) -- Items are referred to UN- UNF thread.

16 DBC005A
 SD25
Installation and maintenance
The SD25 valve is assembled and tested as per the technical specification of this catalog.
Before the final installation on your equipment, follow the below recommendations:
-- the valve can be assembled in any position, in order to prevent working sections deformation and spools sticking mount the
product on a flat surface;
-- in order to prevent the possibility of water entering the lever box and spool control kit, do not use high pressure wash down directly
on the valve;
-- prior to painting, ensure plastic port plugs are tightly in place.

A2
A1 T
B2
B1
C

Power beyond configuration

Fitting tightening torque - Nm / lbft

THREAD TYPE P and C ports A and B ports T port
BSP (ISO 228/1) G1 G1 G 1--1/4
With O--Ring seal 100 / 73.7 100 / 73.7 190 / 140.2
With copper washer 90 / 66.3 90 / 66.3 150 / 110.6
With steel and rubber washer 100 / 73.7 100 / 73.7 190 / 140.2
UN--UNF (ISO 11926--1) 1 5/8--12 UN--2B (SAE 20) 1 5/16--12 UN--2B (SAE 16) 1 5/8--12 UN--2B (SAE 20)
With O--Ring seal 200 / 147.5 150 / 110.6 200 / 147.5

NOTE -- These torque are recommended. Assembly tightening torque depends on many factors, including lubrication, coating and
surface finish. The manufacturer shall be consulted.

DBC005A 17
SD25
Notes
The SD25 valve can be supplied with one coat of opaque black paint (CVN configuration).
Example of specification: SD25/2/AC(XG--125)/18L/18L/RC--<CVN>

NOTE -- For different color consult Customer Service.

18 DBC005A
 SD25

DBC005A 19
 WALVOIL S.P.A.
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TEL. +39.0522.932411 · FAX +39.0522.300984
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CUSTOMER SERVICE
TEL. +39.0522.932555 · FAX +39.0522.932455

DBC005A