hydraulic control valve

SECTIONAL PROPORTIONAL

COMPACT CATALOGUE

LOAD--SENSING VALVE

Working conditions

Features

Simple, compact and heavy duty designed sectional valves from 1 to 10 sections, for systems with fixed displacement pumps (opencentre version) or variable displacement pumps with Load--Sensing compensator (closed centre version).H Load--indipendent flow control.H Fitted with a main pressure relief valve and a load check valve on every working section.H Diameter 18 mm -- 0.71 in nterchangeable spools.H A wide variety of ports service valves.H Available manual, pneumatic, hydraulic, electro--hydraulic and remote with flexible cables spool control kits.

This catalogue shows technical specifications and diagrams measured with mineraloil of46 mm2/s -- 46 cSt viscosity at 40°C temper-ature.

WARNING!All specifications of this catalogue 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

INCORRECT USE OF THE PRODUCT.5th edition February 2001:This edition supercedes all prior documents.

Additional informationThis catalogue shows the product in the most standard configurations.Please contact Customer Service Dpt. for more detailed information orspecial request.

DLS8

2 DCC002E

Nominal flow rating Stand by 14 bar / 200 psi 90 l/min

Operating pressure (maximum) 315 bar 4600 psi

Back pressure (maximum) on outlet port T 25 bar 360 psi

Internal leakage A(B)→T∆p=100 bar -- 1450 psifluid and valve at 40°C

3 cm3/min 0.18 in3/min

Fluid Mineral base oil

Fluid temperature with NBR (BUNA--N) seals from --20° to 80°C

with FPM (VITON) seals from --20° to 100°C

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

Ambient temperature from --40° to 60°C

Tie rod tightening torque 30 Nm 22.2 lbft

NOTE -- For different conditions please contact Customer Service.

Dimensional data (with inlet compensator)

110.43

140.55

80.

31

19 0.75

331.3

943.70

1204.72

22.50.89

52.52.07

∅

Position 2

Posit. 0

Position 1

WA

LVO

ILP

000000111C

200005M

AD

EIN

ITALY

WALVOILP000000111C200005

MADE IN ITALY

Valve typeProduction batch :P00 = production year (2000)00001 = progressive number

411.61

411.61

311.22

21.50.85

50.20

50 1.97

90 3.54

5 0.20

62 2.44

14 0.55

36.5

1.44

66 2.60

37.5

1.48

269.

510

.61

M10

E

F

411.61

411.61

47.51.87

56.52.22

DLS8

3DCC002E

TYPEE F Weight

TYPEE F Weight

TYPEmm in mm in kg lb

TYPEmm in mm in kg lb

DLS8/1 145 5.71 82 3.23 8.6 19 DLS8/6 350 13.78 287 11.3 26.9 59.3

DLS8/2 186 7.32 123 4.84 12.3 27.1 DLS8/7 391 15.39 328 12.91 30.6 67.5

DLS8/3 227 8.93 164 6.46 16 35.3 DLS8/8 432 17 369 14.52 34.3 75.7

DLS8/4 268 10.55 205 8.07 19.7 43.4 DLS8/9 473 18.61 410 16.13 38 83.9

DLS8/5 309 12.16 246 9.68 23.4 51.6 DLS8/10 514 20.22 451 17.74 41.7 92.1

Standard threads

PORTS BSP(ISO 228/1)

UN--UNF(ISO 11926--1)

Inlet P -- Outlet T G 3/4 7/8--14 UNF--2B (SAE 10)A and B ports G 1/2 3/4--16 UNF--2B (SAE 8)Load sensing LS G 1/4 9/16--18 UNF--2B (SAE 6)PILOT PORTSPneumatic NPTF 1/8--27 NPTF 1/8--27Hydraulic G 1/4 9/16--18 UNF--2B (SAE 6)

Variable displacement pump with load--sensing compensator (closed centre)

Fixed displacement pump (open centre)

Hydraulic circuit

Ex.: DLS8/2/AN(G3--125)/6N8LF3/6N8LF3/RF

Ex.: DLS8/2/AM(G3--125)/6N8LF3/6N8LF3/RF

Ex.: DLS8/2/AP(SV)/6N8LF3/6N8LF3/RF

PA1 B1 A2 B2

T

LS

PA1 B1 A2 B2

T

LS

PA1 B1 A2 B2

T

LS

1251800

1251800

∅1mm0.039in

∅1mm0.039in

∅0.

75m

m0.

029i

n

With main relief valve

Without main relief valve

DLS8

4 DCC002E

Work port to outlet

Inlet to work port

Open centre

Performance data (pressure drop vs. flow)

0

10

20

30

40

0 30 60 90 120Flow

Pre

ssur

edr

op

540

360

180

(l/min)

(bar)(psi)

0

10

20

30

40

0 30 60 90 120Flow

Pre

ssur

edr

op

540

360

180

(l/min)

(bar)(psi)

0

10

20

30

40

0 30 60 90 120Flow

Pre

ssur

edr

op

From top inlet to top outlet.

From top inlet to A port (spool in position 1) or B port (spool in position 2).

From A port (spool in position 2) or B port (spool in position 1) to top outlet.

NOTE -- Measured with spool type 6N.

540

360

180

(l/min)

(bar)(psi)

P→A10(B10)

P→A1(B1)

P→A6(B6)

A6(B6)→T

A1(B1)→T

A10(B10)→T

A1 A10

B1 B10

P

T

A1 A10

B1 B10

P

T

A1 A10

B1 B10

P

T

DLS8

5DCC002E

DLS8

6 DCC002E

5. Spool options

4. Working section kit *

3. Inlet relief options

2. Compensator options

1. Inlet cover kit *

Ordering codes

1 mounted on A port.

2 mounted on B port.

3 mounted on A and B ports.

DLS8/2 A M (G3 -- 125) / 6N 8 LF3 . P 3 (G3 -- 120) / 6N 8 LF3 / RF *

TYPE CODE DESCRIPTION(M) 5KIT008300 Compensator kit(N)--(P) 5KIT008310 Replacing compensator kit

CODE DESCRIPTION5EL1083000 Standard

TYPE CODE CIRCUIT DESCRIPTIONDouble acting, 3 position, with A and B closed in neutral position6V 3CU3410020 Spool flow 20l/min6Q 3CU3410040 Spool flow 40l/min6S 3CU3410060 Spool flow 60l/min6N 3CU3410090 Spool flow 90l/minDouble acting, 3 position, with A and B open to tank in neutral position7V 3CU3425020 Spool flow 20l/min7Q 3CU3425040 Spool flow 40l/min7S 3CU3425080 Spool flow 60l/min7N 3CU3425090 Spool flow 90l/min

Flows are referred to ∆p of 14 bar (200 psi)

6.

2.

1st section following section

7FT

CODE DESCRIPTION5FIA308310 Type AM5FIA308311 Type AN5FIA308312 Type AP

Include boby, seals, rings and load check valve.

8MD

2.

3.

1.

TYPE CODE DESCRIPTIONLoad--sensing pressure relief valve(G3--125) XCAR602100 Range 100 to 200 bar / 1450 to 2900 psi

standard setting 125 bar / 1800 psi(G4--250) XCAR602200 Range 160 to 315 bar / 2320 to 4570 psi

standard setting 250 bar / 3600 psiStandard setting is referred to 10 l/min flow.

(SV) XTAP220440 Relief valve blanking plug

5. 6. 7. 9.1. 3.

4.

8.

10.

M

N--P

G3SVG4

NOTE (*) -- Items are referred to BSP thread. For special configurations see pages 9

Load--sensing pressure relief valve setting in bar Port relief valve setting in bar

Description example:

DLS8

7DCC002E

I Optional handlevers

10. Assembling kit

9. Return cover *

8. Port relief options

7. “B” side options

6. “A” side spool positioners

Ordering codes

TYPE CODE DESCRIPTIONLF3 5LEV108710 Lever with stroke limitersSLP 5COP108000 Without lever, with dust proof plateTQ 5TEL108110 CD cable connectionLCB 5CLO208000 Mechanical joystick

7.

5.

TYPE CODE DESCRIPTIONRF 61C431000 Standard

LF3

SLP

I

TYPE CODE DESCRIPTIONAL01/M10x200 170012020 For LF3 lever box L= 200mm/7.87inAL08/M12x200 170013120 For LCB joystick L= 200mm/7.87in

CODE DESCRIPTION5TIR108128 tie rods with nuts for 1 sections5TIR108169 tie rods with nuts for 2 sections5TIR108210 tie rods with nuts for 3 sections5TIR108251 tie rods with nuts for 4 sections5TIR108292 tie rods with nuts for 5 sections5TIR108333 tie rods with nuts for 6 sections5TIR108374 tie rods with nuts for 7 sections5TIR108415 tie rods with nuts for 8 sections5TIR108456 tie rods with nuts for 9 sections5TIR108497 tie rods with nuts for 10 sections

2.

9.

8.

P

U

C

P3T

10.

TQ

TYPE CODE DESCRIPTIONAnti--shock valveP(G3--100) 3XCAR208113 Range 50 to 220 bar / from 730 to 3200 psi

standard setting 100 bar / 1450 psiP(G4--200) 3XCAR208114 Range 180 to 350 bar / from 2600 to 5100 psi

standard setting 200 bar / 2900 psiAnti--shock and anti--cavitation valveU(G2--63) XCAR308112 Range 20 to 80 bar / from 230 to 1160 psi

standard setting 63 bar / 900 psiU(G3--100) XCAR308115 Range 50 to 220 bar / from 730 to 3200 psi

standard setting 100 bar / 1450 psiU(G4--200) XCAR308114 Range 180 to 350 bar / from 2600 to 5100 psi

standard setting 200 bar / 2900 psiStandard setting is referred to 10 l/min flow.

C XCAR408110 Anti--cavitationP3T 3XTAP524290 A and B ports valve blanking plugs

TYPE CODE DESCRIPTION7FT 5V07208100 With friction8 5V08108000 With spring return in neutral position

LCB

I

M

N--P

501.97

“B” side options

“A” side spool positioners

Spools options

201A B

P T6 7

201A B

P T

201 8

883.46

201 7FT

22.5

0.89

75 2.95 87 3.

43

401.57

77.53.05

M10

90.35

512.01

97.53.84

201

201

LF3

SLP

201TQ

Horizontalhandlever assemblyVertical handlever

assembly

CD flexible cable to beordered separately

401.57

983.86

M12

201

201

LCB

DLS8

8 DCC002E

DLS8

9DCC002E

Proportional hydraulic spool control

Proportional pneumatic “A” side spool positioner

Special configurations

G 1/459

323

73.5

2.32

2.89

12.72

90.53.56

Operating featuresAdjustment range : from 6 to 16.3 bar / 87 to 236 psi

diagram 021Max.pilot pressure : 50 bar / 725 psi

VA VB

Ex.: EL DLS8--6N 8IMF3

VA VB

201

VA VB

1234.84

46.5

1.83

VA VB

NPT1/8--27

Operating featuresAdjustment range : from 1 to 5.5 bar / 14.5 to 79.8 psi

diagram 501AMax.pilot pressure : 10 bar / 145 psi

201

Ex.: EL DLS8--6N 8PF....

Spool control kit: code 5IDR208220

Standard spool

Special working section kit: code 5EL108300A(standard body)

Spool control kit: code 5V08108705

Standard spool

Special working section kit: code 5EL108300D(standard body)

8PF

8IMF3

DLS8

10 DCC002E

Fitting tightening torque -- Nm / lbft

THREAD TYPE P and T ports A and B ports LS signal

BSP (ISO 228/1) G 3/4 G 1/2 G 1/4With O--Ring seal 70 / 51.6 50 / 36.9 20 / 14.7With copper washer 70 / 51.6 60 / 44.3 25 / 18.4With steel and rubber washer 70 / 51.6 60 / 44.3 16 / 11.8

UN--UNF (ISO 11926--1) 7/8--14 UNF--2B (SAE 10) 3/4--16 UNF--2B (SAE 8) 9/16--18 UNF--2B (SAE 6)With O--Ring seal 90 / 66.4 60 / 44.3 30 / 22.1

Installation and maintenance

The DLS8 valve is assembled and tested as per the technical specification of this catalogue.Before the final installation on your equipment, follow the below recommendations:-- the valve can be assembled in any position; in order to prevent working section deformation and spool 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.

AN inlet cover configuration

LS

T

A1A2

B2B1

P

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

DLS8

11DCC002E

WALVOIL S.P.A.

42100 REGGIO EMILIA • ITALY • VIA ADIGE, 13/DTEL. +39.0522.932411 • FAX +39.0522.300984

E--MAIL: [email protected] • HTTP: //WWW.WALVOIL.COM

CUSTOMER SERVICE

TEL. +39.0522.932555 • FAX +39.0522.932455

D1409808IDCC002E