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Reference: 100-P-000089-E-02

Issue: 06.2009

Proportional Directional Valve System

Series LVS

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Contents Page

1 General

description 3

2 Inlet

sections 4

3 Directional

valve

sections

general

information 10

4 Directional

sections,

LVS08 12

5 Directional

sections,

LVS12

operated

hand

lever 17

6 Directional

sections,

LVS12

hydraulically

operated 20

7 Directional

sections,

LVS12

two-stage,

proportional,

electro-hydraulic 23

8 Directional

sections,

LVS12

with

digital

pilot

head 27

9Valve

models

for

the

LVS12

directional

valve

system 31

10 Intermediate

sections 33

11 End

sections 35

12 Bolt-on

plates 37

13 Accessories 40

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1 General description

Inlet section

End section

2-stage, proportional,

electro-hydraulically op

erated directional valve

Direct acting, solenoid-

operated directional

valve, on-off or

proportional

Hydraulically

operated

directional valve

Tie bolts

Directional valve

with digital pilot head

(on-board electronics)

Manually operated

directional valve

With the LVS hydraulic valve, designers can easely create

mobile-machine control systems that, are normaly difficult

to master. Its systematic design as a family of valve mod

ules offers exceptional adaptability.

All directional sections are designed as load-sensing direc

tional valves with one main bore. The pressure-com

pensated models are designed as hollow spools with flow-

force compensation. The associated, independent indi

vidual-section pressure compensators for service ports A

and B operate on the principle of proportional flow-sharing.

The integral auxiliary functions and high power density

make the LVS not only a highly adaptable modular valve,

but also a very compact unit.

LVS valve blocks can be configured for both fixed- and vari

able-displacement pumps.

The basic LVS valve block has 6 control options: hand lever,

on/off solenoid, proportional solenoid, hydraulic, propor

tional electro-hydraulic, and with digital pilot head. With the

proportional flow-sharing principle of the LVS directional

valves, and in contrast to conventional load-sensing valves,

the load signal is fed directly to the variable-displacement

pump or system pressure-control valve i.e. without using a

series of shuttle valves.

1.1 Pump systems

1.1.1 Fixed-displacement pump

The valve block includes a 3-way pressure compensator,

directional sections and block termination components. In

the neutral position, the 3-way pressure compensator is un

loaded to tank and the entire flow being supplied to the valve

passes through the 3-way compensator to tank with min

imal off-load pressure drop.

When a directional section is operated, the actuator pres

sure is signalled to the 3-way pressure compensator. The

3-way compensator maintains the Δp at a constant level, so

that the flow rate is independent of the load and proportional

to the open flow area of the metering orifice in the directional

valve.

1.1.2 Variable-displacement pump

In systems with a variable-displacement pump (load-sens

ing control), as well as the normal p-line, the control line is

also connected to the pump control. When all directional

valves are in the neutral position, the control line is connec

ted to tank and the pump de-strokes. When a directional

section is operated, the actuator pressure is signalled to the

pump control and the pump goes on-stroke until the defined

control Δp is reached.

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1.2 General technical data

Oil temperature -25 °C to 80 °C

Oil viscosity for reliable operation, 380 to 10 mm

/s (cSt); for rated performance, 80 to 20 mm

/s (cSt)

Oil cleanliness at least 19/16/14 to ISO 4406 or class 9 to NAS 1638

Pressure LVS08: pump port 250 bar, actuator ports 280 bar, tank port 200 bar static.

LVS12: pump port 350 bar, actuator ports 400 bar, tank port 50 bar static (optional: 200 bar)

Flow rate Q

max.

from 6 l/min to 180 l/min at max. 12 bar pressure drop from P port of valve block to LS

(maximum allowable pressure drop: 20 bar, theoretical Q

max.

= 232 l/min)

Energy consump

tion

LVS08: on/off solenoid 6.8 Ω, 30 W; proportional solenoid 12 VDC / 2.5 A, 24 VDC / 1.25 A at max

imum stroke. LVS12 electro-hydraulic: 12 VDC / 1.5 A, 24 VDC / 0.75 A at maximum stroke. Digital

pilot head: 0.6 A at 12 Volt, 0,3 A at 24 Volt, on/off operation 8 W

On-board voltage minimum required for on/off solenoids: 10.8 VDC / 21.6 VDC at the coil contact pins

Pressure medium

(hydraulic fluid)

recommendation: high-quality fluids with a mineral-oil base, such as HLP oils to DIN 51524 Part 2.

For other fluids (e.g. phosphate esters), please consult Bucher

Sections maximum 10 directional sections per valve block

2 Inlet sections

2.1 Technical data

Unit Value

Inlet pressure bar max. 350

Nominal flow rate / open-centre systems l/min max. 200

Nominal flow rate / closed-centre systems l/min max. 260

Nominal flow rate, A and B to T l/min max. 300

Far other values consalt Bucher Hydraulics

2.2 Functions

2.2.1 LS Unloading

The higher loaded directional valve signals its load pressure

to the LS gallery when it is in a working position. In the neut

ral position, no load is signalled. In the proportional flow-

sharing system, all control valves are connected to the

same load-sensing pressure. This means that pressure un

loading in the neutral position is ensured by a controlled

connection to tank (Q

LSmax

approx. 0.7 l/min).

2.2.2 LS

max

pressure relief

The LS

max

pressure (pressure relief) at the valve block must

be set below the pressure cut-off setting of the pump.

Without this pressure-relief function, all activated actuators

stop when any actuator reaches its end-stop. If this is not a

disadvantage in a system, the LS

max

pressure-relief func

tion in the valve block is not required.

IMPORTANT: the pressure setting at the LS

pump must be higher than

max

pressure relief by at

least the LS-Δp of the pump (see also 3.2.5)

2.2.3 3-way pressure compensator

The 3-way pressure compensator keeps the pressure dif

ference between the pressure and control galleries inside

the block at a constant level. The surplus flow passes to

tank or to the surplus-flow port.

2.2.4 2-way pressure compensator

The 2-way compensator is a differential-pressure valve. It

is situated inside the block, before the pressure gallery. By

reducing the inlet pressure to this valve, the control pres

sure between the pressure and control galleries inside the

block is kept at a constant level. If the pressure in the control

line reaches the setting of an upstream pressure-relief

valve, the valve shuts off the supply to the block.

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2.2.5 2-stage pressure relief (only in conjunction

with 3-way pressure compensator)

If the pressure in the control line reaches the setting of an

upstream pressure-relief valve, the 3-way compensator

opens to tank, thus limiting the pressure in the pressure gal

lery inside the block.

2.2.6 External priority function, with “Dynamic

Flow” in the LS line

An external actuator always has priority when receiving

supply. Only when the external actuator is already being

supplied with the required flow is any surplus flow then fed

to the valve block. A defined oil flow runs through the LS line

to the priority actuator. This has the effect of shortening the

priority function's reaction time.

2.2.7 LS pressure relief in the priority flow

If the pressure in the control line reaches the LS pressure-

relief setting, the flow to the priority actuator is reduced until

the pressure in the LS line equals the setting of the pres

sure-relief valve. The flow that is no longer required is now

available to other actuators.

2.2.8 Pressure control in P

Direct-acting pressure-relief function in the inlet flow in P.

2.3 Ordering code

Functions

No control function, no ports = CA*

No control function / P, R and LS ports = CAP

LS unloading / P, R and LS ports = CB*

max

pressure relief

(P1=) / P, R and LS ports = CC*

max

pressure relief

(P1=) /

electrical LS-disable via 2/2 seat valve /

de-energised open / P, R and LS ports = CCL

max

pressure relief

(P1=) / LS unloading /

P, R and LS ports = CE*

max

pressure relief

(P1=) / LS unloading/

pressure relief in P (P=) / P, R and LS ports = CD*

3-way compensator / LS unloading / two-stage

pressure relief (P1=) / P and R ports = CF*

3-way compensator / LS unloading / two-stage

pressure relief (P1=) / reduced off-load pressure

(control Δp = 9 bar) / P and R ports = CFE

3-way compensator / LS unloading / two-stage

pressure relief (P1=) / electrical LS-disable via

2/2 seat valve / de-energised open / P and R ports = CFL

2-way compensator / flow cut-off (P1=) /

LS unloading / P, R and LS ports = CF2

LVS CF -- E - G1 1 0* J12

Solenoid voltage + sol. connector

AMP Junior Timer, 12 V = J12

AMP Junior Timer, 24 V = J24

Not required for models without elec

trical connections

Port threads to DIN 3852 - Part 2

P and R G1”

LS G1/4”

Priority flow G1/2” = G110

Without threaded ports = ****

A 00/

Design stage

Inlet section

Options (see 2.7)

Pressure

setting in bar

P = ....

P1 = ....

P2 = ....

P3 = ....

Dyn. LS

max

pr. relief in prio. flow

(P2=) / LS

max

pr.

relief in surplus flow (P3=) / external prio. function /

LS unloading / P, PL, R, LS and LSL ports = CG*

3-way compensator / 2-stage pressure relief (P1=) /

mechanical switchover, OC - CC /

LS unloading / P, R and LS ports = CH*

3-way compensator / 2-stage pressure relief (P1=) /

mechanical switchover, OC - CC /

LS unloading / reduced off-load pressure

(control Δp = 9 bar) / P, R and LS ports = CHE

P = pressure setting for the pressure relief in the P inlet

P1 = pressure setting for the LS max pressure relief (inlet presseur = P1+Δp)

1) fixed pressure settings in bar available for the pressure-relief function

(measured at 10 l/min test flow) 25, 32, 40, 50, 63, 80, 100, 125, 140, 160,

175, 190, 210, 230, 250, 280, 300, 330, 350 (for other pressures, consult

Bucher Hydraulics) 2) adjustable pressure

P2 = pressure setting for the pressure relief in the priority flow

P3 = pressure setting for the pressure relief in the surplus flow

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2.4 Inlet sections for systems with fixed-displacement pump (open centre)

Model code and symbol Description

LVS-E-CF*-G110A00

LSLS

- 3-way compensator

- two-stage pressure relief (P1 = ...)

- LS unloading

- control Δp = 12 bar

- threaded ports for P (G1”) and R (G1”)

Specify pressure setting in bar at the end of the ordering code

(P1 = inlet pressure + Δp)

LVS-E-CFE-G110A00

- 3-way compensator

- two-stage pressure relief (P1 = ...)

- LS unloading

- reduced off-load pressure (control Δp = 9 bar)

- threaded ports for P (G1”) and R (G1”)

Specify pressure setting in bar at the end of the ordering code

(P1 = inlet pressure + Δp)

LVS-E-CFL-G110J..A00

- 3-way compensator

- two-stage pressure relief (P1 = ...)

- LS unloading

- control Δp = 12 bar

- electrical LS-disable via 2/2 seat valve, de-energised open

- threaded ports for P (G1”) and R (G1”)

Specify pressure setting in bar at the end of the ordering code

2.5 Inlet sections for systems with load-sensing pump (closed centre) and block com

binations

Model code and symbol Description

LVS-E-CA*-****A00

- no control function

- no ports

LVS-E-CALVS-E-CAP-G110A00

LSLS

- no control function

- threaded ports for P (G1”), R (G1”) and LS (G1/4”)

LVS-E-CB*-G110A00LVS-E-

LSLS

- LS unloading

- threaded ports for P (G1”), R (G1”) and LS (G1/4”)

LVS-E-CC*-G110A00

LSLS

-LS

max

pressure relief, fixed setting

- threaded ports for P (G1”), R (G1”) and LS (G1/4”)

Specify pressure setting in bar at the end of the ordering code

LVS-E-CE*-G110A00LVS-E-

-LS

max

pressure relief (P1 = ...), fixed setting

- LS unloading

- threaded ports for P (G1”), R (G1”) and LS (G1/4”)

Specify pressure setting in bar at the end of the ordering code

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LVS-E-CD*-G110A00LVS-E-

- pressure relief in P (P = ...)

-LS

max

pressure relief (P1 = ...), adjustable

- LS unloading

- threaded ports for P (G1”), R (G1”) and LS (G1/4”)

Specify pressure setting in bar at the end of the ordering code

LVS-E-CCL-G110J..A00LVS-E-

-LS

max

pressure relief (P1 = ...), fixed setting

- electrical LS-disable via 2/2 seat valve, normally open

- threaded ports for P (G1”), R (G1”) and LS (G1/4”)

Specify pressure setting in bar at the end of the ordering code

LVS-E-CF2-G110A00LVS-E-

RLS

- 2-way compensator

- flow cut-off

- LS unloading

- control Δp = 12 bar

- threaded ports for P (G1”), R (G1”) and LS (G1/4”)

LVS-E-CG*-G110A00LVS-E-

LSL

- external priority function

- dynamic LS

max

pressure relief in the priority flow (P2 = ...)

-LS

max

pressure relief in the surplus flow (P3 = ...), adjustable

- LS unloading

- control Δp = 14 bar

- threaded ports for P (G1”), R (G1”), LS, LSL and LSP (G1/4”)

Specify pressure setting in bar at the end of the ordering code

2.6 Inlet sections with switchover for systems with LS or fixed-displacement pumps

Model code and symbol Description

LVS-E-CH*-G...***LVS-E-

- 3-way compensator

- two-stage pressure relief (P1 = ...)

- LS unloading

- control Δp = 12 bar

- mechanical switchover, open centre - closed centre

- threaded ports for P (G1”), R (G1”) and LS (G1/4”)

Specify pressure setting in bar at the end of the ordering code

LVS-E-CHE-G...***LVS-E-

- 3-way compensator

- two-stage pressure relief (P1 = ...)

- LS unloading

- mechanical switchover, open centre - closed centre

- reduced off-load pressure (control Δp = 9 bar)

- threaded ports for P (G1”), R (G1”) and LS (G1/4”)

Specify pressure setting in bar at the end of the ordering code

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2.7 Options

Model code Description

LVS-E-C..-....01 -LS

max

pressure relief, adjustable

LVS-E-...-....02 - threaded ports for external pilot pressure

LVS-E-C.*-....19 - measurung threaded ports, M16 x 1,5 for system pressure (P inlet)

LVS-E-C.*-....20

- measurung threaded ports, M16 x 1,5 for system pressure (P inlet)

- threaded ports for P and T on the top, like A and B of the directional

control valve

LVS-E-C..-....22

- pressure relief valve for inlet pressure

LVS-E-CE*-....29

- threaded ports for P and T on the top, like A and B of the directional

control valve

-E-

-....

-LS

max

pressure relief, adjustable

- threaded ports for P and T on the top, like A and B of the directional

control valve

2.8 Performance graphs

2.8.1 Priority valve

residual flow to internal actuators

Q [l/min] = priority flow

p [bar] = load pressure at priority actuator

100

p [bar]

Q [l/min]

0 50 100 150 200

2.8.2 Control curve for the 3-way compensator in

the inlet plate

Q [l/min] = flow rate through the block

Δp [bar] = pressure drop from P to LS

0 20 40 60 80 100 120

CFE

CF*

Δp [bar]

Q [l/min]

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2.9 Dimensions

G1”

G3/4”

133

32.5

67,5

135

G1/4”

124

M 10

169.5

67.5

28.5

133

135

7.5

M10

LVS-E-CG*-G...***LVS-E-CE*-G...***

135

M10

133

124

133

124

185

212,5

43 67,5

67,5

G1”

G1/4”

LVS-E-CA*-****00

LVS-E-CF*-G110A00

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3 Directional valve sections - general information

The LVS modular valve system includes the nominal sizes 08 and 12. The valve bodies are the same size and can be directly

combined with each other.

3.1 Technical data

LVS08 LVS12

Control types

- direct acting on/off solenoid

- direct acting proportional solenoid

- hand lever operated

- hydraulically operated

- two-stage, proportional, electro-hydraulically operated

- digital pilot head with On Board Electronics

Nominal flow rate [l/min] 50 180

Maximum inlet pressure [bar] 250 350 *

Maximum pressure at the actuator ports A and B [bar] 280 400 *

Options

- 2 proportional flow-control functions for A and B

- downstream compensator

- anti-shock and make-up function

- electrically operated seat valves (integral)

- manual override by pin

- manual override by hand lever

- spool-stroke limiter

- port for external control pressure

- bolt-on plate with seat valves

- bolt-on plate with load-control valves

* For inlet pressure < 300 bar and actuator pressure < 320 bar contact Bucher Hydraulics

3.2 Functions

3.2.1 Directional function

3-way valves have only one actuator port. 4-way valves are

designed for double-acting actuators.

Spool types 6A(5) and 6D(5) are designed to supply 2 motor

drives.

In spool type 6A(4), the spool is divided in two parts. The

supply and return flows act on one actuator. The load pres

sure can be defined by means of the opening ratio.

3.2.2 Two independent 3/2 prop. directional valves

By dividing the control spool [6A(5)], 2 motor drives can be

implemented in parallel, and independently of one another,

in one valve body.

3.2.3 Load-independent operation

When several valves are operated simultaneously, the

highest actuator pressure is signalled to the 3-way pressure

compensator or to the pump control. The control pressure-

difference of the system pressure control (3-way pressure

compensator, variable-delivery pump) acts directly on the

most highly loaded actuator and ensures load-independent

control. The lower loaded actuators can be made load-inde

pendent by using individual section compensators.

3.2.4 LS-max pressure relief

If no oil flows out from an actuator port although the valve is

in an operated position (ex. cylinder at end-stop), the P pres

sure is signalled in the LS ring circuit behind all compensat

ors. The compensators in the individual functions would

now also close due to their spring forces, and all actuators

would remain stationary.

To prevent this from happening, the LS

max

pressure is lim

ited by a pressure-relief function. The discharge of LS flow

reduces the pressure before the LS ring circuit, which res

ults in the planned Δp being kept constant. The actuators in

the system now operate without any malfunction.

3.2.5 Downstream compensator

When a valve system that is designed to the proportional

flow-sharing principle is receiving sufficient pump flow and

has adequately-sized supply lines, it functions like a system

with upstream compensators.

For the most highly loaded actuator, the pressure drop

across the spool orifice is determined by the system pres

sure control (pump controller or system pressure com

pensator). On the individual compensators of the other ac

tuators, the highest system load is reproduced behind the

spool metering orifice and thus the system pressure control

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also applies to these actuators, and the pressure com

pensators counteract the effects of the different load pres

sures on each section.

If the flow demand is more than the pump can supply, the

pump pressure simply falls. With the principle of propor

tional flow-sharing, the flow rate to all actuators is reduced.

3.2.6 Anti-shock and make-up function

The anti-shock valves protect actuators from unacceptably

large pressure peaks when the actuator is operated or when

external forces act on the actuator. The make-up (anti-cavit

ation) function supplies oil to the actuator when the tank

pressure is higher than the actuator pressure.

3.2.7 Load sensing

By means of the load sensing system, the highest prevailing

actuator pressure is signalled to all proportional flow-shar

ing valves.

3.2.8 Conversion factors

For a given spool position, the flow rate at the actuator ports

can be changed by altering the LS Δp setting at the com

pensator or pump controller. The corresponding conversion

factors are shown in the table below.

LS Dp Conversion factor

6 bar 0.7

8 bar 0.8

10 bar 0.9

12 bar 1.0

14 bar 1.05

16 bar 1.15

18 bar 1.25

20 bar 1.30

3.3 Performance graphs

3.3.1 Pressure drop with individual operation

Measured with spool type O = 180 l/min

Q [l/min] = flow rate from block inlet to actuator

Δp [bar] = pressure difference from block inlet to actuator

Δp [bar] / - A/B

0 50 100 Q [l/min]

150

1 valve section

9 valve sections

3.3.2 Anti-shock valve

Q [l/min] = flow rate from actuator to tank

Δp [bar] = pressure difference from actuator to tank

Δp [bar]

100

150

200

250

300

350

0102030405060

Q [l/min]

For flow rates < 60 l/min contact Bucher Hydraulics

3.3.3 Pressure drop with individual operation

Measured with spool type O = 180 l/min

Q [l/min] = flow rate from actuator to tank

Δp [bar] = pressure difference from actuator to tank

Δp [bar]

0 50 100 150 200 250 300

Q [l/min]

9 valve sections

1 valve section

3.3.4 Make-up valve

Q [l/min] = flow rate from tank to actuator

Δp [bar] = pressure difference from tank to actuator

Q [l/min]010203040

Δp [bar]

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4 Directional sections, LVS08

4.1 Ordering code

Spool function

3-way function = 3

4-way function = 4

LVS

Dir. valve section

Plug type

AMP Junior Timer = J

Deutsch DT04-2P-EP04 = T

Port threads to DIN 3852 - Part 2

Actuator ports A and B G1/2” = 21

Prepared for bolt-on plate = 00

Size = 08

4 A 5 A J A B

Pressure

setting in bar

= ....

Flow rate in l/min

Actuator port A B

6 l/min = A = A

10 l/min = B = B

16 l/min = C = C

25 l/min = D = D

32 l/min = E = E

40 l/min = F = F

50 l/min = P = P

With 3-way function = *

0021DD08

Pilot head

On/off solenoid 12V = A

On/off solenoid 24V = B

Proportional solenoid 12V = C

Proportional solenoid 24V = D

Manual override, etc.

Override pin (standard) = A

Design stage

Options

Anti-shock and make-up function

Actuator A = pos. 1, B = pos. 2

Without = *

Make-up valve = C

Anti-shock and make-up valve

- adjustable, 70-230 bar = A

- adjustable, 150-380 bar = B

- Fixed setting

(values in bar)

25= D 32 =E 40 = F 50 = G 63 = H

80= I 100 =K 125 = L 140 = M 160 = N

175= O 190 =P 210 = Q 230 = R 250 = S

280= T 300 =U 330 = V 350 = W 380 = X

400= Y 420 =Z Cavity prepared = #

Seat valves, solenoid operated

Plug type AMP

max

20 l/min, de-energised closed

- double-acting seat valve in B = J5

- dbl.-acting seat valve in A+B = J6

max

50 l/min, de-energised closed

- single-acting seat valve in B = J3

- sgl.-acting seat valve in A+B = J4

- double-acting seat valve in B = J7

- dbl.-acting seat valve in A+B = J8

Compensator

for actuator port B (only with LVS08..3) = 4

for actuator ports A + B = 5

Spool type = A, D, F,J

Symbols and combinations, see section. 4.6

4.2 Accessories

Description Ordering code Data sheet

Plug for AMP Junior Timer with 2 metres of cable 100152575 -

Plug kit for AMP Junior Timer for DIY installation 100152579 -

Plug for Deutsch DT04-2P-EP04 with 2 metres of cable 100153209 -

Electrical joystick (demand-signal source) FGE 100-P-700051

Electronic controller for 1 axis + 1 on/off solenoid ELSK107 100-P-700033

Electronic controller for 2 axes ELSK208 100-P-700001

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4.3 Technical data

Unit On-off solenoid Proportional solenoid

Maximum flow rate l/min 50

Maximum inlet pressure bar 250

Maximum pressure at the actuator ports bar 280

Spool increments by actuator flow rates at 12 bar Δp l/min 6 (A), 10 (B), 16 (C), 25 (D), 32 (E), 40 (F), 50 (P)

Power consumption W 30 max. 30 at 2.5 A + 12 V

max. 30 at 1.25 A + 24 V

Current A 0.8 - 2.5 at 12 V

0.4 - 1.25 at 24 V

Duty cycle % 100% at 2.5 A + 12 V or 1.25 A + 24 V

Protection class IP65 (DIN 40050)

Standard configuration - compensator for actuator ports A + B, and A or B

- override pin

Options - anti-shock and make-up function for actuator ports A + B

or B only, adjustable or fixed setting

(cannot be combined with

seat valves)

- electrically oper. single-acting seat valves in A + B, or B only

- electrically op. double-acting seat valves in A + B, or B only

4.4 Pilot head

Proportional solenoid

with override pin and

starting point adjustment

A / B C / D

On/off solenoid

with override pin

4.5 Solenoid connector types

AMP Junior Timer Deutsch plug DT04-2P-EP04

4.6 Spool types and functions

4A 4D3J3A 4F

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4.7 Valve models, LVS08

Basic module Spool type Control type Description Bolt-on plate

option with code 00

LVS08..3J4....

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator port B

Seat valve in B

LVS08..3J4....A00B-*.

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator port B.

Anti-shock and/or

make-up valve for

actuator port B,

fixed setting or ad

justable

Seat valve in B

LVS08..3J4....A00B-J.

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator port B.

Electrically oper

ated seat valve for

actuator port B.

As single- or dbl-

acting seat valve

LVS08..3A4....A00B

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator port B

Seat valve in B

or Load-control

valve in B

LVS08..3A4....A00B-*.

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator port B.

Anti-shock and/or

make-up valve for

actuator port B,

fixed setting or ad

justable

Seat valve in B

LVS08..3A4....A00B-*#

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator port B.

Cavity prepared

and plugged, for

anti-shock and/or

make-up valve

Seat valve in B

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LVS08..3A4....A00B-J.

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator port B.

Electrically oper

ated seat valve for

actuator port B, as

single- or double-

acting seat valve

LVS08..4.5....A00B

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator ports A

and B

Seat valve or

Load-control valve

in A and B, or B

only

LVS08..4.5....A00B-*.

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator ports A +

Anti-shock and/or

make-up valve for

actuator port B,

fixed setting or ad

justable

Seat valve or

Load-control valve

in A and B, or B

only

LVS08..4.5....A00B-..

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator ports A +

Anti-shock and/or

make-up valve for

actuator ports A +

B, fixed setting or

adjustable

Seat valve or

Load-control valve

in A and B, or B

only

LVS08..4.5....A00B-##

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator ports A +

Cavity prepared

and plugged, for

anti-shock and/or

make-up valves

Seat valve or

Load-control valve

in A and B, or B

only

LVS08..4.5....A00B-J.

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator ports A +

B. Electrically op

erated seat valve

in actuator port B,

as single- or

double-acting seat

valve

LVS08..4.5....A00B-J.

RP LS

On/off solenoid

Proportional

solenoid

Compensator for

actuator ports A +

B. Electrically op

erated seat valve

in actuator ports A

+ B, as single- or

double-acting seat

valve

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4.8 Performance graphs

4.8.1 Control characteristics

Valve with proportional solenoid and 12 bar pressure drop

at the orifice

Q [l/min] = flow rate at the actuator outlet port

I [mA] = current at the proportional solenoids

50 l/min (P)

40 l/min (F)

25 l/min (D)

16 l/min (C)

10 l/min (B)

500 700 900 1100 1300 1500 1700 1900 2100 2300 I [mA] 12V

250 350 450 550 650 750 850 950 1050 1150 I [mA] 24V

Q [l/min]

4.9 Dimensions

LVS08......J21A00B-J4LVS08......J21A00B

282

187.5

G1/2”

136

119

311

87.5136

106

G1/2”

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5 Directional sections, LVS12

- hand lever operated

5.1 Ordering code

Spool function

3-way function = 3

4-way function = 4

3-way function (x2) = 6

LVS

Directional valve

Detent type

Detented position in B = B

Detented positions in A + B = R

Friction detent for A + B = D

Spring return (standard) = *

Port threads to DIN 3852 - Part 2

Actuator ports A and B G 3/4” = 22

Prepared for bolt-on plate = 00

Size = 12

4 A 5 M R * B

Pressure

setting

in bar

= ... bar

Flow rate in l/min

Actuator port A B

16 l/min = C = C

25 l/min = D = D

40 l/min = F = F

50 l/min = P = P

63 l/min = G = G

80 l/min = H = H

100 l/min = K = K

125 l/min = L = L

150 l/min = M = M

180 l/min = O = O

With 3-way function = *

0022KK12

Pilot head

Hand lever = M

Manual override, etc.

Spool-stroke limiter feature = F

Without = *

not in combination with Detented

Design stage

Options (see 9.1)

Anti-shock and make-up function

Actuator A = pos. 1, B = pos. 2

Without = *

Make-up valve = C

Anti-shock and make-up valve

- adjustable, 70-230 bar = A

- adjustable, 150-380 bar = B

- fixed setting

(values in bar)

25= D 32 =E 40 = F 50 = G 63 = H

80= I 100 =K 125 = L 140 = M 160 = N

175= O 190 =P 210 = Q 230 = R 250 = S

280= T 300 =U 330 = V 350 = W 380 = X

400= Y 420 =Z Cavity prepared = #

Compensator

for actuator ports A + B = 5

for actuator port A (only in conjunction with 3A) = 8

for actuator port B (only in conjunction with 3J) = 4

Spool type = A, D, J

Symbols and combinations, see section 5.4

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5.2 Technical data

Unit LVS12 - hand lever operated

Maximum flow rate l/min 180

Maximum inlet pressure bar 350 *

Maximum pressure at the actuator ports bar 400 *

Spool increments by actuator flow rates at 12 bar Δp l/min 16(C), 25(D), 40(F), 50(P), 63(G), 80(H), 100(K),

125(L), 150(M), 180(O)

Operating force on hand lever Nm 38

Standard configuration - compensator for actuator port A and/or B

Options - anti-shock and make-up function for actuator ports A and B

or B only, adjustable or fixed setting

- spool-stroke limiter feature

- detent or friction detent

* For inlet pressure < 300 bar and actuator pressure < 320 bar contact Bucher Hydraulics

5.3 Pilot head

End cover plate with

spool-stroke limiterHand lever

Standard end

cover plate

5.4 Spool types and functions

4A 4D3J3A

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5.5 Symbols

Basic module Description

RP LS

- the flow rate at the actuator outlet ports is varied - up to the

predefined maximum flow - by the position of the hand lever

- valve models, see section 9

5.6 Performance graphs

5.6.1 Control characteristics

Hand-lever operated valve with 12 bar pressure drop at the

orifice

Q [l/min] = flow rate at the actuator outlet port

s [%] = hand-lever way

Q [l/min]

100

120

140

160

180

0 25 50 75 100

s [%]

180 (O)

150 (M)

125 (L)

100 (K)

80 (H)

63 (G)

40 (F)

25 (D)

16 (C)

5.7 Dimensions

LVS12.....M*

19,5

265

G3/4”

121

138,5 142

28 28

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6 Directional sections, LVS12

- hydraulically operated

6.1 Ordering code

Spool function

3-way function = 3

4-way function = 4

3-way function (x2) = 6

LVS

Dir. valve section

Port threads to DIN 3852 - Part 2

Actuator ports A and B G 3/4” = 22

Prepared for bolt-on plate = 00

Size = 08 or 12

4 A 5 E * F B

Pressure

setting in bar

= ... bar

Flow rate in l/min

Actuator port A B

16 l/min = C = C

25 l/min = D = D

40 l/min = F = F

50 l/min = P = P

63 l/min = G = G

80 l/min = H = H

100 l/min = K = K

125 l/min = L = L

150 l/min = M = M

180 l/min = O = O

With 3-way function 3J = *

With 3-way function 3A = *

0022KK12

Pilot head

Hydraulic (standard) = E

Hydraulic (port horizontal) = I

Hydraulic (Duo head) = K

Hydraulic (Duo head + man. op.) = L

Spool-stroke limiter feature

Only in conjunction with control type E = F

Without = *

Design stage

Options (see 9.1)

Anti-shock and make-up function

Actuator A = pos. 1, B = pos. 2

Without = *

Make-up valve = C

Anti-shock and make-up valve

- adjustable, 70-230 bar = A

- adjustable, 150-380 bar = B

- fixed setting

(values in bar)

25= D 32 =E 40 = F 50 = G 63 = H

80= I 100 =K 125 = L 140 = M 160 = N

175= O 190 =P 210 = Q 230 = R 250 = S

280= T 300 =U 330 = V 350 = W 380 = X

400= Y 420 =Z Cavity prepared = #

Compensator

for actuator ports A + B = 5

for actuator port A (only with LVS12..3A) = 8

Spool type = A, D, F, J

Symbols and combinations, see section 6.5

6.2 Accessories

Description Ordering code Data sheet

Hydraulic joystick FGH 100-P-70029

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6.3 Technical data

Unit LVS12 - hydraulically operated

Maximum flow rate l/min 180

Maximum inlet pressure bar 350 *

Maximum pressure at the actuator ports bar 400 *

Spool increments by actuator flow rates at 12 bar Δp l/min 16(C), 25(D), 40(F), 50(P), 63(G), 80(H), 100(K),

125(L), 150(M), 180(O)

Pilot pressure bar 6 - 23

Standard configuration - compensator for actuator port A and/or B

Options - anti-shock and make-up function for actuator ports A and B

or B only, adjustable or fixed setting

- spool-stroke limiter feature

* For inlet pressure < 300 bar and actuator pressure < 320 bar contact Bucher Hydraulics

6.4 Pilot head and manual override

Standard Pilot port horizontal Duo head Spool-stroke

limiter

Manual override

E I K E + F L

6.5 Spool types and functions

6A (5) 6D (5)6A (4)

With compensator in A + B With compensator in B

4A 4D3J3A 4F

With compensator in A + B

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6.6 Symbols

Basic module Description

RP LS

- the flow rate at the actuator outlet ports is varied - up to the

predefined maximum flow - by the level of the pilot pressure

- valve models, see section 9

6.7 Performance graphs

6.7.1 Control characteristics

Hydraulically-operated valve with 12 bar pressure drop at

the orifice

Q [l/min] = flow rate at the actuator outlet port

p [bar] = pilot pressure

[l/

]

100

120

140

160

180

180 (O)

150 (M)

125 (L)

100 (K)

80 (H)

63 (G)

40 (F)

25 (D)

16 (C)

4 8 12 16 20 22

p [bar]

6.8 Dimensions

LVS12....5E.22*00B

230

130 50

119

106

28 28

G1/4”

27 27

G3/4”

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7 Directional sections, LVS12

- two-stage, proportional,

electro-hydraulic

7.1 Ordering code

Spool function

3-way function = 3

4-way function = 4

3-way function (x2) = 6

LVS

Dir. valve section

Plug type

AMP Junior Timer = J

Deutsch DT04-2P-EP04 = T

Port threads to DIN 3852 - Part 2

Actuator ports A and B G 3/4” = 22

Prepared for bolt-on plate = 00

Size = 12

4 A 5 F J * B

Pressure

setting in bar

= ....

Flow rate in l/min

Actuator port A B

16 l/min = C = C

25 l/min = D = D

40 l/min = F = F

50 l/min = P = P

63 l/min = G = G

80 l/min = H = H

100 l/min = K = K

125 l/min = L = L

150 l/min = M = M

180 l/min = O = O

With 3-way function 3J = *

With 3-way function 3A = *

0022KK12

Pilot head

Prop. electro-hyd. 12 V (standard) = F

Prop. electro-hyd. 24 V (standard) = G

Prop. electro-hyd. 12 V (horizontal) = T

Prop. electro-hyd. 24 V (horizontal) = U

Prop. electro-hyd. 12 V (rotated 180°) = V

Prop. electro-hyd. 24 V (rotated 180°) = W

Prop. electro-hyd. 12 V (Duo head) = R

Prop. electro-hyd. 24 V (Duo head) = S

Prop. electro-hyd. 12 V (Duo head + man. op.) = Y

Prop. electro-hyd. 24 V (Duo head + man. op.) = Z

Manual override, etc.

Override pin = A

Override pin + spool-stroke limiter = C

Without = *

Design stage

Anti-shock and make-up function

Actuator A = pos. 1, B = pos. 2

Without = *

Make-up valve = C

Anti-shock and make-up valve

- adjustable, 70-230 bar = A

- adjustable, 150-380 bar = B

- fixed setting

(values in bar)

25= D 32 =E 40 = F 50 = G 63 = H

80= I 100 =K 125 = L 140 = M 160 = N

175= O 190 =P 210 = Q 230 = R 250 = S

280= T 300 =U 330 = V 350 = W 380 = X

400= Y 420 =Z Cavity prepared = #

Compensator

for actuator ports A + B = 5

for actuator port A (only with LVS12..3A) = 8

Spool type

= A, D, F, J

Symbols and combinations, see section 7.6

Options (see9.1)

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7.2 Accessories

Description Ordering code Data sheet

Plug for AMP Junior Timer with 2 metres of cable 100152575 -

Plug kit for AMP Junior Timer for DIY installation 100152579 -

Plug for Deutsch DT04-2P-EP04 with 2 metres of cable 100153209 -

Electrical joystick (demand-signal source) FGE 100-P-700051

Electronic controller for 1 axis + 1 on/off solenoid ELSK107 100-P-700033

Electronic controller for 2 axes ELSK208 100-P-700001

7.3 Technical data

Unit LVS12 - 2-stage, proportional, electro-hydraulic

Maximum flow rate l/min 180

Maximum inlet pressure bar 350 *

Maximum pressure at the actuator ports bar 400 *

Spool increments by actuator flow rates at 12 bar Δp l/min 16(C), 25(D), 40(F), 50(P), 63(G), 80(H), 100(K),

125(L), 150(M), 180(O)

Nominal voltage V DC 12 or 24

Power consumption W max. 18 (at 1.5 A + 12 V or 0.75 A + 24 V)

Energising current A 0.6 - 1.5 at 12 V

0.3 - 0.75 at 24 V

Duty cycle % 100

Protection class IP65 (DIN 40050)

Standard configuration - compensator for actuator port A + B, and A or B

Options - anti-shock and make-up function for actuator ports A and B

or B only, adjustable or fixed setting

- spool-stroke limiter feature

* For inlet pressure < 300 bar and actuator pressure < 320 bar contact Bucher Hydraulics

7.4 Pilot head and manual override

Standard

Manual override

Duo head

Solenoid horizontal

Spool-stroke limiter

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7.5 Solenoid connector types

AMP Junior Timer Deutsch plug DT04-2P-EP04

7.6 Spool types and functions

6A (5) 6A (4)

With compensator in A + B With compensator in B

4A 4D3J3A 4F

6D (5)

With compensator in A + B

7.7 Symbols

Basic module Description

RP LS

- the pilot valves are internally supplied with pump pressure

The flow is varied - up to the predefined maximum flow - by

the proportional change in the electrical current.

- valve models, see section.9

7.8 Performance graphs

7.8.1 Control characteristic

Proportional, electro-hydraulically operated valve with

12 bar pressure drop at the orifice

Q [l/min] = flow rate at the actuator outlet port

I [mA] = current at the solenoids

100

120

140

160

180

500 600 700 800 900 1000 1100 1200 1300 1400

250 300 350 400 450 500 550 600 650 700

I [mA] 12V

I [mA] 24V

Q [l/min]

180 (O)

150 (M)

125 (L)

100 (K)

80 (H)

63 (G)

40 (F)

25 (D)

16 (C)

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7.9 Dimensions

LVS12....5FJ22*00B

130

230

119

150.5

G3/4”

19,5

151

8736

265

121

142

2828

59 73

117

G3/4”

LVS12....5YJ22*00B

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8 Directional sections, LVS12

- with digital pilot head

8.1 Ordering code

Spool function

3-way function = 3

4-way function = 4

3-way function (x2) = 6

LVS

Dir. valve section

Plug type

Deutsch DT 6 pole = T

Port threads to DIN 3852 - Part 2

Actuator ports A and B G 3/4” = 22

Size = 12

4 A 5 H T * B

Pressure

setting in bar

= ... bar

Flow rate in l/min

Actuator port A B

16 l/min = C = C

25 l/min = D = D

40 l/min = F = F

50 l/min = P = P

63 l/min = G = G

80 l/min = H = H

100 l/min = K = K

125 l/min = L = L

150 l/min = M = M

180 l/min = O = O

With 3-way function 3J = *

With 3-way function 3A = *

0022KK12

Pilot head

Digital pilot head = H

Digital pilot head + manual operation = P

Design stage

Anti-shock and make-up function

Actuator A = pos. 1, B = pos. 2

Without = *

Make-up valve = C

Anti-shock and make-up valve

- fixed setting

(values in bar)

25= D 32 =E 40 = F 50 = G 63 = H

80= I 100 =K 125 = L 140 = M 160 = N

175= O 190 =P 210 = Q 230 = R 250 = S

280= T 300 =U 330 = V 350 = W 380 = X

400= Y 420 =Z Cavity prepared = #

Compensator

for actuator ports A + B = 5

for actuator port A (only with LVS12..3A) = 8

Spool type

= A, D, F, J

Symbols and combinations, see section 8.6

Options (see 9.1)

8.2 Accessories

8.2.1 Analogue systems

Description Ordering code Data sheet

Electrical joystick (demand-signal source) FGE 100-P-700051

Plug set (contact pins and socket housing right and left) 100153228

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8.2.2 CAN bus systems

Description Ordering code Data sheet

Electrical joystick FCE/JS3 100-P-700051

Master board (parameterisation and service terminal) ELBE201 100-B-700016

Slave module ELMR201 ELMR201 100-P-700053

Plug (socket housing) DT16-6SA-K002, right 100153228

Cable harness for connecting the pilot heads in a valve block, 0.12 m 100153222

CAN terminating resistor (150 ohm) 100153223

Connecting lead for the valve block, 2 m 100153221

8.3 Description

In the digital pilot head (electro-proportional operation), an

electrical signal (demand signal) is amplified by using a pilot

oil flow that, in turn, moves the control spool in the directional

valve section. The position of the spool is detected by integ

ral position transducers and this actual value is compared

with the demand signal by the on-board electronics. By

varying the pilot flow, the position of the spool is adjusted to

correspond to the demand signal.

8.3.1 Advantages

Flexible

S Simple parameter changes

S Machine-specific configuration

S Easily extended

Cost-effective

S No adjustments during start-up

S Reduced cabling costs

S Simple, time-saving diagnostics

Coordinated system

S Integral sensors

S Proven, high-performance software

S Supported by application know-how

Safe

S Protection class IP67

S Sensors monitor the functionality

S Complies with safety regulations

8.3.2 On-board electronics

2 x Deutsch plugs, 6-pole

Fast-switch valves

Electronics card

Software (control system)

Spool-position sensor

Pressure sensor (optional)

Plug A

Plug B

8.3.3 Analogue systems

Functionality

S Analogue communication

S Each on-board electronic unit supplied by a separate con

trol cable

S Power supply can be connected serially from pilot head

to pilot head

S No interdependency between the individual valves

S Signal from spool-position sensor is available externally

if required

S Control signal 2.5 ±

Configuration via CAN bus interface

S Flow limiting

S Flow characteristic

S Changing the maximum flow

S Ramps (rate of rise/fall can be adjusted)

S Diagnostics via CAN bus

Plug pin layout

Plug A, left Plug A, right

1 = power signal 1 = Signal from spool-

position sensor

2 = Ground 2 = V

Reference

, 5V (20 mA)

3 = Ground

Reference

3 = Ground

4 = CAN low 4 = CAN low

5 = CAN high 5 = CAN high

6 = V

Battery

6 = V

Battery

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8.3.4 CAN bus systems

Functionality

S Communication via CAN bus interface and master board

S CAN bus and power supply are looped from pilot head to

pilot head

S Intelligent system control

S Signal from spool-position sensor (available externally if

required) analogue or CAN protocol

S Analogue sensor can be adapted

Communication via CAN bus

S Flow limiting

S Flow characteristic

S Ramps (rate of rise/fall can be adjusted)

S Diagnostics via CAN bus

S System intelligence

S Master board (parameterisation and service terminal)

Plug pin layout

Plug A, left Plug B, right

1 = not active 1 = signal from spool-

position sensor

2 = ground 2 = V

Reference

, 5V (20 mA)

3 = Ground

Reference

3 = ground

4 = CAN low 4 = CAN low

5 = CAN high 5 = CAN high

6 = V

Battery

6 = V

Battery

8.4 Technical data

Unit LVS12 with digital pilot head

Maximum flow rate l/min 180

Maximum inlet pressure bar 350 *

Maximum pressure at the actuator ports bar 400 *

Spool increments by actuator flow rates at 12 bar Δp l/min 16(C), 25(D), 40(F), 50(P), 63(G), 80(H), 100(K),

125(L), 150(M), 180(O)

Nominal voltage V DC 12 or 24

Power consumption W 7.2

Current A 0.6 at 12 V / 0.3 at 24 V

Duty cycle % 100

Protection class IP67 (DIN 40050)

Configuration options - flow limiting - flow characteristic

- changing the maximum flow

- ramps (rate of rise/fall can be adjusted)

- Diagnostics via CAN bus

Options - anti-shock and make-up function for actuator ports A + B

or B only, adjustable or fixed setting

Protection class maximum 10 units per cable harness for 24V, 6 units for 6V

* For inlet pressure < 300 bar and actuator pressure < 320 bar contact Bucher Hydraulics

8.5 Pilot head and manual override

Digital pilot head Manual override

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8.6 Spool types and functions

4A 4D3J3A 4F

8.7 Symbols

Basic module Description

R P LS Y

- the pilot valves are internally supplied with a reduced control

pressure of 30 bar max. The flow is varied - up to the predefined

maximum flow - by the proportional change in the electrical current.

- valve models, see section.9

8.8 Performance graphs

100

120

140

160

180

Q-Ver (l/min) / Q-Act (l/min)

2,5 4,5

0 100

Operated by a digital pilot head, with 12 bar pressure

drop at the orifice

Energising signal

180 (O)

150 (M)

125 (L)

100 (K)

80 (H)

63 (G)

40 (F)

25 (D)

16 (C)

8.9 Dimensions

LVS12....5HT22*00B

G3/4”

2828

11565

203

120

105

132

G3/4”

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9 Valve models for the LVS12 directional valve system

Model code and symbol Spool type Control type Description Bolt-on plate

with code 00

LVS12..3J4

RP LS

- hand lever

- hydraulic

- prop. electro-hyd.

- digital pilot head

Compensator for

actuator port B

Seat valve in B

(not for digital pilot

head)

LVS12

RP LS

- hand lever

- hydraulic

- prop. electro-hyd.

- digital pilot head

Compensator for

actuator port B

Anti-shock and/or

make-up valve for

actuator port B,

fixed setting or ad

justable

Seat valve in B

(not for digital pilot

head)

LVS12

RP LS

- hand lever

- hydraulic

- prop. electro-hyd.

- digital pilot head

Compensator for

actuator port B

Seat valve or

Load-control valve

in B

(not for digital pilot

head)

LVS12

RP LS

- hand lever

- hydraulic

- prop. electro-hyd.

- digital pilot head

Compensator for

actuator port B

Anti-shock and/or

make-up valve for

actuator port B,

fixed setting or ad

justable

Seat valve or

Load-control valve

in B

(not for digital pilot

head)

LVS12

RP LS

- hand lever

- hydraulic

- prop. electro-hyd.

- digital pilot head

Compensator for

actuator port B.

Cavity prepared

and plugged, for

anti-shock and/or

make-up valve

Seat valve or

Load-control valve

in B

(not for digital pilot

head)

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LVS12

RP LS

6A(4)

6A(5)

- hand lever

- hydraulic

- prop. electro-hyd.

- digital pilot head

- hydraulic

- prop. electro-hyd.

Compensator for

actuator port B

Seat valve or

Load-control valve

in A and B, or B

only

(not for digital pilot

head)

LVS12

RP LS

6A(4)

6A(5)

- hand lever

- hydraulic

- prop. electro-hyd.

- digital pilot head

- hydraulic

- prop. electro-hyd.

Compensator for

actuator ports A +

B. Anti-shock and/

or make-up valve

in actuator port B,

fixed setting or ad

justable

Seat valve or

Load-control valve

in A and B, or B

only

(not for digital pilot

head)

LVS12

RP LS

6A(4)

6A(5)

- hand lever

- hydraulic

- prop. electro-hyd.

- digital pilot head

- hydraulic

- prop. electro-hyd.

Compensator for

actuator ports A +

B. Anti-shock and/

or make-up valve

in actuator ports A

+ B, fixed setting

or adjustable

Seat valve or

Load-control valve

in A and B, or B

only

(not for digital pilot

head)

LVS12

RP LS

6A(4)

6A(5)

- hand lever

- hydraulic

- prop. electro-hyd.

- digital pilot head

- hydraulic

- prop. electro-hyd.

Compensator for

actuator ports A +

B. Cavity prepared

and plugged, for

anti-shock and/or

make-up valve

Seat valve or

Load-control valve

in A and B, or B

only

(not for digital pilot

head)

9.1 Options

Model code and symbol Description

LVS12......A02B

- threaded ports for external pilot pressure

For electrohydraulic control only

LVS12......A05B

- Pilot head, max. T-pressure = 200 bar

For electrohydraulic control only

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LVS12......A06B

- External poert for pilot pressure, actuater port A

- Port threads G1/4” , e. g. for load control valves

Only for control type elektrohydraulic

LVS12......A13B

- Tank notch control at actuator port A

LVS12......A14B

- Tank notch control at actuator port B

Specify pressure setting in bar at the end of the ordering code

LVS12......A15B

- Tank notch control at actuator port A and B

Specify pressure setting in bar at the end of the ordering code

LVS12......A39B

- No drop befor lift function

- Tank notch control at actuator port A and B

LVS12......A47B

- External poert for pilot pressure, actuater port A and B

- Port threads G1/4” , e. g. for load control valves

Only for control type elektrohydraulic

10 Intermediate sections

10.1 Functions

10.1.1 Pressure-reducing valve

The 3-way pressure-reducing valve holds the pressure at

the actuator port at a constant level, as set by the solenoid

current. Via the LS signal, this function can work with all

pressure compensators and pump systems.

10.2 Ordering code

Nominal voltage and plug type

12 Volt DC, AMP Junior Timer = FJ

3-way pressure-reducing valve = PDR

LVS PD -- Z - G1/ 2R

Port threads to DIN 3852 - Part 2

Actuator G1/2” = G1/2

A 00

Design stage

Intermediate section

Special feature

Functions

No auxiliary valve (Q

max.

40 l/min) = A

Seat valve on the actuator side

max.

25 l/min) = B

Seat valve on actuator side and

unloading valve (Q

max.

25 l/min) = C

A4 F

Pressure range 12 - 100 bar = 4

15 - 160 bar = 6

20 - 150 bar = 8

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10.3 Valve models

Model code and symbol Description

LVS-Z-PDRA

- threaded ports = G1/2”

LVS-Z-PDRB

- seat valve on actuator side

- threaded ports = G1/2”

10.4 Performance graphs

10.4.1 Adjustment ranges

3-way prop. pressure-control valve

I [A] = solenoid current

250

P [bar]

1,90 +10% I [A]12V

0,95 +10% I [A]24V

0,25 0,5 0,75

0,5 1,0 1,5

100

200

150

Pressure range 8

290-3600 PSI (20-250 bar)

Pressure range 6

220-2300 PSI (15-160 bar)

Pressure range 4

170-1450 PSI (12-100 bar)

Pressure range 2

110-580 PSI (8-40 bar)

10.4.2 Control characteristic as a function of flow

rate

250

200

150

30 10 10 30

p [bar]

40 20 0 20 40 Q [l/min]

100

50 50

P-P

10.4.3 Leakage in working position incl. pilot flow

Primary pressure [bar] 50 100 200 300

[cm

/min] 235 245 250 260

10.5 Dimensions

LVS-Z.PDRA-FJ-G12A00

135

67,531

G1/2”

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11 End sections

11.1 Functions

A valve block must by compleded with an end section.

11.2 Ordering code

Functions

No control function, no ports = CA*

LS - LS connection, R port = CAL

LS unloading = CB*

max

pressure relief (P1= ...) = CC*

LS unloading,

max

pressure relief (P1= ...) = CE*

Reduced pilot-pressure for internal

and external use

Pressure relief for the reduced pressure (P=...)

Pressure setting for the reduced pressure (P1= ...) = CS*

LVS CA -- A - G1 0 0L

Port threads to DIN 3852 - Part 2

R G1/2” = G1/2

R G3/4” = G3/4

R G1” = G100

Without threaded port = ****

A 00/

Design stage

End section

Options

Pressure

setting in bar

P = ... bar

P1 = ... bar

11.3 Valve models

Model code and symbol Description

LVS-A-CA*-****A00

- no control function

LVS-A-CAL-....A00

- threaded port for R

LVS-A-CB*-****A00

MLS

- LS unloading

threaded port for R

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LVS-A-CC*-****A00

MLS

-LS

max

pressure relief (P1= ...)

- threaded port for R

Specify pressure setting in bar at the end of the ordering code

LVS-A-CE*

MLS

-LS

max

pressure relief (P1= ...)

- LS unloading

- threaded port for R

Specify pressure setting in bar at the end of the ordering code

LVS-A-CS*

- reduced pilot-pressure for internal and external use

- pressure relief for the reduced pressure (P = ...)

- pressure setting for the reduced pressure (P1 = ...)

Specify pressure setting in bar at the end of the ordering code

11.4 Options

Model code and symbol Description

MR MLS

LVS-A-...-G..A07

- threaded ports for MR (G1/2”), MP and MLS (G1/4”)

PLSMP

LVS-A-...-G..A10

- threaded ports for P and R (G1”), MP and LS (G1/4”)

11.5 Dimensions

LVS12-A-CA*-****A00

133

135

M10

124

X [mm]

CA* 32

CAL 32

CB* 47

CC* 47

CE* 47

CS* 47

M10

135

199

67,5

35,75

LVS12-A-CS*-G34A00

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12 Bolt-on plates

12.1 General technical data

Unit Value

Inlet pressure bar 350

Nominal flow rate, load-control valve l/min LVS08 = 50, LVS12 = 120

Nominal flow rate, DVA and ZVA seat valves (LVS12 only) l/min 150

Nominal flow rate, PEC seat valves (LVS12 only) l/min 60

12.2 Functions

12.2.1 Load-control valves

These bolt-on load control valves, with integral anti-shock

function, ensure load-independent lowering motion at

speeds determined by the inlet flow, with leak-free shut-off

when the directional valve is in its neutral position. The anti-

shock valve setting should preferably be between 100%

and 200% of the highest load pressure. Turning the adjust

ing screw in the clockwise direction reduces the setting, and

this can also be used for emergency lowering of the load.

12.2.2 Seat valves (pilot operated check valves)

Seat valves with electrical override shut off the actuator

lines with zero leakage.

Directional valve must carry code 00, see box port threads

in ordering code

12.2.3 Seat valves with anti-shock/make-up vv.

(overrideable check valves with pressure

relief on the actuator side)

Bolt-on seat valves with service line anti-shock/make-up

valves shut off the actuator lines with zero leakage and pro

tect the actuator from unacceptably large pressure peaks.

12.3 Ordering code

12.3.1 Load-control valves

LVS S3 -- 0

Port threads

to DIN 3852 - Part 2

G1/2” (max. 60 l/min) = 21

G3/4” (max. 120 l/min) = 22

A 00

Design stage

Bolt-on plate

with load-control valves

Options

Actuator port A

Load-control valve

- with pilot ratio 3 : 1 = S30

- without = ***

PBH S3- 0

Actuator port B

Load-control valve

- with pilot ratio 3 : 1 = S30

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12.3.2 Seat valves

LVS DV -- A

Port threads

to DIN 3852 - Part 2

G1/2” (max. 60 l/min) = 21

G3/4” (max. 120 l/min) = 22

A 00

Design stage

Bolt-on plate

with seat valves

Options

Actuator port A

Seat valve with electrical override

- single-acting seat valve = DVA

- double-acting seat valve = ZVA

- without = ***

PRE -

DV B 21

Actuator port B

Seat valve with electrical override

- single-acting seat valve = DVB

- double-acting seat valve = ZVB

Nominal voltage

and plug type

12 Volt DC

and AMP Junior Timer = J12

24 Volt DC

and AMP Junior Timer = J24

12.3.3 Seat valves, pressure-relief/make-up check

valve

LVS --

Port threads to DIN 3852 - Part 2

G1/2” (max. 60 l/min) = 21

A 02

Design stage

Bolt-on plate

Actuator port A

Pressure-relief and make-up check valve

- press. setting e.g. 210 bar

= 210

- make-up check valve only = NVO

- without = ***

PEC -

160 160 21

Nominal voltage

and plug type

12 Volt DC

and AMP Junior Timer = J12

24 Volt DC

and AMP Junior Timer = J24

Seat valves

with electrical override

Sgl-act. seat valves in A+B = 00

Dbl-act. seat valves in A+B = 02

Actuator port B

Pressure-relief and make-up check valve

- press. setting e.g. 210 bar

= 210

- make-up check valve only = NVO

1) Pressure settings in bar available for the pressure-relief function (measured at 10 l/min test flow) 25, 32, 40, 50, 63, 80, 100, 125, 140, 160, 175, 190, 210,

230, 250, 280, 300, 330, 350 (for other pressures, consult BUCHER)

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12.4 Valve models

Model code and symbol Description

LVSPRA-***-DVB

Dir,

valve

- seat valve with electrical override (check valve) in actuator port B

LVSPRE-DVA-DVB

Dir,

valve

- seat valve with electrical override (check valve) in actuator ports

A and B

LVSPEC-...-...-21-J..A00

Dir,

valve

- seat valve with electrical override with service line anti-shock/

make-up valves (overrideable check valve and pressure relief

on the actuator side) in actuator ports A and B

LVSPBH-***-S30

Dir,

valve

- load-holding valve in actuator port B

LVSPBH-S30-S30

Dir,

valve

- load-holding valve in actuator ports A and B

12.5 Options

Model code and symbol Description

LVSPRE-....A01

- Float function

- Orifice Ø 5

12.6 Dimensions

LVSPEC

230

348

174

23,5

G1/2”G1/2”

130

114,45

23,5

G1/2”

LVSPBH-S30-S30-21A00

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13 Accessories

13.1 Assembly kit

To assemble the individual valve sections with assured

functional reliability, 3 tie bolts and hex. nuts are necessary.

Tightening torque = max. 32 Nm in 3 steps (6, 16 and 32

Nm)

13.1.1 Ordering code

3 pcs. tie bolt M10 x ...... (required length in mm)

3 pcs. hex. nut M10, Part No.: 100243580

3248

48 48

Calculating the tie bolt length:

15 mm + (48 mm x no. of directional valve sec

tions) + width of the end section + 20 mm

Example:

15 + (48x3) + 32 +20 = 211 mm

For ordering purposes, always round up the

calculated tie bolt length to the next 10 mm.

In our example, we therefore need to order 3

pcs of tie bolt with 220 mm.

IMPORTANT: maximal 10 directional sections in one valve block

13.2 Pipe fittings and orifices

Model code Description

Order nomber:

100116329

- Pipe fitting G1/4” for use with max. two orifices M5

(TN3001, Form B)

Application: dampening LS signal for system stabilisation

- Orifice : Ø 0,5 = 100219282

Ø 0,6 = 100209791

Ø 0,8 = 100216052

Ø 1,0 = 100225419

E 2012 by Bucher Hydraulics GmbH, D-79771 Klettgau

www.bucherhydraulics.cominfo.kl@bucherhydraulics.com

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: 430.300.330.