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Mobile Controls Division 18/04/23
Constant Flow Open Centre System “CFO”
Spool in neutral Activated spool
Typical flow characteristicManually controled valve
200
bar
200
bar
100
bar
50 b
ar10
0 ba
r
50 b
ar
100 %Spool travel
Max.PumpFlow
“METEROUT”
LOWERING
“METERIN”
LIFTING
System with fixed pump
Mobile Controls Division 18/04/23
200
bar
100
bar
50 b
ar
System with variable pump
Load-sensing system “LS”Closed Centre Valve
Spool in mid position Activated spool
Typical flow characteristicManual controlled valve
100 %Spool travel
Max.PumpFlow
“METEROUT”
LOWERING
“METERIN”
LYFTING
Mobile Controls Division 18/04/23
F1 +pump
L90LSvalve
Constant Flow Closed center system “CFC”
System with fixed pump and LS valve
Mobile Controls Division 18/04/23
THREE FUNCTIONS WITHOUT INDIVIDUALPRESSURE COMPENSATORS
50
210
210 210
210
100
210
200
200
210
50 100 200
210
System with fixed pump and LS valve
Mobile Controls Division 18/04/23
INDIVIDUAL COMPENSATOR WITHPRESSURE REDUCTION FUNCTIONOR FEED REDUCTION FUNCTION
PILOTSTAGE
PRESSURE COMPENSATOR
Mobile Controls Division 18/04/23
THREE FUNCTION WITH INDIVIDUALPRESSURE COMPENSATORS
50
56
6 BAR
210
6 BAR
210
106
100
6 BAR
210
206
200200
210
50 100 200
System with fixed pump and LS valve
Mobile Controls Division 18/04/23
Systems with fixed pump ”CFO”
P pressure
Systems with variable pump ”LS”
P pressure
Q flow Q flow
Energy comparison in systems
Mobile Controls Division 18/04/23
Great demands for manoeuvrability
Arial lift
Very suitable for ”LS” systems
Applications well suited for ”LS”
Great demands for productivity
Forest machineExcavatorBackhoe loader
Hook loaderRefuse collectorLarge wheel loader
Mobile Controls Division 18/04/23
When partial pump flow is used for individual functions
At high intensity usage To create simple system solutions when a number
of functions with different flow rates is demanded When system layout is spread out At simultanious operation of functions Power control and energy conservation Reduce energy losses at idling and transportation
Suitable when;Suitable when;
System with variable pump and LS
Mobile Controls Division 18/04/23
Avoid to mix light and heavy loads from the same pump. Avoid to mix large and small flow demands from the same fixed
pump. Never control max flow with line mounted restrictors. Always use the pump regulator to set maximum work pressure
when you are using a variable pump. The pressure limiter of the valve needs to be set at least 30 bars above.
Avoid to limit valve work port pressure with the chock valves, use the build in individual work port feed reducer.
Make sure that the cylinders are correctly connected to the valve, the valve is normally adapted to the cylinder ratio.
Save energy, design advises
Mobile Controls Division 18/04/23
100
M400
HV08 LS
K220LS
L90LS
400 500 600200 300Flow l/min
0
250-600
150-350
100-250
50-130
For systems For systems withwith variable variable displacementdisplacement pumps pumps
LS - Valve Range
Mobile Controls Division 18/04/23
L90LS
Features Emergency stop Individual pressure compensators Feed reducers Force control Fast acting leake tight port relief valves Counter pressure valve Built-in pilot pressure supply Wide range of spool-actuators Wide range of function adapted spools Copied load signal Fixed or variable pump
Mobile Controls Division 18/04/23
CFC-systems
LS-systems
Flow/section 90 l/min, without compensator 130 l/min
Nodular iron
Max pressure 320 bar
Stackable 1 to 10 sections
Service ports G1/2 7/8” - 14UN
Two speed control
Lever release function
Pump unloading inlet
Built-in main & port relief valves
Built-in feed reducers
Copy spool function
Function manifolds
Spool actuators manual pneumatic prop & on-off hydraulic electro-hydraulic prop & on-
off
Pressure compensators
Application adapted spools
L90LS
Mobile Controls Division 18/04/23
L90LS
Applications Forest machines Articulated truck
cranes Fork lifts Excavators Refuse vehicles Skip loaders Drill rigs
Customers SISU Logging F Weyhausen Schaeff Atlas Copco Pel Job
Mobile Controls Division 18/04/23
K170LS/K220LSK170LS/K220LS
Features Individual pressure
compensators Feed reducers Force control Fast acting leak tight port
relief valves Counter pressure valve Built-in pilot pressure supply Wide range of function adapted
spools Copied load signal Intermediate sections Mid-inlet
Mobile Controls Division 18/04/23
K170LS/K220LS/K220LS
LS-systems
Flow/section 170 l/min, without compensator 210 l/min
Nodular iron
Max pressure 320 bar
Stackable 1 to 10 sections
Motorports G3/4 1 1/16” - 12UN SAE 1”
Built-in main & port relief valves
Built-in feed reducers
Copy spool function
Spool actuators hydraulic electro-hydraulic prop &
on-off
Pressure compensators
Application adapted spools
Intermediate sections
Mobile Controls Division 18/04/23
K170LS/K220LS/K220LS
Applications
Forest machines Excavators Backhoe loaders Reach stackers Wheel loaders Fork lifts
Customers Timberjack Volvo Barko Ponsse Kalmar LMV
Mobile Controls Division 18/04/23
HV08
Features Optional unloading valve in the
inlet section Flow force pressure
compensation Feed reducers Force control Fast acting leak tight port relief
valves Counter pressure valve Wide range of function adapted
spools Copied load signal Anti-priority function
Mobile Controls Division 18/04/23
HV08
CFC-systems
LS-systems
Max flow/section 320 l/min
Grey & nodular iron
Max pressure 320 bar
Stackable 1 to 6 sections
Service ports SAE 1”
Built-in main & port relief valves
Built-in feed reducer
Copy spool function
Spool actuators manual pneumatic prop & on/off hydraulic electro-hydraulic prop &
on-off
Application adapted spools
Anti priority function
Mobile Controls Division 18/04/23
HV08
Applications Reach stackers Articulated dump
trucks Mobile cranes Forest machines
Customers Volvo Kalmar LMV SMV Lansing
Mobile Controls Division 18/04/23
M400LS
Features Poppet design
zero leakage not sensitive to
temperature shocks Fast acting leak-tight port
relief valves Counter pressure valve Function adapted spools Low pressure drops
high function speed low energy consumption
Priority function Easy to install Dual cylinder ports
Mobile Controls Division 18/04/23
M400LS
LS-systems
Flow/section 450 l/min
Nodular iron
Max pump pressure 300 bar
Max service port pressure 400 bar
Monoblock 2-section
Connections Pump, 2 x 1 1/4 “ Tank, 1 x 1 1/2” Service ports, 8 x 1”
Built-in port relief valves
Built-in counter pressure valve
Spool actuators PC FPC
Built-in pressure-controlled float position function
Priority function
Poppet-valve concept
Application adapted spools
Mobile Controls Division 18/04/23
M400LS
Applications Wheel loaders Reach stackers Mobile cranes Forest machines Excavators
Customers Volvo Ljungby Machine Luna
Mobile Controls Division 18/04/23 24
EMERGENCYSTOP (BEN)
CFC INLET SECTION + SPOOL SECTION
T
L.S.
P
COMPENSATOR(K)
DIRECTIONCONTROLSPOOL
L.S.LOGICCHECKVALVE
INDIVIDUALPRESSUREREDUCTIONFUNCTIONS
T
L.S.
P
AB
BYPASSVALVE
RELIEFFUNCTION
L90LS
Mobile Controls Division 18/04/23 25
Inlet Compensator, Emergency Stop Function and Main Relief Valve With Pilot Assembly
LS
PX
PL
P1 T1
L90LS Inlet section
Mobile Controls Division 18/04/23 26
LS2 Inlet Section Showing Direct Acting FixedSetting Relief Valve Cartridge
L90LS
Mobile Controls Division 18/04/23 27
T
L.S.
P
COMPENSATOR(K)
DIRECTIONCONTROLSPOOL
L.S.LOGICCHECKVALVE
INDIVIDUALPRESSUREREDUCTIONFUNCTIONS
T
L.S.
P
AB
MAINSTAGE
PILOTSTAGE
P.L.P.X.
LS1 Inlet Section Showing CopySpool Function
COPYSPOOL
L90LS
Mobile Controls Division 18/04/23 28
Inlet Section Showing Copy Spool Function
LS
PX
PL
L90LS
Mobile Controls Division 18/04/23 29
Single Spool Valve EC OperatedShowing Service Line Relief / Anti- cavitation Cartridges &
Counter-pressure valve in Outlet Section
A B PS
T
L.S.
P
L.S.P.P2
TP
MPT3
COUNTER PRESSUREVALVE
L90LS
Mobile Controls Division 18/04/23 30
T3
T2/MP
TP
PS
LSP
Outlet Section Showing Pressure Reducing For Pilot Supplyand Counterpressure Valve
L90LS Outlet Section
Mobile Controls Division 18/04/23
Load sense valve LS and/or CFC
Spool in neutral position
L90LS
Mobile Controls Division 18/04/23
Load sense valve LS and/or CFC Spool in outer position
*PBAT = Pump to motorport B. Motorport A to tank.
L90LS
Mobile Controls Division 18/04/23 33
25
50
75
100
0
20 40 60 80 100%
FL
OW
(L
PM
)
SPOOL STROKE
Metering to Motor Port Versus Spool Stroke
L90LS
Mobile Controls Division 18/04/23 34
20
40
60
80
100
0
0 100 200 300
FL
OW
(L
PM
)
DIFFERENTIAL PRESSURE ( Bar )
Performance of Individual Compensator AgainstDifferential Pressure from Valve Inlet to Motor Port
L90LS
Mobile Controls Division 18/04/23
Load sense valve LS and/or CFCwith pressure feedback on B-side
*PBAT = Pump to motorport B. Motorport A to tank.
L90LS
Mobile Controls Division 18/04/23
*PBAT = Pump to motorport B. Motorport A to tank.
Load sense valve LS and/or CFC
with LS-logic
L90LS
Mobile Controls Division 18/04/23 37
T
L.S.
P
PS
T2
L.S.P.
P2T3
TP
A B A B
Two spool valve with M10 manifold
L90LS
Mobile Controls Division 18/04/23 38
M10 Manifold Section
L90LS
Mobile Controls Division 18/04/23 39
FEATUREFEATURE ADVANTAGEADVANTAGE BENEFITBENEFIT
STACKABLE
VALVE.FLEXIBILITY.
EASIER TO INSTALL.CHEAPER TO SERVICE.
MODULAR
CONSTRUCTION.
SIMPLIFICATION
FEWER EXTERNAL
COMPONENTS.
RELIABILITY.EASIER TO INSTALL SYSTEM.
LOAD SENSING
WITH
VARIABLE PUMP.
SIMPLE DESIGN
HIGHER MACHINE
PERFORMANCE.
HIGHER
WORKING CAPACITY.
BETTER FUEL ECONOMY.
OPTIMISED PERFORMANCE.
EASIER TO RETROFIT OTHER FUNCTIONS
EMERGENCY
STOP.
EASIER TO MEET
EC DIRECTIVES.
EASIER TO INSTALL.
LOWER OVERALL COST.
IMPROVED SAFETY.
IMPROVED RELIABILITY.
PRESSURE
COMPENSATION.
SIMPLE SYSTEM DESIGN& ASSEMBLY.INDIVIDUAL MAX.
SPEEDS.
NO INTERFERENCE
BETWEEN FUNCTIONS.
FEED REDUCEREASY TO SET DIFFERENT
FORCE LEVELS.EASILY INSTALLED
INCREASED EFFICIENCY.
SAFER OPERATION.
LOWER INSTALLATION COST
L90LS
Mobile Controls Division 18/04/23 40
FEATUREFEATURE ADVANTAGEADVANTAGE BENEFITBENEFIT
FORCE CONTROL
IMPROVED STABILITY & SAFETYLESS WEAR & GREATER EFFICIENCY.LOWER RUNNING COSTS.
MORE GENTLE MACHINECHARACTERISTICS
.
PREVENTS HIGH PEAK PRESSURES. PORT RELIEF’S CAN BE SET CLOSE TO MAX. WORKING PRESSURE.
LESS STRESS ON MACHINE COMPONENTS.IMPROVED RELIABILITY..
COUNTER -PRESSURE VALVES
LESS RISK OF CAVITATIONSIMPLY TO INSTALL.ENABLES UNLOADED LOWERING.
IMPROVED MACHINE PERFORMANCE. LESS RISK OF CYLINDER OR MOTORDAMAGE. IMPROVED FUEL ECONOMY
PROVISION FOREXTERNALPILOT FILTER
GREATER FLEXIBILITY.EASIER TO KEEP PILOTSYSTEM COMPLETELYCLEAN.
IMPROVED RELIABILITY.LOWER INSTALLATION COST
FAST ACTINGLEAK TIGHTPORTRELIEF VALVES
FUNCTIONADAPTEDSPOOLS
EASY TO OPTIMISE MACHINEPERFORMANCE WITH
FEWER COMPONENTS
IMPROVEDCONTROLLABILITY,SAFETY & RELIABILITY.
PILOT PRESSURE
SUPPLY.
SIMPLE SYSTEMASSEMBLY.
FEWER COMPONENTS
LOWER INSTALLATIONCOST.
IMPROVED RELIABILITY.
L90LS