1. System with fixed pump Constant Flow Open Centre System “CFO”
Spool in neutral
Activated spool
Max.
Pump
Flow
200 bar
100 bar
50 bar
“METER
IN”
LIFTING
“METER
OUT”
LOWERING
50 bar
100 bar
200 bar
100 %
Spool travel
Typical flow characteristic
Manually controled valve
Constant Flow Open Centre System “CFO”

2. Typical flow characteristic Manual controlled valve
System with variable pump
Spool in mid position
Activated spool
Typical flow characteristic
Manual controlled valve
100 %
Spool travel
Max.
Pump
Flow
“METER
OUT”
LOWERING
IN”
LYFTING
200 bar
100 bar
50 bar
Load-sensing system “LS”
Closed Centre Valve

3. System with fixed pump and LS valve
L90LS
valve
F1 +
pump
Constant Flow Closed center system “CFC”

4. THREE FUNCTIONS WITHOUT INDIVIDUAL PRESSURE COMPENSATORS
System with fixed pump and LS valve 50
210
100
200
THREE FUNCTIONS WITHOUT INDIVIDUAL
PRESSURE COMPENSATORS

5. PRESSURE COMPENSATOR INDIVIDUAL COMPENSATOR WITH
PILOT
STAGE
INDIVIDUAL COMPENSATOR WITH
PRESSURE REDUCTION FUNCTION
OR FEED REDUCTION FUNCTION

6. THREE FUNCTION WITH INDIVIDUAL PRESSURE COMPENSATORS
System with fixed pump and LS valve 50 56
6 BAR
210
106
100
206
200
THREE FUNCTION WITH INDIVIDUAL
PRESSURE COMPENSATORS

7. Systems with fixed pump ”CFO”
Energy comparison in systems
Systems with fixed pump ”CFO”
Systems with variable pump ”LS”
P pressure
P pressure
Q flow
Q flow

8. Very suitable for ”LS” systems Great demands for manoeuvrability
Applications well suited for ”LS”
Very suitable for ”LS” systems
Great demands for manoeuvrability
Arial lift
Forest machine
Excavator
Backhoe loader
Refuse collector
Large wheel loader
Hook loader
Great demands for
productivity

9. System with variable pump and LS
Suitable when;
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

10. Save energy, design advises
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.

11. LS - Valve Range

12. 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

13. L90LS CFC-systems Pump unloading inlet 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

14. L90LS Applications Customers Forest machines Articulated truck cranes
Fork lifts
Excavators
Refuse vehicles
Skip loaders
Drill rigs
Customers
SISU Logging
F Weyhausen
Schaeff
Atlas Copco
Pel Job

15. K170LS/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

16. K170LS/K220LS LS-systems Built-in main & port relief valves
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

17. K170LS/K220LS Applications Forest machines Excavators Backhoe loaders
Reach stackers
Wheel loaders
Fork lifts
Customers
Timberjack
Volvo
Barko
Ponsse
Kalmar LMV

18. 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

19. 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

20. HV08 Applications Customers Reach stackers Articulated dump trucks
Mobile cranes
Forest machines
Customers
Volvo
Kalmar LMV
SMV
Lansing

21. 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

22. M400LS LS-systems Built-in port relief valves 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

23. M400LS Applications Customers Wheel loaders Reach stackers
Mobile cranes
Forest machines
Excavators
Customers
Volvo
Ljungby Machine
Luna

24. CFC INLET SECTION + SPOOL SECTION
L90LS T
L.S. P
COMPENSATOR
(K)
DIRECTION
CONTROL
SPOOL
LOGIC
CHECK
VALVE
INDIVIDUAL
PRESSURE
REDUCTION
FUNCTIONS A B
BYPASS
RELIEF
FUNCTION
EMERGENCY
STOP (BEN)
CFC INLET SECTION + SPOOL SECTION

25. L90LS Inlet section Inlet Compensator, Emergency Stop FunctionPX PL
Inlet Compensator, Emergency Stop Function
and Main Relief Valve With Pilot Assembly

26. L90LS LS2 Inlet Section Showing Direct Acting Fixed
Setting Relief Valve Cartridge

27. LS1 Inlet Section Showing Copy
L90LS
PILOT
STAGE
MAIN
STAGE B A T T
COMPENSATOR
(K)
DIRECTION
CONTROL
SPOOL
INDIVIDUAL
PRESSURE
REDUCTION
FUNCTIONS
COPY
SPOOL
L.S.
LOGIC
CHECK
VALVE
L.S. P P
P.X.
L.S.
P.L.
LS1 Inlet Section Showing Copy
Spool Function

28. Inlet Section Showing Copy Spool Function
L90LS LS PX PL
Inlet Section Showing Copy Spool Function

29. L90LS Single Spool Valve EC OperatedB PS T
L.S. P
L.S.P. P2 TP MP T3
COUNTER PRESSURE
VALVE
Single Spool Valve EC Operated
Showing Service Line Relief / Anti- cavitation Cartridges &
Counter-pressure valve in Outlet Section

30. L90LS Outlet Section
T2/MP T3 TP PS
LSP
Outlet Section Showing Pressure Reducing For Pilot Supply
and Counterpressure Valve

31. Load sense valve LS and/or CFC
L90LS
Load sense valve LS and/or CFC
Spool in neutral position

32. Load sense valve LS and/or CFC
L90LS
Load sense valve LS and/or CFC
Spool in outer position
*PBAT = Pump to motorport B. Motorport A to tank.

33. Metering to Motor Port Versus Spool Stroke
L90LS 25 50 75
100 20 40 60 80
100%
FLOW (LPM)
SPOOL STROKE
Metering to Motor Port Versus Spool Stroke

34. DIFFERENTIAL PRESSURE ( Bar )
L90LS 20 40 60 80
100
200
300
FLOW (LPM)
DIFFERENTIAL PRESSURE ( Bar )
Performance of Individual Compensator Against
Differential Pressure from Valve Inlet to Motor Port

35. with pressure feedback on B-side
L90LS
Load sense valve LS and/or CFC
with pressure feedback on B-side
*PBAT = Pump to motorport B. Motorport A to tank.

36. Load sense valve LS and/or CFC
L90LS
Load sense valve LS and/or CFC
with LS-logic
*PBAT = Pump to motorport B. Motorport A to tank.

37. Two spool valve with M10 manifold
L90LS T
L.S. P PS T2
L.S.P. P2 T3 TP A B
Two spool valve with M10 manifold

38. L90LS
M10 Manifold Section

39. L90LS FEATURE ADVANTAGE BENEFIT 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.
LOWER OVERALL COST.
IMPROVED SAFETY.
IMPROVED RELIABILITY.
PRESSURE
COMPENSATION.
SIMPLE SYSTEM DESIGN
& ASSEMBLY.
INDIVIDUAL MAX.
SPEEDS.
NO INTERFERENCE
BETWEEN FUNCTIONS.
FEED REDUCER
EASY TO SET DIFFERENT
FORCE LEVELS.
EASILY INSTALLED
INCREASED EFFICIENCY.
SAFER OPERATION.
LOWER INSTALLATION COST

40. L90LS FEATURE ADVANTAGE BENEFIT LESS RISK OF CAVITATION
FORCE CONTROL
IMPROVED STABILITY & SAFETY
LESS WEAR &
GREATER EFFICIENCY.
LOWER RUNNING COSTS.
MORE GENTLE
MACHINE
CHARACTERISTICS .
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 CAVITATION
SIMPLY TO INSTALL.
ENABLES UNLOADED
LOWERING.
IMPROVED MACHINE PERFORMANCE.
LESS RISK OF CYLINDER OR MOTOR
DAMAGE.
IMPROVED FUEL ECONOMY
PROVISION FOR
EXTERNAL
PILOT FILTER
GREATER FLEXIBILITY.
EASIER TO KEEP PILOT
SYSTEM COMPLETELY
CLEAN.
IMPROVED RELIABILITY.
LOWER INSTALLATION
COST
FAST ACTING
LEAK TIGHT
PORT
RELIEF VALVES
FUNCTION
ADAPTED
SPOOLS
EASY TO OPTIMISE
PERFORMANCE WITH
FEWER COMPONENTS
IMPROVED
CONTROLLABILITY,
SAFETY & RELIABILITY.
PILOT PRESSURE
SUPPLY.
SIMPLE SYSTEM
ASSEMBLY.
COST.