L90LS
Mobile Directional Control Valve
Proportional, Load Sensing, Pre-compensated
2
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Catalogue Information
Catalogue layout
In addition to general information and basic technical data, this
catalogue contains descriptions of the many optional functions
you can specify for the L90LS, so that we may customize it to
control your machine optimally.
Each function area of the valve is given as a subheading,
followed by a brief description. When different options are avail-
able for a function area, the subheading is followed by an item
number in square brackets, e.g. Pressure relief valve [16].
This is followed by a series of coded options, e.g. PA1, PS, Y,
together with a brief description of what each code represents.
Alternatively, one or more pressure, flow or voltage options are
given.
On page 9 is a general circuit diagram, which shows the
basic function areas of the L90LS, as well as the item numbers
that represent them. The same item numbers are of course used
in all sub-circuit diagrams elsewhere in the catalogue. Please
note that, unless stated otherwise, all sections and views of the
valves have been drawn as seen from the inlet section .
Computer-aided valve specification
We have developed a computer program to specify the L90LS
on the basis of the criteria for each individual machine function.
The program facilitates optimal configuration of the valve for
maximum performance in different applications. It also gener-
ates documentation in the form of a detailed specification and
hydraulic circuit diagram for your valve, as well as a unique ID
number that is stamped into the valve data plate. Your valve
specifications are then stored on our database to facilitate rapid
identification in the event of service enquiries or re-ordering.
Conversion factors
1 kg = 2.2046 lb
1 N = 0.22481 lbf
1 bar = 14.504 psi
1 l = 0.21997 UK gallon
1 l = 0.26417 US gallon
1 cm
3
= 0.061024 in
3
1 m = 3.2808 feet
1 mm = 0.03937 in
9/5 °C + 32 = °F
Early consultation with Parker saves
time and money
Our experienced engineers have in-depth knowledge of different
types of hydraulic system and the ways in which they work. They
are at your disposal to offer expert advice on the best system
for the desired combination of machine functions, control char-
acteristics and economic criterie. By consulting Parker early in
the project planning stage, you are assured of a comprehensive
hydraulic system that gives your machine the best possible oper-
ating and control characteristics.
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS
CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE.
This document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors provide
product or system options for further investigation by users having technical expertise.
The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components
and assuring that all performance, endurance, maintenance, safety and warning requirements of the application are met. The
user must analyze all aspects of the application, follow applicable industry standards, and follow the information concerning
the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized
distributors.
To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or
specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and
sufficient for all applications and reasonably foreseeable uses of the components or systems.
Offer of Sale
Please contact your Parker representation for a detailed ”Offer of Sale”.
WARNING – USER RESPONSIBILITY
Parker reserves the right to modify products without prior notice.
Typical curves and diagrams are used in this catalogue.
Even though the catalogue is revised and updated continuously,
there is always the possibility of errors. For more detailed
information about the products, please contact Parker Hannifin.
3
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Contents
Contents Page
General Information ............................................................................................................. 4
Load sensing systems, LS ................................................................................................... 5
Technical Data .................................................................................................................. 6-7
Hydraulic circuits .............................................................................................................. 8-9
Inlet sections [15] ............................................................................................................... 10
Pressure relief valve [16] ............................................................................................. 14
Pressure setting [17] .................................................................................................... 15
Differential pressure limiter, PLS [18] .......................................................................... 15
Load signal system [20] ............................................................................................... 16
Pump-unloading function [22] ...................................................................................... 17
Tank connection T1 [25] ............................................................................................... 17
Pump connection P1 [26] ............................................................................................ 17
End section [30] ................................................................................................................ 18
LS connection [31] ...................................................................................................... 19
Pump connection P2 [32] ............................................................................................ 19
Counter pressure valve / tank connection T2 [33] ....................................................... 19
Tank connection T3 [34] ............................................................................................... 19
Internal-pilot pressure supply [37] ............................................................................... 19
Pilot filter [39] ............................................................................................................... 20
Tank connection for pilot circuit [40]............................................................................. 20
Spool Section .................................................................................................................... 21
Basic variants of spool section [47] ............................................................................. 21
Material of spool section [48] ....................................................................................... 21
Spool actuators [50] ..................................................................................................... 22
Directly operated actuators, with open spool-end ................................................. 22
ON/OFF remote-controlled actuators, with open spool-end .................................. 23
Remote-controlled actuators, proportional spool actuators with open spool-end .. 23
Lever brackets [51] ................................................................................................ 23
Directly operated actuators with enclosed spool-ends .......................................... 24
Proportionally remote-controlled actuators, with enclosed spool-ends ............ 25-27
Connector types [56] ............................................................................................. 27
Lever bracket [51] .................................................................................................. 28
Pilot restrictor [55 A, B] .......................................................................................... 28
Spool function [60] ................................................................................................. 29
Flow requirements [61 A, B] .................................................................................. 29
Spool symbols ....................................................................................................... 29
Choice of spool ............................................................................................................ 29
Area ratios [62] ...................................................................................................... 30
Load characteristics [63]........................................................................................ 30
Force feedback [64 A, B] ....................................................................................... 30
Pressure compensator / load-hold check valve [66] .............................................. 31
Damping of pressure compensator [67] ................................................................ 31
Spool designations [69] ......................................................................................... 31
Flow settings [72] ......................................................................................................... 32
Feed-reducing valve [75] ............................................................................................. 32
Setting of feed reduction in the A-port [75A] and [75B] ............................................... 32
Port relief and/or anti-cavitation valves [76 A, B] ......................................................... 33
System functions ......................................................................................................... 34
System signal lines [80] ............................................................................................... 34
Individual LS connection [81] ....................................................................................... 34
Two-speed function [82] ............................................................................................... 35
Internal connection of service port [85] ....................................................................... 35
Connectors .................................................................................................................. 35
Function manifolds [90-99] ................................................................................................ 36
Direct Levers ...................................................................................................................... 37
Dimensional drawings, valve ........................................................................................ 38-39
Dimensional drawings, spool actuators with open spool end ............................................ 40
Dimensional drawings, spool actuators with open and closed spool ends ........................ 41
Dimensional drawings, spool actuators with closed spool end .......................................... 42
[00] refererar till positionsnummer i kundspecifikationen
4
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
The L90LS is a stackable, multi-section,
load-sensing, pressure-compensated
directional valve for mobile machines such
as cranes, skylifts, forklift trucks, platform
trucks, excavators and harvesters. It is
designed for working pressures of up to
320 bar and a maximum pump flow of
200 l/min. The valve can be given excel-
lent simultaneous-operating character-
istics, which enable several machine
functions to be operated responsively at
the same time, regardless of the sizes of
individual loads.
To facilitate precise customization
for different applications, the L90LS is
of wholly modular construction. Each
valve is therefore built to order, so that it
incorporates exactly the valve functions
and values needed to control the given
machine in an optimal way.
Compact, integral system
construction
The total modularity of the L90LS gives
unique opportunities to integrate a wide
range of normally external functions into
the valve. Such functions can be common
or specific to individual spool-sections, so
that widely differing criteria for individual
machine functions can be met in just one
valve. This enables compact, tailored,
logical, pre-tested, service-friendly system
solutions to be created for many different
types of machine.
In situations where flow demands vary
so greatly that two separate directional
valves would normally be required, the
L90LS can, with the aid of a special
combo-inlett, be flanged to a larger valve
such as the K170LS or K220LS to give
a compact, unitized system solution and
optimum economy.
Wide range of spool actuators
The spools in the L90LS can be actuated
directly by means of levers or remotely by
pneumatic, electro-pneumatic, hydraulic
or electro-hydraulic remote control. Some
of our remote-controlled spool actuators
can be fitted with a supplementary direct
lever to give a dual-control and/or emer-
gency facility. The wide range of actuating
options gives the machine designer great
freedom in terms of control criteria and
component location.
Customisation and economy
The L90LS can be tailored optimally to
control either simple or complex machine-
functions and combinations thereof.
Its facilities for integrating total, wholly
customized solutions for a wide range of
applications give low system costs and
minimal energy consumption.
Safety and serviceability
The design of the L90LS makes it easy
for machine manufacturers to comply with
national and international safety regula-
tions, such as those contained in the EC
Machinery Directive. Special safety func-
tions for machines such as cranes and
skylifts can be integrated into the valve in
a logical and simple way. With all system
functions contained in a robust, compact,
pre-tested unit with minimal external
pipework, overall safety and reliability
is greatly improved at the same time as
servicing and the training of personnel is
made much easier.
Spool sections and flow rates
The L90LS can be supplied in combina-
tions of 1-12 spool sections or in combina-
tion with special function manifolds fitted
between spool sections. The maximum
recommended flow rate per spool section
is 125 l/min, or 90 l/m when equipped with
a pressure compensator.
Examples of optional functions
Depending on the application and oper-
ating criteria of the machine, a wide range
of common, section- or port-specific
optional functions can be integrated into
the L90LS. Examples include:
• a bypass function in the inlet section for
systems fed by fixed pumps.
• a pump-unloading function that blocks
the pump inlet when activated, thus
enabling an emergency-stop function
to be incorporated into the system.
• section-specific pressure compensa-
tion.
• port-specific relief and anti-cavitation
functions.
• port-specific feed reduction.
• port-specific force-feedback functions
that enable force-sensing and also
provide a hydraulic ramp function.
• a load-signal copying function to elimi-
nate micro-sinking.
• a built-in pilot-pressure function in the
end section.
• a counter pressure function that gives
exceptionally good make-up character-
istics and the possibility of unloading
lowering movements.
• section-specific two-speed functions
that enable switching between perform-
ance and precision work in machines
such as cranes and skylifts.
• automatic stopping functions for
selected machine movements in the
event of overload or the reaching of
other pre-determined limits.
• priority for machine functions such as
brakes and steering.
• Flow distribution between different
consumers at maximum flow take-off
from the pump.
General Information
5
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
System Description
Principle circuit diagram for valve with load sensing.
Load sensing systems, LS
In the load sensing system both pressure and flow are modulated
to match immediate needs from the consumers, with a pressure
level corresponding to the heaviest load at that moment.
The load signal system of the L90LS consists of an appro-
priate number of changeover valves, which compare the load
signals from the spool sections. The highest load pressure is
transmitted and controls the variable pump either directly or via a
copy spool.
In order to achieve good operating characteristics, the pump
should be sized to deliver flow equal to the sum of all simultane-
ously working functions. If the control pressure difference cannot
be maintained, the operating characteristics of the valve can
quickly deteriorate, and the controlled functions will influence
each other, progressively resulting in lower loads receiving more
flow than the higher ones.
In common with a constant flow system, simultaneously
working functions should have approximately the same pressure
requirement or they should be divided into separate circuits for
high operating efficiency.
Operating characteristics
With a correctly adjusted L90LS valve, the operating charac-
teristics of the system are very good. The constant differential
pressure maintained by the pump means that the flow to the
heaviest load in a load sensing system is always pressure
compensated.
However, load sensing does not mean that other functions
are pressure compensated. To achieve good operating character-
istics, the spools should be adapted for each function.
L90LS valves are designed for remote control and have
pressure-compensated spools. This means that the regulated
flow remains constant at a certain lever position, regardless of
pressure variations in the system.
20 40 60 80 100
0
40
60
80
20
0
q(l/min) Flow rate in work port
Lever stroke in %
In the L90LS equipped with PC, ECS and ECH closed spool-
actuators, the spools are pressure compensated, with the result
that the load’s influence on speed is negligible.
250 bar lower
50 bar
q pump
P2B
T3
T1B
P1
B A B A PS
TPB
PL
LS
PX
LSP
When there are demands for very good simultaneous-operating
characteristics or intensive, multi-section operability and respon-
siveness, individual spool-sections in the L90LS can be equipped
with integral pressure-compensators. Sections so equipped are
not then influenced by other simultaneously-operated machine
functions, regardless of the variations in loads, provided there is
sufficient pump capacity.
6
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Pressures
Pump connection max. 260/320 bar* (3800/4600 psi)
Service ports max. 280/350 bar* (4000/5000 psi)
Tank connection max. 20 bar (290 psi)
* Stated pressures are absolute shock pressures, valid for
grey / nodular iron.
Flow rates, recommended
Pump connection max. 200 l/min (50 US gpm)
Service port, with pressure
compensator max. 90** l/min (24 US gpm)
Service port, without pressure
compensator max. 125** l/min (33 US gpm)
Return from service port max. 150 l/min (40 US gpm)
Leakage from work port over spool
From A or B port: max. 30 cm
3
/min (1.83 cu.in/min) at 250 bar
(3625 psi), oil temperature 50 °C (122 °F) and viscosity
30 mm
2
/s (cSt).
** Depending on spool variant.
Feed reducing valves
Setting range 25 - 330 bar (363-4785 psi)
Internal pilot pressure
Fixed setting 22, 35 or 43 bar (320, 508 or 625 psi)
Filtration
Filtration must be arranged so that Target Contamination Class
20/18/14 according to ISO 4406 is not exceeded. For the pilot
circuit, Target Contamination Class 18/16/13 according to ISO
4406 must not be exceeded.
Tank connection
T1 [25]
Pump connection
P1 [26]
Pump connection
P2 [32]
Tank connection
T2 [33]
Separate tank connection for
pilot circuit, TP [40]
Tank connection
T3 [34]
LS connection from parallel
valve LSP [31]
Connections
LS, PX, PL
Technical Data
Port relief valve [76]
Service port connection A,
section 1
Main pressure
relief valve
[16]
Pump unloading function BEN[22]
Spool actuator C[50] Spool actuator ECH[50] Spool actuator PC[50]
Pilot pressure supply for external use, PS.
Connection to external pilot oil filter YS[39].
Pilot pressure supply R[37]
Service port connection B,
section 3
Feed reducing [75]
7
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Temperature
Oil temperature, working range +20 to 90 °C (68 to 194 °F)*
Hydraulic fluids
Best performance is obtained using mineral-base oil of high
quality and cleanness in the hydraulic system.
Hydraulic fluids of type HLP (DIN 51524), oil for automatic
gearboxes Type A and engine oil type API CD can be used.
Viscosity, working range 15-380 mm
2
/s**
Technical information in this catalogue is applicable at an oil
viscosity of 30 mm
2
/s and temperature of 50 °C using nitrile
rubber seals.
* Performance efficiency will be reduced if outside the ideal
values. These extreme conditions must be evaluated by the
user to establish suitability of the products performance.
* * Product operating limits are broadly within the above range,
but satisfactory operation within the specification may not be
accomplished. Leakage and response will be affected when
used at temperature extremes and it is up to the user to deter-
mine acceptability at these levels.
Weights
Inlet section 5.5 kg 12.1 lb
End section 4.2 kg 9.3 lb
Combo-inlet 11.5 kg 25.4 lb
Combined spool-end section, MU
compared to spool section below adds 1.2 kg (2.6 lb)
Spool section with spool actuator:
C, B3 4.1 kg 9.0 lb
ACE 5.2 kg 11.5 lb
CH, CHB3, CHX, PC 4.5 kg 9.9 lb
PCH 4.7 kg 10.4 lb
EC, ECS, 5.2 kg 11.5 lb
ECH, ECHL 5.4 kg 11.9 lb
Surface treatment (painted) [07]
P Primed valve, black. Primer only
X Unpainted
The paint is only a primer. For full corrosion protection, the valve
must be painted with an outer coat.
Technical Data
Connections
Unless stated otherwise, all standard connections are available
in two versions: G-version (BSP pipe thread) for flat seal (type
Tredo) as per ISO 228/1 and UNF-version for O-ring seal as per
ISO 11926-1.
Connec-
tion
In section G-ver-
sion.
UNF-version
P1 inlet section G 3/4 1 1/16-12 UN-2B
T1 inlet section G 3/4 1 1/16-12 UN-2B
P1 combo-inlet CA/CL Flange SAE 1 High pres-
sure ISO 6162-2
T1 combo-inlet CA/CL Flange SAE 1 1/4 Std
pressure ISO 6162-1
T2 combo-inlet CA/CL G 1 1 5/16-12 UN-2B
LS, PL,
PX, AS2
inlet, combo-inlet CA/CL G 1/4 9/16-18 UNF-2B
P2 end and spool/end
section MU
G 1/2 7/8-14 UNF-2B
T2, T3 end and spool/end
section MU
G 3/4 1 1/16-12 UN-2B
TP end and spool/end
section MU, combo-inlet
CA/CL
G 3/8 3/4-16 UNF-2B
PS end and spool/end
section MU, combo-inlet
CA/CL
G 1/4 9/16-18 UNF-2B
LSP spool/end section MU 9/16-18 UNF-2A (ORFS
pipe end, male)
LSP end section G 1/4 9/16-18 UNF-2B
YS end section, combo-inlet
CA/CL
G1/4 9/16-18 JIC (37°)
(male)
A, B spool section G 1/2 7/8-14 UNF-2B
PC spool section G 1/4 9/16-18 UNF-2B
ACE,
ACEF,
ACP
spool section G 1/8 1/8-27 NPTF
LSA/
LSB
spool section G 1/8 7/16-20 UNF-2B
8
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Hydraulic circuits
L90LS with levers for direct spool actuation and equipped with
bypass for systems fed by pumps with fixed displacement.
L90LS with electro-hydraulic remote-controlled spool actuators
and equipped with direct-acting main pressure relief valve for
systems fed by LS pumps, pump-unloading function, integrated
pilot-oil supply, counter pressure function, section-specific pres-
sure compensators, port-specific feed reducing valves, port-relief
and anti-cavitation valves, etc.
T1
B A B A
P2B
T2B
T3B
LSPBPL LS PX
P1
P2B
T3
T1B
P1
B A B A PS
TPB
PL
LS
PX
LSP
9
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
The item numbers in the hydraulic circuit diagram and table
below refer to the valve function areas for which different
options are available. The valve in the example above is
equipped according to the description below. For other equip-
ment alternatives, see under respective valve-function area
[Item number] in catalogue.
Item
No. Code Description
15 CFC Inlet with bypass for systems with fixed pump.
16 PS Pilot-operated main pressure relief valve.
20 KB Prepared for load-signal copying.
22 BEN Electrically activated pump-unloading function
that blocks the pump and unloads the load
signal.
25 T1X Tank connection in the inlet open for by-pass flow
and tank gallery to spool section 1 plugged.
26 P1 Pump connection in inlet open.
31 LSPB Load-signal connection for parallel-connected valve
plugged.
32 P2B Pump connection plugged.
33 MF Counter pressure valve with fixed setting.
34 T3 Tank connection open.
37 R Pressure reducing valve with separate safety valve
for internal pilot pressure supply.
39 S Internal coarse filter for pilot circuit.
40 TPB Prepared for separate tank connection from pilot
circuit.
Item
No. Code Description
47 TTT Section 1 equipped with pressure compensator,
separate feed reducers for A- and B-ports, and
prepared for port relief valves in both service ports.
000 Section 2 without pressure compensator, feed
reducer or port relief valve.
50 EC Section 1 equipped with proportional electro-
hydraulic remote control.
CH Section 2 equipped for direct operation with spring
centring.
60 D Sections 1 and 2 equipped with spool for double-
acting function, with service ports blocked in neutral
position.
66 K Pressure compensator with built-in check valve
function.
67 0.8
Restriction of load signal to pressure compensator.
75 Pressure setting for feed reducers in A- and
B-ports.
76A N2 Anti-cavitation valve in A-port.
76B Pressure setting for combined port-relief and anti-
cavitation valve in B-port.
Hydraulic circuits
Hydraulic circuit diagram showing basic functions of L90LS.
50 66 76 75 50
25
22
20
15, 16
26
T1
B A B A
PS
TPB
40
47
32
39
37
33
34
31606067
P1
PL PX
LSPB
T3
P2B
LS
10
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
The inlet section is available in several basic variants; one for fixed
pumps,
four for systems with variable pumps and a simple plate
for use when none of the inlet section’s integrated functions
is required. Inlet sections are equipped with pump and tank
connections, a connection for the load signal to variable pumps
and gauge ports for measuring the pump and load-signal pres-
sures. In all basic variants, the pump connection P1 [26] and
tank connection T1 [25] are open, while the other connections
are plugged. The variant for fixed pumps can be converted easily
in the field to work with variable pumps, and vice versa. (CFC ↔
LS1).
Functions for maximum pressure relief, copying of the load
signal and pump unloading (which blocks the hydraulic energy
supply to the valve) can be integrated into the inlet section.
Inlet sections [15]
CFC Inlet section for systems with fixed pump. The section
is equipped with an adjustable, pilot-operated pressure
relief valve, PS [16], which protects the pump and inlet
side of the valve. A built-in bypass regulates excess oil
directly to tank. The bypass pressure level is controlled
by the load signal, and is approx. 10 bar above the
actual load-signal pressure.
LS1 Inlet section for systems with variable pump. Equipped
with an adjustable, pilot-operated pressure relief valve,
PS [16], which protects the pump and inlet side of the
valve.
Pump connection P1 [26]
Tank connection T1 [25]
Pressure relief valve PS [16]
Gauge port::
Copied load
signal LS
Pump pressure
PX
Load signal PL
Pump unloading function
BEN [22]
Inlet Section
∆p (bar)
q (l/min)
CFC – Idling (no load) pressure drop over bypass. P1 –T1.
Inlet section CFC alt. LS1 with pump unloading function.
20
30
10
0
0 50
100
150 200
11
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Inlet Section
LS2 Inlet section for systems with variable pump. Equipped
with a non-adjustable, direct-acting pressure relief
valve, PA1 [16], which protects the pump and inlet side
of the valve. The LS2 variant is normally equipped with
a copy function for the load signal, KS [20].
AS Inlet section with flow distribution function for systems
with variable pump. The section distributes the pump
flow between activated spool sections fitted with
compensator type KAS [66], at maximum flow take-off
from the pump. With other inlet types, the consumer
working the hardest receives no flow, which instead
goes to the consumer with the lowest load. The section
is equipped with a load pressure limiting valve, PLM
[16], and a differential pressure limiting valve (pump
pressure-load pressure), PLS [18]. Valves with AS inlet
are located closest to the pump in a multi-valve system
with the load signal connected to the pump regulator.
Inlet section LS2
Inlet section AS
12
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Inlet Section
AS2 Inlet section for following valve in a flow distribution
system. The load signal from this valve is connected to
the preceding valve. Otherwise, the functionality is as
for inlet section AS except that the section only contains
a load pressure limiting valve, PLM [16].
IP Inlet plate without functions. Contains only connections
for pump, tank and load signal.
Inlet section AS2
CA/CL Combo inlet used as mid-inlet when L90 and K170/
K220 are assembled together. This works as an adapter
plate between valves and replaces inlet sections from
both valves. The combination inlet is available with the
same functionality as the LS2, AS and AS2 inlets. It can
also include pilot pressure supply and the counter pres-
sure function, in which case it replaces the standard,
US [30], and the simpler combined spool and end
section, MU [30], can be used instead. The inlet is
specified in the K170LS or K220LS valve specification,
and the same code (CA/CL) must be entered for item
15.
For more information see the catalogue for K170LS or
K220LS.
Combo-inlet CA
13
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Inlet Section
P1
T1
PL
LS
T1
P1
PL
LS
PX
T1
P1
PL2
PL
LS
T1
P1
PL2
PL
LS
T1
P1
PL
LS
LS2 – Inlet section for
systems with variable
pump.
CFC – Inlet section for
systems with fixed
pump.
AS2 – Inlet section for secondary valve in flow-sharing system.AS – Inlet section for flow-sharing valve.
LS1 – Inlet section for systems with variable pump.
14
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Pressure relief valve [16]
The inlet section is normally equipped with a pressure relief valve
to protect the pump and valve from pressure peaks in the system
when there are rapid changes in the load pressure.
PA1 Direct-acting pressure relief valve with very fast opening
sequence and good pressure characteri stic. The inter-
changeable cartridge is factory set. The cartridge has a
make-up function, which means that oil is able to flow
from the tank gallery to the pump gallery in the event
of negative pressure in the pump circuit. The valve
is intended for the LS2 inlet section [15]. For setting
values, please see Pressure setting [17].
Inlet Section
PA1 - Direct-acting pressure relief valve.
PLM Main relief valve in AS / AS2 [15] inlet section. Limits
the load signal pressure that is sent to the pump.
PLM – Pressure relief valve for inlet section AS and AS2.
PS – Pilot-operated pressure relief valve for inlet section CFC
and LS1.
PS Pilot-operated pressure relief valve with fast opening
sequence and very low pressure override, which effec-
tively prevents overloading of the hydraulic pump and
the machine. The valve is adjustable and is delivered
factory-set according to the value specified. The valve is
intended for the CFC and LS1 inlet sections [15].
Y Plug which can replace the pressure relief valve in the
LS2 inlet section [15]. The Y-plug blocks the connection
between the pump and tank completely.
/ Not machined for pressure relief valve.
15
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
PLS - limiting function which maximise the differential pressure
between the pump pressure and the load signal.
Inlet Section
Pressure setting [17]
Pressure setting for PA1 [16]
The direct-acting pressure relief valve, PA1, is delivered
with a fixed setting. The following standard settings are
available:
Pressure setting in bar: 63, 80, 100, 125, 140, 160, 175,
190, 210, 230, 240, 250, 260, 280, 300 and 320.
Pressure setting for PS [16]
The pilot-operated pressure relief valve, PS, is adjust-
able from 50 to 320 bar. The valve can, however, be
delivered with a fixed setting according to the value
specified.
Differential pressure limiter, PLS [18]
20-38 Function which maximize the pressure difference
between the pump pressure and the load signal from
the spool sections in inlet section AS [15]. The differen-
tial pressure must be set slightly higher in the inlet than
in the pump regulator itself, approx. 5-8 bar.
∆p (bar) Pressure relief characteristics∆p (bar) Pressure relief characteristics
q (l/min)
PA1 - Direct acting pressure relief valve.
q (l/min)
PS - Pilot-operated pressure relief valve.
300
400
200
100
0
0
50 100
150
200
50
100 150 200
100
0
0
200
300
400
16
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Load signal system [20]
The load-signal system consists of a series of shuttle valves, one
for each spool section in the directional valve. The shuttle valves
compare the load signals from all actuated spool sections and
transmit the signal with the highest value to the PL connection in
the inlet section. If the valve has a load-signal copying function,
the signal is transmitted to a copy spool, which makes a copy of
the signal and transmits it to the LS port.
If the load-signal chain is extended to a parallel-connected
valve via the LSP port [31], then the highest load signal from the
parallel-connected valve is included in the comparisons made by
the load-signal chain in the first valve.
In the case of the CFC variant of the L90LS, i.e. the variant
fed by a fixed pump, the highest load signal is transmitted to
the bypass valve, which regulates the pressure in the pressure
gallery to approx. 10 bar above the value of the signal.
KB Inlet section machined for copy spool but blocked.
Provides option to install copy spool later.
The load signal goes directly to the bypass in CFC
systems , or to the PL connection in LS systems.
KS Inlet section with copy spool.
The load signal acts on a copy spool, which sends a
copied load signal to the LS connection.
The copying system permits a certain consumption
in the load-signal line to the pump regulator, without
the load signal being influenced. This enables simpler
system construction, with the possibility of installing
logic systems in the LS circuit. Thanks to drainage in
the pump LS regulator, the system gives better winter
operating characteristics with faster response, since
the oil in the LS circuit is always warm. Moreover, it
prevents the tendency for the load to sink slightly at the
beginning of the lifting phase.
Inlet sections of type LS2 [15] are normally equipped
with copy spools.
/ Not machined for copy spool.
KB - Inlet section without copy spool.
KS - Inlet section with copy spool.
Inlet Section
T1B
P1
B A
PL
LS
PX
KS - Inlet section with copy spool.
Copied load
signal LS
Pump pressure
PX
Load signal PL
17
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Pump-unloading function [22]
If required, the valve can be equipped with a pump-unloading
function in the inlet section. This enables machine manufacturers
to equip their machines with an emergency-stop function to
comply with the EC Machinery Directive. The function can be
controlled either electrically or hydraulically.
(The inlet section is not normally machined to accommodate
the pump-unloading function.)
BEN Electrically controlled pump-unloading function. When
the current to the electromagnet is broken, the pump
is blocked and the load signal drained to tank. In both
LS and CFC systems, this means that the pressure
gallery is shut off from the pump inlet and the pump is
unloaded.
Connector AMP Junior-Timer type C
For ordering of connector, see page 35.
BX Hydraulically controlled pump-unloading function. When
an external hydraulic signal with the same pressure
as the pump is connected to the BX port, the pump
is blocked and the load signal drained to tank. In both
LS and CFC systems, this means that the pressure
gallery is shut off from the pump inlet and the pump is
unloaded.
Connection: G1/4 or 9/16-18 UNF-2B.
BB Inlet section machined for pump-unloading function.
/ Not machined for pump-unloading function.
Tank connection T1 [25]
T1 Tank connection T1 is open. Normal variant.
T1B Tank connection T1 is blocked.
T1X Used together with CFC [15] and MF counter pressure
functions [33] only. Tank connection T1 in the inlet
section is separated from the tank galleries in the spool
sections. Pump oil that is not used flows via the bypass
directly to tank via T1, while returning oil from the actua-
tors flows to tank via the counter pressure valve in the
end section and tank connection T3.
Circuit, see page 9.
Pump connection P1 [26]
P1 Pump connection P1 is open. Normal variant.
P1B Pump connection P1 is plugged.
BX – Connection of signal pressure.
BEN - Electrically controlled pump-unloading function.
BX - Hydraulically controlled pump-unloading function.
External connection of signal
pressure from pump line
Inlet Section
T1B
P1
B A
PL
LS
PX
BEN - Electrically controlled pump-unloading function.
18
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
End section [30]
US End section with the options pilot pressure supply and
counter pressure function.
MU Combined spool and end section without counter pres-
sure function, MF [33], and pilot pressure supply, R [37].
MU is useful in valves with open spool controllers, or if
external pilot pressure supply is already available. The
section is also useful together with combination inlets
CA or CL [15].
Section MU is only available in nodular iron.
For more information about the spool section, see the
selectable options later in the catalogue in the relevant
sections.
The end section can be equipped with a number of optional func-
tions to customize it optimally for the given application. It can,
for instance, be equipped with a pressure-reducing valve, R to
supply internal pilot-pressure for hydraulic or electro-hydraulic
spool actuators, and a fixed counter pressure valve, MF in the T2
port.
In the basic version of the end section, all connections are
plugged.
As an alternative to the standard end-section, when internal pilot
generation, R [37] and/or counter pressure valves, MF [33] are
not needed, a combined spool-end section (MU) can be selected.
MU [30], together with the combo-inlet section (CL/CA [15],
makes a very compact and cost effective solution.
Counter pressure valve,
MF [33]
Separate tank connection
for pilot circuit, TP [40]
Pilot pressure
connection, PS
Pilot coarse filter
S [39]
Internal pilot
pressure supply
R [37]
Pump connection P2 [32]
Load signal
connection
LSP [31]
Tank connection T3 [34]
End Section
US End Section with pilot pressure supply, pilot filter, Counter
pressure valve and separate tank connection for pilot circuit.
Combined spool and end section MU.
Check valve in
pilot circuit
19
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
LSPB – LSP-port plugged
and load signal
internally connected
to tank.
LSP – Port for connection of
load signal from other
valve is open.
LS connection [31]
LSP Port for connection of load signal from other valve open.
This connection is used to receive the load signal from
a parallel-connected valve.
LSPB Port for load signal from other valve plugged.
LSPX Only for end section MU [30]. Port for load signal
plugged, with no possibility of converting to LSP version.
/ No LS connection.
Pump connection P2 [32]
P2 Alternative pump connection in rear face. The connec-
tion can, for example, be used to feed valves located to
the rear, or for double feeding of the valve in applica-
tions where many machine functions with very high flow
demands are operated simultaneously. Under certain
provisions, the connection can also be used in situa-
tions when feeding from the rear face is the most suit-
able option in terms of available space. When feeding
via P2, the pump-unloading function BEN [22] cannot
be used.
P2B Alternative pump connection plugged.
/ No P2 connection.
Counter pressure valve / tank connection T2 [33]
T2 Alternative tank connection T2 open.
T2B Alternative tank connection T2 plugged.
MF Counter pressure valve factory set to give 5 bar counter
pressure. Tank connection T1 must be plugged, T1B
[25], and tank connection T3 [34] must be open.
If the system has a fixed pump, CFC [15], the option
T1X [25] can be used to reduce the idling (no load)
losses in the system. In this case, shunted oil in the inlet
section cannot pass via the counter pressure valve
/ No T2 connection.
Tank connection T3 [34]
T3 Tank connection T3 is open.
T3B Tank connection T3 is plugged.
/ No T3 connection.
Internal-pilot pressure supply [37]
R Internal pilot-pressure supply is a valve function, built
into the end section, which works as both a pressure
regulator and a pressure relief valve in the pilot circuit.
For safety reasons, the R-cartridge has also been
equipped with a separate safety-valve function that
prevents the maximum permissible reduced pressure
from being exceeded. A check valve prevents pilot oil
from leaking back to the pump, and therefore enables
the pressure in the pilot circuit to be maintained in the
event of a temporary fall in pump pressure, e.g. during a
rapid lowering movement.
Pilot pressure for external use, e.g. for delivery to
PCL4 remote control valves, can be tapped from the PS
connection. Pressure setting: 35 bar.
T
T
P
LS
T
LSPB
T3B
T2
P2B
LS
T
LSPB
T3
End Section
T2 – Without counter- MF – Factory-set
pressure valve. counter pressure
valve.
LS
T
LSP
T2B
T3B
LSPB
T3B
T2B
LS
T
T
P
P2B
R22 Same as R, but with 22 bar pressure setting.
R43 Same as R, but with 43 bar pressure setting.
PS Only for end section MU [30]. Connecting port for
external pilot pressure supply machined and plugged in
the end section face.
/ Valve without internal pilot-pressure supply.
20
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Pilot filter [39]
S Coarse filter with bypass function in the internal pilot
circuit. The filter protects the pilot circuit from dirt, espe-
cially during start-up of the system.
YS Adapter for connection of external filter for pilot oil.
Enables the pilot circuit to be supplied with cleaner oil
compared with the rest of the system.
/ Not machined for pilot filter function
Tank connection for pilot circuit [40]
TP Separate tank connection for the pilot circuit is open.
The connection to the main tank gallery of the direc-
tional valve is blocked. The function is intended for
systems in which there is a risk of dynamic pressure
fluctuations in the tank line, which cause fluctuations in
the pilot circuit when there is a common tank line.
TPB The end section is machined to provide a separate tank
connection for the pilot circuit, and plugged. The tank
return of the pilot circuit is connected to the tank gallery
of the directional valve.
TPX Only for end section MU [30]. The section is machined
for external connection of the pilot circuit to the tank. The
section has no internal connection between the tank
return of the pilot circuit and the upper tank channels of
the valve. The connection is plugged in the end section
face.
/ Not machined for TP connection
R [37] internal pilot-pressure supply.
S [39] coarse filter with bypass function.
TP [40] end section machined to accom-
modate separate tank connection for pilot
circuit.
R [37] internal pilot-pressure supply.
YS [39] adapter for connection of external
pilot-pressure filter.
TPB [40] end section machined to accom-
modate separate tank connection for pilot
circuit, and plugged.
T
PS
T
P
LS
T
LSPB
T3B
T2
R
P2B
TPB
YS
PS
End Section
T
PS
T
P
LS
T
LSPB
T3B
T2
R
S
P2B
TP
PS
21
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
The L90LS is stackable and can be supplied in combinations of
1-12 spool sections. Each section can be equipped individually
with a variety of optional functions, as well as different types of
spool and spool-actuator. This enables optimum customization to
the application and particular machine function in question.
Basic variants of spool section [47]
Spool sections are available in different variants depending on
the choice of optional functions:
OOO Not machined for pressure compensator, load-hold
check valve, feed reducer, port-relief or anti-cavitation
valves.
VOO Section fitted with load-hold check valve, but not
machined for port relief valves.
TOO Section fitted with pressure compensator, but not
machined for port relief valves.
TAO Section fitted with pressure compensator and feed
reduction in A-port, but not machined for port relief
valves.
TBO Section fitted with pressure compensator and feed
reduction in B-port, but not machined for port relief
valves.
TCO Section fitted with pressure compensator and common
feed reduction in A- and B-ports, but not machined for
port relief valves.
TTO Section fitted with pressure compensator and individual
feed reduction in A- and B-ports, but not machined for
port relief valves.
**T All of the section variants above are available in versions
that are machined for, and can be fitted with, port relief
and/or anti-cavitation valves in service ports A and B. In
such cases, the letter T is given in the third position in
the product designation, e.g. OOT, VOT, TOT, TAT, TBT
TCT and TTT. For further information, see Port relief
and/or anti-cavitation valves [76].
MU Combined spool and end section. Shorter total valve
length. For further information, see end section [30].
V** and T** have the same machining and can be converted
easily from one variant to another at any time. However, the
machining for *O*, *A*, *B*, *C* and *T* sections are different.
For further information, see also “Pressure compensator /
load-hold check valve [66]” and “Feed reducing valve [75]”.
Material of spool section [48]
G Spool section in grey iron. Can be used up to a pressure
setting of 260 bar in the pump connection and 280 bar in
the shock valves in motor ports.
S Spool section in nodular iron.
Variant **T prepared for port-relief and/or anti-cavitation valves in
service-ports A and B.
Above left: section with Y-plug in A-port and combined port-relief
and anti-cavitation valve in B-port.
Above right: section with combined port-relief and anti-cavitation
valves in both A and B ports.
Variant OOO. Variant VOO.
Variant TOO. Variant TAO.
Variant TCO. Variant TTO.
T
P
LS
T
B
A
T
P
LS
T
B
A
T
P
LS
T
B
A
T
P
LS
T
B
A
T
P
LS
T
B A
T
P
LS
T
B
A
T
B
A
T
B
A
Spool Section
22
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
C
B3
FD
C
B3
FD
C
B3
FD
C
B3
FD
Spool actuators of both the open and enclosed type can be used
on the L90LS. Open spool-actuators, in which the spool-end is
exposed, are simpler and cheaper. They are intended for use in
systems where low capital cost is a priority. They can be oper-
ated directly by means of linear levers or can be connected to
remote controls by means of wires.
With enclosed spool-actuators, the spool-ends are totally
enclosed in oil-filled caps. Enclosed spool actuators are intended
primarily for hydraulic and electro-hydraulic remote control, but
can also be the preferred choice for direct control in aggressive
environments.
Different versions of spool actuator are available.
Details can be found below.
Spool actuators [50]
Directly operated actuators, with open spool-end
C Spring-centred spool actuator
Steplessly operable with
spring-return to neutral.
Spring force in neutral: 60 N
Spring force when fully actuated: 130 N
B3 Three-position spool actuator
Equipped with 3-position mechanical
detent that gives 3 fixed positions:
neutral and fully actuated in either
direction. Spool remains in selected
position and must be moved
deliberately from one position
to another.
Force needed on spool to
overcome detent: approx. 160 N
FD Friction-detented spool actuator
Lever remains at selected stepless
position. A force index indicates
when the lever is in neutral.
Spool Actuators
Spool function [60]
Spool designation
[69]
Service port A Service port B
Load-hold check valve [66]
Lever bracket LM [51]
Port relief valve PA,
service port A [76]
Port relief valve PA,
service port B [76]
Spool actuator C, [50]
23
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
D101727
D101727
ACE
ACEF
ACP
LULM
ON/OFF remote-controlled actuators, with open
spool-end and facility for manual control
ACE Electro-pneumatic spool actuator, ON/OFF
Spring-centred. Can be fitted with
supplementary local lever
(optional) for direct, stepless
actuation of spool.
Supply pressure: min. 4 bar
max. 10 bar
Spring force in neutral: 95 N
Spring force when spool
fully actuated: 160 N
Solenoid: 12 V DC 0.85 A
24 V DC 0.42 A
Voltage tolerance: ±20%
Connections: G 1/8 or NPTF 1/8-27.
Connector type B EN175301-803 (DIN43650)/ISO6952.
For ordering of connector, see page 35.
ACEF Electro-pneumatic spool actuator, ON/OFF
ACEF is identical to the ACE, except that ACEF
has a common pressure gallery for primary air.
Remote-controlled actuators, proportional spool
actuators with open spool-end and facility for
manual control
ACP Pneumatic proportional spool-actuator ACP can be
fitted with supplementary local lever (optional) for direct,
stepless actuation of spool. The ACP is best controlled
by means of our VP04 remote-control valve (see sepa-
rate brochure).
Breakaway pressure*: 2 bar
Final pressure*: 7 bar
max. 10 bar
Connection thread: G 1/8 or NPTF 1/8-27.
Lever brackets [51]
LM For spool actuators with open spool-end.
LU Spool-sealing cover without lever bracket for
spool actuators with open spool-end.
*
The breakaway pressure is the pressure needed for the direc-
tional valve to open the connection “pump to service port”. The
final pressure is the lowest pressure needed to effect full actua-
tion of a spool in the directional valve. This data must be taken
into consideration when choosing control units, since the opening
pressure of the control unit must be lower than the breakaway
pressure of the spool actuator in order to avoid jerky starting and
stopping. However, the control unit’s final pressure must be higher
than the final pressure of the directional valve in order to ensure
that the spools can be fully actuated.
Spool Actuators
Spool in (→) activate P-B, A-T
Spool out (←) activate P-A, B-T
Actuation
P-B, A-T
Actuation
P-A, B-T
24
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Directly operated actuators with enclosed spool-ends
CH Spring-centred spool actuator
Has enclosed spool-ends for use in
aggressive environments.
Steplessly operable with spring-return
to neutral.
Spring force in neutral: 70 N
Spring force with spool fully actuated: 140 N
CHX Spring-centred spool actuator
Same as CH, but with stronger springs
to compensate for friction in external
linkage arms etc.
Spring force in neutral: 85 N
Spring force with spool fully actuated: 250 N
CHB3 Three-position spool actuator
Equipped with 3-position mechanical
detent that gives 3 fixed positions:
neutral and fully actuated in either
direction. Spool remains in selected
position and must be moved deliberately
from one position to another.
Force needed on spool to
overcome detent: approx. 160 N
Spool Actuators
CH, CHX
PC
PCH
CHB3
CH, CHX
PC
PCH
CHB3
CH, CHX
CHB3
Stroke length limitation
P-B, A-T Qset B [72]
Stroke length limitation
P-A, B-T Qset A [72]
Pressure compensator,
K [66]
Feed-reducing valve [75]
Compensator restrictor [67]
25
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Proportionally remote-controlled actuators, with
enclosed spool-ends and facility for manual control
PC Hydraulic spool-actuator
PCH Hydraulic spool-actuator with facility for supplemen-
tary local lever for direct control
The PC and PCH are proportional, hydraulically
controlled spool actuators with spring-centring to neutral.
They are intended to be controlled by the PCL4 remote-
control valve. When determining a suitable control
pressure for the PCL4, bear in mind that its breakaway
pressure should be approx. 0,5 bar lower than that of the
directional valve in order to ensure gentle starting and
stopping. The pilot pressure for the PCL4 can be tapped
from the internal pilot-pressure supply in the end section
of the directional valve, via the PS connection.
Breakaway pressure*: 5.5 bar
Final pressure*: 15.0 bar
Permissible pressure in pilot cap: max. 35 bar
Connections: G ¼ or 9/16-18 UNF
*
The breakaway pressure is the pressure needed for the direc-
tional valve to open the connection “pump to service port”. The
final pressure is the lowest pressure needed to effect full actua-
tion of a spool in the directional valve. This data must be taken
into consideration when choosing control units, since the opening
pressure of the control unit must be lower than the breakaway
pressure of the spool actuator in order to avoid jerky starting and
stopping. However, the control unit’s final pressure must be higher
than the final pressure of the directional valve in order to ensure
that the spools can be fully actuated.
See also separate catalogue for PCL4.
Spool Actuators
CH, CHX
PC
PCH
CHB3
Pilot restrictor [55B]
Pilot restrictor [55A]
CH, CHX
PC
PCH
CHB3
PC
PCH
Control signal
P-A, B-T
Control signal
P-B, A-T
Stroke length
limitation
P-A, B-T
Qset A [72]
Stroke length limitation
P-B, A-T Qset B [72]
Stroke length limitation
P-B, A-T Qset B [72]
Stroke length limitation
P-A, B-T Qset A [72]
Service ports to tank
blocked
Y2 [76]
Pressure compensator, KAS [66]
26
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Proportionally remote-controlled actuators, with
enclosed spool-ends
EC/ECS Electro-hydraulic spool actuator
The EC/ECS are proportional, electro-hydraulically
controlled spool actuators with spring centering to
neutral. They are intended to be controlled remotely by
the IQAN control systems. Pilot-pressure oil is led to the
spool actuators through internal ducts in the directional
valve. This means that only the cable connectors from
the control system to the pilot solenoid valve needs to
be connected externally.
Control current for 12 V
Breakaway* min. 550 mA
Fully actuated max. 980 mA
Control current for 24 V
Breakaway* min. 260 mA
Fully actuated max. 510 mA
The control current must be regulated for temperature
compensation and with ripple to minimise hysteresis.
Measuring connections: G1/4 or 9/16-18 UNF
EC as ECS but with manual over-ride and air-bleed
screw in the pilot solenoid valve.
*
The breakaway current refers to the current needed for the direc-
tional valve to open the connection “pump to service port”. The
final current is the lowest current needed to effect full actuation
of a spool in the directional valve. This data must be taken into
consideration when choosing control units, since the opening
current of the control unit must be lower than the breakaway
current of the spool actuator in order to avoid jerky starting and
stopping. However, the control unit’s final current must be higher
than the final current of the directional valve in order to ensure
that the spools can be fully actuated.
Stroke length limitation
P-A, B-T Qset A [72]
Spool Actuators
EC, ECS
ECH, ECHL
Pilot restrictor [55B]
Pilot restrictor [55A]
Connector Type [56]
The connector of the solenoid is of type:
A AMP Junior-Timer type C.
D Deutsch type DT04-2P. Mates with DT06-2S Plugs.
The connector must be ordered separately.
EC, ECS
Actuation
P-A, B-T
Actuation
P-B, A-T
Air-bleed screw Manual over-ride
EC pilot solenoid valve with manual over-ride and
air-bleed screw.
27
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Proportionally remote-controlled actuators, with
enclosed spool-ends and facility for manual control
ECH Electro-hydraulic spool actuator with facility for
supplementary local lever for direct control
The ECH spool actuator can be operated directly and
steplessly by a supplementary local lever (optional).
Spring force in neutral 60 N
Spring force with spool fully actuated 350 N
Other data as for ECS to the left.
ECHL Same as ECH, but with weaker centering spring.
Suitable for use, e. g. when spool actuator is
mainly intended to be operated directly.
Spring force in neutral 85 N
Spring force with spool fully actuated 250 N
Control current for 12 V
Breakaway* min. 550 mA
Fully actuated max. 820 mA
Control current for 24V
Breakaway* min. 260 mA
Fully actuated max. 440 mA
Other data as for ECH above.
*
The breakaway current refers to the current needed for the direc-
tional valve to open the connection “pump to service port”. The
final current is the lowest current needed to effect full actuation
of a spool in the directional valve. This data must be taken into
consideration when choosing control units, since the opening
current of the control unit must be lower than the breakaway
current of the spool actuator in order to avoid jerky starting and
stopping. However, the control unit’s final current must be higher
than the final current of the directional valve in order to ensure
that the spools can be fully actuated.
Stroke length limitation
P-B, A-T Qset B [72]
Stroke length limitation
P-A, B-T Qset A [72]
Actuation
P-A, B-T
Actuation
P-B, A-T
Pilot restrictor [55B]
Pilot restrictor [55A]
EC, ECS
ECH, ECHL
Connector Type [56]
The connector of the solenoid is of type:
A AMP Junior-Timer type C.
D Deutsch type DT04-2P. Mates with DT06-2S Plugs.
The connector must be ordered separately.
ECH, ECHL
Spool Actuators
28
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Lever bracket [51]
L1 Lever-bracket for directly operated spool actuators with
enclosed spool-ends, e.g. CH, and for remote-controlled
spool actuators that have facility for supplementary local
lever for direct control, e.g. ECH.
In addition to the normal lever-attachment angle, L1, the
lever bracket is available in 8 other angles, designated
L0 to L8 (see figure opposite). In the L4 variant, for
instance, the lever is mounted parallel with the spool.
Pilot restrictor [55 A, B]
To give gentle control characteristics, remote-controlled spool
actuators with enclosed spool-ends are fitted with pilot restric-
tors, which can be chosen individually for each service port. The
restrictor gives a kind of ramp function.
Restrictors from 0.45 to 2.0 mm available.
As standard 0,8 mm is recommended.
Lever brackets L can be given different attachment angles.
L * = P–A B–T
L0
L1
L2
L3
L4
A B
L5
L6
L7
L8
20°
20°
20°
20°
20°
20°
20°
20°
Pilot restrictor.
B
A
Spool Actuators
29
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
The spool is the most important link between the operator’s
actuation of a control lever and the behaviour of the corre-
sponding machine function. The designs of our spools are there-
fore customized to meet the operating criteria of each individual
machine function as accurately as possible. Spools are designed
with the aid of a computerized specification system, which takes
all factors into account.
Spool function [60]
There are many spool variants: D, EA, EB, M, CA, Dm, Da and
Db, which are customized for different flows, load conditions and
actuator area ratios. The spools are also available with different
degrees of force feedback from the A- and/or B-side [64 A/B].
D Double-acting spool for, e.g. double-acting cylinder.
Blocked in the neutral position.
EA Single-acting spool for, e.g. single-acting cylinder.
Blocked in the neutral position. Service port B blocked.
EB Single-acting spool for, e.g. single-acting cylinder.
Blocked in the neutral position. Service port A blocked.
M Double-acting spool for, e.g. hydraulic motor. Float
position function in neutral position.
CA Regenerative spool for saving oil from the pump. The
large side of the cylinder is connected to the A-port. Oil
from the B port is passed to the A port and not to the
tank when P is connected to A.
Dm Double-acting spool with drainage A to T and B to T,
which prevents pressure build-up in the neutral position.
The spool is used as a double-acting spool in combina-
tion with, e.g. an overcentre valve.
Da Double-acting spool with drainage A to T, which
prevents pressure build-up in the A-port in the neutral
position. The spool is used as a double-acting spool in
combination with, e.g. an overcentre valve.
Db Double-acting spool with drainage B to T, which
prevents pressure build-up in the B-port in the neutral
position. The spool is used as a double spool in combi-
nation with, e.g. an over-centre valve.
Flow requirements [61 A, B]
There is a wide range of function optimized spool for the L90LS
with nominal flows of up to 90 l/min per spool-section when the
sections are equipped with individual pressure-compensators.
Without individual pressure-compensators, flows up to 125
l/min per spool section are obtainable, depending on the adjusted
differential between the load-signal pressure and the pump pres-
sure.
On the basis of the desired flows to the A and B ports
entered in the ordering documentation, our computerized valve-
specification system selects a spool to give at least the specified
flow, at the same time taking all other parameters into account.
The maximum flow is then set by limiting the spool stroke
by means of adjustment screws on the spool actuators or, in
the case of electro-hydraulic remote control, by tuning the elec-
tronics.
See “Flow settings [72]” for details on factory-set maximum
flows.
Spool symbols
Dm
Da
CA
M
EB
EA
D
B
A
Db
P T
q (l/min) Flow rate in motor connection
Spool stroke (mm)
Typical curves showing flow as a function of spool stroke.
Choice of spool
30
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Area ratios [62]
The area ratio for a spool section is calculated by dividing
the cylinder area that is connected to the B-port by the area
connected to the A-port. When the large side of the cylinder is
connected to the A-port, the area ratio is less than 1. The area
ratio for a motor is 1.
LAB - Lift load can change between the A- and B-port.
Load characteristics [63]
The characteristics of the lift load can be specified according to
five typical cases. This information is entered so that the spool
can be be customized optimally for the intended application.
LAB Lift load can alternate between A-port and B-port.
LA Lift load normally on A-port only.
LB Lift load normally on B-port only.
LN No or low lift-load on A- and B-ports.
S Slewing function.
Force feedback [64 A, B]
The L90LS can be furnished with a force-feedback function to
give operators of the LS system the same positive sense of
force-control obtained with constant-flow (CFO) systems. This
makes it easier for the operator to avoid damaging the machine in
applications such as digging, since he is able to sense increasing
resistance or outright obstacles to the movement of a machine
function.
Force feedback also gives a kind of ramp function that results
in more gentle transition between rapid changes in the speed
of a machine movement. This in turn has a stabilizing effect
on the hydraulic system and results in smoother operation of
the machine. Both characteristics are important, especially for
functions like slewing movements. In addition to increasing the
efficiency of the machine, they also minimize wear.
The A and B ports individually can be given any one of three
different levels of force feedback. The higher the level, the greater
the reduction in speed for a given lever stroke as resistance
rises. This means that the operator must move the lever further if
he wishes to maintain the same speed of movement with rising
resistance.
/ No force feedback
FN Normal level of force feedback
FH High level of force feedback
FL Low level of force feedback
The force feedback function is not available for directly operated
valves.
LA - Lift load normally on A-port only.
LB - Lift load normally on B-port only.
Flow rate (%) Force feedback
Lever stroke (%)
Light
load
Heavy
load
Choice of spool
F
A B
F
A B
P T
A B
P T
F
31
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Pressure compensator / load-hold check valve [66]
When there are demands for very good simultaneous-operating
characteristics or intensive, multi-section operability and respon-
siveness, individual spool-sections in the L90LS can be equipped
with integral pressure-compensators. Sections so equipped are
not then influenced by other simultaneously-operated machine
functions, regardless of the variations in loads, provided there is
sufficient pump capacity.
Responding to the instantaneous value of the load signal, the
pressure compensator regulates continuously the flow through
the spool to maintain a constant pressure-differential between
the pump and service-port sides of the spool. This results in a
constant flow to the consumer for a given lever stroke, regardless
of the load pressure or any activity in other spool sections.
The compensator is available in a standard design with code
K, as well as KL with a lower setting, and KH and KX with a
higher setting. KL produces a flow corresponding to 85% of the
standard flow, and is primarily intended for adjusting the flow
requirements of the section. KH and KX produce flows corre-
sponding to 120% and 150% of the standard flow respectively.
The pressure compensators are fast and responsive, and
come with an integrated load-hold check-valve function. If neces-
sary, spool sections with pressure compensators can also be
equipped with feed-reducing valves in the service ports to regu-
late the delivery pressure to the consumer to the desired level.
(V** and T** spool-sections [47] have the same machining
and can be converted easily to accommodate feed-reducing and
port-relief valves according to O**, V** or T**)
/ Section not machined for pressure compensator or
load-hold check valve.
K Standard pressure compensator.
KL Compensator that gives 85% of specified spool’s
nominal flow.
KH Compensator that gives 120% of specified spool’s
nominal flow.
KX Compensator that gives 150% of specified spool’s
nominal flow.
KAS Compensator for systems with flow distribution. In
sections with KAS compensators, the flow take-off is
reduced by the same percentage at maximum flow-
take-off from the pump. With a pressure difference of 20
bar between PX and LS, the flow to the motor ports is
about the same as with a compensator of type KX.
If the same valve contains sections with compensators
of type K, KL, KH or KX, these will be given priority over
sections with KAS compensators in terms of flow take-
off. This makes it easy to establish priority for a specific
function.
KAP Compensator for systems with flow distribution. In prin-
ciple, the KAP compensator works in the same way as
the KAS. The difference is that there is an extra spring
causing the pump to motor port connection to be closed
sooner than the KAS compensator, and sections with
KAS compensators are given priority over sections with
KAP compensators.
N Section equipped with load-hold check valve.
X Section machined for pressure compensator or load-
hold check valve, and plugged.
Damping of pressure compensator [67]
The LS restrictor affects the response of the pressure compen-
sator, and is normally chosen at 0.8 mm.
/ No LS restrictor for compensator.
0.45 Alternative LS restrictor for compensator.
0.6 Alternative LS restrictor for compensator.
0.8 Recommended LS restrictor for compensator.
1.0 Alternative LS restrictor for compensator.
Spool designations [69]
To facilitate optimal customization to meet the criteria of each
individual machine function, the choice of spools is made with
the aid of our computerized specification program. The informa-
tion entered at items 60-66 forms part of the basis for the choice
of spool.
Load pressure (bar)
Load-independent flow with pressure compensator.
q (l/min) Flow rate curves
Spool Section
32
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Flow settings [72]
The strokes of spools controlled by enclosed spool-actuators can
be arrested to limit the maximum flow to service ports
A and B.
/ No flow settings
Qset The valve is supplied with factory-set maximum flows to
the spool section. The settings agree with the specified
flow-requirements to the A and B ports [61 A, B].
QsetA The valve is supplied with factory-set maximum flow to
the spool section. The setting agrees with the specified
flow-requirement to the A port [61 A].
QsetB The valve is supplied with factory-set maximum flow to
the spool section. The setting agrees with the specified
flow-requirement to the B port [61 B].
When setting the flow rates for spool sections not equipped with
pressure compensators in systems fed by variable pumps, the
settings are made with a pressure difference of 15 bar between
the pump pressure at the PX port and the load signal at the PL
port at full flow take-off.
Feed-reducing valve [75]
The L90LS with sections designated *A*, *B*, *C* or *T* at item
[47] is equipped with feed-reducing valves.
Sections designated *A* have feed reduction in the A-port;
Sections designated *B* have feed reduction in the B-port; those
designated *C* have common feed reduction for the A-and B-
ports; those designated *T* have individually adjustable feed
reduction for the A-port and B-port.
Feed reduction is used for system functions that require a
lower maximum pressure compared with the normal working
pressure of the system. The feed-reducing valve, which is step-
lessly adjustable from 25 to 330 bar, reduces the delivery pres-
sure in the service port to the pre-set level.
Through the use of feed-reducing valves, the delivery pres-
sure can be limited without consuming any more than a pilot flow
(<2 l/min).
For feed reduction to be installed, the section must be
equipped with a pressure compensator. Since the feed-reducing
valve is a 2-way valve, pressure shocks that arise after the feed-
reducing valve must be limited with the aid of a port relief valve.
The pressure setting on the port relief valve should be as close
as possible to the setting on the feed-reducing valve, although at
least 10 bar higher.
Setting of feed reduction in the A-port [75A]
Setting values for the A-port are from 25 to 330 bar.
Setting of feed reduction in the B-port [75B]
Setting values for the B-port are from 25 to 330 bar.
q
m
(l/min) Reduction characteristics
P
red
(bar)
P
red
= reduced pressure
q
m
= flow rate in service port
Spool Section
33
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Port relief and/or anti-cavitation valves [76 A, B]
In spool sections designated **T [47], the cartridge can be used
as a combined port-relief and anti-cavitation valve in the service
ports to protect the valve and consumer from high system pres-
sure and pressure surges.
The cartridge is a direct-acting pressure relief valve with a
very fast opening sequence and good pressure characteristic.
The interchangeable cartridge is factory set. The make-up func-
tion enables oil to flow from the tank gallery to the service-port
side in the event of negative pressure in the service ports, in
order to prevent cavitation.
/ Section not machined for port relief valves.
X2 Section machined for port relief valve. Service port open
to tank.
Y2 Section machined for port relief valve. Connection
service ports to tank blocked with plug.
N2 Service ports of section equipped with anti-cavitation
valve.
50-350 Standard pressure settings (in bar) for port relief valves
in A- or B-ports:
50, 63, 80, 100, 125, 140, 160, 175, 190, 210, 230,
240, 250, 260, 270, 280, 300, 320 and 350.
Circuit diagram for pressure relief valve.
∆p (bar) Pressure relief characteristic
q (l/min)
∆p (bar) Make-up characteristics
q (l/min)
Spool Section
Port relief valve
34
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
System functions
The L90LS can be equipped with integrated functions to create
complete system solutions. The load signal from any service port
or spool section can be connected with signal ducts and utilized
to stop or limit the pressure to individual machine functions.
In cranes, this auxiliary controlling concept is implemented
with the aid of the M11 function manifold [90]. Another example
of how the load-signal ducts can be exploited is in the control of
thrust pressure to rock drills, according to the instantaneous rota-
tional torque (rotation-pressure controlled thrust).
System signal lines [80]
SF Valve section equipped with 3 signal lines that can be
connected internally to individual load signals [81] from
service port. Signal line for activation of two-speed func-
tion [82] .
/ No signal lines.
Individual LS connection [81]
/ No LS connection to signal lines. No possibility of
external connection either.
A1B Load signal from port A connected to duct 1.
A1B1 Load signal from both port A and B connected to duct 1.
A1B2 Load signal from port A connected to duct 1.
Load signal from port B connected to duct 2.
A1B3 Load signal from port A connected to duct 1.
Load signal from port B connected to duct 3.
A2B Load signal from port A connected to duct 2.
A2B2 Load signal from both port A and B connected to duct 2.
A2B3 Load signal from port A connected to duct 2.
Load signal from port B connected to duct 3.
A3B3 Load signal from both port A and B connected to duct 3.
AB No connection between load signal and signal ducts.
AB2 Load signal from port B connected to duct 2.
AB3 Load signal from port B connected to duct 3.
The load signal from more than one section can be connected to
the same duct. A check valve in each section prevents backward
transmission of the load signal from the ducts into individual
sections.
In addition to connection with the signal ducts, the load signal
is also available for external connection at the base of the valve.
SF – System signal line
B A
LSB
LSA
3
2
1
T
P
LS
T
LS
A1B3 A2B
Two speed line
Signal lines
LSB
LSA
LSB
LSA
LSB
LSA
LSB
LSA
A2B2 AB
AB2 A1B
LSB
LSA
LSB
LSA
LSB
LSA
LSB
LSA
LSB
LSA
A1B2 A2B3 AB3
Spool Section
35
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Two-speed function [82]
Any number of spool sections in the L90LS can be furnished with
a two-speed function to enable switching between performance
and precision work with machines such as cranes and skylifts.
The two-speed function is activated with the aid of the M10
or M11 function manifold [90]. Activation reduces the flow to the
consumer as indicated below:
QR2 Flow to consumer reduced to 20% of normal flow.
QR3 Flow to consumer reduced to 30% of normal flow.
QR4 Flow to consumer reduced to 40% of normal flow.
QR5 Flow to consumer reduced to 50% of normal flow.
/ No flow reducing.
N.B.
When a spool section is equipped with a two-speed function,
the pressure compensator in the section does not have a load-
hold check valve function. For this reason, overcentre valves
might required for the controlled actuator.
Internal connection of service port [85]
Thanks to the internal service-port connections, system solutions
employing function manifolds that require the service port to
be used by the manifold can be integrated without the need for
external piping.
M Gives internal service-port connection downstream of
the spool section.
A013 Gives internal service-port connection both downstream
and upstream of the spool section.
/ No internal service-port connection
Connectors
Connectors are not included with spool actuators, and should be
ordered separately as per the lists below or ordered from your
local connector supplier.
Spool actuators EC, ECH, ECHL, ECS [50]
Suitable connectors for option A in pos [56] are:
AMP Junior-Timer type C, 963040-3,
Bosch 1 928 402 404.
The connector also fit pump-unloading function BEN [22]
and function manifold M10, M11, M12, M13, M13B, M17 [90].
Suitable connectors for option D in pos [04] are:
Deutsch type DT06-2S.
For available connector kits from MCDE, see catalogue HY17-
8558/UK.
Spool actuator ECH, ECHL, ECS [50]
Suitable connectors for option D in pos [56] are:
Deutsch type DT06-2P
Normal
QR4
QR2
q (%) Flow
Lever stroke (%)
Diagram shows curves for:
Normal flow.
Flow with QR4 activated.
Flow with QR2 activated.
Sectional manifold with internal connection of service ports to
downstream function manifold.
Spool actuator ACE, ACEF [50]
Suitable connector type B EN 175301-803 (DIN 43650)/ISO
6952.
Complete connector sets can be ordered on following kit numbers :
Quantity Kit No
1 off 9125 9551 00
10 off 9125 9551 10
25 off 9125 9551 25
50 off 9125 9551 50
100 off 9125 9551 99
Function manifold M14, M16 [90].
Suitable connector type A EN 175301-803 (DIN 43650)/ISO 4400.
Complete connector sets can be ordered on following kit number:
Quantity Kit No
1 st 9121 5829 09
A B
M
Spool Section
36
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
Function manifolds [90-99]
The L90LS can be equipped with function manifolds that enable
complete system solutions to be integrated into the valve.
Standard function manifolds are available for overload protec-
tion, two-speed function, float position, priority for steering and
brakes, etc. In addition to the standard units, we custom-build
function manifolds to meet special system criteria. Please contact
Parker for further information.
M10 Function manifold with load signal drainage and two
speed function. The two-speed function is activated via
an electric on-off valve. The pump pressure actuates the
compensators, reducing the flow to the motor port. This
produces a speed reduction in spool sections fitted with
QR2, QR3, QR4 or QR5 [82]. Load signal draining can
be used to limit the moment of load. Actuation can be
prevented by draining the load signal to the tank from one
or more spool sections via electric on-off valves. In this
way, for example, the functions that increase the moment
of load can be stopped when the machine is operated
to overload. This requires system signal lines SF [80] to
be machined in all spool sections and there must be an
individual LS connection [81] in the spool sections using
load signal drainage. To stop tensile loads, however, there
must be an over-centre valve between the valve and the
cylinder.
M11 Function manifold with load signal drainage and two-
speed function and the possibility of higher system
pressure on speed reduction. The manifold has the
same functionality as M10, with an additional pressure
relief valve affecting the pressure level from the load
signal to the pump. This makes it possible to increase the
system pressure when the speed is reduced.
M12 Function manifold with float position function for
preceding spool section. The motor ports in the section
can be connected to the tank via an electric on-off valve,
independently of the spool position. This can be done
individually for motor port A or B or for both motor ports.
The on-off valves can be selected as normally closed or
normally open, and if a motor port will never be connected
to the tank via the manifold, a cavity plug is selected. The
preceding spool section must have a side port connection
M [85].
M13 Function manifold for regenerative function with over-
centre valves. This manifold replaces the end section and
is connected to the motor ports of the preceding section
via side port connection M [85]. In its basic version, the
M13 manifold includes a switching function for regenera-
tive operation, passing return oil from the cylinder either to
the tank via the spool in the adjacent section or regenera-
tively back to the cylinder (to the piston side). In this case,
the flow is added to the pump flow, producing regenera-
tive operation with a large flow to the cylinder. The piston
side of the cylinder must be connected to motor port A.
The regenerative function is switched on and off with a
solenoid valve which uses the pressure in motor port B to
set the switching spool to regenerative mode. There are
two over-centre valves in the manifold, one for each motor
port. The preset opening pressure is approx. 260 bar and
the pilot ratio is 3:1.
The spool in the spool section must contain a leak
channel, preferably type Dm1, otherwise there is a
risk that insufficient pressure will be built up to operate
the regenerative spool. If there is insufficient pressure,
the function will start in normal mode and will switch
to regenerative mode, involving a powerful thrust. If a
different spool type is used, with a greater pressure drop
throughout the spool stroke, there is a risk that the pres-
sure levels will be so high that it will be difficult to start the
function.
As well as the basic version, the manifold is available
with two-speed function QR [92], internal pilot pressure
supply PSI25 [92] for electrohydraulic spool controllers or
external pilot pressure supply PS25 [92] for taking pilot
pressure for external consumers. The ordinary motor
ports in the spool section are plugged and the cylinder is
instead connected to the corresponding ports of size G
3/4 in the M13 manifold.
M13B Function manifold for regenerative function with
over-centre valves, but with higher flow capacity than
M13. This manifold has the same functions as M13, but
has been developed further with larger over-centre valves
for higher flows. The over-centre valves have a preset
opening pressure of 280 bar. The pressure drop from
port B to port A at 250 [l/min] is approx. 53 bar for M13B,
compared to approx. 125 bar for M13.
M14 Function manifold for controlling pressure in
preceding spool section. This manifold can control the
pressure in the motor ports in adjacent spool sections to
a variable level lower than any feed reducing valve [75].
This is done using an electrically controlled pressure relief
valve in the load signal channel. Depending on the config-
uration, the pressure can be controlled separately for
each motor port or jointly to pressure levels between 20
and 285 bar. You can choose whether the pressure control
is connected all the time or is switchable using an electri-
cally controlled on-off valve. The manifold must be placed
after a spool section with side port connection, M [85].
The sections must also contain individual LS connections
[81]. The system signal channel, SF [80] no. 2, connects
the manifold with the spool section.
M15 Function manifold for pump channel division between
inlet and end section. This manifold separates the pump
and load signal channel from the inlet and end section.
Preceding sections are supplied with pump oil and pres-
sure relief is via the inlet section. In the following sections,
pressure relief is via a preset pressure relief valve in the
M15 manifold, and pump oil is supplied from the end
section. Load signals for the pump are taken from the inlet
section to the preceding spool sections and from the M15
manifold to the following spool sections.
M16 Function manifold controlling the pressure in the
preceding and following spool sections. This manifold
can control the pressure in the motor ports in adjacent
spool sections to a variable level lower than any feed
reducing valve [75]. The pressure in the preceding spool
sections can be controlled in motor port A, and the pres-
sure in the following spool sections can be controlled
in motor port B. This is done using variable electrically
controlled pressure relief valves in the load signal chan-
nels. The pressure level can be set between 20 and 285
bar. The manifold is placed between two spool sections
containing side port connections M and A013 [85]. The
sections must also contain individual LS connections [81].
The system signal channel, SF [80] no. 1, connects the
manifold with the preceding sections and system signal
channel no. 3 connects the following sections.
M17 Function manifold for draining the motor ports in
sections placed side by side. The preceding spool
sections must contain side port connections M [85] and
the following spool sections may contain side port connec-
tions A013 [85] if draining is required there. Draining to the
tank uses an electrically controlled valve. When the valve
is closed, there is no leakage between the motor ports
of non-return valves integrated in the manifold. Maximum
drainage flow per motor port is 10 [l/min].
Function Manifolds
37
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
(0.98)
Ø25
172 (6.77)
22 (0.87)
46 (1.81)
(1.06)
Ø27
207 (8.15)
22 (0.87)
53 (2.09)
Levers for open spool-actuators
Levers M7 and M71 are made of steel with an anti-rust surface
treatment, and fitted with a knob of black plastic. The knob on the
M71 lever has a top window for the insertion of a symbol. The
lever kits are delivered complete with pin sets for mounting to the
valve.
Direct lever for enclosed spool-actuators
Lever for directly operated spool-actuators with enclosed spool-
end, and for remote controlled spool-actuators that have a facility
for a supplementary local lever for direct control.
The ML1 lever is made of steel and has an anti-rust surface
treatment. The lever knob is of black plastic and has a top window
for the insertion of a symbol. The lever kit consists of a knob, the
lever shaft and a lock nut.
Levers are not supplied with the valve and must
therefore be ordered separately.
Ordering number Designation
9122 1780-08 M7
9122 1780-11 M71
8234 9390-01 ML1
Lever M7 Lever M71
Lever ML1
24
(0.94)
169 (6.65)
21
(0.83)
(inch)
Direct Levers
38
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
176 (6.93)
127 (5.00)
94 (3.70)
70 (2.76)
67 (2.64)
38 (1.50)
164 (6.46)
47 (1.85)
0
0
LS
PX
PL
LSP
0
0
0
(2.40)
61
74
(2.91)
40 (1.57)
55 (2.17)
40
(1.57)
L
147 (5.79)
90 (3.54)
42 (1.65)
1 (0.04)
TP
T2
T3
126 (4.96)
T1
P1
90 (3.54)
86 (3.39)
81(3.19)
45 (1.77)
42 (1.65)
9 (0.35)
19 (0.75)
35 (1.38)
0
P2
79 (3.11)
0
43 (1.69)
53 (2.09)
94 (3.70)
15 (0.59)
35 (1.38)
41
(1.61)
24
(0.94)
0
0
0
55
(2.17)
83
(3.27)
68
(2.68)
87
(3.43)
PF
PS
313 (12.32) max
133 (5.24)
130
(5.12)
27
(1.06)
0
With MU section, the L dimension
is reduced by 23 mm (0.91)
With IP section, the L dimension is
reduced by 25 mm (0.98)
For connection thread, please refer
to page 7.
No. of L L
sections
mm inch
1 169 (6.65)
2 209 (8.23)
3 249 (9.80)
4 289 (11.38)
5 329 (12.95)
6 369 (14.53)
7 409 (16.10)
8 449 (17.68)
9 489 (19.25)
10 529 (20.83)
11 569 (22.40)
12 609 (23.98)
Dimensional drawings
(inch)
E
Inlet section
CFC, LS, (LS2, AS, AS2)
End section
US
Service port B
Service port A
39
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
84 (3.31)
57 (2.24)
26 (1.02)
0
72 (2.83)
0
58 (2.28)
73 (2.87)
PL
PX
LS
38 (1.50)
148 (5.83)
126 (4.96)
108 (4.25)
90 (3.54)
81 (3.19)
45 (1.77)
42 (1.65)
0
19 (0.75)
19 (0.75)
T1
P1
38 (1.50)
52
(2.05)
5
(0.20)
10
(0.39)
PF
RX
TP
T2
0
28 (1.10)
37 (1.46)
64 (2.52)
104 (4.09)
0
0
31
(1.22)
47 (1.85)
55 (2.17)
57 (2.24)
162
(6.38)
102
(4.02)
75
(2.95)
27
(1.06)
0
TP
PS
113 (4.45)
111 (4.37)
P2
76 (2.99)
T2
33 (1.30)
22 (0.87)
0
LSP
64 (2.52)
74 (2.91)
0
40
(1.57)
75
(2.95)
127
(5.00)
167
(6.57)
(inch)
E
Dimensional drawings
19
(0.75)
49
(1.93)
0
0
45
(1.77)
90 (3.54)
0
29
(1.14)
77
(3.03)
0
25 (0.98)
29 (1.14)
79 (3.11)
28 (1.10)
P1
T1
PL
Inlet section
IP
Inlet section
CA, CL
Spool/End section
MU
Service
port A
Service
port B
40
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
37 (1.46)
26,5 (1.04)
22 (0.87)
Ø5 (0.20)
Ø5 (0.20)
17 (0.67)
6,6 (0.26)
Ø14 (0.56)
37 (1.46)
26.5 (1.04)
33 (1.30)
33 (1.30)
106 (4.17)
78 (3.07)
Spool actuators with open spool end
C
B3
FD
ACP
LM
LU
Dimensional drawings
Activate P-A, B-T: 6 mm Activate P-B, A-T: 6 mm
Maximum spool stroke
41
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
104 (4.09)
88 (3.46)
122 (4.80)
44 (1.73)
71 (2.80) max
44 (1.73)
Spool actuators with closed spool end
Spool actuators with open spool end
ACE/ACEF
CH/CHX
CHB3
Dimensional drawings
42
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
71 (2.80) max
97 (3.82)
105 (4.13)
74 (2.91) max
49 (1.93) max
PC/PCH, B-sidePC/EC/ESC, A-side
EC/ECS/ECH/ECHL, B-side
PCH/ECH/ECHL, A-side
Spool actuators with closed spool end
Dimensional drawings
43
Parker Hannifin
Mobile Controls Division Europe
Borås, Sweden
Mobile Directional Control Valve
L90LS
Catalogue HY17-8504/UK
© 2010 Parker Hannin Corporation. All rights reserved. Catalogue HY17-8504/UK, POD, 11/2010, ZZ
Your local authorized Parker distributor
Parker Worldwide
EMEA Product Information Centre
Free phone: 00 800 27 27 5374
(from AT, BE, CH, CZ, DE, DK, EE, ES, FI, FR, IE, IL,
IS, IT, LU, MT, NL, NO, PL, PT, RU, SE, SK, UK, ZA)
US Product Information Centre
Toll-free number: 1-800-27 27 537
www.parker.com
Ed. 2010-11-16
Europe, Middle East, Africa
AE – United Arab Emirates,
Dubai
Tel: +971 4 8127100
parker.me@parker.com
AT – Austria, Wiener Neustadt
Tel: +43 (0)2622 23501-0
parker.austria@parker.com
AT – Eastern Europe, Wiener
Neustadt
Tel: +43 (0)2622 23501 900
parker.easteurope@parker.com
AZ – Azerbaijan, Baku
Tel: +994 50 2233 458
parker.azerbaijan@parker.com
BE/LU – Belgium, Nivelles
Tel: +32 (0)67 280 900
parker.belgium@parker.com
BY – Belarus, Minsk
Tel: +375 17 209 9399
parker.belarus@parker.com
CH – Switzerland, Etoy
Tel: +41 (0)21 821 87 00
parker.switzerland@parker.com
CZ – Czech Republic, Klecany
Tel: +420 284 083 111
parker.czechrepublic@parker.com
DE – Germany, Kaarst
Tel: +49 (0)2131 4016 0
parker.germany@parker.com
DK – Denmark, Ballerup
Tel: +45 43 56 04 00
parker.denmark@parker.com
ES – Spain, Madrid
Tel: +34 902 330 001
parker.spain@parker.com
FI – Finland, Vantaa
Tel: +358 (0)20 753 2500
parker.nland@parker.com
FR – France, Contamine s/Arve
Tel: +33 (0)4 50 25 80 25
parker.france@parker.com
GR – Greece, Athens
Tel: +30 210 933 6450
parker.greece@parker.com
HU – Hungary, Budapest
Tel: +36 1 220 4155
parker.hungary@parker.com
IE – Ireland, Dublin
Tel: +353 (0)1 466 6370
parker.ireland@parker.com
IT – Italy, Corsico (MI)
Tel: +39 02 45 19 21
parker.italy@parker.com
KZ – Kazakhstan, Almaty
Tel: +7 7272 505 800
parker.easteurope@parker.com
NL – The Netherlands, Oldenzaal
Tel: +31 (0)541 585 000
parker.nl@parker.com
NO – Norway, Asker
Tel: +47 66 75 34 00
parker.norway@parker.com
PL – Poland, Warsaw
Tel: +48 (0)22 573 24 00
parker.poland@parker.com
PT – Portugal, Leca da Palmeira
Tel: +351 22 999 7360
parker.portugal@parker.com
RO – Romania, Bucharest
Tel: +40 21 252 1382
parker.romania@parker.com
RU – Russia, Moscow
Tel: +7 495 645-2156
parker.russia@parker.com
SE – Sweden, Spånga
Tel: +46 (0)8 59 79 50 00
parker.sweden@parker.com
SK – Slovakia, Banská Bystrica
Tel: +421 484 162 252
parker.slovakia@parker.com
SL – Slovenia, Novo Mesto
Tel: +386 7 337 6650
parker.slovenia@parker.com
TR – Turkey, Istanbul
Tel: +90 216 4997081
parker.turkey@parker.com
UA – Ukraine, Kiev
Tel +380 44 494 2731
parker.ukraine@parker.com
UK – United Kingdom, Warwick
Tel: +44 (0)1926 317 878
parker.uk@parker.com
ZA – South Africa, Kempton Park
Tel: +27 (0)11 961 0700
parker.southafrica@parker.com
North America
CA – Canada, Milton, Ontario
Tel: +1 905 693 3000
US – USA, Cleveland
(industrial)
Tel: +1 216 896 3000
US – USA, Elk Grove Village
(mobile)
Tel: +1 847 258 6200
Asia Pacific
AU – Australia, Castle Hill
Tel: +61 (0)2-9634 7777
CN – China, Shanghai
Tel: +86 21 2899 5000
HK – Hong Kong
Tel: +852 2428 8008
IN – India, Mumbai
Tel: +91 22 6513 7081-85
JP – Japan, Fujisawa
Tel: +81 (0)4 6635 3050
KR – South Korea, Seoul
Tel: +82 2 559 0400
MY – Malaysia, Shah Alam
Tel: +60 3 7849 0800
NZ – New Zealand, Mt Wellington
Tel: +64 9 574 1744
SG – Singapore
Tel: +65 6887 6300
TH – Thailand, Bangkok
Tel: +662 717 8140
TW – Taiwan, Taipei
Tel: +886 2 2298 8987
South America
AR – Argentina, Buenos Aires
Tel: +54 3327 44 4129
BR – Brazil, Sao Jose dos
Campos
Tel: +55 12 4009 3500
CL – Chile, Santiago
Tel: +56 2 623 1216
MX – Mexico, Apodaca
Tel: +52 81 8156 6000
VE – Venezuela, Caracas
Tel: +58 212 238 5422
