Page 3 - Parker - L90LS Mobile directional control valve canadian build program

General Information

The L90LS is a stackable, multi-section, load-sensing, The maximum recommended flow rate per spool
pressure compensated directional valve for mobile section is 150 l/min, or 120 l/m when equipped with
machines such as cranes, forklift trucks, platform a pressure compensator.
trucks, excavators and harvesters as well as oil field
applications such as drilling, pipe handling, coiled Examples of optional functions
tubing and pressure pumping. It is designed for Depending on the application and operating criteria
working pressures of up to 320 bar and a maximum of the machine, a wide range of common, section- or
pump flow of 200 l/min. The valve can be given port-specific optional functions can be integrated
excellent simultaneous-operating characteristics, into the L90LS. Some examples not listed in this
which enable several machine functions to be program include:
operated responsively at the same time, regardless of
the sizes of individual loads. • a pump-unloading function that blocks the pump
inlet when activated, thus enabling an emergency-
To facilitate precise customization for different stop function to be incorporated into the system.
applications, the L90LS is of wholly modular
construction. Each valve is therefore built to order, • port-specific force-feedback functions that enable
so that it incorporates exactly the valve functions and force sensing and also provide a hydraulic ramp
values needed to control the given machine in an function.
optimal way.
• a load-signal copying function to eliminate micro-
Wide range of spool actuators sinking of actuator
The spools in the L90LS can be actuated directly
by means of levers or remotely by pneumatic, • section-specific two-speed functions that enable
electro-pneumatic, hydraulic or electro-hydraulic switching between performance and precision work
remote control. Some of our remote controlled in machines such as cranes and skylifts.
spool actuators can be fitted with a supplementary
direct lever to give a dual-control and/or emergency • priority for machine functions such as brakes and
facility. The wide range of actuating options gives the steering.
machine designer great freedom in terms of control
criteria and component location. • flow sharing for systems that require equal speed
relationship of the selected functions, but at
Spool sections and flow rates a reduced speed, even at pump over-demand
The L90LS can be supplied in combinations of conditions.
1-12 spool sections or in combination with special
function manifolds fitted between spool sections.
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