L90LS

Proportional, Load Sensing, Pre-compensated

The LS90L 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 lpm.The valve can be given excellent simultaneous operating characteristics, which enable several machine functions to be operated responsively at the same time, regardless of the sizes of individual loads.

To facilitate precise, customisation for different applications, the L90LS is of a 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.

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-inlet, be flanged to a larger valve such as the K170LS or K220LS to give a compact, unitised 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 remote controlled spool actuators can be fitted with a supplementary direct lever to give a dual control and/or emergency facility. The wide range of actuating options gives the machine designer great freedom in terms of control criteria and component location.

Spool sections and flow rates

The L90LS can be supplied in combinations of 1 - 12 spool sections or in combination with special function manifolds fitted between spool sections. The maximum recommended flow rate per spool section is 125 lpm or 90 lpm when equipped with a pressure compensator.

Optional functions

• a by-pass function in the lnlet section for systems fed by fixed displacement pumps
• a pump unloading function that blocks the pump inlet mwhen activated, thus enabling an emergency stop function
• section specific pressure compensation
• 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 eliminate micro-sinking
• a built in pilot pressure function in the end section
• flow distribution between different sections at maximum flow take off from the pump.

Email: sales@hsac.co.nz