The GSL200 Series are Load Sensing proportional directional valves.
The Load sensing valves are designed to improve the functional characteristics of open center directional valves. They allow a constant flow rate to working ports independent from the load and from the inlet flow rate and thus have a user speed relate only from the position of the spool in all the operating conditions with a consequent improvement in sensitivity and precision of the drive.
To overcome the problem of interference when multiple spools contemporarily working, it has been developed compensated Load Sensing valves. These allow you to operate multiple sections at different load pressure independently to each other and are divided into two main families: the pre-compensated and post-compensated.