Direct operated proportional spool valve with 4 connections in 5-chamber system. Precise spool fit, low leakage, long service life time. The volume flow adjustment takes place by a Wandfluh ­proportional solenoid. Proportional to the solenoid current, the spool stroke, the spool opening and the valve volume flow increase. For the control, Wandfluh proportional amplifiers are available (see register 1.13). ​ ​ ​

Proportional spool valve

Flange construction

Qmax = 42 l/min

4 volume flow levels

QN max = 32 l/min

pmax = 350 bar

Application

Proportional spool valves are perfectly suitable for demanding tasks due to the high resolution, large volume flow and low hyste­resis. The applications are in the industry as well as in the mobile hydraulics for the smooth control of hydraulic actuators. Some ­examples: control of the rotor blades of wind generators, forestry and earth moving machines, machine tools and paper production machines, simple position controls, robotics and fan control. ​ ​ ​ ​ ​ ​