These valves are supplied with a positioning sensor monitoring the valve spool position (in case of pilot operated directional control valves, the main spool is monitored). The switching position is indicated with a binary signal.
The valves of sizes ISO 4401-03 (CETOP 03) and ISO 4401-05 (CETOP 05) are direct operated while sizes CETOP P05, ISO 4401-07 (CETOP 07) and ISO 4401-08 (CETOP 08) are pilot operated.