These directional spool valves are designed as individual valves either for pipeconnection (type SW) or for manifold mounting (type SWP, NSWP) or as valve bank(type SWP, NSWP). Actuation is via directly acting pressure resistant single strokesolenoids (wet armature); type NSWP may feature twin solenoids enabling two speedrates or prop. solenoids which may be combined also with a stroke limitation. Versionswith ATEX-approval are available as well. The individual manifold mounting valvescan be combined with sub-plates enabling pipe connection plus an optional pressurelimiting valve. The valve sections type NSWP can be combined with various optionseither on the pump side e.g. check valves, throttles, or orifices plus orifices or restric-tor check valves on the consumer side.