These directional seated valves type WN and WH use spring loaded ballsas valve elements and therefore do not show any leakage. They are manifold mounting and are available in four sizes. These valves are very compact as the functional valve parts are partly integrated in the solenoidbody. The basic versions are designed as 2/2- and 3/2-way directionalvalves. Whereas 3/3- , 4/3-way functions require two valves to beinstalled on one valve sub-plate.These valves may be directly installed in pipe systems, when equipped withsub-plates enabling pipe connection. Many optional functions incorporatedin these sub-plates e.g. pressure limiting valve or restrictor check valvewiden the field of application for this valve type. The type WN (size 1 only) is more simply designed as type WH making itspricing more competitive but the max. permissible pressure is reduced asthere are no moving seals and the armature cavity is not separately depressurized. Valve banks of these valve type arealso available featuring several valvesconnected in parallel (see type BWNand BWH).