The WDPPU valves are direct operated proportional spool valves in cartridge construction which are largely made of steel. The body of the cartridge has been gas-nitro-carburised in accordance with the K8 standard
As a result of the modular structure of the WANDFLUH product range, the spool and poppet valves with the nominal sizes NG4, NG6 and NG10 can be supplemented by simple or redundant switching position
