Parker’s robust and durable pilot operated directional control valves series D31DW, D31NW, D*1VW are almost universally applicable and ensure a reliable operation. A wide variety of spools and options allows to design an unlimited number of hydraulic circuits. The pilot operated directional control valves are available in 4 sizes: D31DW standard and D31NW high flow in NG10/NFPA D05, D41VW in NG16/NFPA D07, D81VW for port diameter up to 26 mm and D91VW for port diameter up to 32 mm in NG25/NFPA D08 and D111VW in NG32/NFPA D10. All sizes are optionally available with position control or as explosion-proof version according to ATEX and IECEx. Markets: – Industrial Features/Benefits: – Proven robust design that represents our long-term experience in hydraulics – Wide range of spools – suitable for almost all hydraulic circuits – High functional limits – low forces resulting in safe operation also at high flow rates – Low pressure drop – resulting in low energy losses in operation – Short delivery time – no warehousing necessary – Optionally with position control – Optionally without manual override – Optionally as explosion-proof version Applications: – Suitable for general hydraulic applications Explosion-proof versions The valves are not only ATEX certified explosion proof class is Ex e mb II T4 Gb for use in zone 1 and 2 but also equipped with IECEx compliant solenoids which are certified in accordance with IECEx standard for equipment class 2 G. All explosion-proof solenoids are DC design. The valves for AC operate with integrated rectifier. Note: The minimum pilot pressure must be ensured for all operating conditions of the directional valve. Additionally spools with a P to T connection in the deenergized position need an external pressure supply external inlet or an integral check valve.