Setting standards for pilot operated on-/off valves in terms of functional limits and pressure drop, Parker's series D31DW, D31NW, D*1VW are suitable for practically any industrial application. Optionally available as ex-proof version.
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 sp ools - 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.