Pilot-operated directional control valve
AssigneeHydac Fluidtechnik GmbH
InventorsFrank SCHULZ, Markus BILL
Life of this patent
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Abstract
The invention relates to a pilot-controlled directional control valve, in particular a directional poppet valve, comprising a valve housing (10), at least three fluid connection points (12, 14, 16) with a main control stage (18) and a pilot control stage, characterized in that a further fluid-controlling intermediate stage (22) is arranged between the main control stage (18) and the pilot control stage (20) and that the main control stage (18) comprises a longitudinally movable main control piston (24) and the pilot control stage a longitudinally movable pilot control piston (26).
Claims10
A pilot-operated directional control valve, in particular directional poppet valve, comprising a valve housing (10), with at least three fluid connection points (12, 14, 16), with one main control stage (18) and one pilot control stage (20), characterized in that a further fluid-controlling intermediate stage (22) is disposed between the main control stage (18) and the pilot control stage (20), and that the main control stage (18) is provided with a longitudinally moveable main control piston (24) and the pilot control stage (20) is provided with a longitudinally moveable pilot control piston (26).
Dependencies are inferred from the claim text.