4WEH22C7X/6EG24N9DAL

The 4WEH22C7X/6EG24N9DAL valve is manufactured by Bosch Rexroth within the WEH Directional Spool Valves series. It shifts flow paths in hydraulic automation systems so actuators receive the required pressure and return lines stay clear. The nominal size 25 frame sets the passage dimensions for machinery that needs compact yet high-capacity control. A maximum flow of 450 l/min through symbol C ensures cylinders or motors receive sufficient oil volume during rapid moves. The valve withstands 280 bar at ports P, A, and B, allowing it to operate on common high-pressure power units. An ISO 4401 porting pattern lets it fit standardized subplates without rework. Pilot oil is taken internally from X and returned externally through Y, stabilizing the spool against pressure spikes. The spool begins to shift once 4.5 bar is present in the pilot gallery, and the 15.28 cm³ pilot volume defines the amount of oil needed for each changeover.

For reliable service, the pilot stage tolerates pressures up to 210 bar so control lines remain intact during peak demand. Port T is rated for 250 bar, allowing back-pressure in return lines without forcing unplanned spool movement, while port Y in direct current operation accepts up to 210 bar to drain pilot flow safely. The hydraulic fluid must meet ISO 4406 cleanliness class 20/18/15, preventing wear in the precision-ground lands. Installation calls for six M12×60 screws in accordance with ISO 4762, providing even clamping over the gasket. Each screw is tightened to 100 Nm with a ±10 percent margin to keep sealing surfaces aligned. A surface coating limited to 100 µm safeguards the body against corrosion yet avoids interfering with manifold fit. These characteristics support consistent switching behavior in automated hydraulic circuits.