4WEH 16/22 – Direction Control Valves Bosch Rexroth
The Bosch Rexroth 4WEH 16 and 4WEH 22 are heavy-duty, two-stage directional spool valves engineered for high-performance industrial hydraulic systems. They serve as the primary control mechanism to start, stop, and reverse the direction of volumetric fluid flow. These valves are essential when the system’s flow rates and operating pressures are too high for direct-acting solenoid valves to shift safely or efficiently.
- Operating Pressure : High Performance Range
- Application : Industrial & Mobile Systems
About this item
The Bosch Rexroth 4WEH 16 and 4WEH 22 series are pilot-operated directional spool valves designed to control the start, stop, and direction of fluid flow in high-demand industrial hydraulic systems. Activated electro-hydraulically via an integrated pilot solenoid valve, these heavy-duty valves handle high flow rates and extreme pressures that direct-acting solenoid valves cannot manage alone.
| Attribute | 4WEH 16 (Size NG16) | 4WEH 22 (Size NG22) |
|---|---|---|
| Interface Standard | CETOP 7 / ISO 4401-07 | CETOP 8 / ISO 4401-08 |
| Max Flow Rate | Up to 300 L/min | Up to 450 L/min |
| Max Operating Pressure | 350 bar | 350 bar |
| Actuation Type | Electro-hydraulic pilot | Electro-hydraulic pilot |
| Spool Configurations | 4/2-way or 4/3-way | 4/2-way or 4/3-way |
| Centering Options | Spring or pressure centering | Spring or pressure centering |
| Seal Materials | NBR or FKM (Viton) | NBR or FKM (Viton) |
| Fluid Compatibility | Mineral oils, HFC, synthetic esters | Mineral oils, HFC, synthetic esters |
| Modular Options | Stroke limit, inductive switches | Stroke limit, inductive switches |
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