Bosch Rexroth | 4WEH16J7X6EW110N9ETDALB10V
4WEH16J7X/6EW110N9ETDAL/B10V
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The 4WEH16J7X/6EW110N9ETDAL/B10V directional spool valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for hydraulic automation where precise flow direction is required. This NG16 size valve establishes standardized port spacing, while the ISO 4401-08-08-0-05 porting pattern matches common subplates. A fluid cleanliness level of ISO 4406 20/18/15 must be maintained to protect internal surfaces. The main pressure ports P, A, and B tolerate up to 280 bar so the unit can operate in medium-pressure circuits. Internal pilot oil supply designated ET eliminates the need for an external feed, and internal pilot oil return marked T routes drained oil back through the housing. For the three-position spring-centered spool, the pilot chamber holds 5.72 cm³, a volume that influences response time.
The pilot stage accepts up to 250 bar, and it begins to shift the spool when at least 14 bar is available, providing a defined control range. When the pilot oil is routed back through channel Ac, the return pressure must stay below 160 bar to avoid counteracting the actuator. If the drain is taken externally through port Y, the line may carry as much as 250 bar without affecting function. A 1.0 mm throttle insert restricts pilot flow to stabilize actuation speed. Mechanical attachment uses four M10 × 60 screws, each tightened to 58 Nm, ensuring the body seats firmly on the subplate. FKM seals resist common hydraulic fluids and temperature variations, while a weight of 8.9 kg allows installation by a single technician.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Max Operating Pressure (p, A, B)
280 bar
Maximum Pilot Pressure
250 bar
Minimum Pilot Pressure (spring-centered)
14 bar
Mounting Screw Torque
58 Nm
Mounting Screws
4x M10 x 60
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (ET)
Pilot Return Max Pressure (internal, Ac)
160 bar
Pilot Volume (3-spool Spring-centered)
5.72 cm3
Port T Max Pressure (external Y)
250 bar
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
FKM
Size
NG16
Throttle Insert Diameter
1.0 mm
Weight (two Solenoids, Spring-centered)
8.9 kg
1620 Old Apex Road
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