Bosch Rexroth | H-4WEH16R7X6EW110N9ES2K4B10D3
H-4WEH16R7X/6EW110N9ES2K4/B10D3
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The H-4WEH16R7X/6EW110N9ES2K4/B10D3 valve is manufactured by Bosch Rexroth as part of the WEH Directional Spool Valves series and is intended to direct flow in hydraulic automation circuits. It uses a 4-way configuration to route pressure and return lines, and its nominal size of NG16 suits mid-range manifolds. A spool marked with the R symbol sets passage geometry that permits up to 300 l/min, establishing the performance limit for this model. Ports P, A, and B withstand a maximum operating pressure of 350 bar, enabling operation with high-pressure pumps. The valve mounts on subplates following the ISO 4401-07-07-0-05 pattern for interchangeability. Spring centering requires a minimum pilot pressure of 14 bar to shift the spool accurately. Hydraulic fluid must satisfy ISO 4406 class 20/18/15 to minimize wear on moving parts.
Pilot control pressure can rise to 250 bar without overstressing the housing, while the secondary D3 port is limited to 45 bar to protect downstream components. Port Y accepts up to 160 bar, allowing external drainage during peak loads. A 1.0 mm throttle insert moderates pilot flow for smoother response, and discharge control coded S2 provides adjustable switching times. Corrosion protection is ensured by a surface coating not exceeding 100 µm. Electrical actuation is handled through a DIN EN 175301-803 K4 connector for quick coil replacement, and a concealed N9 manual override lets technicians reposition the spool when power is unavailable.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
D3 Secondary Pressure
45 bar
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
350 bar
Max Pilot Pressure
250 bar
Max Port Y Pressure (ac)
160 bar
Min Pilot Pressure (spring-centered)
14 bar
Nominal Size
NG16
Performance Limit (symbol R)
300 l/min
Porting Pattern
ISO 4401-07-07-0-05
Spool Symbol
R
Surface Coating Thickness
100 µm Max
Switching Time Adjustment
Discharge Control (S2)
Throttle Insert Diameter
1.0 mm (B10)
Way Configuration
4-Way
1620 Old Apex Road
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