Bosch Rexroth | 4WEH16Y7X6EW110N9TDA
4WEH16Y7X/6EW110N9TDA
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The 4WEH16Y7X/6EW110N9TDA directional spool valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series and routes pressurized fluid to control actuators in hydraulic automation. The nominal size NG16 sets the interface dimensions so the valve fits manifolds for medium-capacity circuits. A maximum flow rate of 300 l/min supports rapid cylinder movement without excessive pressure loss, while ports P, A, and B tolerate up to 280 bar to suit high-pressure machinery. Port T withstands 250 bar so return lines remain safe during transient spikes. The pilot stage operates with inlet pressure between 14 and 250 bar, giving flexible control from standby to full system pressure. An ISO 4401-07-07-0-05 porting pattern standardizes mounting and simplifies block design. The spool functions with fluid viscosity down to 2.8 mm²/s, maintaining lubrication when oils thin at elevated temperatures.
A maximum ambient temperature of 50 °C allows installation near heat-producing equipment, and hydraulic fluid may reach 80 °C without affecting spool reliability. The valve accommodates oils up to 500 mm²/s viscosity, which supports cold-start operation with thick fluids. Contamination must not exceed ISO 4406 class 20/18/15 to protect precision lands from abrasive wear. A surface coating thickness up to 100 µm resists corrosion in humid plant environments. Functional safety is indicated by a mean time to dangerous failure of 100 years, contributing to long service life. The single-solenoid version weighs 8.5 kg, giving installers manageable mass for line-side replacement tasks.
Technical Specifications
Ambient Temp (max)
50 °C
Fluid Cleanliness Class
20/18/15 (ISO 4406)
Hydraulic Fluid Temp (max)
80 °C
Max Flow
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure
14 bar
Mttfd
100 years
Nominal Size
NG16
Port T Max Pressure
250 bar
Porting Pattern
ISO 4401-07-07-0-05
Surface Coating (max Thickness)
100 µm
Viscosity (max)
500 mm²/s
Viscosity (min)
2.8 mm²/s
Weight (one Solenoid)
8.5 kg
1620 Old Apex Road
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