Bosch Rexroth | 4WEH16HD7XOF6EW110N9ETDAV-CSA
4WEH16HD7X/OF6EW110N9ETDA/V CSA
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The 4WEH16HD7X/OF6EW110N9ETDA/V CSA valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for electro-hydraulic control tasks in automation circuits. It uses electro-hydraulic actuation to shift its spool, allowing remote electrical commands to direct hydraulic flow. A nominal size of 16 (NG16) matches circuits that adhere to the ISO 4401-07-07-0-05 porting pattern, so the valve sits on standardized manifolds without adapters. Subplate mounting supports rapid replacement while keeping pipe runs fixed. Two hydraulic end positions provide on/off switching for supply and actuator lines, and each changeover consumes 11.45 cm³ of pilot oil, a figure that helps designers size pilot accumulators. Stable switching requires at least 14 bar pilot pressure, while the internal X pilot channel starts to open once P pressure reaches 4.5 bar. The pilot stage tolerates up to 250 bar, giving ample margin for high-pressure systems.
The main stage is rated for 350 bar operating pressure, enabling the valve to handle high-force cylinders and motors, and port T withstands up to 315 bar for reliable tank return in counter-pressure situations. A maximum flow of 300 l/min keeps pressure losses low in circuits with large displacement actuators. The hydraulic fluid must stay between 2.8 mm²/s and 500 mm²/s viscosity so the spool lands seal correctly across the full temperature range. Cleanliness must reach ISO 4406 20/18/15 to protect the precision edges from wear and sticking. FKM seals prevent leakage when synthetic or high-temperature fluids are used. Together these limits ensure consistent performance for demanding automation duties without exceeding component stress.
Technical Specifications
Actuation Type
Electro-Hydraulic
Cleanliness Class
ISO 4406 20/18/15
Max Flow
300 l/min
Max Fluid Viscosity
500 mm²/s
Max Operating Pressure
350 bar
Max Pressure Port T
315 bar
Maximum Pilot Pressure
250 bar
Min Fluid Viscosity
2.8 mm²/s
Min P Pressure For X Internal
4.5 bar
Minimum Pilot Pressure
14 bar
Mounting Type
Subplate
Nominal Size
16 (NG16)
Pilot Volume Per Switch
11.45 cm³
Porting Pattern
ISO 4401-07-07-0-05
Seal Material
FKM
Switching Positions
2 (Hydraulic End Position)
1620 Old Apex Road
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