Bosch Rexroth | 4WEH16J7X6EW110N9DAL
4WEH16J7X/6EW110N9DAL
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The 4WEH16J7X/6EW110N9DAL valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. It is intended to direct pressurized fluid in automated hydraulic circuits and is built as a 4/3-way unit with spool symbol J to provide two actuator positions and one centered neutral state. The NG16 nominal size supports a maximum flow of 300 l/min when the J spool is selected, making it suitable for medium-frame power units. Centering is achieved by internal springs, so the spool returns to neutral automatically whenever pilot pressure falls below the required threshold. Because of that design, a minimum pilot pressure of 14 bar and a pilot volume of 5.72 cm³ are necessary to shift the spool reliably. Control oil is introduced and discharged through external X and Y lines, which simplifies tuning of pilot pressure and avoids contamination of the tank line.
The hydraulic end ports (P, A, and B) withstand up to 280 bar while the tank port is limited to 250 bar, allowing the valve to operate in standard high-pressure circuits. Pilot supply circuits may be charged up to 250 bar, providing sufficient margin for fast actuation. The concealed N9 manual override lets maintenance personnel shift the spool mechanically without exposing moving parts during routine checks. All main ports follow the ISO 4401-07-07-0-05 pattern for direct mounting on sub-plates with matching cavities, which streamlines replacement tasks. To protect sensitive servo components downstream, the valve requires oil cleanliness no worse than ISO 4406 20/18/15. Functional safety is supported by a mean time to dangerous failure of 100 years, so scheduled overhaul cycles can align with long-term plant operation.
Technical Specifications
Centering Method
Spring-Centered
Cleanliness Class
ISO 4406 20/18/15
Manual Override
Concealed (N9)
Max Flow (ng16, Symbol J)
300 l/min
Max Pilot Pressure
250 bar
Max Pressure (p, A, B)
280 bar
Max Pressure (t)
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Mttfd (type Weh)
100 Years
Nominal Size
NG16
Pilot Return
Y External
Pilot Supply
X External
Pilot Volume (spring-centered)
5.72 cm3
Porting Pattern
ISO 4401-07-07-0-05
Spool Symbol
J
Way Configuration
4/3-Way
1620 Old Apex Road
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