Bosch Rexroth | 4WH16J7X
4WH16J7X/
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The 4WH16J7X/ valve is produced by Bosch Rexroth in the WEH Directional Spool Valves series and is used to redirect hydraulic flow in automated stations. Its NG16 size defines the passage area, while a maximum flow of 300 l/min under symbol J supports high-volume circuits. The unit follows the ISO 4401-07-07-0-05 mounting pattern and fixes to a subplate with M10 × 60 socket head screws specified by ISO 4762. A protective coating limited to 100 µm guards the body from corrosion without altering fit. Cleanliness must meet ISO 4406 (c) 20/18/15 to keep the spool clearance free of abrasive particles. Ports P, A, and B withstand up to 280 bar, enabling service in high-pressure loops, and the 7.3 kg mass resists vibration on manifold faces.
Ports T and Y tolerate 250 bar, allowing elevated back-pressure in return and drain lines. External pilot connections on X and Y separate control oil from the main flow for stable actuation. A pilot flow of 35 l/min is needed for the shortest switch time, and the spring-centered version requires 5.72 cm³ of pilot oil to complete a stroke. The spool shifts reliably when at least 14 bar pilot pressure is available, while the pilot circuit must not exceed 250 bar. The valve offers a mean time to dangerous failure of 150 years, showing high reliability in safety-oriented installations.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Max Flow (symbol J)
300 l/min
Max Pilot Pressure
250 bar
Max Pressure (port T)
250 bar
Max Pressure (port Y)
250 bar
Max Pressure (ports P, A, B)
280 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Pattern
ISO 4401-07-07-0-05
Mounting Screws
M10 x 60 (ISO 4762)
Mttfd
150 years
Pilot Connections
External (X, Y)
Pilot Flow For Shortest Switch Time
35 l/min
Pilot Volume (spring-centered)
5.72 cm3
Size
NG16
Surface Protection Max Thickness
100 µm
Weight (type Wh)
7.3 kg
1620 Old Apex Road
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