Bosch Rexroth | 4WH16J7XV
4WH16J7X//V
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The 4WH16J7X//V directional valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automation circuits that require rapid switching and reliable pressure control. The valve corresponds to size NG16, which defines its flow passages and mounting footprint. A maximum flow rate of 300 l/min, referenced to symbol J, allows the unit to handle high volume circuits without excessive pressure loss. The working ports P, A, and B are rated for 280 bar, supporting medium to high pressure systems. Return port T and drain port Y each tolerate up to 250 bar so back-pressure does not compromise switching accuracy. Pilot operation may be engaged with pressures from 14 bar to 250 bar, giving a wide control range for spring-centered actuation. For the quickest shifting cycle the pilot stage needs 35 l/min, ensuring the spool reaches its end position without delay.
Installation follows the ISO 4401-07-07-0-05 mounting pattern, and the fixing screws must be tightened to 58 Nm to maintain seal integrity. The valve weighs 7.3 kg, allowing straightforward handling during assembly. Hydraulic media should have a viscosity between 2.8 and 500 mm²/s so that the spool moves predictably under pilot pressure. The acceptable fluid temperature spans ‑15 to +80 °C, while ambient conditions may range from ‑15 to +50 °C without affecting performance. A pilot volume of 5.72 cm³ is displaced in spring-centered operation, which defines the oil required to shift the control spool. System cleanliness must reach ISO 4406 class 20/18/15 or better to prevent wear at the sealing edges and maintain switching reliability.
Technical Specifications
Ambient Temperature (fkm)
-15 to +50 C
Cleanliness Class
ISO 4406 20/18/15
Fluid Temperature (fkm)
-15 to +80 C
Max Flow (symbol J)
300 l/min
Max Pilot Pressure
250 bar
Max Pressure (p, A, B)
280 bar
Max Pressure Port T
250 bar
Max Pressure Port Y
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Pattern
ISO 4401-07-07-0-05
Mounting Screw Torque
58 Nm
Pilot Flow (fastest Switching)
35 l/min
Pilot Volume (spring-centered)
5.72 cm3
Size
NG16
Viscosity Range
2.8 to 500 mm2/s
Weight (type Wh, Ng16)
7.3 kg
1620 Old Apex Road
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