Bosch Rexroth | H-4WEH16H7X6EG12N9ETSK4B10P4-5D3
H-4WEH16H7X/6EG12N9ETSK4/B10P4 5D3
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The H-4WEH16H7X/6EG12N9ETSK4/B10P4 5D3 directional spool valve controls actuator flow paths in hydraulic circuits. It belongs to the WEH Directional Spool Valves series from Bosch Rexroth. The valve fits NG16 subplates because its nominal size is 16, and the porting pattern follows ISO 4401 for interchangeability with standard manifolds. Flow capacity for symbol E reaches 300 l/min, allowing high volume transmission while maintaining accurate switching. A maximum operating pressure of 350 bar on ports P, A, and B lets the unit function in high-pressure systems common in industrial presses and mobile machines. Pilot supply and pilot return are both internal (ET) so no external pilot lines are required. The pilot stage tolerates up to 250 bar and is safeguarded by a preload valve set to 4.5 bar to ensure reliable shifting. Electrical actuation uses a DIN EN 175301-803 type K4 plug, simplifying solenoid wiring during installation.
System reliability and installation details are also defined. The valve meets contamination level 20/18/15 per ISO 4406, so upstream filtration must be sized accordingly. For the spring-centered three-position version, the pilot stage needs at least 14 bar to shift and displaces 5.72 cm³ of oil each cycle, data that aids accumulator sizing and response calculations. A built-in 1.0 mm throttle orifice moderates pilot flow, reducing shock during spool movement, while the D3 pressure reducing element stabilizes control pressure under fluctuating supply conditions. Service life is represented by an MTTFd of 100 years, supporting safety ratings in machinery directives. Four M10 × 60 mounting screws secure the body to the subplate and maintain the seal at working pressure. Together these characteristics complete the functional profile and confirm compatibility with demanding hydraulic automation tasks.
Technical Specifications
Cleanliness Class (iso 4406 (c))
20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (ng16, Symbol E)
300 l/min
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (3-position, Spring-centered)
14 bar
Mounting Screws
4x M10 x 60
Mttfd
100 years
Nominal Size
16
Pilot Return
Internal (ET)
Pilot Supply
Internal (ET)
Pilot Volume (3-position, Spring-centered)
5.72 cm3
Porting Pattern
ISO 4401
Preload Valve Setting
4.5 bar
Pressure Reducing Valve
D3
Throttle Orifice Diameter
1.0 mm
1620 Old Apex Road
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