Bosch Rexroth | 4WRZ16W6-150-7X6EG24N9ETK4M
4WRZ16W6-150-7X/6EG24N9ETK4/M
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The 4WRZ16W6-150-7X/6EG24N9ETK4/M valve is manufactured by Bosch Rexroth for the WRZ Proportional Directional Valves series and is used to meter flow and shift actuator ports in hydraulic automation. Valve size 16 establishes the mounting footprint and determines the achievable flow range, while spool type W6 arranges the internal flow paths for symmetrical bidirectional control. A porting pattern conforming to ISO 4401-07-06-0-94 lets the unit bolt directly to standard subplates, reducing plumbing complexity. The nominal flow rating is 150 l/min at a 10 bar pressure drop, providing sufficient capacity for medium-power circuits. Maximum operating pressure of 350 bar allows the valve to function in high-pressure systems without derating. Internal pilot supply and internal drain (code ET) remove the need for external pilot lines, and a return port pressure limit of 30 bar protects the drain gallery. NBR sealing material (code M) offers compatibility with common mineral oils used in mobile and industrial hydraulics.
Electrical characteristics begin with a coil resistance of 4.8 Ω at 20 °C, which defines the current drawn from the driver electronics. A maximum coil current of 1.5 A generates the magnetic force required for proportional spool positioning, and a 100 % duty cycle permits continuous energization during long machine cycles. The coil can tolerate temperatures up to 150 °C before thermal insulation limits are reached. A DIN EN 175301-803 plug coded K4 provides the electrical interface for quick field replacement. When paired with a cable socket, the enclosure achieves IP65 protection, shielding the solenoid against dust and water jets. A concealed manual override identified by code N9 lets maintenance personnel shift the spool mechanically during commissioning or power loss. The valve weighs 13.4 kg, a value that informs mounting bracket design and handling procedures.
Technical Specifications
Coil Resistance
4.8 Ω (20 °C)
Duty Cycle
100 %
Electrical Connection
DIN EN 175301-803 Plug (K4)
Manual Override
Concealed (N9)
Max Coil Current
1.5 A
Max Coil Temperature
150 °C
Max Operating Pressure
350 bar
Nominal Flow
150 l/min (Δp=10 bar)
Pilot Supply/drain
Internal/Internal (ET)
Porting Pattern
ISO 4401-07-06-0-94
Return Port Pressure (internal Drain)
30 bar
Seal Material
NBR (M)
Spool Type
W6
Type Of Protection
IP65 (with cable socket)
Valve Size
16
Weight
13.4 kg
1620 Old Apex Road
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