Bosch Rexroth | 4WRZ16W8-150-7X6EG24N9TK4V
4WRZ16W8-150-7X/6EG24N9TK4/V
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The 4WRZ16W8-150-7X/6EG24N9TK4/V proportional directional valve belongs to the WRZ Proportional Directional Valves series and is produced by Bosch Rexroth for hydraulic automation tasks that require electrically controlled flow metering. A nominal flow capability of 150 l/min at a 10 bar differential defines the volume it can pass to actuators. The main stage withstands system pressures up to 350 bar, enabling installation in high-pressure circuits. A 24 V DC supply energizes the solenoid, and the winding shows 4.8 Ω resistance at 20 °C, setting the starting current. Drive electronics may apply as much as 1.5 A to obtain full spool movement. Continuous energization is permitted because the duty cycle is 100 %, and coil materials allow surface temperatures up to 150 °C without damage. With the specified socket fitted, the enclosure reaches an IP65 rating, protecting internal parts from dust and water jets.
The valve’s command value overlap is 15 %, establishing the dead-band through which the spool begins to open and ensuring stable neutral positioning. Pilot operation requires 5.5 l/min of oil to move the spool from 0 to 100 % stroke, and this action displaces 4.6 cm³ of pilot volume, data useful for sizing control lines. The return line can accept up to 30 bar because the T port is internally drained to that limit. All service ports—A, B, P, and T—share a diameter of 20 mm, matching the flow rating. Electrical hookup is made through a connector that follows DIN EN 175301-803, simplifying cable selection. Mounting interfaces conform to ISO 4401-07-06-0-94 so the unit can bolt to standard subplates, and its mass of 13.4 kg must be supported when designing the manifold or bracket.
Technical Specifications
Coil Resistance (20 °c)
4.8 Ω
Command Value Overlap
15 %
Duty Cycle
100 %
Electrical Connection
DIN EN 175301-803
Ingress Protection
IP65 (with socket)
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Main Valve Pressure
350 bar
Max Port T Pressure (int Drain)
30 bar
Nominal Flow (Δp=10 Bar)
150 l/min
Pilot Oil Flow (0→100%)
5.5 l/min
Pilot Oil Volume (0→100%)
4.6 cm3
Port Diameter (a/b/p/t)
20 mm
Porting Pattern
ISO 4401-07-06-0-94
Supply Voltage
24 VDC
Weight (subplate Mounting)
13.4 kg
1620 Old Apex Road
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