Bosch Rexroth | 4WRZ16W6-150-7X6EG24N9ETK4D3M-674
4WRZ16W6-150-7X/6EG24N9ETK4/D3M-674
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The 4WRZ16W6-150-7X/6EG24N9ETK4/D3M-674 is produced by Bosch Rexroth for the WRZ Proportional Directional Valves series. It meters flow and directs oil in hydraulic automation loops that require proportional control. The valve provides a nominal flow of 150 l/min at a differential pressure of 10 bar, so it handles medium-capacity circuits without excessive pressure loss. A maximum operating pressure of 350 bar permits installation in high-pressure supply lines, while the return flow channel accepts up to 30 bar at port T to protect the tank connection. The ISO 4401-07-06-0-94 porting pattern aligns with common subplates for straightforward block mounting. A pilot oil flow of 5.5 l/min and a pilot oil volume of 4.6 cm³ set the response speed and keep pilot power consumption low. The assembly weighs 13.4 kg, giving it the mass needed to resist vibration. A continuous 100 percent duty cycle lets the solenoid remain energized throughout extended machine cycles.
The cold coil resistance is 4.8 Ω, establishing the initial inrush characteristics, and it rises to 7.2 Ω when hot to moderate current as the winding heats. Drive electronics must supply up to 1.5 A, the stated maximum current for full spool stroke. The winding can reach 150 °C without damage, enabling reliable service in areas with elevated ambient or oil temperatures. Electrical termination is made through a DIN EN 175301-803 connector, simplifying field wiring and replacement. The main stage requires oil filtered to ISO 4406 20/18/15 to keep the spool clear of contamination, whereas the pilot stage needs cleaner oil at ISO 4406 18/16/13 to maintain precise proportional control. Environmental sealing meets IP65, so the housing blocks dust and low-pressure water jets encountered around presses and test rigs. Together these electrical and cleanliness limits define the interface conditions that must be met for dependable proportional performance.
Technical Specifications
Cleanliness Class (main Valve)
ISO 4406 20/18/15
Cleanliness Class (pilot Valve)
ISO 4406 18/16/13
Coil Resistance (cold)
4.8 Ω
Coil Resistance (hot)
7.2 Ω
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure
350 bar
Max Return Flow Pressure (port T)
30 bar
Nominal Flow
150 l/min (Δp=10 bar)
Pilot Oil Flow
5.5 l/min
Pilot Oil Volume
4.6 cm3
Porting Pattern
ISO 4401-07-06-0-94
Type Of Protection
IP65
Weight
13.4 kg
1620 Old Apex Road
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