Bosch Rexroth | 3WRCBH50VF750M-1XZM
3WRCBH50VF750M-1X/ZM
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The 3WRCBH50VF750M-1X/ZM valve is part of the 3WRCBH Cartridge Valves series from Bosch Rexroth and serves as a three-way proportional element for hydraulic automation. Its nominal size of 50 provides large flow passages suited to manifold blocks. A rated flow of 750 l/min at a 5 bar differential supports fast cylinder movement, while the assembly withstands operating pressures up to 315 bar for heavy-load circuits. The area ratio of 1 : 1.5 balances hydraulic forces so modulation remains stable. A pilot flow of 28 l/min feeds the control stage and works with an actuating time of 50 ms to deliver quick response. Zero spool overlap removes deadband during direction changes, and the cartridge mass of 14.7 kg influences manifold design and handling procedures.
The valve handles hydraulic fluid temperatures up to 80 °C, protecting components from thermal stress, and it accepts viscosities as high as 800 mm²/s so cold-start operation remains smooth. NBR seals provide compatibility with common mineral oils, while required oil cleanliness of ISO 4406 18/16/13 guides filter selection. An internal DC/DC transducer is powered by a ±15 V supply and returns a ±10 V position signal that interfaces with motion controllers; connected electronics must offer at least 10 kΩ load resistance to prevent signal distortion. These electrical limits complement the mechanical ratings and ensure the valve integrates correctly in closed-loop hydraulic control systems.
Technical Specifications
Actuating Time (a–x;b–z)
50 ms
Area Ratio
1:1.5
Cleanliness Class
ISO 4406 18/16/13
Hydraulic Fluid Temp Max
80 °C
Load Resistance Min
10 kΩ
Mass
14.7 kg
Max Operating Pressure
315 bar
Nominal Size (ng)
50
Pilot Flow
28 l/min
Rated Flow (Δp = 5 Bar)
750 l/min
Seal Material
NBR
Spool Overlap
Zero
Transducer Output Signal
±10 V
Transducer Supply Voltage
±15 V
Transducer Technology
DC/DC
Viscosity Max
800 mm²/s
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